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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
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., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, 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 /* whether address was written yet */
1536 bfd_boolean written_address_p;
1537 } elf_linker_section_pointers_t;
1538
1539 struct ppc_elf_obj_tdata
1540 {
1541 struct elf_obj_tdata elf;
1542
1543 /* A mapping from local symbols to offsets into the various linker
1544 sections added. This is index by the symbol index. */
1545 elf_linker_section_pointers_t **linker_section_pointers;
1546 };
1547
1548 #define ppc_elf_tdata(bfd) \
1549 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1550
1551 #define elf_local_ptr_offsets(bfd) \
1552 (ppc_elf_tdata (bfd)->linker_section_pointers)
1553
1554 /* Override the generic function because we store some extras. */
1555
1556 static bfd_boolean
1557 ppc_elf_mkobject (bfd *abfd)
1558 {
1559 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1560 abfd->tdata.any = bfd_zalloc (abfd, amt);
1561 if (abfd->tdata.any == NULL)
1562 return FALSE;
1563 return TRUE;
1564 }
1565
1566 /* Fix bad default arch selected for a 32 bit input bfd when the
1567 default is 64 bit. */
1568
1569 static bfd_boolean
1570 ppc_elf_object_p (bfd *abfd)
1571 {
1572 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1573 {
1574 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1575
1576 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1577 {
1578 /* Relies on arch after 64 bit default being 32 bit default. */
1579 abfd->arch_info = abfd->arch_info->next;
1580 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1581 }
1582 }
1583 return TRUE;
1584 }
1585
1586 /* Function to set whether a module needs the -mrelocatable bit set. */
1587
1588 static bfd_boolean
1589 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1590 {
1591 BFD_ASSERT (!elf_flags_init (abfd)
1592 || elf_elfheader (abfd)->e_flags == flags);
1593
1594 elf_elfheader (abfd)->e_flags = flags;
1595 elf_flags_init (abfd) = TRUE;
1596 return TRUE;
1597 }
1598
1599 /* Support for core dump NOTE sections. */
1600
1601 static bfd_boolean
1602 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1603 {
1604 int offset;
1605 unsigned int size;
1606
1607 switch (note->descsz)
1608 {
1609 default:
1610 return FALSE;
1611
1612 case 268: /* Linux/PPC. */
1613 /* pr_cursig */
1614 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1615
1616 /* pr_pid */
1617 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1618
1619 /* pr_reg */
1620 offset = 72;
1621 size = 192;
1622
1623 break;
1624 }
1625
1626 /* Make a ".reg/999" section. */
1627 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1628 size, note->descpos + offset);
1629 }
1630
1631 static bfd_boolean
1632 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1633 {
1634 switch (note->descsz)
1635 {
1636 default:
1637 return FALSE;
1638
1639 case 128: /* Linux/PPC elf_prpsinfo. */
1640 elf_tdata (abfd)->core_program
1641 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1642 elf_tdata (abfd)->core_command
1643 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1644 }
1645
1646 /* Note that for some reason, a spurious space is tacked
1647 onto the end of the args in some (at least one anyway)
1648 implementations, so strip it off if it exists. */
1649
1650 {
1651 char *command = elf_tdata (abfd)->core_command;
1652 int n = strlen (command);
1653
1654 if (0 < n && command[n - 1] == ' ')
1655 command[n - 1] = '\0';
1656 }
1657
1658 return TRUE;
1659 }
1660
1661 /* Return address for Ith PLT stub in section PLT, for relocation REL
1662 or (bfd_vma) -1 if it should not be included. */
1663
1664 static bfd_vma
1665 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1666 const asection *plt ATTRIBUTE_UNUSED,
1667 const arelent *rel)
1668 {
1669 return rel->address;
1670 }
1671
1672 /* Handle a PowerPC specific section when reading an object file. This
1673 is called when bfd_section_from_shdr finds a section with an unknown
1674 type. */
1675
1676 static bfd_boolean
1677 ppc_elf_section_from_shdr (bfd *abfd,
1678 Elf_Internal_Shdr *hdr,
1679 const char *name,
1680 int shindex)
1681 {
1682 asection *newsect;
1683 flagword flags;
1684
1685 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1686 return FALSE;
1687
1688 newsect = hdr->bfd_section;
1689 flags = bfd_get_section_flags (abfd, newsect);
1690 if (hdr->sh_flags & SHF_EXCLUDE)
1691 flags |= SEC_EXCLUDE;
1692
1693 if (hdr->sh_type == SHT_ORDERED)
1694 flags |= SEC_SORT_ENTRIES;
1695
1696 bfd_set_section_flags (abfd, newsect, flags);
1697 return TRUE;
1698 }
1699
1700 /* Set up any other section flags and such that may be necessary. */
1701
1702 static bfd_boolean
1703 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1704 Elf_Internal_Shdr *shdr,
1705 asection *asect)
1706 {
1707 if ((asect->flags & SEC_EXCLUDE) != 0)
1708 shdr->sh_flags |= SHF_EXCLUDE;
1709
1710 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1711 shdr->sh_type = SHT_ORDERED;
1712
1713 return TRUE;
1714 }
1715
1716 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1717 need to bump up the number of section headers. */
1718
1719 static int
1720 ppc_elf_additional_program_headers (bfd *abfd)
1721 {
1722 asection *s;
1723 int ret = 0;
1724
1725 s = bfd_get_section_by_name (abfd, ".sbss2");
1726 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1727 ++ret;
1728
1729 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1730 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1731 ++ret;
1732
1733 return ret;
1734 }
1735
1736 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1737 .PPC.EMB.sbss0 a normal section, and not a bss section so
1738 that the linker doesn't crater when trying to make more than
1739 2 sections. */
1740
1741 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
1742 {
1743 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1744 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1745 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1746 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1747 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1748 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1749 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1750 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1751 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1752 { NULL, 0, 0, 0, 0 }
1753 };
1754 \f
1755 /* Very simple linked list structure for recording apuinfo values. */
1756 typedef struct apuinfo_list
1757 {
1758 struct apuinfo_list *next;
1759 unsigned long value;
1760 }
1761 apuinfo_list;
1762
1763 static apuinfo_list *head;
1764
1765
1766 static void
1767 apuinfo_list_init (void)
1768 {
1769 head = NULL;
1770 }
1771
1772 static void
1773 apuinfo_list_add (unsigned long value)
1774 {
1775 apuinfo_list *entry = head;
1776
1777 while (entry != NULL)
1778 {
1779 if (entry->value == value)
1780 return;
1781 entry = entry->next;
1782 }
1783
1784 entry = bfd_malloc (sizeof (* entry));
1785 if (entry == NULL)
1786 return;
1787
1788 entry->value = value;
1789 entry->next = head;
1790 head = entry;
1791 }
1792
1793 static unsigned
1794 apuinfo_list_length (void)
1795 {
1796 apuinfo_list *entry;
1797 unsigned long count;
1798
1799 for (entry = head, count = 0;
1800 entry;
1801 entry = entry->next)
1802 ++ count;
1803
1804 return count;
1805 }
1806
1807 static inline unsigned long
1808 apuinfo_list_element (unsigned long number)
1809 {
1810 apuinfo_list * entry;
1811
1812 for (entry = head;
1813 entry && number --;
1814 entry = entry->next)
1815 ;
1816
1817 return entry ? entry->value : 0;
1818 }
1819
1820 static void
1821 apuinfo_list_finish (void)
1822 {
1823 apuinfo_list *entry;
1824
1825 for (entry = head; entry;)
1826 {
1827 apuinfo_list *next = entry->next;
1828 free (entry);
1829 entry = next;
1830 }
1831
1832 head = NULL;
1833 }
1834
1835 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
1836 #define APUINFO_LABEL "APUinfo"
1837
1838 /* Scan the input BFDs and create a linked list of
1839 the APUinfo values that will need to be emitted. */
1840
1841 static void
1842 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1843 {
1844 bfd *ibfd;
1845 asection *asec;
1846 char *buffer;
1847 unsigned num_input_sections;
1848 bfd_size_type output_section_size;
1849 unsigned i;
1850 unsigned num_entries;
1851 unsigned long offset;
1852 unsigned long length;
1853 const char *error_message = NULL;
1854
1855 if (link_info == NULL)
1856 return;
1857
1858 /* Scan the input bfds, looking for apuinfo sections. */
1859 num_input_sections = 0;
1860 output_section_size = 0;
1861
1862 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1863 {
1864 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1865 if (asec)
1866 {
1867 ++ num_input_sections;
1868 output_section_size += asec->size;
1869 }
1870 }
1871
1872 /* We need at least one input sections
1873 in order to make merging worthwhile. */
1874 if (num_input_sections < 1)
1875 return;
1876
1877 /* Just make sure that the output section exists as well. */
1878 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1879 if (asec == NULL)
1880 return;
1881
1882 /* Allocate a buffer for the contents of the input sections. */
1883 buffer = bfd_malloc (output_section_size);
1884 if (buffer == NULL)
1885 return;
1886
1887 offset = 0;
1888 apuinfo_list_init ();
1889
1890 /* Read in the input sections contents. */
1891 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1892 {
1893 unsigned long datum;
1894 char *ptr;
1895
1896 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1897 if (asec == NULL)
1898 continue;
1899
1900 length = asec->size;
1901 if (length < 24)
1902 {
1903 error_message = _("corrupt or empty %s section in %B");
1904 goto fail;
1905 }
1906
1907 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1908 || (bfd_bread (buffer + offset, length, ibfd) != length))
1909 {
1910 error_message = _("unable to read in %s section from %B");
1911 goto fail;
1912 }
1913
1914 /* Process the contents of the section. */
1915 ptr = buffer + offset;
1916 error_message = _("corrupt %s section in %B");
1917
1918 /* Verify the contents of the header. Note - we have to
1919 extract the values this way in order to allow for a
1920 host whose endian-ness is different from the target. */
1921 datum = bfd_get_32 (ibfd, ptr);
1922 if (datum != sizeof APUINFO_LABEL)
1923 goto fail;
1924
1925 datum = bfd_get_32 (ibfd, ptr + 8);
1926 if (datum != 0x2)
1927 goto fail;
1928
1929 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
1930 goto fail;
1931
1932 /* Get the number of bytes used for apuinfo entries. */
1933 datum = bfd_get_32 (ibfd, ptr + 4);
1934 if (datum + 20 != length)
1935 goto fail;
1936
1937 /* Make sure that we do not run off the end of the section. */
1938 if (offset + length > output_section_size)
1939 goto fail;
1940
1941 /* Scan the apuinfo section, building a list of apuinfo numbers. */
1942 for (i = 0; i < datum; i += 4)
1943 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
1944
1945 /* Update the offset. */
1946 offset += length;
1947 }
1948
1949 error_message = NULL;
1950
1951 /* Compute the size of the output section. */
1952 num_entries = apuinfo_list_length ();
1953 output_section_size = 20 + num_entries * 4;
1954
1955 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1956
1957 if (! bfd_set_section_size (abfd, asec, output_section_size))
1958 ibfd = abfd,
1959 error_message = _("warning: unable to set size of %s section in %B");
1960
1961 fail:
1962 free (buffer);
1963
1964 if (error_message)
1965 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
1966 }
1967
1968 /* Prevent the output section from accumulating the input sections'
1969 contents. We have already stored this in our linked list structure. */
1970
1971 static bfd_boolean
1972 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1973 asection *asec,
1974 bfd_byte *contents ATTRIBUTE_UNUSED)
1975 {
1976 return (apuinfo_list_length ()
1977 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
1978 }
1979
1980 /* Finally we can generate the output section. */
1981
1982 static void
1983 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
1984 {
1985 bfd_byte *buffer;
1986 asection *asec;
1987 unsigned i;
1988 unsigned num_entries;
1989 bfd_size_type length;
1990
1991 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1992 if (asec == NULL)
1993 return;
1994
1995 if (apuinfo_list_length () == 0)
1996 return;
1997
1998 length = asec->size;
1999 if (length < 20)
2000 return;
2001
2002 buffer = bfd_malloc (length);
2003 if (buffer == NULL)
2004 {
2005 (*_bfd_error_handler)
2006 (_("failed to allocate space for new APUinfo section."));
2007 return;
2008 }
2009
2010 /* Create the apuinfo header. */
2011 num_entries = apuinfo_list_length ();
2012 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2013 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2014 bfd_put_32 (abfd, 0x2, buffer + 8);
2015 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2016
2017 length = 20;
2018 for (i = 0; i < num_entries; i++)
2019 {
2020 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2021 length += 4;
2022 }
2023
2024 if (length != asec->size)
2025 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2026
2027 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2028 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2029
2030 free (buffer);
2031
2032 apuinfo_list_finish ();
2033 }
2034 \f
2035 /* The following functions are specific to the ELF linker, while
2036 functions above are used generally. They appear in this file more
2037 or less in the order in which they are called. eg.
2038 ppc_elf_check_relocs is called early in the link process,
2039 ppc_elf_finish_dynamic_sections is one of the last functions
2040 called. */
2041
2042 /* The PPC linker needs to keep track of the number of relocs that it
2043 decides to copy as dynamic relocs in check_relocs for each symbol.
2044 This is so that it can later discard them if they are found to be
2045 unnecessary. We store the information in a field extending the
2046 regular ELF linker hash table. */
2047
2048 struct ppc_elf_dyn_relocs
2049 {
2050 struct ppc_elf_dyn_relocs *next;
2051
2052 /* The input section of the reloc. */
2053 asection *sec;
2054
2055 /* Total number of relocs copied for the input section. */
2056 bfd_size_type count;
2057
2058 /* Number of pc-relative relocs copied for the input section. */
2059 bfd_size_type pc_count;
2060 };
2061
2062 /* Of those relocs that might be copied as dynamic relocs, this macro
2063 selects those that must be copied when linking a shared library,
2064 even when the symbol is local. */
2065
2066 #define MUST_BE_DYN_RELOC(RTYPE) \
2067 ((RTYPE) != R_PPC_REL24 \
2068 && (RTYPE) != R_PPC_REL14 \
2069 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2070 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2071 && (RTYPE) != R_PPC_REL32)
2072
2073 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2074 copying dynamic variables from a shared lib into an app's dynbss
2075 section, and instead use a dynamic relocation to point into the
2076 shared lib. */
2077 #define ELIMINATE_COPY_RELOCS 1
2078
2079 /* PPC ELF linker hash entry. */
2080
2081 struct ppc_elf_link_hash_entry
2082 {
2083 struct elf_link_hash_entry elf;
2084
2085 /* If this symbol is used in the linker created sections, the processor
2086 specific backend uses this field to map the field into the offset
2087 from the beginning of the section. */
2088 elf_linker_section_pointers_t *linker_section_pointer;
2089
2090 /* Track dynamic relocs copied for this symbol. */
2091 struct ppc_elf_dyn_relocs *dyn_relocs;
2092
2093 /* Contexts in which symbol is used in the GOT (or TOC).
2094 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2095 corresponding relocs are encountered during check_relocs.
2096 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2097 indicate the corresponding GOT entry type is not needed. */
2098 #define TLS_GD 1 /* GD reloc. */
2099 #define TLS_LD 2 /* LD reloc. */
2100 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2101 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2102 #define TLS_TLS 16 /* Any TLS reloc. */
2103 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2104 char tls_mask;
2105 };
2106
2107 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2108
2109 /* PPC ELF linker hash table. */
2110
2111 struct ppc_elf_link_hash_table
2112 {
2113 struct elf_link_hash_table elf;
2114
2115 /* Short-cuts to get to dynamic linker sections. */
2116 asection *got;
2117 asection *relgot;
2118 asection *plt;
2119 asection *relplt;
2120 asection *dynbss;
2121 asection *relbss;
2122 asection *dynsbss;
2123 asection *relsbss;
2124 elf_linker_section_t sdata[2];
2125 asection *sbss;
2126
2127 /* Shortcut to .__tls_get_addr. */
2128 struct elf_link_hash_entry *tls_get_addr;
2129
2130 /* TLS local dynamic got entry handling. */
2131 union {
2132 bfd_signed_vma refcount;
2133 bfd_vma offset;
2134 } tlsld_got;
2135
2136 /* Small local sym to section mapping cache. */
2137 struct sym_sec_cache sym_sec;
2138 };
2139
2140 /* Get the PPC ELF linker hash table from a link_info structure. */
2141
2142 #define ppc_elf_hash_table(p) \
2143 ((struct ppc_elf_link_hash_table *) (p)->hash)
2144
2145 /* Create an entry in a PPC ELF linker hash table. */
2146
2147 static struct bfd_hash_entry *
2148 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2149 struct bfd_hash_table *table,
2150 const char *string)
2151 {
2152 /* Allocate the structure if it has not already been allocated by a
2153 subclass. */
2154 if (entry == NULL)
2155 {
2156 entry = bfd_hash_allocate (table,
2157 sizeof (struct ppc_elf_link_hash_entry));
2158 if (entry == NULL)
2159 return entry;
2160 }
2161
2162 /* Call the allocation method of the superclass. */
2163 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2164 if (entry != NULL)
2165 {
2166 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2167 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2168 ppc_elf_hash_entry (entry)->tls_mask = 0;
2169 }
2170
2171 return entry;
2172 }
2173
2174 /* Create a PPC ELF linker hash table. */
2175
2176 static struct bfd_link_hash_table *
2177 ppc_elf_link_hash_table_create (bfd *abfd)
2178 {
2179 struct ppc_elf_link_hash_table *ret;
2180
2181 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2182 if (ret == NULL)
2183 return NULL;
2184
2185 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2186 ppc_elf_link_hash_newfunc))
2187 {
2188 free (ret);
2189 return NULL;
2190 }
2191
2192 ret->sdata[0].name = ".sdata";
2193 ret->sdata[0].sym_name = "_SDA_BASE_";
2194 ret->sdata[0].bss_name = ".sbss";
2195
2196 ret->sdata[1].name = ".sdata2";
2197 ret->sdata[1].sym_name = "_SDA2_BASE_";
2198 ret->sdata[1].bss_name = ".sbss2";
2199
2200 return &ret->elf.root;
2201 }
2202
2203 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2204
2205 static bfd_boolean
2206 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2207 {
2208 struct ppc_elf_link_hash_table *htab;
2209 asection *s;
2210 flagword flags;
2211
2212 if (!_bfd_elf_create_got_section (abfd, info))
2213 return FALSE;
2214
2215 htab = ppc_elf_hash_table (info);
2216 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2217 if (s == NULL)
2218 abort ();
2219
2220 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2221 | SEC_LINKER_CREATED);
2222 if (!bfd_set_section_flags (abfd, s, flags))
2223 return FALSE;
2224
2225 htab->relgot = bfd_make_section (abfd, ".rela.got");
2226 if (!htab->relgot
2227 || ! bfd_set_section_flags (abfd, htab->relgot,
2228 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2229 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2230 | SEC_READONLY))
2231 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2232 return FALSE;
2233
2234 return TRUE;
2235 }
2236
2237 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2238 to output sections (just like _bfd_elf_create_dynamic_sections has
2239 to create .dynbss and .rela.bss). */
2240
2241 static bfd_boolean
2242 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2243 {
2244 struct ppc_elf_link_hash_table *htab;
2245 asection *s;
2246 flagword flags;
2247
2248 htab = ppc_elf_hash_table (info);
2249
2250 if (htab->got == NULL
2251 && !ppc_elf_create_got (abfd, info))
2252 return FALSE;
2253
2254 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2255 return FALSE;
2256
2257 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2258 | SEC_LINKER_CREATED);
2259
2260 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2261 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2262 if (s == NULL
2263 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
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 (abfd, ".rela.sbss");
2270 if (s == NULL
2271 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2272 || ! bfd_set_section_alignment (abfd, s, 2))
2273 return FALSE;
2274 }
2275
2276 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2277 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2278 if (s == NULL)
2279 abort ();
2280
2281 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2282 return bfd_set_section_flags (abfd, s, flags);
2283 }
2284
2285 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2286
2287 static void
2288 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
2289 struct elf_link_hash_entry *dir,
2290 struct elf_link_hash_entry *ind)
2291 {
2292 struct ppc_elf_link_hash_entry *edir, *eind;
2293
2294 edir = (struct ppc_elf_link_hash_entry *) dir;
2295 eind = (struct ppc_elf_link_hash_entry *) ind;
2296
2297 if (eind->dyn_relocs != NULL)
2298 {
2299 if (edir->dyn_relocs != NULL)
2300 {
2301 struct ppc_elf_dyn_relocs **pp;
2302 struct ppc_elf_dyn_relocs *p;
2303
2304 if (ind->root.type == bfd_link_hash_indirect)
2305 abort ();
2306
2307 /* Add reloc counts against the weak sym to the strong sym
2308 list. Merge any entries against the same section. */
2309 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2310 {
2311 struct ppc_elf_dyn_relocs *q;
2312
2313 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2314 if (q->sec == p->sec)
2315 {
2316 q->pc_count += p->pc_count;
2317 q->count += p->count;
2318 *pp = p->next;
2319 break;
2320 }
2321 if (q == NULL)
2322 pp = &p->next;
2323 }
2324 *pp = edir->dyn_relocs;
2325 }
2326
2327 edir->dyn_relocs = eind->dyn_relocs;
2328 eind->dyn_relocs = NULL;
2329 }
2330
2331 edir->tls_mask |= eind->tls_mask;
2332
2333 if (ELIMINATE_COPY_RELOCS
2334 && ind->root.type != bfd_link_hash_indirect
2335 && dir->dynamic_adjusted)
2336 {
2337 /* If called to transfer flags for a weakdef during processing
2338 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2339 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2340 dir->ref_dynamic |= ind->ref_dynamic;
2341 dir->ref_regular |= ind->ref_regular;
2342 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
2343 dir->needs_plt |= ind->needs_plt;
2344 }
2345 else
2346 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2347 }
2348
2349 /* Return 1 if target is one of ours. */
2350
2351 static bfd_boolean
2352 is_ppc_elf_target (const struct bfd_target *targ)
2353 {
2354 extern const bfd_target bfd_elf32_powerpc_vec;
2355 extern const bfd_target bfd_elf32_powerpcle_vec;
2356
2357 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2358 }
2359
2360 /* Hook called by the linker routine which adds symbols from an object
2361 file. We use it to put .comm items in .sbss, and not .bss. */
2362
2363 static bfd_boolean
2364 ppc_elf_add_symbol_hook (bfd *abfd,
2365 struct bfd_link_info *info,
2366 Elf_Internal_Sym *sym,
2367 const char **namep ATTRIBUTE_UNUSED,
2368 flagword *flagsp ATTRIBUTE_UNUSED,
2369 asection **secp,
2370 bfd_vma *valp)
2371 {
2372 if (sym->st_shndx == SHN_COMMON
2373 && !info->relocatable
2374 && sym->st_size <= elf_gp_size (abfd)
2375 && is_ppc_elf_target (info->hash->creator))
2376 {
2377 /* Common symbols less than or equal to -G nn bytes are automatically
2378 put into .sbss. */
2379 struct ppc_elf_link_hash_table *htab;
2380
2381 htab = ppc_elf_hash_table (info);
2382 if (htab->sbss == NULL)
2383 {
2384 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2385
2386 if (!htab->elf.dynobj)
2387 htab->elf.dynobj = abfd;
2388
2389 htab->sbss = bfd_make_section_anyway (htab->elf.dynobj, ".sbss");
2390 if (htab->sbss == NULL
2391 || ! bfd_set_section_flags (htab->elf.dynobj, htab->sbss, flags))
2392 return FALSE;
2393 }
2394
2395 *secp = htab->sbss;
2396 *valp = sym->st_size;
2397 }
2398
2399 return TRUE;
2400 }
2401 \f
2402 /* Create a special linker section. */
2403
2404 static bfd_boolean
2405 ppc_elf_create_linker_section (bfd *abfd,
2406 struct bfd_link_info *info,
2407 flagword flags,
2408 elf_linker_section_t *lsect)
2409 {
2410 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2411 asection *s;
2412
2413 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2414 | SEC_LINKER_CREATED);
2415
2416 /* Record the first bfd that needs the special sections. */
2417 if (!htab->elf.dynobj)
2418 htab->elf.dynobj = abfd;
2419
2420 /* See if the section already exists. */
2421 s = bfd_get_section_by_name (htab->elf.dynobj, lsect->name);
2422 if (s == NULL || (s->flags & flags) != flags)
2423 {
2424 s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
2425 if (s == NULL
2426 || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
2427 return FALSE;
2428 }
2429 lsect->section = s;
2430
2431 if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
2432 && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2433 return FALSE;
2434
2435 s->size = align_power (s->size, 2);
2436
2437 #ifdef DEBUG
2438 fprintf (stderr, "Creating section %s, current size = %ld\n",
2439 lsect->name, (long) s->size);
2440 #endif
2441
2442 return TRUE;
2443 }
2444
2445 /* Find a linker generated pointer with a given addend and type. */
2446
2447 static elf_linker_section_pointers_t *
2448 elf_find_pointer_linker_section
2449 (elf_linker_section_pointers_t *linker_pointers,
2450 bfd_vma addend,
2451 elf_linker_section_t *lsect)
2452 {
2453 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2454 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2455 return linker_pointers;
2456
2457 return NULL;
2458 }
2459
2460 /* Allocate a pointer to live in a linker created section. */
2461
2462 static bfd_boolean
2463 elf_create_pointer_linker_section (bfd *abfd,
2464 struct bfd_link_info *info,
2465 elf_linker_section_t *lsect,
2466 struct elf_link_hash_entry *h,
2467 const Elf_Internal_Rela *rel)
2468 {
2469 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2470 elf_linker_section_pointers_t *linker_section_ptr;
2471 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2472 bfd_size_type amt;
2473
2474 BFD_ASSERT (lsect != NULL);
2475
2476 /* Is this a global symbol? */
2477 if (h != NULL)
2478 {
2479 struct ppc_elf_link_hash_entry *eh;
2480
2481 /* Has this symbol already been allocated? If so, our work is done. */
2482 eh = (struct ppc_elf_link_hash_entry *) h;
2483 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2484 rel->r_addend,
2485 lsect))
2486 return TRUE;
2487
2488 ptr_linker_section_ptr = &eh->linker_section_pointer;
2489 /* Make sure this symbol is output as a dynamic symbol. */
2490 if (h->dynindx == -1)
2491 {
2492 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2493 return FALSE;
2494 }
2495 }
2496 else
2497 {
2498 /* Allocation of a pointer to a local symbol. */
2499 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2500
2501 /* Allocate a table to hold the local symbols if first time. */
2502 if (!ptr)
2503 {
2504 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2505
2506 amt = num_symbols;
2507 amt *= sizeof (elf_linker_section_pointers_t *);
2508 ptr = bfd_zalloc (abfd, amt);
2509
2510 if (!ptr)
2511 return FALSE;
2512
2513 elf_local_ptr_offsets (abfd) = ptr;
2514 }
2515
2516 /* Has this symbol already been allocated? If so, our work is done. */
2517 if (elf_find_pointer_linker_section (ptr[r_symndx],
2518 rel->r_addend,
2519 lsect))
2520 return TRUE;
2521
2522 ptr_linker_section_ptr = &ptr[r_symndx];
2523 }
2524
2525 /* Allocate space for a pointer in the linker section, and allocate
2526 a new pointer record from internal memory. */
2527 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2528 amt = sizeof (elf_linker_section_pointers_t);
2529 linker_section_ptr = bfd_alloc (abfd, amt);
2530
2531 if (!linker_section_ptr)
2532 return FALSE;
2533
2534 linker_section_ptr->next = *ptr_linker_section_ptr;
2535 linker_section_ptr->addend = rel->r_addend;
2536 linker_section_ptr->lsect = lsect;
2537 linker_section_ptr->written_address_p = FALSE;
2538 *ptr_linker_section_ptr = linker_section_ptr;
2539
2540 linker_section_ptr->offset = lsect->section->size;
2541 lsect->section->size += 4;
2542
2543 #ifdef DEBUG
2544 fprintf (stderr,
2545 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2546 lsect->name, (long) linker_section_ptr->offset,
2547 (long) lsect->section->size);
2548 #endif
2549
2550 return TRUE;
2551 }
2552
2553 static bfd_boolean
2554 update_local_sym_info (bfd *abfd,
2555 Elf_Internal_Shdr *symtab_hdr,
2556 unsigned long r_symndx,
2557 int tls_type)
2558 {
2559 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2560 char *local_got_tls_masks;
2561
2562 if (local_got_refcounts == NULL)
2563 {
2564 bfd_size_type size = symtab_hdr->sh_info;
2565
2566 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2567 local_got_refcounts = bfd_zalloc (abfd, size);
2568 if (local_got_refcounts == NULL)
2569 return FALSE;
2570 elf_local_got_refcounts (abfd) = local_got_refcounts;
2571 }
2572
2573 local_got_refcounts[r_symndx] += 1;
2574 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2575 local_got_tls_masks[r_symndx] |= tls_type;
2576 return TRUE;
2577 }
2578
2579 static void
2580 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2581 {
2582 (*_bfd_error_handler)
2583 (_("%B: relocation %s cannot be used when making a shared object"),
2584 abfd,
2585 ppc_elf_howto_table[r_type]->name);
2586 bfd_set_error (bfd_error_bad_value);
2587 }
2588
2589 /* Look through the relocs for a section during the first phase, and
2590 allocate space in the global offset table or procedure linkage
2591 table. */
2592
2593 static bfd_boolean
2594 ppc_elf_check_relocs (bfd *abfd,
2595 struct bfd_link_info *info,
2596 asection *sec,
2597 const Elf_Internal_Rela *relocs)
2598 {
2599 struct ppc_elf_link_hash_table *htab;
2600 Elf_Internal_Shdr *symtab_hdr;
2601 struct elf_link_hash_entry **sym_hashes;
2602 const Elf_Internal_Rela *rel;
2603 const Elf_Internal_Rela *rel_end;
2604 asection *sreloc;
2605
2606 if (info->relocatable)
2607 return TRUE;
2608
2609 #ifdef DEBUG
2610 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2611 sec, abfd);
2612 #endif
2613
2614 /* Initialize howto table if not already done. */
2615 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2616 ppc_elf_howto_init ();
2617
2618 htab = ppc_elf_hash_table (info);
2619 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2620 sym_hashes = elf_sym_hashes (abfd);
2621 sreloc = NULL;
2622
2623 rel_end = relocs + sec->reloc_count;
2624 for (rel = relocs; rel < rel_end; rel++)
2625 {
2626 unsigned long r_symndx;
2627 enum elf_ppc_reloc_type r_type;
2628 struct elf_link_hash_entry *h;
2629 int tls_type = 0;
2630
2631 r_symndx = ELF32_R_SYM (rel->r_info);
2632 if (r_symndx < symtab_hdr->sh_info)
2633 h = NULL;
2634 else
2635 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2636
2637 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2638 This shows up in particular in an R_PPC_ADDR32 in the eabi
2639 startup code. */
2640 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2641 {
2642 if (htab->got == NULL)
2643 {
2644 if (htab->elf.dynobj == NULL)
2645 htab->elf.dynobj = abfd;
2646 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2647 return FALSE;
2648 }
2649 }
2650
2651 r_type = ELF32_R_TYPE (rel->r_info);
2652 switch (r_type)
2653 {
2654 case R_PPC_GOT_TLSLD16:
2655 case R_PPC_GOT_TLSLD16_LO:
2656 case R_PPC_GOT_TLSLD16_HI:
2657 case R_PPC_GOT_TLSLD16_HA:
2658 htab->tlsld_got.refcount += 1;
2659 tls_type = TLS_TLS | TLS_LD;
2660 goto dogottls;
2661
2662 case R_PPC_GOT_TLSGD16:
2663 case R_PPC_GOT_TLSGD16_LO:
2664 case R_PPC_GOT_TLSGD16_HI:
2665 case R_PPC_GOT_TLSGD16_HA:
2666 tls_type = TLS_TLS | TLS_GD;
2667 goto dogottls;
2668
2669 case R_PPC_GOT_TPREL16:
2670 case R_PPC_GOT_TPREL16_LO:
2671 case R_PPC_GOT_TPREL16_HI:
2672 case R_PPC_GOT_TPREL16_HA:
2673 if (info->shared)
2674 info->flags |= DF_STATIC_TLS;
2675 tls_type = TLS_TLS | TLS_TPREL;
2676 goto dogottls;
2677
2678 case R_PPC_GOT_DTPREL16:
2679 case R_PPC_GOT_DTPREL16_LO:
2680 case R_PPC_GOT_DTPREL16_HI:
2681 case R_PPC_GOT_DTPREL16_HA:
2682 tls_type = TLS_TLS | TLS_DTPREL;
2683 dogottls:
2684 sec->has_tls_reloc = 1;
2685 /* Fall thru */
2686
2687 /* GOT16 relocations */
2688 case R_PPC_GOT16:
2689 case R_PPC_GOT16_LO:
2690 case R_PPC_GOT16_HI:
2691 case R_PPC_GOT16_HA:
2692 /* This symbol requires a global offset table entry. */
2693 if (htab->got == NULL)
2694 {
2695 if (htab->elf.dynobj == NULL)
2696 htab->elf.dynobj = abfd;
2697 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2698 return FALSE;
2699 }
2700 if (h != NULL)
2701 {
2702 h->got.refcount += 1;
2703 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
2704 }
2705 else
2706 /* This is a global offset table entry for a local symbol. */
2707 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
2708 return FALSE;
2709 break;
2710
2711 /* Indirect .sdata relocation. */
2712 case R_PPC_EMB_SDAI16:
2713 if (info->shared)
2714 {
2715 bad_shared_reloc (abfd, r_type);
2716 return FALSE;
2717 }
2718 if (htab->sdata[0].section == NULL
2719 && !ppc_elf_create_linker_section (abfd, info, 0,
2720 &htab->sdata[0]))
2721 return FALSE;
2722 if (!elf_create_pointer_linker_section (abfd, info,
2723 &htab->sdata[0], h, rel))
2724 return FALSE;
2725 break;
2726
2727 /* Indirect .sdata2 relocation. */
2728 case R_PPC_EMB_SDA2I16:
2729 if (info->shared)
2730 {
2731 bad_shared_reloc (abfd, r_type);
2732 return FALSE;
2733 }
2734 if (htab->sdata[1].section == NULL
2735 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2736 &htab->sdata[1]))
2737 return FALSE;
2738 if (!elf_create_pointer_linker_section (abfd, info,
2739 &htab->sdata[1], h, rel))
2740 return FALSE;
2741 break;
2742
2743 case R_PPC_SDAREL16:
2744 case R_PPC_EMB_SDA2REL:
2745 case R_PPC_EMB_SDA21:
2746 case R_PPC_EMB_RELSDA:
2747 case R_PPC_EMB_NADDR32:
2748 case R_PPC_EMB_NADDR16:
2749 case R_PPC_EMB_NADDR16_LO:
2750 case R_PPC_EMB_NADDR16_HI:
2751 case R_PPC_EMB_NADDR16_HA:
2752 if (info->shared)
2753 {
2754 bad_shared_reloc (abfd, r_type);
2755 return FALSE;
2756 }
2757 break;
2758
2759 case R_PPC_PLT32:
2760 case R_PPC_PLTREL24:
2761 case R_PPC_PLTREL32:
2762 case R_PPC_PLT16_LO:
2763 case R_PPC_PLT16_HI:
2764 case R_PPC_PLT16_HA:
2765 #ifdef DEBUG
2766 fprintf (stderr, "Reloc requires a PLT entry\n");
2767 #endif
2768 /* This symbol requires a procedure linkage table entry. We
2769 actually build the entry in finish_dynamic_symbol,
2770 because this might be a case of linking PIC code without
2771 linking in any dynamic objects, in which case we don't
2772 need to generate a procedure linkage table after all. */
2773
2774 if (h == NULL)
2775 {
2776 /* It does not make sense to have a procedure linkage
2777 table entry for a local symbol. */
2778 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
2779 "local symbol"),
2780 abfd,
2781 sec,
2782 (long) rel->r_offset,
2783 ppc_elf_howto_table[r_type]->name);
2784 bfd_set_error (bfd_error_bad_value);
2785 return FALSE;
2786 }
2787
2788 h->needs_plt = 1;
2789 h->plt.refcount++;
2790 break;
2791
2792 /* The following relocations don't need to propagate the
2793 relocation if linking a shared object since they are
2794 section relative. */
2795 case R_PPC_SECTOFF:
2796 case R_PPC_SECTOFF_LO:
2797 case R_PPC_SECTOFF_HI:
2798 case R_PPC_SECTOFF_HA:
2799 case R_PPC_DTPREL16:
2800 case R_PPC_DTPREL16_LO:
2801 case R_PPC_DTPREL16_HI:
2802 case R_PPC_DTPREL16_HA:
2803 case R_PPC_TOC16:
2804 break;
2805
2806 /* This are just markers. */
2807 case R_PPC_TLS:
2808 case R_PPC_EMB_MRKREF:
2809 case R_PPC_NONE:
2810 case R_PPC_max:
2811 break;
2812
2813 /* These should only appear in dynamic objects. */
2814 case R_PPC_COPY:
2815 case R_PPC_GLOB_DAT:
2816 case R_PPC_JMP_SLOT:
2817 case R_PPC_RELATIVE:
2818 break;
2819
2820 /* These aren't handled yet. We'll report an error later. */
2821 case R_PPC_ADDR30:
2822 case R_PPC_EMB_RELSEC16:
2823 case R_PPC_EMB_RELST_LO:
2824 case R_PPC_EMB_RELST_HI:
2825 case R_PPC_EMB_RELST_HA:
2826 case R_PPC_EMB_BIT_FLD:
2827 break;
2828
2829 /* This refers only to functions defined in the shared library. */
2830 case R_PPC_LOCAL24PC:
2831 break;
2832
2833 /* This relocation describes the C++ object vtable hierarchy.
2834 Reconstruct it for later use during GC. */
2835 case R_PPC_GNU_VTINHERIT:
2836 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2837 return FALSE;
2838 break;
2839
2840 /* This relocation describes which C++ vtable entries are actually
2841 used. Record for later use during GC. */
2842 case R_PPC_GNU_VTENTRY:
2843 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2844 return FALSE;
2845 break;
2846
2847 /* We shouldn't really be seeing these. */
2848 case R_PPC_TPREL32:
2849 if (info->shared)
2850 info->flags |= DF_STATIC_TLS;
2851 goto dodyn;
2852
2853 /* Nor these. */
2854 case R_PPC_DTPMOD32:
2855 case R_PPC_DTPREL32:
2856 goto dodyn;
2857
2858 case R_PPC_TPREL16:
2859 case R_PPC_TPREL16_LO:
2860 case R_PPC_TPREL16_HI:
2861 case R_PPC_TPREL16_HA:
2862 if (info->shared)
2863 info->flags |= DF_STATIC_TLS;
2864 goto dodyn;
2865
2866 /* When creating a shared object, we must copy these
2867 relocs into the output file. We create a reloc
2868 section in dynobj and make room for the reloc. */
2869 case R_PPC_REL24:
2870 case R_PPC_REL14:
2871 case R_PPC_REL14_BRTAKEN:
2872 case R_PPC_REL14_BRNTAKEN:
2873 case R_PPC_REL32:
2874 if (h == NULL
2875 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2876 break;
2877 /* fall through */
2878
2879 case R_PPC_ADDR32:
2880 case R_PPC_ADDR24:
2881 case R_PPC_ADDR16:
2882 case R_PPC_ADDR16_LO:
2883 case R_PPC_ADDR16_HI:
2884 case R_PPC_ADDR16_HA:
2885 case R_PPC_ADDR14:
2886 case R_PPC_ADDR14_BRTAKEN:
2887 case R_PPC_ADDR14_BRNTAKEN:
2888 case R_PPC_UADDR32:
2889 case R_PPC_UADDR16:
2890 if (h != NULL && !info->shared)
2891 {
2892 /* We may need a plt entry if the symbol turns out to be
2893 a function defined in a dynamic object. */
2894 h->plt.refcount++;
2895
2896 /* We may need a copy reloc too. */
2897 h->non_got_ref = 1;
2898 }
2899
2900 dodyn:
2901 /* If we are creating a shared library, and this is a reloc
2902 against a global symbol, or a non PC relative reloc
2903 against a local symbol, then we need to copy the reloc
2904 into the shared library. However, if we are linking with
2905 -Bsymbolic, we do not need to copy a reloc against a
2906 global symbol which is defined in an object we are
2907 including in the link (i.e., DEF_REGULAR is set). At
2908 this point we have not seen all the input files, so it is
2909 possible that DEF_REGULAR is not set now but will be set
2910 later (it is never cleared). In case of a weak definition,
2911 DEF_REGULAR may be cleared later by a strong definition in
2912 a shared library. We account for that possibility below by
2913 storing information in the dyn_relocs field of the hash
2914 table entry. A similar situation occurs when creating
2915 shared libraries and symbol visibility changes render the
2916 symbol local.
2917
2918 If on the other hand, we are creating an executable, we
2919 may need to keep relocations for symbols satisfied by a
2920 dynamic library if we manage to avoid copy relocs for the
2921 symbol. */
2922 if ((info->shared
2923 && (MUST_BE_DYN_RELOC (r_type)
2924 || (h != NULL
2925 && (! info->symbolic
2926 || h->root.type == bfd_link_hash_defweak
2927 || !h->def_regular))))
2928 || (ELIMINATE_COPY_RELOCS
2929 && !info->shared
2930 && (sec->flags & SEC_ALLOC) != 0
2931 && h != NULL
2932 && (h->root.type == bfd_link_hash_defweak
2933 || !h->def_regular)))
2934 {
2935 struct ppc_elf_dyn_relocs *p;
2936 struct ppc_elf_dyn_relocs **head;
2937
2938 #ifdef DEBUG
2939 fprintf (stderr,
2940 "ppc_elf_check_relocs needs to "
2941 "create relocation for %s\n",
2942 (h && h->root.root.string
2943 ? h->root.root.string : "<unknown>"));
2944 #endif
2945 if (sreloc == NULL)
2946 {
2947 const char *name;
2948
2949 name = (bfd_elf_string_from_elf_section
2950 (abfd,
2951 elf_elfheader (abfd)->e_shstrndx,
2952 elf_section_data (sec)->rel_hdr.sh_name));
2953 if (name == NULL)
2954 return FALSE;
2955
2956 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2957 && strcmp (bfd_get_section_name (abfd, sec),
2958 name + 5) == 0);
2959
2960 if (htab->elf.dynobj == NULL)
2961 htab->elf.dynobj = abfd;
2962 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
2963 if (sreloc == NULL)
2964 {
2965 flagword flags;
2966
2967 sreloc = bfd_make_section (htab->elf.dynobj, name);
2968 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2969 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2970 if ((sec->flags & SEC_ALLOC) != 0)
2971 flags |= SEC_ALLOC | SEC_LOAD;
2972 if (sreloc == NULL
2973 || ! bfd_set_section_flags (htab->elf.dynobj,
2974 sreloc, flags)
2975 || ! bfd_set_section_alignment (htab->elf.dynobj,
2976 sreloc, 2))
2977 return FALSE;
2978 }
2979 elf_section_data (sec)->sreloc = sreloc;
2980 }
2981
2982 /* If this is a global symbol, we count the number of
2983 relocations we need for this symbol. */
2984 if (h != NULL)
2985 {
2986 head = &ppc_elf_hash_entry (h)->dyn_relocs;
2987 }
2988 else
2989 {
2990 /* Track dynamic relocs needed for local syms too.
2991 We really need local syms available to do this
2992 easily. Oh well. */
2993
2994 asection *s;
2995 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2996 sec, r_symndx);
2997 if (s == NULL)
2998 return FALSE;
2999
3000 head = ((struct ppc_elf_dyn_relocs **)
3001 &elf_section_data (s)->local_dynrel);
3002 }
3003
3004 p = *head;
3005 if (p == NULL || p->sec != sec)
3006 {
3007 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3008 if (p == NULL)
3009 return FALSE;
3010 p->next = *head;
3011 *head = p;
3012 p->sec = sec;
3013 p->count = 0;
3014 p->pc_count = 0;
3015 }
3016
3017 p->count += 1;
3018 if (!MUST_BE_DYN_RELOC (r_type))
3019 p->pc_count += 1;
3020 }
3021
3022 break;
3023 }
3024 }
3025
3026 return TRUE;
3027 }
3028 \f
3029 /* Merge backend specific data from an object file to the output
3030 object file when linking. */
3031
3032 static bfd_boolean
3033 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3034 {
3035 flagword old_flags;
3036 flagword new_flags;
3037 bfd_boolean error;
3038
3039 if (!is_ppc_elf_target (ibfd->xvec)
3040 || !is_ppc_elf_target (obfd->xvec))
3041 return TRUE;
3042
3043 /* Check if we have the same endianess. */
3044 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3045 return FALSE;
3046
3047 new_flags = elf_elfheader (ibfd)->e_flags;
3048 old_flags = elf_elfheader (obfd)->e_flags;
3049 if (!elf_flags_init (obfd))
3050 {
3051 /* First call, no flags set. */
3052 elf_flags_init (obfd) = TRUE;
3053 elf_elfheader (obfd)->e_flags = new_flags;
3054 }
3055
3056 /* Compatible flags are ok. */
3057 else if (new_flags == old_flags)
3058 ;
3059
3060 /* Incompatible flags. */
3061 else
3062 {
3063 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3064 to be linked with either. */
3065 error = FALSE;
3066 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3067 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3068 {
3069 error = TRUE;
3070 (*_bfd_error_handler)
3071 (_("%B: compiled with -mrelocatable and linked with "
3072 "modules compiled normally"), ibfd);
3073 }
3074 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3075 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3076 {
3077 error = TRUE;
3078 (*_bfd_error_handler)
3079 (_("%B: compiled normally and linked with "
3080 "modules compiled with -mrelocatable"), ibfd);
3081 }
3082
3083 /* The output is -mrelocatable-lib iff both the input files are. */
3084 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3085 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3086
3087 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3088 but each input file is either -mrelocatable or -mrelocatable-lib. */
3089 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3090 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3091 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3092 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3093
3094 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3095 any module uses it. */
3096 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3097
3098 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3099 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3100
3101 /* Warn about any other mismatches. */
3102 if (new_flags != old_flags)
3103 {
3104 error = TRUE;
3105 (*_bfd_error_handler)
3106 (_("%B: uses different e_flags (0x%lx) fields "
3107 "than previous modules (0x%lx)"),
3108 ibfd, (long) new_flags, (long) old_flags);
3109 }
3110
3111 if (error)
3112 {
3113 bfd_set_error (bfd_error_bad_value);
3114 return FALSE;
3115 }
3116 }
3117
3118 return TRUE;
3119 }
3120 \f
3121 /* Return the section that should be marked against GC for a given
3122 relocation. */
3123
3124 static asection *
3125 ppc_elf_gc_mark_hook (asection *sec,
3126 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3127 Elf_Internal_Rela *rel,
3128 struct elf_link_hash_entry *h,
3129 Elf_Internal_Sym *sym)
3130 {
3131 if (h != NULL)
3132 {
3133 switch (ELF32_R_TYPE (rel->r_info))
3134 {
3135 case R_PPC_GNU_VTINHERIT:
3136 case R_PPC_GNU_VTENTRY:
3137 break;
3138
3139 default:
3140 switch (h->root.type)
3141 {
3142 case bfd_link_hash_defined:
3143 case bfd_link_hash_defweak:
3144 return h->root.u.def.section;
3145
3146 case bfd_link_hash_common:
3147 return h->root.u.c.p->section;
3148
3149 default:
3150 break;
3151 }
3152 }
3153 }
3154 else
3155 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3156
3157 return NULL;
3158 }
3159
3160 /* Update the got, plt and dynamic reloc reference counts for the
3161 section being removed. */
3162
3163 static bfd_boolean
3164 ppc_elf_gc_sweep_hook (bfd *abfd,
3165 struct bfd_link_info *info,
3166 asection *sec,
3167 const Elf_Internal_Rela *relocs)
3168 {
3169 struct ppc_elf_link_hash_table *htab;
3170 Elf_Internal_Shdr *symtab_hdr;
3171 struct elf_link_hash_entry **sym_hashes;
3172 bfd_signed_vma *local_got_refcounts;
3173 const Elf_Internal_Rela *rel, *relend;
3174
3175 elf_section_data (sec)->local_dynrel = NULL;
3176
3177 htab = ppc_elf_hash_table (info);
3178 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3179 sym_hashes = elf_sym_hashes (abfd);
3180 local_got_refcounts = elf_local_got_refcounts (abfd);
3181
3182 relend = relocs + sec->reloc_count;
3183 for (rel = relocs; rel < relend; rel++)
3184 {
3185 unsigned long r_symndx;
3186 enum elf_ppc_reloc_type r_type;
3187 struct elf_link_hash_entry *h = NULL;
3188
3189 r_symndx = ELF32_R_SYM (rel->r_info);
3190 if (r_symndx >= symtab_hdr->sh_info)
3191 {
3192 struct ppc_elf_dyn_relocs **pp, *p;
3193 struct ppc_elf_link_hash_entry *eh;
3194
3195 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3196 while (h->root.type == bfd_link_hash_indirect
3197 || h->root.type == bfd_link_hash_warning)
3198 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3199 eh = (struct ppc_elf_link_hash_entry *) h;
3200
3201 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3202 if (p->sec == sec)
3203 {
3204 /* Everything must go for SEC. */
3205 *pp = p->next;
3206 break;
3207 }
3208 }
3209
3210 r_type = ELF32_R_TYPE (rel->r_info);
3211 switch (r_type)
3212 {
3213 case R_PPC_GOT_TLSLD16:
3214 case R_PPC_GOT_TLSLD16_LO:
3215 case R_PPC_GOT_TLSLD16_HI:
3216 case R_PPC_GOT_TLSLD16_HA:
3217 htab->tlsld_got.refcount -= 1;
3218 /* Fall thru */
3219
3220 case R_PPC_GOT_TLSGD16:
3221 case R_PPC_GOT_TLSGD16_LO:
3222 case R_PPC_GOT_TLSGD16_HI:
3223 case R_PPC_GOT_TLSGD16_HA:
3224 case R_PPC_GOT_TPREL16:
3225 case R_PPC_GOT_TPREL16_LO:
3226 case R_PPC_GOT_TPREL16_HI:
3227 case R_PPC_GOT_TPREL16_HA:
3228 case R_PPC_GOT_DTPREL16:
3229 case R_PPC_GOT_DTPREL16_LO:
3230 case R_PPC_GOT_DTPREL16_HI:
3231 case R_PPC_GOT_DTPREL16_HA:
3232 case R_PPC_GOT16:
3233 case R_PPC_GOT16_LO:
3234 case R_PPC_GOT16_HI:
3235 case R_PPC_GOT16_HA:
3236 if (h != NULL)
3237 {
3238 if (h->got.refcount > 0)
3239 h->got.refcount--;
3240 }
3241 else if (local_got_refcounts != NULL)
3242 {
3243 if (local_got_refcounts[r_symndx] > 0)
3244 local_got_refcounts[r_symndx]--;
3245 }
3246 break;
3247
3248 case R_PPC_REL24:
3249 case R_PPC_REL14:
3250 case R_PPC_REL14_BRTAKEN:
3251 case R_PPC_REL14_BRNTAKEN:
3252 case R_PPC_REL32:
3253 if (h == NULL
3254 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3255 break;
3256 /* Fall thru */
3257
3258 case R_PPC_ADDR32:
3259 case R_PPC_ADDR24:
3260 case R_PPC_ADDR16:
3261 case R_PPC_ADDR16_LO:
3262 case R_PPC_ADDR16_HI:
3263 case R_PPC_ADDR16_HA:
3264 case R_PPC_ADDR14:
3265 case R_PPC_ADDR14_BRTAKEN:
3266 case R_PPC_ADDR14_BRNTAKEN:
3267 case R_PPC_UADDR32:
3268 case R_PPC_UADDR16:
3269 case R_PPC_PLT32:
3270 case R_PPC_PLTREL24:
3271 case R_PPC_PLT16_LO:
3272 case R_PPC_PLT16_HI:
3273 case R_PPC_PLT16_HA:
3274 if (h != NULL)
3275 {
3276 if (h->plt.refcount > 0)
3277 h->plt.refcount--;
3278 }
3279 break;
3280
3281 default:
3282 break;
3283 }
3284 }
3285 return TRUE;
3286 }
3287 \f
3288 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3289
3290 asection *
3291 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3292 {
3293 struct ppc_elf_link_hash_table *htab;
3294
3295 htab = ppc_elf_hash_table (info);
3296 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3297 FALSE, FALSE, TRUE);
3298
3299 return _bfd_elf_tls_setup (obfd, info);
3300 }
3301
3302 /* Run through all the TLS relocs looking for optimization
3303 opportunities. */
3304
3305 bfd_boolean
3306 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3307 struct bfd_link_info *info)
3308 {
3309 bfd *ibfd;
3310 asection *sec;
3311 struct ppc_elf_link_hash_table *htab;
3312
3313 if (info->relocatable || info->shared)
3314 return TRUE;
3315
3316 htab = ppc_elf_hash_table (info);
3317 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3318 {
3319 Elf_Internal_Sym *locsyms = NULL;
3320 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3321
3322 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3323 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3324 {
3325 Elf_Internal_Rela *relstart, *rel, *relend;
3326 int expecting_tls_get_addr;
3327
3328 /* Read the relocations. */
3329 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3330 info->keep_memory);
3331 if (relstart == NULL)
3332 return FALSE;
3333
3334 expecting_tls_get_addr = 0;
3335 relend = relstart + sec->reloc_count;
3336 for (rel = relstart; rel < relend; rel++)
3337 {
3338 enum elf_ppc_reloc_type r_type;
3339 unsigned long r_symndx;
3340 struct elf_link_hash_entry *h = NULL;
3341 char *tls_mask;
3342 char tls_set, tls_clear;
3343 bfd_boolean is_local;
3344
3345 r_symndx = ELF32_R_SYM (rel->r_info);
3346 if (r_symndx >= symtab_hdr->sh_info)
3347 {
3348 struct elf_link_hash_entry **sym_hashes;
3349
3350 sym_hashes = elf_sym_hashes (ibfd);
3351 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3352 while (h->root.type == bfd_link_hash_indirect
3353 || h->root.type == bfd_link_hash_warning)
3354 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3355 }
3356
3357 is_local = FALSE;
3358 if (h == NULL
3359 || !h->def_dynamic)
3360 is_local = TRUE;
3361
3362 r_type = ELF32_R_TYPE (rel->r_info);
3363 switch (r_type)
3364 {
3365 case R_PPC_GOT_TLSLD16:
3366 case R_PPC_GOT_TLSLD16_LO:
3367 case R_PPC_GOT_TLSLD16_HI:
3368 case R_PPC_GOT_TLSLD16_HA:
3369 /* These relocs should never be against a symbol
3370 defined in a shared lib. Leave them alone if
3371 that turns out to be the case. */
3372 expecting_tls_get_addr = 0;
3373 htab->tlsld_got.refcount -= 1;
3374 if (!is_local)
3375 continue;
3376
3377 /* LD -> LE */
3378 tls_set = 0;
3379 tls_clear = TLS_LD;
3380 expecting_tls_get_addr = 1;
3381 break;
3382
3383 case R_PPC_GOT_TLSGD16:
3384 case R_PPC_GOT_TLSGD16_LO:
3385 case R_PPC_GOT_TLSGD16_HI:
3386 case R_PPC_GOT_TLSGD16_HA:
3387 if (is_local)
3388 /* GD -> LE */
3389 tls_set = 0;
3390 else
3391 /* GD -> IE */
3392 tls_set = TLS_TLS | TLS_TPRELGD;
3393 tls_clear = TLS_GD;
3394 expecting_tls_get_addr = 1;
3395 break;
3396
3397 case R_PPC_GOT_TPREL16:
3398 case R_PPC_GOT_TPREL16_LO:
3399 case R_PPC_GOT_TPREL16_HI:
3400 case R_PPC_GOT_TPREL16_HA:
3401 expecting_tls_get_addr = 0;
3402 if (is_local)
3403 {
3404 /* IE -> LE */
3405 tls_set = 0;
3406 tls_clear = TLS_TPREL;
3407 break;
3408 }
3409 else
3410 continue;
3411
3412 case R_PPC_REL14:
3413 case R_PPC_REL14_BRTAKEN:
3414 case R_PPC_REL14_BRNTAKEN:
3415 case R_PPC_REL24:
3416 if (expecting_tls_get_addr
3417 && h != NULL
3418 && h == htab->tls_get_addr)
3419 {
3420 if (h->plt.refcount > 0)
3421 h->plt.refcount -= 1;
3422 }
3423 expecting_tls_get_addr = 0;
3424 continue;
3425
3426 default:
3427 expecting_tls_get_addr = 0;
3428 continue;
3429 }
3430
3431 if (h != NULL)
3432 {
3433 if (tls_set == 0)
3434 {
3435 /* We managed to get rid of a got entry. */
3436 if (h->got.refcount > 0)
3437 h->got.refcount -= 1;
3438 }
3439 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3440 }
3441 else
3442 {
3443 Elf_Internal_Sym *sym;
3444 bfd_signed_vma *lgot_refs;
3445 char *lgot_masks;
3446
3447 if (locsyms == NULL)
3448 {
3449 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3450 if (locsyms == NULL)
3451 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3452 symtab_hdr->sh_info,
3453 0, NULL, NULL, NULL);
3454 if (locsyms == NULL)
3455 {
3456 if (elf_section_data (sec)->relocs != relstart)
3457 free (relstart);
3458 return FALSE;
3459 }
3460 }
3461 sym = locsyms + r_symndx;
3462 lgot_refs = elf_local_got_refcounts (ibfd);
3463 if (lgot_refs == NULL)
3464 abort ();
3465 if (tls_set == 0)
3466 {
3467 /* We managed to get rid of a got entry. */
3468 if (lgot_refs[r_symndx] > 0)
3469 lgot_refs[r_symndx] -= 1;
3470 }
3471 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3472 tls_mask = &lgot_masks[r_symndx];
3473 }
3474
3475 *tls_mask |= tls_set;
3476 *tls_mask &= ~tls_clear;
3477 }
3478
3479 if (elf_section_data (sec)->relocs != relstart)
3480 free (relstart);
3481 }
3482
3483 if (locsyms != NULL
3484 && (symtab_hdr->contents != (unsigned char *) locsyms))
3485 {
3486 if (!info->keep_memory)
3487 free (locsyms);
3488 else
3489 symtab_hdr->contents = (unsigned char *) locsyms;
3490 }
3491 }
3492 return TRUE;
3493 }
3494 \f
3495 /* Adjust a symbol defined by a dynamic object and referenced by a
3496 regular object. The current definition is in some section of the
3497 dynamic object, but we're not including those sections. We have to
3498 change the definition to something the rest of the link can
3499 understand. */
3500
3501 static bfd_boolean
3502 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3503 struct elf_link_hash_entry *h)
3504 {
3505 struct ppc_elf_link_hash_table *htab;
3506 asection *s;
3507 unsigned int power_of_two;
3508
3509 #ifdef DEBUG
3510 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3511 h->root.root.string);
3512 #endif
3513
3514 /* Make sure we know what is going on here. */
3515 htab = ppc_elf_hash_table (info);
3516 BFD_ASSERT (htab->elf.dynobj != NULL
3517 && (h->needs_plt
3518 || h->u.weakdef != NULL
3519 || (h->def_dynamic
3520 && h->ref_regular
3521 && !h->def_regular)));
3522
3523 /* Deal with function syms. */
3524 if (h->type == STT_FUNC
3525 || h->needs_plt)
3526 {
3527 /* Clear procedure linkage table information for any symbol that
3528 won't need a .plt entry. */
3529 if (h->plt.refcount <= 0
3530 || SYMBOL_CALLS_LOCAL (info, h)
3531 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3532 && h->root.type == bfd_link_hash_undefweak))
3533 {
3534 /* A PLT entry is not required/allowed when:
3535
3536 1. We are not using ld.so; because then the PLT entry
3537 can't be set up, so we can't use one. In this case,
3538 ppc_elf_adjust_dynamic_symbol won't even be called.
3539
3540 2. GC has rendered the entry unused.
3541
3542 3. We know for certain that a call to this symbol
3543 will go to this object, or will remain undefined. */
3544 h->plt.offset = (bfd_vma) -1;
3545 h->needs_plt = 0;
3546 }
3547 return TRUE;
3548 }
3549 else
3550 h->plt.offset = (bfd_vma) -1;
3551
3552 /* If this is a weak symbol, and there is a real definition, the
3553 processor independent code will have arranged for us to see the
3554 real definition first, and we can just use the same value. */
3555 if (h->u.weakdef != NULL)
3556 {
3557 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3558 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3559 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3560 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3561 if (ELIMINATE_COPY_RELOCS)
3562 h->non_got_ref = h->u.weakdef->non_got_ref;
3563 return TRUE;
3564 }
3565
3566 /* This is a reference to a symbol defined by a dynamic object which
3567 is not a function. */
3568
3569 /* If we are creating a shared library, we must presume that the
3570 only references to the symbol are via the global offset table.
3571 For such cases we need not do anything here; the relocations will
3572 be handled correctly by relocate_section. */
3573 if (info->shared)
3574 return TRUE;
3575
3576 /* If there are no references to this symbol that do not use the
3577 GOT, we don't need to generate a copy reloc. */
3578 if (!h->non_got_ref)
3579 return TRUE;
3580
3581 if (ELIMINATE_COPY_RELOCS)
3582 {
3583 struct ppc_elf_dyn_relocs *p;
3584 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3585 {
3586 s = p->sec->output_section;
3587 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3588 break;
3589 }
3590
3591 /* If we didn't find any dynamic relocs in read-only sections, then
3592 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3593 if (p == NULL)
3594 {
3595 h->non_got_ref = 0;
3596 return TRUE;
3597 }
3598 }
3599
3600 /* We must allocate the symbol in our .dynbss section, which will
3601 become part of the .bss section of the executable. There will be
3602 an entry for this symbol in the .dynsym section. The dynamic
3603 object will contain position independent code, so all references
3604 from the dynamic object to this symbol will go through the global
3605 offset table. The dynamic linker will use the .dynsym entry to
3606 determine the address it must put in the global offset table, so
3607 both the dynamic object and the regular object will refer to the
3608 same memory location for the variable.
3609
3610 Of course, if the symbol is sufficiently small, we must instead
3611 allocate it in .sbss. FIXME: It would be better to do this if and
3612 only if there were actually SDAREL relocs for that symbol. */
3613
3614 if (h->size <= elf_gp_size (htab->elf.dynobj))
3615 s = htab->dynsbss;
3616 else
3617 s = htab->dynbss;
3618 BFD_ASSERT (s != NULL);
3619
3620 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3621 copy the initial value out of the dynamic object and into the
3622 runtime process image. We need to remember the offset into the
3623 .rela.bss section we are going to use. */
3624 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3625 {
3626 asection *srel;
3627
3628 if (h->size <= elf_gp_size (htab->elf.dynobj))
3629 srel = htab->relsbss;
3630 else
3631 srel = htab->relbss;
3632 BFD_ASSERT (srel != NULL);
3633 srel->size += sizeof (Elf32_External_Rela);
3634 h->needs_copy = 1;
3635 }
3636
3637 /* We need to figure out the alignment required for this symbol. I
3638 have no idea how ELF linkers handle this. */
3639 power_of_two = bfd_log2 (h->size);
3640 if (power_of_two > 4)
3641 power_of_two = 4;
3642
3643 /* Apply the required alignment. */
3644 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
3645 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3646 {
3647 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3648 return FALSE;
3649 }
3650
3651 /* Define the symbol as being at this point in the section. */
3652 h->root.u.def.section = s;
3653 h->root.u.def.value = s->size;
3654
3655 /* Increment the section size to make room for the symbol. */
3656 s->size += h->size;
3657
3658 return TRUE;
3659 }
3660 \f
3661 /* Allocate space in associated reloc sections for dynamic relocs. */
3662
3663 static bfd_boolean
3664 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3665 {
3666 struct bfd_link_info *info = inf;
3667 struct ppc_elf_link_hash_entry *eh;
3668 struct ppc_elf_link_hash_table *htab;
3669 struct ppc_elf_dyn_relocs *p;
3670
3671 if (h->root.type == bfd_link_hash_indirect)
3672 return TRUE;
3673
3674 if (h->root.type == bfd_link_hash_warning)
3675 /* When warning symbols are created, they **replace** the "real"
3676 entry in the hash table, thus we never get to see the real
3677 symbol in a hash traversal. So look at it now. */
3678 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3679
3680 htab = ppc_elf_hash_table (info);
3681 if (htab->elf.dynamic_sections_created
3682 && h->plt.refcount > 0)
3683 {
3684 /* Make sure this symbol is output as a dynamic symbol. */
3685 if (h->dynindx == -1
3686 && !h->forced_local)
3687 {
3688 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3689 return FALSE;
3690 }
3691
3692 if (info->shared
3693 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3694 {
3695 asection *s = htab->plt;
3696
3697 /* If this is the first .plt entry, make room for the special
3698 first entry. */
3699 if (s->size == 0)
3700 s->size += PLT_INITIAL_ENTRY_SIZE;
3701
3702 /* The PowerPC PLT is actually composed of two parts, the
3703 first part is 2 words (for a load and a jump), and then
3704 there is a remaining word available at the end. */
3705 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3706 + (PLT_SLOT_SIZE
3707 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3708 / PLT_ENTRY_SIZE)));
3709
3710 /* If this symbol is not defined in a regular file, and we
3711 are not generating a shared library, then set the symbol
3712 to this location in the .plt. This is required to make
3713 function pointers compare as equal between the normal
3714 executable and the shared library. */
3715 if (! info->shared
3716 && !h->def_regular)
3717 {
3718 h->root.u.def.section = s;
3719 h->root.u.def.value = h->plt.offset;
3720 }
3721
3722 /* Make room for this entry. After the 8192nd entry, room
3723 for two entries is allocated. */
3724 s->size += PLT_ENTRY_SIZE;
3725 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3726 > PLT_NUM_SINGLE_ENTRIES)
3727 s->size += PLT_ENTRY_SIZE;
3728
3729 /* We also need to make an entry in the .rela.plt section. */
3730 htab->relplt->size += sizeof (Elf32_External_Rela);
3731 }
3732 else
3733 {
3734 h->plt.offset = (bfd_vma) -1;
3735 h->needs_plt = 0;
3736 }
3737 }
3738 else
3739 {
3740 h->plt.offset = (bfd_vma) -1;
3741 h->needs_plt = 0;
3742 }
3743
3744 eh = (struct ppc_elf_link_hash_entry *) h;
3745 if (eh->elf.got.refcount > 0)
3746 {
3747 /* Make sure this symbol is output as a dynamic symbol. */
3748 if (eh->elf.dynindx == -1
3749 && !eh->elf.forced_local)
3750 {
3751 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3752 return FALSE;
3753 }
3754
3755 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3756 && !eh->elf.def_dynamic)
3757 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3758 eh->elf.got.offset = (bfd_vma) -1;
3759 else
3760 {
3761 bfd_boolean dyn;
3762 eh->elf.got.offset = htab->got->size;
3763 if ((eh->tls_mask & TLS_TLS) != 0)
3764 {
3765 if ((eh->tls_mask & TLS_LD) != 0)
3766 htab->got->size += 8;
3767 if ((eh->tls_mask & TLS_GD) != 0)
3768 htab->got->size += 8;
3769 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3770 htab->got->size += 4;
3771 if ((eh->tls_mask & TLS_DTPREL) != 0)
3772 htab->got->size += 4;
3773 }
3774 else
3775 htab->got->size += 4;
3776 dyn = htab->elf.dynamic_sections_created;
3777 if ((info->shared
3778 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3779 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3780 || eh->elf.root.type != bfd_link_hash_undefweak))
3781 {
3782 /* All the entries we allocated need relocs. */
3783 htab->relgot->size
3784 += ((htab->got->size - eh->elf.got.offset) / 4
3785 * sizeof (Elf32_External_Rela));
3786 /* Except LD only needs one. */
3787 if ((eh->tls_mask & TLS_LD) != 0)
3788 htab->relgot->size -= sizeof (Elf32_External_Rela);
3789 }
3790 }
3791 }
3792 else
3793 eh->elf.got.offset = (bfd_vma) -1;
3794
3795 if (eh->dyn_relocs == NULL)
3796 return TRUE;
3797
3798 /* In the shared -Bsymbolic case, discard space allocated for
3799 dynamic pc-relative relocs against symbols which turn out to be
3800 defined in regular objects. For the normal shared case, discard
3801 space for relocs that have become local due to symbol visibility
3802 changes. */
3803
3804 if (info->shared)
3805 {
3806 /* Relocs that use pc_count are those that appear on a call insn,
3807 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3808 generated via assembly. We want calls to protected symbols to
3809 resolve directly to the function rather than going via the plt.
3810 If people want function pointer comparisons to work as expected
3811 then they should avoid writing weird assembly. */
3812 if (SYMBOL_CALLS_LOCAL (info, h))
3813 {
3814 struct ppc_elf_dyn_relocs **pp;
3815
3816 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3817 {
3818 p->count -= p->pc_count;
3819 p->pc_count = 0;
3820 if (p->count == 0)
3821 *pp = p->next;
3822 else
3823 pp = &p->next;
3824 }
3825 }
3826
3827 /* Also discard relocs on undefined weak syms with non-default
3828 visibility. */
3829 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3830 && h->root.type == bfd_link_hash_undefweak)
3831 eh->dyn_relocs = NULL;
3832
3833 /* Make sure undefined weak symbols are output as a dynamic symbol
3834 in PIEs. */
3835 if (info->pie
3836 && eh->dyn_relocs != NULL
3837 && h->dynindx == -1
3838 && h->root.type == bfd_link_hash_undefweak
3839 && !h->forced_local)
3840 {
3841 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3842 return FALSE;
3843 }
3844 }
3845 else if (ELIMINATE_COPY_RELOCS)
3846 {
3847 /* For the non-shared case, discard space for relocs against
3848 symbols which turn out to need copy relocs or are not
3849 dynamic. */
3850
3851 if (!h->non_got_ref
3852 && h->def_dynamic
3853 && !h->def_regular)
3854 {
3855 /* Make sure this symbol is output as a dynamic symbol.
3856 Undefined weak syms won't yet be marked as dynamic. */
3857 if (h->dynindx == -1
3858 && !h->forced_local)
3859 {
3860 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3861 return FALSE;
3862 }
3863
3864 /* If that succeeded, we know we'll be keeping all the
3865 relocs. */
3866 if (h->dynindx != -1)
3867 goto keep;
3868 }
3869
3870 eh->dyn_relocs = NULL;
3871
3872 keep: ;
3873 }
3874
3875 /* Finally, allocate space. */
3876 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3877 {
3878 asection *sreloc = elf_section_data (p->sec)->sreloc;
3879 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3880 }
3881
3882 return TRUE;
3883 }
3884
3885 /* Find any dynamic relocs that apply to read-only sections. */
3886
3887 static bfd_boolean
3888 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3889 {
3890 struct ppc_elf_dyn_relocs *p;
3891
3892 if (h->root.type == bfd_link_hash_indirect)
3893 return TRUE;
3894
3895 if (h->root.type == bfd_link_hash_warning)
3896 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3897
3898 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3899 {
3900 asection *s = p->sec->output_section;
3901
3902 if (s != NULL
3903 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3904 == (SEC_READONLY | SEC_ALLOC)))
3905 {
3906 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3907
3908 /* Not an error, just cut short the traversal. */
3909 return FALSE;
3910 }
3911 }
3912 return TRUE;
3913 }
3914
3915 /* Set the sizes of the dynamic sections. */
3916
3917 static bfd_boolean
3918 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3919 struct bfd_link_info *info)
3920 {
3921 struct ppc_elf_link_hash_table *htab;
3922 asection *s;
3923 bfd_boolean relocs;
3924 bfd *ibfd;
3925
3926 #ifdef DEBUG
3927 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3928 #endif
3929
3930 htab = ppc_elf_hash_table (info);
3931 BFD_ASSERT (htab->elf.dynobj != NULL);
3932
3933 if (elf_hash_table (info)->dynamic_sections_created)
3934 {
3935 /* Set the contents of the .interp section to the interpreter. */
3936 if (info->executable)
3937 {
3938 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3939 BFD_ASSERT (s != NULL);
3940 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3941 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3942 }
3943 }
3944
3945 if (htab->tlsld_got.refcount > 0)
3946 {
3947 htab->tlsld_got.offset = htab->got->size;
3948 htab->got->size += 8;
3949 if (info->shared)
3950 htab->relgot->size += sizeof (Elf32_External_Rela);
3951 }
3952 else
3953 htab->tlsld_got.offset = (bfd_vma) -1;
3954
3955 /* Set up .got offsets for local syms, and space for local dynamic
3956 relocs. */
3957 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3958 {
3959 bfd_signed_vma *local_got;
3960 bfd_signed_vma *end_local_got;
3961 char *lgot_masks;
3962 bfd_size_type locsymcount;
3963 Elf_Internal_Shdr *symtab_hdr;
3964 asection *srel;
3965
3966 if (!is_ppc_elf_target (ibfd->xvec))
3967 continue;
3968
3969 for (s = ibfd->sections; s != NULL; s = s->next)
3970 {
3971 struct ppc_elf_dyn_relocs *p;
3972
3973 for (p = ((struct ppc_elf_dyn_relocs *)
3974 elf_section_data (s)->local_dynrel);
3975 p != NULL;
3976 p = p->next)
3977 {
3978 if (!bfd_is_abs_section (p->sec)
3979 && bfd_is_abs_section (p->sec->output_section))
3980 {
3981 /* Input section has been discarded, either because
3982 it is a copy of a linkonce section or due to
3983 linker script /DISCARD/, so we'll be discarding
3984 the relocs too. */
3985 }
3986 else if (p->count != 0)
3987 {
3988 elf_section_data (p->sec)->sreloc->size
3989 += p->count * sizeof (Elf32_External_Rela);
3990 if ((p->sec->output_section->flags
3991 & (SEC_READONLY | SEC_ALLOC))
3992 == (SEC_READONLY | SEC_ALLOC))
3993 info->flags |= DF_TEXTREL;
3994 }
3995 }
3996 }
3997
3998 local_got = elf_local_got_refcounts (ibfd);
3999 if (!local_got)
4000 continue;
4001
4002 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4003 locsymcount = symtab_hdr->sh_info;
4004 end_local_got = local_got + locsymcount;
4005 lgot_masks = (char *) end_local_got;
4006 s = htab->got;
4007 srel = htab->relgot;
4008 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4009 if (*local_got > 0)
4010 {
4011 if (*lgot_masks == (TLS_TLS | TLS_LD))
4012 {
4013 /* If just an LD reloc, we'll just use
4014 htab->tlsld_got.offset. */
4015 if (htab->tlsld_got.offset == (bfd_vma) -1)
4016 {
4017 htab->tlsld_got.offset = s->size;
4018 s->size += 8;
4019 if (info->shared)
4020 srel->size += sizeof (Elf32_External_Rela);
4021 }
4022 *local_got = (bfd_vma) -1;
4023 }
4024 else
4025 {
4026 *local_got = s->size;
4027 if ((*lgot_masks & TLS_TLS) != 0)
4028 {
4029 if ((*lgot_masks & TLS_GD) != 0)
4030 s->size += 8;
4031 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4032 s->size += 4;
4033 if ((*lgot_masks & TLS_DTPREL) != 0)
4034 s->size += 4;
4035 }
4036 else
4037 s->size += 4;
4038 if (info->shared)
4039 srel->size += ((s->size - *local_got) / 4
4040 * sizeof (Elf32_External_Rela));
4041 }
4042 }
4043 else
4044 *local_got = (bfd_vma) -1;
4045 }
4046
4047 /* Allocate space for global sym dynamic relocs. */
4048 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4049
4050 /* We've now determined the sizes of the various dynamic sections.
4051 Allocate memory for them. */
4052 relocs = FALSE;
4053 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4054 {
4055 if ((s->flags & SEC_LINKER_CREATED) == 0)
4056 continue;
4057
4058 if (s == htab->plt
4059 || s == htab->got
4060 || s == htab->sbss)
4061 {
4062 /* Strip this section if we don't need it; see the
4063 comment below. */
4064 }
4065 else if (s == htab->sdata[0].section
4066 || s == htab->sdata[1].section)
4067 {
4068 /* Strip these too. */
4069 }
4070 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4071 {
4072 if (s->size == 0)
4073 {
4074 /* If we don't need this section, strip it from the
4075 output file. This is mostly to handle .rela.bss and
4076 .rela.plt. We must create both sections in
4077 create_dynamic_sections, because they must be created
4078 before the linker maps input sections to output
4079 sections. The linker does that before
4080 adjust_dynamic_symbol is called, and it is that
4081 function which decides whether anything needs to go
4082 into these sections. */
4083 }
4084 else
4085 {
4086 /* Remember whether there are any relocation sections. */
4087 relocs = TRUE;
4088
4089 /* We use the reloc_count field as a counter if we need
4090 to copy relocs into the output file. */
4091 s->reloc_count = 0;
4092 }
4093 }
4094 else
4095 {
4096 /* It's not one of our sections, so don't allocate space. */
4097 continue;
4098 }
4099
4100 if (s->size == 0)
4101 {
4102 _bfd_strip_section_from_output (info, s);
4103 continue;
4104 }
4105
4106 if (s == htab->sbss)
4107 continue;
4108
4109 /* Allocate memory for the section contents. */
4110 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4111 if (s->contents == NULL)
4112 return FALSE;
4113 }
4114
4115 if (htab->elf.dynamic_sections_created)
4116 {
4117 /* Add some entries to the .dynamic section. We fill in the
4118 values later, in ppc_elf_finish_dynamic_sections, but we
4119 must add the entries now so that we get the correct size for
4120 the .dynamic section. The DT_DEBUG entry is filled in by the
4121 dynamic linker and used by the debugger. */
4122 #define add_dynamic_entry(TAG, VAL) \
4123 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4124
4125 if (info->executable)
4126 {
4127 if (!add_dynamic_entry (DT_DEBUG, 0))
4128 return FALSE;
4129 }
4130
4131 if (htab->plt != NULL && htab->plt->size != 0)
4132 {
4133 if (!add_dynamic_entry (DT_PLTGOT, 0)
4134 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4135 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4136 || !add_dynamic_entry (DT_JMPREL, 0))
4137 return FALSE;
4138 }
4139
4140 if (relocs)
4141 {
4142 if (!add_dynamic_entry (DT_RELA, 0)
4143 || !add_dynamic_entry (DT_RELASZ, 0)
4144 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4145 return FALSE;
4146 }
4147
4148 /* If any dynamic relocs apply to a read-only section, then we
4149 need a DT_TEXTREL entry. */
4150 if ((info->flags & DF_TEXTREL) == 0)
4151 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4152 info);
4153
4154 if ((info->flags & DF_TEXTREL) != 0)
4155 {
4156 if (!add_dynamic_entry (DT_TEXTREL, 0))
4157 return FALSE;
4158 }
4159 }
4160 #undef add_dynamic_entry
4161
4162 return TRUE;
4163 }
4164 \f
4165 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4166
4167 static const int shared_stub_entry[] =
4168 {
4169 0x7c0802a6, /* mflr 0 */
4170 0x429f0005, /* bcl 20, 31, .Lxxx */
4171 0x7d6802a6, /* mflr 11 */
4172 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4173 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4174 0x7c0803a6, /* mtlr 0 */
4175 0x7d6903a6, /* mtctr 11 */
4176 0x4e800420, /* bctr */
4177 };
4178
4179 static const int stub_entry[] =
4180 {
4181 0x3d600000, /* lis 11,xxx@ha */
4182 0x396b0000, /* addi 11,11,xxx@l */
4183 0x7d6903a6, /* mtctr 11 */
4184 0x4e800420, /* bctr */
4185 };
4186
4187 static bfd_boolean
4188 ppc_elf_relax_section (bfd *abfd,
4189 asection *isec,
4190 struct bfd_link_info *link_info,
4191 bfd_boolean *again)
4192 {
4193 struct one_fixup
4194 {
4195 struct one_fixup *next;
4196 asection *tsec;
4197 bfd_vma toff;
4198 bfd_vma trampoff;
4199 };
4200
4201 Elf_Internal_Shdr *symtab_hdr;
4202 bfd_byte *contents = NULL;
4203 Elf_Internal_Sym *isymbuf = NULL;
4204 Elf_Internal_Rela *internal_relocs = NULL;
4205 Elf_Internal_Rela *irel, *irelend;
4206 struct one_fixup *fixups = NULL;
4207 bfd_boolean changed;
4208 struct ppc_elf_link_hash_table *ppc_info;
4209 bfd_size_type trampoff;
4210
4211 *again = FALSE;
4212
4213 /* Nothing to do if there are no relocations. */
4214 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
4215 return TRUE;
4216
4217 trampoff = (isec->size + 3) & (bfd_vma) -4;
4218 /* Space for a branch around any trampolines. */
4219 trampoff += 4;
4220
4221 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4222
4223 /* Get a copy of the native relocations. */
4224 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4225 link_info->keep_memory);
4226 if (internal_relocs == NULL)
4227 goto error_return;
4228
4229 ppc_info = ppc_elf_hash_table (link_info);
4230 irelend = internal_relocs + isec->reloc_count;
4231
4232 for (irel = internal_relocs; irel < irelend; irel++)
4233 {
4234 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4235 bfd_vma symaddr, reladdr, toff, roff;
4236 asection *tsec;
4237 struct one_fixup *f;
4238 size_t insn_offset = 0;
4239 bfd_vma max_branch_offset, val;
4240 bfd_byte *hit_addr;
4241 unsigned long t0;
4242 unsigned char sym_type;
4243
4244 switch (r_type)
4245 {
4246 case R_PPC_REL24:
4247 case R_PPC_LOCAL24PC:
4248 case R_PPC_PLTREL24:
4249 max_branch_offset = 1 << 25;
4250 break;
4251
4252 case R_PPC_REL14:
4253 case R_PPC_REL14_BRTAKEN:
4254 case R_PPC_REL14_BRNTAKEN:
4255 max_branch_offset = 1 << 15;
4256 break;
4257
4258 default:
4259 continue;
4260 }
4261
4262 /* Get the value of the symbol referred to by the reloc. */
4263 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4264 {
4265 /* A local symbol. */
4266 Elf_Internal_Sym *isym;
4267
4268 /* Read this BFD's local symbols. */
4269 if (isymbuf == NULL)
4270 {
4271 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4272 if (isymbuf == NULL)
4273 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4274 symtab_hdr->sh_info, 0,
4275 NULL, NULL, NULL);
4276 if (isymbuf == 0)
4277 goto error_return;
4278 }
4279 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4280 if (isym->st_shndx == SHN_UNDEF)
4281 continue; /* We can't do anything with undefined symbols. */
4282 else if (isym->st_shndx == SHN_ABS)
4283 tsec = bfd_abs_section_ptr;
4284 else if (isym->st_shndx == SHN_COMMON)
4285 tsec = bfd_com_section_ptr;
4286 else
4287 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4288
4289 toff = isym->st_value;
4290 sym_type = ELF_ST_TYPE (isym->st_info);
4291 }
4292 else
4293 {
4294 /* Global symbol handling. */
4295 unsigned long indx;
4296 struct elf_link_hash_entry *h;
4297
4298 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4299 h = elf_sym_hashes (abfd)[indx];
4300
4301 while (h->root.type == bfd_link_hash_indirect
4302 || h->root.type == bfd_link_hash_warning)
4303 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4304
4305 if (r_type == R_PPC_PLTREL24
4306 && ppc_info->plt != NULL
4307 && h->plt.offset != (bfd_vma) -1)
4308 {
4309 tsec = ppc_info->plt;
4310 toff = h->plt.offset;
4311 }
4312 else if (h->root.type == bfd_link_hash_defined
4313 || h->root.type == bfd_link_hash_defweak)
4314 {
4315 tsec = h->root.u.def.section;
4316 toff = h->root.u.def.value;
4317 }
4318 else
4319 continue;
4320
4321 sym_type = h->type;
4322 }
4323
4324 /* If the branch and target are in the same section, you have
4325 no hope of adding stubs. We'll error out later should the
4326 branch overflow. */
4327 if (tsec == isec)
4328 continue;
4329
4330 /* There probably isn't any reason to handle symbols in
4331 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
4332 attribute for a code section, and we are only looking at
4333 branches. However, implement it correctly here as a
4334 reference for other target relax_section functions. */
4335 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
4336 {
4337 /* At this stage in linking, no SEC_MERGE symbol has been
4338 adjusted, so all references to such symbols need to be
4339 passed through _bfd_merged_section_offset. (Later, in
4340 relocate_section, all SEC_MERGE symbols *except* for
4341 section symbols have been adjusted.)
4342
4343 gas may reduce relocations against symbols in SEC_MERGE
4344 sections to a relocation against the section symbol when
4345 the original addend was zero. When the reloc is against
4346 a section symbol we should include the addend in the
4347 offset passed to _bfd_merged_section_offset, since the
4348 location of interest is the original symbol. On the
4349 other hand, an access to "sym+addend" where "sym" is not
4350 a section symbol should not include the addend; Such an
4351 access is presumed to be an offset from "sym"; The
4352 location of interest is just "sym". */
4353 if (sym_type == STT_SECTION)
4354 toff += irel->r_addend;
4355
4356 toff = _bfd_merged_section_offset (abfd, &tsec,
4357 elf_section_data (tsec)->sec_info,
4358 toff);
4359
4360 if (sym_type != STT_SECTION)
4361 toff += irel->r_addend;
4362 }
4363 else
4364 toff += irel->r_addend;
4365
4366 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
4367
4368 roff = irel->r_offset;
4369 reladdr = isec->output_section->vma + isec->output_offset + roff;
4370
4371 /* If the branch is in range, no need to do anything. */
4372 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
4373 continue;
4374
4375 /* Look for an existing fixup to this address. */
4376 for (f = fixups; f ; f = f->next)
4377 if (f->tsec == tsec && f->toff == toff)
4378 break;
4379
4380 if (f == NULL)
4381 {
4382 size_t size;
4383 unsigned long stub_rtype;
4384
4385 val = trampoff - roff;
4386 if (val >= max_branch_offset)
4387 /* Oh dear, we can't reach a trampoline. Don't try to add
4388 one. We'll report an error later. */
4389 continue;
4390
4391 if (link_info->shared)
4392 {
4393 size = 4 * ARRAY_SIZE (shared_stub_entry);
4394 insn_offset = 12;
4395 stub_rtype = R_PPC_RELAX32PC;
4396 }
4397 else
4398 {
4399 size = 4 * ARRAY_SIZE (stub_entry);
4400 insn_offset = 0;
4401 stub_rtype = R_PPC_RELAX32;
4402 }
4403
4404 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
4405 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
4406 abort ();
4407 if (tsec == ppc_info->plt)
4408 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
4409
4410 /* Hijack the old relocation. Since we need two
4411 relocations for this use a "composite" reloc. */
4412 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4413 stub_rtype);
4414 irel->r_offset = trampoff + insn_offset;
4415
4416 /* Record the fixup so we don't do it again this section. */
4417 f = bfd_malloc (sizeof (*f));
4418 f->next = fixups;
4419 f->tsec = tsec;
4420 f->toff = toff;
4421 f->trampoff = trampoff;
4422 fixups = f;
4423
4424 trampoff += size;
4425 }
4426 else
4427 {
4428 val = f->trampoff - roff;
4429 if (val >= max_branch_offset)
4430 continue;
4431
4432 /* Nop out the reloc, since we're finalizing things here. */
4433 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
4434 }
4435
4436 /* Get the section contents. */
4437 if (contents == NULL)
4438 {
4439 /* Get cached copy if it exists. */
4440 if (elf_section_data (isec)->this_hdr.contents != NULL)
4441 contents = elf_section_data (isec)->this_hdr.contents;
4442 else
4443 {
4444 /* Go get them off disk. */
4445 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
4446 goto error_return;
4447 }
4448 }
4449
4450 /* Fix up the existing branch to hit the trampoline. */
4451 hit_addr = contents + roff;
4452 switch (r_type)
4453 {
4454 case R_PPC_REL24:
4455 case R_PPC_LOCAL24PC:
4456 case R_PPC_PLTREL24:
4457 t0 = bfd_get_32 (abfd, hit_addr);
4458 t0 &= ~0x3fffffc;
4459 t0 |= val & 0x3fffffc;
4460 bfd_put_32 (abfd, t0, hit_addr);
4461 break;
4462
4463 case R_PPC_REL14:
4464 case R_PPC_REL14_BRTAKEN:
4465 case R_PPC_REL14_BRNTAKEN:
4466 t0 = bfd_get_32 (abfd, hit_addr);
4467 t0 &= ~0xfffc;
4468 t0 |= val & 0xfffc;
4469 bfd_put_32 (abfd, t0, hit_addr);
4470 break;
4471 }
4472 }
4473
4474 /* Write out the trampolines. */
4475 changed = fixups != NULL;
4476 if (fixups != NULL)
4477 {
4478 const int *stub;
4479 bfd_byte *dest;
4480 bfd_vma val;
4481 int i, size;
4482
4483 do
4484 {
4485 struct one_fixup *f = fixups;
4486 fixups = fixups->next;
4487 free (f);
4488 }
4489 while (fixups);
4490
4491 contents = bfd_realloc (contents, trampoff);
4492 if (contents == NULL)
4493 goto error_return;
4494
4495 isec->size = (isec->size + 3) & (bfd_vma) -4;
4496 /* Branch around the trampolines. */
4497 val = trampoff - isec->size + 0x48000000;
4498 dest = contents + isec->size;
4499 isec->size = trampoff;
4500 bfd_put_32 (abfd, val, dest);
4501 dest += 4;
4502
4503 if (link_info->shared)
4504 {
4505 stub = shared_stub_entry;
4506 size = ARRAY_SIZE (shared_stub_entry);
4507 }
4508 else
4509 {
4510 stub = stub_entry;
4511 size = ARRAY_SIZE (stub_entry);
4512 }
4513
4514 i = 0;
4515 while (dest < contents + trampoff)
4516 {
4517 bfd_put_32 (abfd, stub[i], dest);
4518 i++;
4519 if (i == size)
4520 i = 0;
4521 dest += 4;
4522 }
4523 BFD_ASSERT (i == 0);
4524 }
4525
4526 if (isymbuf != NULL
4527 && symtab_hdr->contents != (unsigned char *) isymbuf)
4528 {
4529 if (! link_info->keep_memory)
4530 free (isymbuf);
4531 else
4532 {
4533 /* Cache the symbols for elf_link_input_bfd. */
4534 symtab_hdr->contents = (unsigned char *) isymbuf;
4535 }
4536 }
4537
4538 if (contents != NULL
4539 && elf_section_data (isec)->this_hdr.contents != contents)
4540 {
4541 if (!changed && !link_info->keep_memory)
4542 free (contents);
4543 else
4544 {
4545 /* Cache the section contents for elf_link_input_bfd. */
4546 elf_section_data (isec)->this_hdr.contents = contents;
4547 }
4548 }
4549
4550 if (elf_section_data (isec)->relocs != internal_relocs)
4551 {
4552 if (!changed)
4553 free (internal_relocs);
4554 else
4555 elf_section_data (isec)->relocs = internal_relocs;
4556 }
4557
4558 *again = changed;
4559 return TRUE;
4560
4561 error_return:
4562 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
4563 free (isymbuf);
4564 if (contents != NULL
4565 && elf_section_data (isec)->this_hdr.contents != contents)
4566 free (contents);
4567 if (internal_relocs != NULL
4568 && elf_section_data (isec)->relocs != internal_relocs)
4569 free (internal_relocs);
4570 return FALSE;
4571 }
4572 \f
4573 /* Set _SDA_BASE_ and _SDA2_BASE. */
4574
4575 bfd_boolean
4576 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
4577 {
4578 struct ppc_elf_link_hash_table *htab;
4579 unsigned i;
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 asection *s;
4587 bfd_vma val;
4588 struct elf_link_hash_entry *h;
4589
4590 s = lsect->section;
4591 if (s != NULL)
4592 s = s->output_section;
4593 if (s == NULL)
4594 s = bfd_get_section_by_name (obfd, lsect->name);
4595 if (s == NULL)
4596 s = bfd_get_section_by_name (obfd, lsect->bss_name);
4597
4598 val = 0;
4599 if (s != NULL)
4600 val = s->vma + 32768;
4601 lsect->sym_val = val;
4602
4603 h = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
4604 FALSE, FALSE, FALSE);
4605 if (h != NULL && h->root.type == bfd_link_hash_undefined)
4606 {
4607 h->root.type = bfd_link_hash_defined;
4608 h->root.u.def.section = bfd_abs_section_ptr;
4609 h->root.u.def.value = val;
4610 h->def_regular = 1;
4611 h->type = STT_OBJECT;
4612 h->other = STV_HIDDEN;
4613 }
4614 }
4615 return TRUE;
4616 }
4617 \f
4618 #define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
4619
4620 /* Fill in the address for a pointer generated in a linker section. */
4621
4622 static bfd_vma
4623 elf_finish_pointer_linker_section (bfd *output_bfd,
4624 bfd *input_bfd,
4625 struct bfd_link_info *info,
4626 elf_linker_section_t *lsect,
4627 struct elf_link_hash_entry *h,
4628 bfd_vma relocation,
4629 const Elf_Internal_Rela *rel)
4630 {
4631 elf_linker_section_pointers_t *linker_section_ptr;
4632
4633 BFD_ASSERT (lsect != NULL);
4634
4635 if (h != NULL)
4636 {
4637 /* Handle global symbol. */
4638 struct ppc_elf_link_hash_entry *eh;
4639
4640 eh = (struct ppc_elf_link_hash_entry *) h;
4641 linker_section_ptr
4642 = elf_find_pointer_linker_section (eh->linker_section_pointer,
4643 rel->r_addend,
4644 lsect);
4645
4646 BFD_ASSERT (linker_section_ptr != NULL);
4647
4648 if (! elf_hash_table (info)->dynamic_sections_created
4649 || (info->shared
4650 && info->symbolic
4651 && h->def_regular))
4652 {
4653 /* This is actually a static link, or it is a
4654 -Bsymbolic link and the symbol is defined
4655 locally. We must initialize this entry in the
4656 global section.
4657
4658 When doing a dynamic link, we create a .rela.<xxx>
4659 relocation entry to initialize the value. This
4660 is done in the finish_dynamic_symbol routine. */
4661 if (!linker_section_ptr->written_address_p)
4662 {
4663 linker_section_ptr->written_address_p = TRUE;
4664 bfd_put_ptr (output_bfd,
4665 relocation + linker_section_ptr->addend,
4666 (lsect->section->contents
4667 + linker_section_ptr->offset));
4668 }
4669 }
4670 }
4671 else
4672 {
4673 /* Handle local symbol. */
4674 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
4675 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
4676 BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
4677 linker_section_ptr = (elf_find_pointer_linker_section
4678 (elf_local_ptr_offsets (input_bfd)[r_symndx],
4679 rel->r_addend,
4680 lsect));
4681
4682 BFD_ASSERT (linker_section_ptr != NULL);
4683
4684 /* Write out pointer if it hasn't been rewritten out before. */
4685 if (!linker_section_ptr->written_address_p)
4686 {
4687 linker_section_ptr->written_address_p = TRUE;
4688 bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
4689 lsect->section->contents + linker_section_ptr->offset);
4690 }
4691 }
4692
4693 relocation = (lsect->section->output_offset
4694 + linker_section_ptr->offset
4695 - 0x8000);
4696
4697 #ifdef DEBUG
4698 fprintf (stderr,
4699 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
4700 lsect->name, (long) relocation, (long) relocation);
4701 #endif
4702
4703 /* Subtract out the addend, because it will get added back in by the normal
4704 processing. */
4705 return relocation - linker_section_ptr->addend;
4706 }
4707
4708 /* The RELOCATE_SECTION function is called by the ELF backend linker
4709 to handle the relocations for a section.
4710
4711 The relocs are always passed as Rela structures; if the section
4712 actually uses Rel structures, the r_addend field will always be
4713 zero.
4714
4715 This function is responsible for adjust the section contents as
4716 necessary, and (if using Rela relocs and generating a
4717 relocatable output file) adjusting the reloc addend as
4718 necessary.
4719
4720 This function does not have to worry about setting the reloc
4721 address or the reloc symbol index.
4722
4723 LOCAL_SYMS is a pointer to the swapped in local symbols.
4724
4725 LOCAL_SECTIONS is an array giving the section in the input file
4726 corresponding to the st_shndx field of each local symbol.
4727
4728 The global hash table entry for the global symbols can be found
4729 via elf_sym_hashes (input_bfd).
4730
4731 When generating relocatable output, this function must handle
4732 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4733 going to be the section symbol corresponding to the output
4734 section, which means that the addend must be adjusted
4735 accordingly. */
4736
4737 static bfd_boolean
4738 ppc_elf_relocate_section (bfd *output_bfd,
4739 struct bfd_link_info *info,
4740 bfd *input_bfd,
4741 asection *input_section,
4742 bfd_byte *contents,
4743 Elf_Internal_Rela *relocs,
4744 Elf_Internal_Sym *local_syms,
4745 asection **local_sections)
4746 {
4747 Elf_Internal_Shdr *symtab_hdr;
4748 struct elf_link_hash_entry **sym_hashes;
4749 struct ppc_elf_link_hash_table *htab;
4750 Elf_Internal_Rela *rel;
4751 Elf_Internal_Rela *relend;
4752 Elf_Internal_Rela outrel;
4753 bfd_byte *loc;
4754 asection *sreloc = NULL;
4755 bfd_vma *local_got_offsets;
4756 bfd_boolean ret = TRUE;
4757
4758 #ifdef DEBUG
4759 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4760 "%ld relocations%s",
4761 input_bfd, input_section,
4762 (long) input_section->reloc_count,
4763 (info->relocatable) ? " (relocatable)" : "");
4764 #endif
4765
4766 if (info->relocatable)
4767 return TRUE;
4768
4769 /* Initialize howto table if not already done. */
4770 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4771 ppc_elf_howto_init ();
4772
4773 htab = ppc_elf_hash_table (info);
4774 local_got_offsets = elf_local_got_offsets (input_bfd);
4775 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4776 sym_hashes = elf_sym_hashes (input_bfd);
4777 rel = relocs;
4778 relend = relocs + input_section->reloc_count;
4779 for (; rel < relend; rel++)
4780 {
4781 enum elf_ppc_reloc_type r_type;
4782 bfd_vma addend;
4783 bfd_reloc_status_type r;
4784 Elf_Internal_Sym *sym;
4785 asection *sec;
4786 struct elf_link_hash_entry *h;
4787 const char *sym_name;
4788 reloc_howto_type *howto;
4789 unsigned long r_symndx;
4790 bfd_vma relocation;
4791 bfd_vma branch_bit, insn, from;
4792 bfd_boolean unresolved_reloc;
4793 bfd_boolean warned;
4794 unsigned int tls_type, tls_mask, tls_gd;
4795
4796 r_type = ELF32_R_TYPE (rel->r_info);
4797 sym = NULL;
4798 sec = NULL;
4799 h = NULL;
4800 unresolved_reloc = FALSE;
4801 warned = FALSE;
4802 r_symndx = ELF32_R_SYM (rel->r_info);
4803
4804 if (r_symndx < symtab_hdr->sh_info)
4805 {
4806 sym = local_syms + r_symndx;
4807 sec = local_sections[r_symndx];
4808 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
4809
4810 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4811 }
4812 else
4813 {
4814 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4815 r_symndx, symtab_hdr, sym_hashes,
4816 h, sec, relocation,
4817 unresolved_reloc, warned);
4818
4819 sym_name = h->root.root.string;
4820 }
4821
4822 /* TLS optimizations. Replace instruction sequences and relocs
4823 based on information we collected in tls_optimize. We edit
4824 RELOCS so that --emit-relocs will output something sensible
4825 for the final instruction stream. */
4826 tls_mask = 0;
4827 tls_gd = 0;
4828 if (IS_PPC_TLS_RELOC (r_type))
4829 {
4830 if (h != NULL)
4831 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4832 else if (local_got_offsets != NULL)
4833 {
4834 char *lgot_masks;
4835 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4836 tls_mask = lgot_masks[r_symndx];
4837 }
4838 }
4839
4840 /* Ensure reloc mapping code below stays sane. */
4841 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4842 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4843 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4844 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4845 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4846 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4847 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4848 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4849 abort ();
4850 switch (r_type)
4851 {
4852 default:
4853 break;
4854
4855 case R_PPC_GOT_TPREL16:
4856 case R_PPC_GOT_TPREL16_LO:
4857 if (tls_mask != 0
4858 && (tls_mask & TLS_TPREL) == 0)
4859 {
4860 bfd_vma insn;
4861 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4862 insn &= 31 << 21;
4863 insn |= 0x3c020000; /* addis 0,2,0 */
4864 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4865 r_type = R_PPC_TPREL16_HA;
4866 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4867 }
4868 break;
4869
4870 case R_PPC_TLS:
4871 if (tls_mask != 0
4872 && (tls_mask & TLS_TPREL) == 0)
4873 {
4874 bfd_vma insn, rtra;
4875 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4876 if ((insn & ((31 << 26) | (31 << 11)))
4877 == ((31 << 26) | (2 << 11)))
4878 rtra = insn & ((1 << 26) - (1 << 16));
4879 else if ((insn & ((31 << 26) | (31 << 16)))
4880 == ((31 << 26) | (2 << 16)))
4881 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4882 else
4883 abort ();
4884 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4885 /* add -> addi. */
4886 insn = 14 << 26;
4887 else if ((insn & (31 << 1)) == 23 << 1
4888 && ((insn & (31 << 6)) < 14 << 6
4889 || ((insn & (31 << 6)) >= 16 << 6
4890 && (insn & (31 << 6)) < 24 << 6)))
4891 /* load and store indexed -> dform. */
4892 insn = (32 | ((insn >> 6) & 31)) << 26;
4893 else if ((insn & (31 << 1)) == 21 << 1
4894 && (insn & (0x1a << 6)) == 0)
4895 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4896 insn = (((58 | ((insn >> 6) & 4)) << 26)
4897 | ((insn >> 6) & 1));
4898 else if ((insn & (31 << 1)) == 21 << 1
4899 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4900 /* lwax -> lwa. */
4901 insn = (58 << 26) | 2;
4902 else
4903 abort ();
4904 insn |= rtra;
4905 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4906 r_type = R_PPC_TPREL16_LO;
4907 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4908 /* Was PPC_TLS which sits on insn boundary, now
4909 PPC_TPREL16_LO which is at insn+2. */
4910 rel->r_offset += 2;
4911 }
4912 break;
4913
4914 case R_PPC_GOT_TLSGD16_HI:
4915 case R_PPC_GOT_TLSGD16_HA:
4916 tls_gd = TLS_TPRELGD;
4917 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4918 goto tls_gdld_hi;
4919 break;
4920
4921 case R_PPC_GOT_TLSLD16_HI:
4922 case R_PPC_GOT_TLSLD16_HA:
4923 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4924 {
4925 tls_gdld_hi:
4926 if ((tls_mask & tls_gd) != 0)
4927 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4928 + R_PPC_GOT_TPREL16);
4929 else
4930 {
4931 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4932 rel->r_offset -= 2;
4933 r_type = R_PPC_NONE;
4934 }
4935 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4936 }
4937 break;
4938
4939 case R_PPC_GOT_TLSGD16:
4940 case R_PPC_GOT_TLSGD16_LO:
4941 tls_gd = TLS_TPRELGD;
4942 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4943 goto tls_get_addr_check;
4944 break;
4945
4946 case R_PPC_GOT_TLSLD16:
4947 case R_PPC_GOT_TLSLD16_LO:
4948 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4949 {
4950 tls_get_addr_check:
4951 if (rel + 1 < relend)
4952 {
4953 enum elf_ppc_reloc_type r_type2;
4954 unsigned long r_symndx2;
4955 struct elf_link_hash_entry *h2;
4956 bfd_vma insn1, insn2;
4957 bfd_vma offset;
4958
4959 /* The next instruction should be a call to
4960 __tls_get_addr. Peek at the reloc to be sure. */
4961 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4962 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4963 if (r_symndx2 < symtab_hdr->sh_info
4964 || (r_type2 != R_PPC_REL14
4965 && r_type2 != R_PPC_REL14_BRTAKEN
4966 && r_type2 != R_PPC_REL14_BRNTAKEN
4967 && r_type2 != R_PPC_REL24
4968 && r_type2 != R_PPC_PLTREL24))
4969 break;
4970
4971 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4972 while (h2->root.type == bfd_link_hash_indirect
4973 || h2->root.type == bfd_link_hash_warning)
4974 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4975 if (h2 == NULL || h2 != htab->tls_get_addr)
4976 break;
4977
4978 /* OK, it checks out. Replace the call. */
4979 offset = rel[1].r_offset;
4980 insn1 = bfd_get_32 (output_bfd,
4981 contents + rel->r_offset - 2);
4982 if ((tls_mask & tls_gd) != 0)
4983 {
4984 /* IE */
4985 insn1 &= (1 << 26) - 1;
4986 insn1 |= 32 << 26; /* lwz */
4987 insn2 = 0x7c631214; /* add 3,3,2 */
4988 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4989 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4990 + R_PPC_GOT_TPREL16);
4991 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4992 }
4993 else
4994 {
4995 /* LE */
4996 insn1 = 0x3c620000; /* addis 3,2,0 */
4997 insn2 = 0x38630000; /* addi 3,3,0 */
4998 if (tls_gd == 0)
4999 {
5000 /* Was an LD reloc. */
5001 r_symndx = 0;
5002 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5003 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5004 }
5005 r_type = R_PPC_TPREL16_HA;
5006 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5007 rel[1].r_info = ELF32_R_INFO (r_symndx,
5008 R_PPC_TPREL16_LO);
5009 rel[1].r_offset += 2;
5010 }
5011 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5012 bfd_put_32 (output_bfd, insn2, contents + offset);
5013 if (tls_gd == 0)
5014 {
5015 /* We changed the symbol on an LD reloc. Start over
5016 in order to get h, sym, sec etc. right. */
5017 rel--;
5018 continue;
5019 }
5020 }
5021 }
5022 break;
5023 }
5024
5025 /* Handle other relocations that tweak non-addend part of insn. */
5026 branch_bit = 0;
5027 switch (r_type)
5028 {
5029 default:
5030 break;
5031
5032 /* Branch taken prediction relocations. */
5033 case R_PPC_ADDR14_BRTAKEN:
5034 case R_PPC_REL14_BRTAKEN:
5035 branch_bit = BRANCH_PREDICT_BIT;
5036 /* Fall thru */
5037
5038 /* Branch not taken prediction relocations. */
5039 case R_PPC_ADDR14_BRNTAKEN:
5040 case R_PPC_REL14_BRNTAKEN:
5041 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5042 insn &= ~BRANCH_PREDICT_BIT;
5043 insn |= branch_bit;
5044
5045 from = (rel->r_offset
5046 + input_section->output_offset
5047 + input_section->output_section->vma);
5048
5049 /* Invert 'y' bit if not the default. */
5050 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5051 insn ^= BRANCH_PREDICT_BIT;
5052
5053 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5054 break;
5055 }
5056
5057 addend = rel->r_addend;
5058 tls_type = 0;
5059 howto = NULL;
5060 if (r_type < R_PPC_max)
5061 howto = ppc_elf_howto_table[r_type];
5062 switch (r_type)
5063 {
5064 default:
5065 (*_bfd_error_handler)
5066 (_("%B: unknown relocation type %d for symbol %s"),
5067 input_bfd, (int) r_type, sym_name);
5068
5069 bfd_set_error (bfd_error_bad_value);
5070 ret = FALSE;
5071 continue;
5072
5073 case R_PPC_NONE:
5074 case R_PPC_TLS:
5075 case R_PPC_EMB_MRKREF:
5076 case R_PPC_GNU_VTINHERIT:
5077 case R_PPC_GNU_VTENTRY:
5078 continue;
5079
5080 /* GOT16 relocations. Like an ADDR16 using the symbol's
5081 address in the GOT as relocation value instead of the
5082 symbol's value itself. Also, create a GOT entry for the
5083 symbol and put the symbol value there. */
5084 case R_PPC_GOT_TLSGD16:
5085 case R_PPC_GOT_TLSGD16_LO:
5086 case R_PPC_GOT_TLSGD16_HI:
5087 case R_PPC_GOT_TLSGD16_HA:
5088 tls_type = TLS_TLS | TLS_GD;
5089 goto dogot;
5090
5091 case R_PPC_GOT_TLSLD16:
5092 case R_PPC_GOT_TLSLD16_LO:
5093 case R_PPC_GOT_TLSLD16_HI:
5094 case R_PPC_GOT_TLSLD16_HA:
5095 tls_type = TLS_TLS | TLS_LD;
5096 goto dogot;
5097
5098 case R_PPC_GOT_TPREL16:
5099 case R_PPC_GOT_TPREL16_LO:
5100 case R_PPC_GOT_TPREL16_HI:
5101 case R_PPC_GOT_TPREL16_HA:
5102 tls_type = TLS_TLS | TLS_TPREL;
5103 goto dogot;
5104
5105 case R_PPC_GOT_DTPREL16:
5106 case R_PPC_GOT_DTPREL16_LO:
5107 case R_PPC_GOT_DTPREL16_HI:
5108 case R_PPC_GOT_DTPREL16_HA:
5109 tls_type = TLS_TLS | TLS_DTPREL;
5110 goto dogot;
5111
5112 case R_PPC_GOT16:
5113 case R_PPC_GOT16_LO:
5114 case R_PPC_GOT16_HI:
5115 case R_PPC_GOT16_HA:
5116 dogot:
5117 {
5118 /* Relocation is to the entry for this symbol in the global
5119 offset table. */
5120 bfd_vma off;
5121 bfd_vma *offp;
5122 unsigned long indx;
5123
5124 if (htab->got == NULL)
5125 abort ();
5126
5127 indx = 0;
5128 if (tls_type == (TLS_TLS | TLS_LD)
5129 && (h == NULL
5130 || !h->def_dynamic))
5131 offp = &htab->tlsld_got.offset;
5132 else if (h != NULL)
5133 {
5134 bfd_boolean dyn;
5135 dyn = htab->elf.dynamic_sections_created;
5136 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5137 || (info->shared
5138 && SYMBOL_REFERENCES_LOCAL (info, h)))
5139 /* This is actually a static link, or it is a
5140 -Bsymbolic link and the symbol is defined
5141 locally, or the symbol was forced to be local
5142 because of a version file. */
5143 ;
5144 else
5145 {
5146 indx = h->dynindx;
5147 unresolved_reloc = FALSE;
5148 }
5149 offp = &h->got.offset;
5150 }
5151 else
5152 {
5153 if (local_got_offsets == NULL)
5154 abort ();
5155 offp = &local_got_offsets[r_symndx];
5156 }
5157
5158 /* The offset must always be a multiple of 4. We use the
5159 least significant bit to record whether we have already
5160 processed this entry. */
5161 off = *offp;
5162 if ((off & 1) != 0)
5163 off &= ~1;
5164 else
5165 {
5166 unsigned int tls_m = (tls_mask
5167 & (TLS_LD | TLS_GD | TLS_DTPREL
5168 | TLS_TPREL | TLS_TPRELGD));
5169
5170 if (offp == &htab->tlsld_got.offset)
5171 tls_m = TLS_LD;
5172 else if (h == NULL
5173 || !h->def_dynamic)
5174 tls_m &= ~TLS_LD;
5175
5176 /* We might have multiple got entries for this sym.
5177 Initialize them all. */
5178 do
5179 {
5180 int tls_ty = 0;
5181
5182 if ((tls_m & TLS_LD) != 0)
5183 {
5184 tls_ty = TLS_TLS | TLS_LD;
5185 tls_m &= ~TLS_LD;
5186 }
5187 else if ((tls_m & TLS_GD) != 0)
5188 {
5189 tls_ty = TLS_TLS | TLS_GD;
5190 tls_m &= ~TLS_GD;
5191 }
5192 else if ((tls_m & TLS_DTPREL) != 0)
5193 {
5194 tls_ty = TLS_TLS | TLS_DTPREL;
5195 tls_m &= ~TLS_DTPREL;
5196 }
5197 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5198 {
5199 tls_ty = TLS_TLS | TLS_TPREL;
5200 tls_m = 0;
5201 }
5202
5203 /* Generate relocs for the dynamic linker. */
5204 if ((info->shared || indx != 0)
5205 && (h == NULL
5206 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5207 || h->root.type != bfd_link_hash_undefweak))
5208 {
5209 outrel.r_offset = (htab->got->output_section->vma
5210 + htab->got->output_offset
5211 + off);
5212 outrel.r_addend = 0;
5213 if (tls_ty & (TLS_LD | TLS_GD))
5214 {
5215 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5216 if (tls_ty == (TLS_TLS | TLS_GD))
5217 {
5218 loc = htab->relgot->contents;
5219 loc += (htab->relgot->reloc_count++
5220 * sizeof (Elf32_External_Rela));
5221 bfd_elf32_swap_reloca_out (output_bfd,
5222 &outrel, loc);
5223 outrel.r_offset += 4;
5224 outrel.r_info
5225 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5226 }
5227 }
5228 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5229 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5230 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5231 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5232 else if (indx == 0)
5233 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5234 else
5235 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5236 if (indx == 0)
5237 {
5238 outrel.r_addend += relocation;
5239 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5240 outrel.r_addend -= htab->elf.tls_sec->vma;
5241 }
5242 loc = htab->relgot->contents;
5243 loc += (htab->relgot->reloc_count++
5244 * sizeof (Elf32_External_Rela));
5245 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5246 }
5247
5248 /* Init the .got section contents if we're not
5249 emitting a reloc. */
5250 else
5251 {
5252 bfd_vma value = relocation;
5253
5254 if (tls_ty == (TLS_TLS | TLS_LD))
5255 value = 1;
5256 else if (tls_ty != 0)
5257 {
5258 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5259 if (tls_ty == (TLS_TLS | TLS_TPREL))
5260 value += DTP_OFFSET - TP_OFFSET;
5261
5262 if (tls_ty == (TLS_TLS | TLS_GD))
5263 {
5264 bfd_put_32 (output_bfd, value,
5265 htab->got->contents + off + 4);
5266 value = 1;
5267 }
5268 }
5269 bfd_put_32 (output_bfd, value,
5270 htab->got->contents + off);
5271 }
5272
5273 off += 4;
5274 if (tls_ty & (TLS_LD | TLS_GD))
5275 off += 4;
5276 }
5277 while (tls_m != 0);
5278
5279 off = *offp;
5280 *offp = off | 1;
5281 }
5282
5283 if (off >= (bfd_vma) -2)
5284 abort ();
5285
5286 if ((tls_type & TLS_TLS) != 0)
5287 {
5288 if (tls_type != (TLS_TLS | TLS_LD))
5289 {
5290 if ((tls_mask & TLS_LD) != 0
5291 && !(h == NULL
5292 || !h->def_dynamic))
5293 off += 8;
5294 if (tls_type != (TLS_TLS | TLS_GD))
5295 {
5296 if ((tls_mask & TLS_GD) != 0)
5297 off += 8;
5298 if (tls_type != (TLS_TLS | TLS_DTPREL))
5299 {
5300 if ((tls_mask & TLS_DTPREL) != 0)
5301 off += 4;
5302 }
5303 }
5304 }
5305 }
5306
5307 relocation = htab->got->output_offset + off - 4;
5308
5309 /* Addends on got relocations don't make much sense.
5310 x+off@got is actually x@got+off, and since the got is
5311 generated by a hash table traversal, the value in the
5312 got at entry m+n bears little relation to the entry m. */
5313 if (addend != 0)
5314 (*_bfd_error_handler)
5315 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5316 input_bfd,
5317 input_section,
5318 (long) rel->r_offset,
5319 howto->name,
5320 sym_name);
5321 }
5322 break;
5323
5324 /* Relocations that need no special processing. */
5325 case R_PPC_LOCAL24PC:
5326 /* It makes no sense to point a local relocation
5327 at a symbol not in this object. */
5328 if (unresolved_reloc)
5329 {
5330 if (! (*info->callbacks->undefined_symbol) (info,
5331 h->root.root.string,
5332 input_bfd,
5333 input_section,
5334 rel->r_offset,
5335 TRUE))
5336 return FALSE;
5337 continue;
5338 }
5339 break;
5340
5341 case R_PPC_DTPREL16:
5342 case R_PPC_DTPREL16_LO:
5343 case R_PPC_DTPREL16_HI:
5344 case R_PPC_DTPREL16_HA:
5345 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5346 break;
5347
5348 /* Relocations that may need to be propagated if this is a shared
5349 object. */
5350 case R_PPC_TPREL16:
5351 case R_PPC_TPREL16_LO:
5352 case R_PPC_TPREL16_HI:
5353 case R_PPC_TPREL16_HA:
5354 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5355 /* The TPREL16 relocs shouldn't really be used in shared
5356 libs as they will result in DT_TEXTREL being set, but
5357 support them anyway. */
5358 goto dodyn;
5359
5360 case R_PPC_TPREL32:
5361 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5362 goto dodyn;
5363
5364 case R_PPC_DTPREL32:
5365 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5366 goto dodyn;
5367
5368 case R_PPC_DTPMOD32:
5369 relocation = 1;
5370 addend = 0;
5371 goto dodyn;
5372
5373 case R_PPC_REL24:
5374 case R_PPC_REL32:
5375 case R_PPC_REL14:
5376 case R_PPC_REL14_BRTAKEN:
5377 case R_PPC_REL14_BRNTAKEN:
5378 /* If these relocations are not to a named symbol, they can be
5379 handled right here, no need to bother the dynamic linker. */
5380 if (SYMBOL_REFERENCES_LOCAL (info, h)
5381 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5382 break;
5383 /* fall through */
5384
5385 /* Relocations that always need to be propagated if this is a shared
5386 object. */
5387 case R_PPC_ADDR32:
5388 case R_PPC_ADDR24:
5389 case R_PPC_ADDR16:
5390 case R_PPC_ADDR16_LO:
5391 case R_PPC_ADDR16_HI:
5392 case R_PPC_ADDR16_HA:
5393 case R_PPC_ADDR14:
5394 case R_PPC_ADDR14_BRTAKEN:
5395 case R_PPC_ADDR14_BRNTAKEN:
5396 case R_PPC_UADDR32:
5397 case R_PPC_UADDR16:
5398 /* r_symndx will be zero only for relocs against symbols
5399 from removed linkonce sections, or sections discarded by
5400 a linker script. */
5401 dodyn:
5402 if (r_symndx == 0)
5403 break;
5404 /* Fall thru. */
5405
5406 if ((info->shared
5407 && (h == NULL
5408 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5409 || h->root.type != bfd_link_hash_undefweak)
5410 && (MUST_BE_DYN_RELOC (r_type)
5411 || !SYMBOL_CALLS_LOCAL (info, h)))
5412 || (ELIMINATE_COPY_RELOCS
5413 && !info->shared
5414 && (input_section->flags & SEC_ALLOC) != 0
5415 && h != NULL
5416 && h->dynindx != -1
5417 && !h->non_got_ref
5418 && h->def_dynamic
5419 && !h->def_regular))
5420 {
5421 int skip;
5422
5423 #ifdef DEBUG
5424 fprintf (stderr, "ppc_elf_relocate_section needs to "
5425 "create relocation for %s\n",
5426 (h && h->root.root.string
5427 ? h->root.root.string : "<unknown>"));
5428 #endif
5429
5430 /* When generating a shared object, these relocations
5431 are copied into the output file to be resolved at run
5432 time. */
5433 if (sreloc == NULL)
5434 {
5435 const char *name;
5436
5437 name = (bfd_elf_string_from_elf_section
5438 (input_bfd,
5439 elf_elfheader (input_bfd)->e_shstrndx,
5440 elf_section_data (input_section)->rel_hdr.sh_name));
5441 if (name == NULL)
5442 return FALSE;
5443
5444 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5445 && strcmp (bfd_get_section_name (input_bfd,
5446 input_section),
5447 name + 5) == 0);
5448
5449 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5450 BFD_ASSERT (sreloc != NULL);
5451 }
5452
5453 skip = 0;
5454
5455 outrel.r_offset =
5456 _bfd_elf_section_offset (output_bfd, info, input_section,
5457 rel->r_offset);
5458 if (outrel.r_offset == (bfd_vma) -1
5459 || outrel.r_offset == (bfd_vma) -2)
5460 skip = (int) outrel.r_offset;
5461 outrel.r_offset += (input_section->output_section->vma
5462 + input_section->output_offset);
5463
5464 if (skip)
5465 memset (&outrel, 0, sizeof outrel);
5466 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5467 {
5468 unresolved_reloc = FALSE;
5469 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5470 outrel.r_addend = rel->r_addend;
5471 }
5472 else
5473 {
5474 outrel.r_addend = relocation + rel->r_addend;
5475
5476 if (r_type == R_PPC_ADDR32)
5477 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5478 else
5479 {
5480 long indx;
5481
5482 if (bfd_is_abs_section (sec))
5483 indx = 0;
5484 else if (sec == NULL || sec->owner == NULL)
5485 {
5486 bfd_set_error (bfd_error_bad_value);
5487 return FALSE;
5488 }
5489 else
5490 {
5491 asection *osec;
5492
5493 /* We are turning this relocation into one
5494 against a section symbol. It would be
5495 proper to subtract the symbol's value,
5496 osec->vma, from the emitted reloc addend,
5497 but ld.so expects buggy relocs. */
5498 osec = sec->output_section;
5499 indx = elf_section_data (osec)->dynindx;
5500 BFD_ASSERT (indx > 0);
5501 #ifdef DEBUG
5502 if (indx <= 0)
5503 printf ("indx=%d section=%s flags=%08x name=%s\n",
5504 indx, osec->name, osec->flags,
5505 h->root.root.string);
5506 #endif
5507 }
5508
5509 outrel.r_info = ELF32_R_INFO (indx, r_type);
5510 }
5511 }
5512
5513 loc = sreloc->contents;
5514 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5515 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5516
5517 if (skip == -1)
5518 continue;
5519
5520 /* This reloc will be computed at runtime. We clear the memory
5521 so that it contains predictable value. */
5522 if (! skip
5523 && ((input_section->flags & SEC_ALLOC) != 0
5524 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5525 {
5526 relocation = howto->pc_relative ? outrel.r_offset : 0;
5527 addend = 0;
5528 break;
5529 }
5530 }
5531 break;
5532
5533 case R_PPC_RELAX32PC_PLT:
5534 case R_PPC_RELAX32_PLT:
5535 BFD_ASSERT (h != NULL
5536 && h->plt.offset != (bfd_vma) -1
5537 && htab->plt != NULL);
5538
5539 relocation = (htab->plt->output_section->vma
5540 + htab->plt->output_offset
5541 + h->plt.offset);
5542 if (r_type == R_PPC_RELAX32_PLT)
5543 goto relax32;
5544 /* Fall thru */
5545
5546 case R_PPC_RELAX32PC:
5547 relocation -= (input_section->output_section->vma
5548 + input_section->output_offset
5549 + rel->r_offset - 4);
5550 /* Fall thru */
5551
5552 case R_PPC_RELAX32:
5553 relax32:
5554 {
5555 unsigned long t0;
5556 unsigned long t1;
5557
5558 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5559 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5560
5561 /* We're clearing the bits for R_PPC_ADDR16_HA
5562 and R_PPC_ADDR16_LO here. */
5563 t0 &= ~0xffff;
5564 t1 &= ~0xffff;
5565
5566 /* t0 is HA, t1 is LO */
5567 relocation += addend;
5568 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5569 t1 |= relocation & 0xffff;
5570
5571 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5572 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5573 }
5574 continue;
5575
5576 /* Indirect .sdata relocation. */
5577 case R_PPC_EMB_SDAI16:
5578 BFD_ASSERT (htab->sdata[0].section != NULL);
5579 relocation
5580 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5581 &htab->sdata[0], h,
5582 relocation, rel);
5583 break;
5584
5585 /* Indirect .sdata2 relocation. */
5586 case R_PPC_EMB_SDA2I16:
5587 BFD_ASSERT (htab->sdata[1].section != NULL);
5588 relocation
5589 = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
5590 &htab->sdata[1], h,
5591 relocation, rel);
5592 break;
5593
5594 /* Handle the TOC16 reloc. We want to use the offset within the .got
5595 section, not the actual VMA. This is appropriate when generating
5596 an embedded ELF object, for which the .got section acts like the
5597 AIX .toc section. */
5598 case R_PPC_TOC16: /* phony GOT16 relocations */
5599 BFD_ASSERT (sec != NULL);
5600 BFD_ASSERT (bfd_is_und_section (sec)
5601 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5602 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
5603
5604 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5605 break;
5606
5607 case R_PPC_PLTREL24:
5608 /* Relocation is to the entry for this symbol in the
5609 procedure linkage table. */
5610 BFD_ASSERT (h != NULL);
5611
5612 if (h->plt.offset == (bfd_vma) -1
5613 || htab->plt == NULL)
5614 {
5615 /* We didn't make a PLT entry for this symbol. This
5616 happens when statically linking PIC code, or when
5617 using -Bsymbolic. */
5618 break;
5619 }
5620
5621 unresolved_reloc = FALSE;
5622 relocation = (htab->plt->output_section->vma
5623 + htab->plt->output_offset
5624 + h->plt.offset);
5625 break;
5626
5627 /* Relocate against _SDA_BASE_. */
5628 case R_PPC_SDAREL16:
5629 {
5630 const char *name;
5631
5632 BFD_ASSERT (sec != NULL);
5633 name = bfd_get_section_name (abfd, sec->output_section);
5634 if (! ((strncmp (name, ".sdata", 6) == 0
5635 && (name[6] == 0 || name[6] == '.'))
5636 || (strncmp (name, ".sbss", 5) == 0
5637 && (name[5] == 0 || name[5] == '.'))))
5638 {
5639 (*_bfd_error_handler)
5640 (_("%B: the target (%s) of a %s relocation is "
5641 "in the wrong output section (%s)"),
5642 input_bfd,
5643 sym_name,
5644 howto->name,
5645 name);
5646 }
5647 addend -= htab->sdata[0].sym_val;
5648 }
5649 break;
5650
5651 /* Relocate against _SDA2_BASE_. */
5652 case R_PPC_EMB_SDA2REL:
5653 {
5654 const char *name;
5655
5656 BFD_ASSERT (sec != NULL);
5657 name = bfd_get_section_name (abfd, sec->output_section);
5658 if (! (strncmp (name, ".sdata2", 7) == 0
5659 || strncmp (name, ".sbss2", 6) == 0))
5660 {
5661 (*_bfd_error_handler)
5662 (_("%B: the target (%s) of a %s relocation is "
5663 "in the wrong output section (%s)"),
5664 input_bfd,
5665 sym_name,
5666 howto->name,
5667 name);
5668
5669 bfd_set_error (bfd_error_bad_value);
5670 ret = FALSE;
5671 continue;
5672 }
5673 addend -= htab->sdata[1].sym_val;
5674 }
5675 break;
5676
5677 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5678 case R_PPC_EMB_SDA21:
5679 case R_PPC_EMB_RELSDA:
5680 {
5681 const char *name;
5682 int reg;
5683
5684 BFD_ASSERT (sec != NULL);
5685 name = bfd_get_section_name (abfd, sec->output_section);
5686 if (((strncmp (name, ".sdata", 6) == 0
5687 && (name[6] == 0 || name[6] == '.'))
5688 || (strncmp (name, ".sbss", 5) == 0
5689 && (name[5] == 0 || name[5] == '.'))))
5690 {
5691 reg = 13;
5692 addend -= htab->sdata[0].sym_val;
5693 }
5694
5695 else if (strncmp (name, ".sdata2", 7) == 0
5696 || strncmp (name, ".sbss2", 6) == 0)
5697 {
5698 reg = 2;
5699 addend -= htab->sdata[1].sym_val;
5700 }
5701
5702 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5703 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5704 {
5705 reg = 0;
5706 }
5707
5708 else
5709 {
5710 (*_bfd_error_handler)
5711 (_("%B: the target (%s) of a %s relocation is "
5712 "in the wrong output section (%s)"),
5713 input_bfd,
5714 sym_name,
5715 howto->name,
5716 name);
5717
5718 bfd_set_error (bfd_error_bad_value);
5719 ret = FALSE;
5720 continue;
5721 }
5722
5723 if (r_type == R_PPC_EMB_SDA21)
5724 { /* fill in register field */
5725 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5726 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5727 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5728 }
5729 }
5730 break;
5731
5732 /* Relocate against the beginning of the section. */
5733 case R_PPC_SECTOFF:
5734 case R_PPC_SECTOFF_LO:
5735 case R_PPC_SECTOFF_HI:
5736 case R_PPC_SECTOFF_HA:
5737 BFD_ASSERT (sec != NULL);
5738 addend -= sec->output_section->vma;
5739 break;
5740
5741 /* Negative relocations. */
5742 case R_PPC_EMB_NADDR32:
5743 case R_PPC_EMB_NADDR16:
5744 case R_PPC_EMB_NADDR16_LO:
5745 case R_PPC_EMB_NADDR16_HI:
5746 case R_PPC_EMB_NADDR16_HA:
5747 addend -= 2 * relocation;
5748 break;
5749
5750 case R_PPC_COPY:
5751 case R_PPC_GLOB_DAT:
5752 case R_PPC_JMP_SLOT:
5753 case R_PPC_RELATIVE:
5754 case R_PPC_PLT32:
5755 case R_PPC_PLTREL32:
5756 case R_PPC_PLT16_LO:
5757 case R_PPC_PLT16_HI:
5758 case R_PPC_PLT16_HA:
5759 case R_PPC_ADDR30:
5760 case R_PPC_EMB_RELSEC16:
5761 case R_PPC_EMB_RELST_LO:
5762 case R_PPC_EMB_RELST_HI:
5763 case R_PPC_EMB_RELST_HA:
5764 case R_PPC_EMB_BIT_FLD:
5765 (*_bfd_error_handler)
5766 (_("%B: relocation %s is not yet supported for symbol %s."),
5767 input_bfd,
5768 howto->name,
5769 sym_name);
5770
5771 bfd_set_error (bfd_error_invalid_operation);
5772 ret = FALSE;
5773 continue;
5774 }
5775
5776 /* Do any further special processing. */
5777 switch (r_type)
5778 {
5779 default:
5780 break;
5781
5782 case R_PPC_ADDR16_HA:
5783 case R_PPC_GOT16_HA:
5784 case R_PPC_PLT16_HA:
5785 case R_PPC_SECTOFF_HA:
5786 case R_PPC_TPREL16_HA:
5787 case R_PPC_DTPREL16_HA:
5788 case R_PPC_GOT_TLSGD16_HA:
5789 case R_PPC_GOT_TLSLD16_HA:
5790 case R_PPC_GOT_TPREL16_HA:
5791 case R_PPC_GOT_DTPREL16_HA:
5792 case R_PPC_EMB_NADDR16_HA:
5793 case R_PPC_EMB_RELST_HA:
5794 /* It's just possible that this symbol is a weak symbol
5795 that's not actually defined anywhere. In that case,
5796 'sec' would be NULL, and we should leave the symbol
5797 alone (it will be set to zero elsewhere in the link). */
5798 if (sec != NULL)
5799 /* Add 0x10000 if sign bit in 0:15 is set.
5800 Bits 0:15 are not used. */
5801 addend += 0x8000;
5802 break;
5803 }
5804
5805 #ifdef DEBUG
5806 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5807 "offset = %ld, addend = %ld\n",
5808 howto->name,
5809 (int) r_type,
5810 sym_name,
5811 r_symndx,
5812 (long) rel->r_offset,
5813 (long) addend);
5814 #endif
5815
5816 if (unresolved_reloc
5817 && !((input_section->flags & SEC_DEBUGGING) != 0
5818 && h->def_dynamic))
5819 {
5820 (*_bfd_error_handler)
5821 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5822 input_bfd,
5823 input_section,
5824 (long) rel->r_offset,
5825 howto->name,
5826 sym_name);
5827 ret = FALSE;
5828 }
5829
5830 r = _bfd_final_link_relocate (howto,
5831 input_bfd,
5832 input_section,
5833 contents,
5834 rel->r_offset,
5835 relocation,
5836 addend);
5837
5838 if (r != bfd_reloc_ok)
5839 {
5840 if (sym_name == NULL)
5841 sym_name = "(null)";
5842 if (r == bfd_reloc_overflow)
5843 {
5844 if (warned)
5845 continue;
5846 if (h != NULL
5847 && h->root.type == bfd_link_hash_undefweak
5848 && howto->pc_relative)
5849 {
5850 /* Assume this is a call protected by other code that
5851 detect the symbol is undefined. If this is the case,
5852 we can safely ignore the overflow. If not, the
5853 program is hosed anyway, and a little warning isn't
5854 going to help. */
5855
5856 continue;
5857 }
5858
5859 if (! (*info->callbacks->reloc_overflow) (info,
5860 (h ? &h->root : NULL),
5861 sym_name,
5862 howto->name,
5863 rel->r_addend,
5864 input_bfd,
5865 input_section,
5866 rel->r_offset))
5867 return FALSE;
5868 }
5869 else
5870 {
5871 (*_bfd_error_handler)
5872 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5873 input_bfd, input_section,
5874 (long) rel->r_offset, howto->name, sym_name, (int) r);
5875 ret = FALSE;
5876 }
5877 }
5878 }
5879
5880 #ifdef DEBUG
5881 fprintf (stderr, "\n");
5882 #endif
5883
5884 return ret;
5885 }
5886 \f
5887 /* Finish up dynamic symbol handling. We set the contents of various
5888 dynamic sections here. */
5889
5890 static bfd_boolean
5891 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
5892 struct bfd_link_info *info,
5893 struct elf_link_hash_entry *h,
5894 Elf_Internal_Sym *sym)
5895 {
5896 struct ppc_elf_link_hash_table *htab;
5897
5898 #ifdef DEBUG
5899 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
5900 h->root.root.string);
5901 #endif
5902
5903 htab = ppc_elf_hash_table (info);
5904 BFD_ASSERT (htab->elf.dynobj != NULL);
5905
5906 if (h->plt.offset != (bfd_vma) -1)
5907 {
5908 Elf_Internal_Rela rela;
5909 bfd_byte *loc;
5910 bfd_vma reloc_index;
5911
5912 #ifdef DEBUG
5913 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
5914 #endif
5915
5916 /* This symbol has an entry in the procedure linkage table. Set
5917 it up. */
5918
5919 BFD_ASSERT (h->dynindx != -1);
5920 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
5921
5922 /* We don't need to fill in the .plt. The ppc dynamic linker
5923 will fill it in. */
5924
5925 /* Fill in the entry in the .rela.plt section. */
5926 rela.r_offset = (htab->plt->output_section->vma
5927 + htab->plt->output_offset
5928 + h->plt.offset);
5929 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
5930 rela.r_addend = 0;
5931
5932 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
5933 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
5934 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
5935 loc = (htab->relplt->contents
5936 + reloc_index * sizeof (Elf32_External_Rela));
5937 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5938
5939 if (!h->def_regular)
5940 {
5941 /* Mark the symbol as undefined, rather than as defined in
5942 the .plt section. Leave the value alone. */
5943 sym->st_shndx = SHN_UNDEF;
5944 /* If the symbol is weak, we do need to clear the value.
5945 Otherwise, the PLT entry would provide a definition for
5946 the symbol even if the symbol wasn't defined anywhere,
5947 and so the symbol would never be NULL. */
5948 if (!h->ref_regular_nonweak)
5949 sym->st_value = 0;
5950 }
5951 }
5952
5953 if (h->needs_copy)
5954 {
5955 asection *s;
5956 Elf_Internal_Rela rela;
5957 bfd_byte *loc;
5958
5959 /* This symbols needs a copy reloc. Set it up. */
5960
5961 #ifdef DEBUG
5962 fprintf (stderr, ", copy");
5963 #endif
5964
5965 BFD_ASSERT (h->dynindx != -1);
5966
5967 if (h->size <= elf_gp_size (htab->elf.dynobj))
5968 s = htab->relsbss;
5969 else
5970 s = htab->relbss;
5971 BFD_ASSERT (s != NULL);
5972
5973 rela.r_offset = (h->root.u.def.value
5974 + h->root.u.def.section->output_section->vma
5975 + h->root.u.def.section->output_offset);
5976 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
5977 rela.r_addend = 0;
5978 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5979 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5980 }
5981
5982 #ifdef DEBUG
5983 fprintf (stderr, "\n");
5984 #endif
5985
5986 /* Mark some specially defined symbols as absolute. */
5987 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5988 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
5989 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
5990 sym->st_shndx = SHN_ABS;
5991
5992 return TRUE;
5993 }
5994 \f
5995 static enum elf_reloc_type_class
5996 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5997 {
5998 switch (ELF32_R_TYPE (rela->r_info))
5999 {
6000 case R_PPC_RELATIVE:
6001 return reloc_class_relative;
6002 case R_PPC_REL24:
6003 case R_PPC_ADDR24:
6004 case R_PPC_JMP_SLOT:
6005 return reloc_class_plt;
6006 case R_PPC_COPY:
6007 return reloc_class_copy;
6008 default:
6009 return reloc_class_normal;
6010 }
6011 }
6012 \f
6013 /* Finish up the dynamic sections. */
6014
6015 static bfd_boolean
6016 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
6017 struct bfd_link_info *info)
6018 {
6019 asection *sdyn;
6020 struct ppc_elf_link_hash_table *htab;
6021
6022 #ifdef DEBUG
6023 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
6024 #endif
6025
6026 htab = ppc_elf_hash_table (info);
6027 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
6028
6029 if (htab->elf.dynamic_sections_created)
6030 {
6031 Elf32_External_Dyn *dyncon, *dynconend;
6032
6033 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
6034
6035 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6036 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6037 for (; dyncon < dynconend; dyncon++)
6038 {
6039 Elf_Internal_Dyn dyn;
6040 asection *s;
6041
6042 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
6043
6044 switch (dyn.d_tag)
6045 {
6046 case DT_PLTGOT:
6047 s = htab->plt;
6048 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6049 break;
6050
6051 case DT_PLTRELSZ:
6052 dyn.d_un.d_val = htab->relplt->size;
6053 break;
6054
6055 case DT_JMPREL:
6056 s = htab->relplt;
6057 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6058 break;
6059
6060 default:
6061 continue;
6062 }
6063
6064 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6065 }
6066 }
6067
6068 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
6069 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
6070 if (htab->got)
6071 {
6072 unsigned char *contents = htab->got->contents;
6073 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
6074
6075 if (sdyn == NULL)
6076 bfd_put_32 (output_bfd, 0, contents + 4);
6077 else
6078 bfd_put_32 (output_bfd,
6079 sdyn->output_section->vma + sdyn->output_offset,
6080 contents + 4);
6081
6082 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
6083 }
6084
6085 return TRUE;
6086 }
6087 \f
6088 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6089 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6090 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6091 #define TARGET_BIG_NAME "elf32-powerpc"
6092 #define ELF_ARCH bfd_arch_powerpc
6093 #define ELF_MACHINE_CODE EM_PPC
6094 #ifdef __QNXTARGET__
6095 #define ELF_MAXPAGESIZE 0x1000
6096 #else
6097 #define ELF_MAXPAGESIZE 0x10000
6098 #endif
6099 #define ELF_MINPAGESIZE 0x1000
6100 #define elf_info_to_howto ppc_elf_info_to_howto
6101
6102 #ifdef EM_CYGNUS_POWERPC
6103 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6104 #endif
6105
6106 #ifdef EM_PPC_OLD
6107 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6108 #endif
6109
6110 #define elf_backend_plt_not_loaded 1
6111 #define elf_backend_got_symbol_offset 4
6112 #define elf_backend_can_gc_sections 1
6113 #define elf_backend_can_refcount 1
6114 #define elf_backend_got_header_size 12
6115 #define elf_backend_rela_normal 1
6116
6117 #define bfd_elf32_mkobject ppc_elf_mkobject
6118 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6119 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6120 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6121 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6122 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6123
6124 #define elf_backend_object_p ppc_elf_object_p
6125 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6126 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6127 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6128 #define elf_backend_relocate_section ppc_elf_relocate_section
6129 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6130 #define elf_backend_check_relocs ppc_elf_check_relocs
6131 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6132 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6133 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6134 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6135 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6136 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6137 #define elf_backend_fake_sections ppc_elf_fake_sections
6138 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6139 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6140 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6141 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6142 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6143 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6144 #define elf_backend_write_section ppc_elf_write_section
6145 #define elf_backend_special_sections ppc_elf_special_sections
6146 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6147
6148 #include "elf32-target.h"
GDB Binutils - Deliverables
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