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Apply patch for binutils bug 806, approved by nickc@redhat.com.
[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 } elf_linker_section_pointers_t;
1536
1537 struct ppc_elf_obj_tdata
1538 {
1539 struct elf_obj_tdata elf;
1540
1541 /* A mapping from local symbols to offsets into the various linker
1542 sections added. This is index by the symbol index. */
1543 elf_linker_section_pointers_t **linker_section_pointers;
1544 };
1545
1546 #define ppc_elf_tdata(bfd) \
1547 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1548
1549 #define elf_local_ptr_offsets(bfd) \
1550 (ppc_elf_tdata (bfd)->linker_section_pointers)
1551
1552 /* Override the generic function because we store some extras. */
1553
1554 static bfd_boolean
1555 ppc_elf_mkobject (bfd *abfd)
1556 {
1557 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1558 abfd->tdata.any = bfd_zalloc (abfd, amt);
1559 if (abfd->tdata.any == NULL)
1560 return FALSE;
1561 return TRUE;
1562 }
1563
1564 /* Fix bad default arch selected for a 32 bit input bfd when the
1565 default is 64 bit. */
1566
1567 static bfd_boolean
1568 ppc_elf_object_p (bfd *abfd)
1569 {
1570 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1571 {
1572 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1573
1574 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1575 {
1576 /* Relies on arch after 64 bit default being 32 bit default. */
1577 abfd->arch_info = abfd->arch_info->next;
1578 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1579 }
1580 }
1581 return TRUE;
1582 }
1583
1584 /* Function to set whether a module needs the -mrelocatable bit set. */
1585
1586 static bfd_boolean
1587 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1588 {
1589 BFD_ASSERT (!elf_flags_init (abfd)
1590 || elf_elfheader (abfd)->e_flags == flags);
1591
1592 elf_elfheader (abfd)->e_flags = flags;
1593 elf_flags_init (abfd) = TRUE;
1594 return TRUE;
1595 }
1596
1597 /* Support for core dump NOTE sections. */
1598
1599 static bfd_boolean
1600 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1601 {
1602 int offset;
1603 unsigned int size;
1604
1605 switch (note->descsz)
1606 {
1607 default:
1608 return FALSE;
1609
1610 case 268: /* Linux/PPC. */
1611 /* pr_cursig */
1612 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1613
1614 /* pr_pid */
1615 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1616
1617 /* pr_reg */
1618 offset = 72;
1619 size = 192;
1620
1621 break;
1622 }
1623
1624 /* Make a ".reg/999" section. */
1625 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1626 size, note->descpos + offset);
1627 }
1628
1629 static bfd_boolean
1630 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1631 {
1632 switch (note->descsz)
1633 {
1634 default:
1635 return FALSE;
1636
1637 case 128: /* Linux/PPC elf_prpsinfo. */
1638 elf_tdata (abfd)->core_program
1639 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1640 elf_tdata (abfd)->core_command
1641 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1642 }
1643
1644 /* Note that for some reason, a spurious space is tacked
1645 onto the end of the args in some (at least one anyway)
1646 implementations, so strip it off if it exists. */
1647
1648 {
1649 char *command = elf_tdata (abfd)->core_command;
1650 int n = strlen (command);
1651
1652 if (0 < n && command[n - 1] == ' ')
1653 command[n - 1] = '\0';
1654 }
1655
1656 return TRUE;
1657 }
1658
1659 /* Return address for Ith PLT stub in section PLT, for relocation REL
1660 or (bfd_vma) -1 if it should not be included. */
1661
1662 static bfd_vma
1663 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1664 const asection *plt ATTRIBUTE_UNUSED,
1665 const arelent *rel)
1666 {
1667 return rel->address;
1668 }
1669
1670 /* Handle a PowerPC specific section when reading an object file. This
1671 is called when bfd_section_from_shdr finds a section with an unknown
1672 type. */
1673
1674 static bfd_boolean
1675 ppc_elf_section_from_shdr (bfd *abfd,
1676 Elf_Internal_Shdr *hdr,
1677 const char *name,
1678 int shindex)
1679 {
1680 asection *newsect;
1681 flagword flags;
1682
1683 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1684 return FALSE;
1685
1686 newsect = hdr->bfd_section;
1687 flags = bfd_get_section_flags (abfd, newsect);
1688 if (hdr->sh_flags & SHF_EXCLUDE)
1689 flags |= SEC_EXCLUDE;
1690
1691 if (hdr->sh_type == SHT_ORDERED)
1692 flags |= SEC_SORT_ENTRIES;
1693
1694 bfd_set_section_flags (abfd, newsect, flags);
1695 return TRUE;
1696 }
1697
1698 /* Set up any other section flags and such that may be necessary. */
1699
1700 static bfd_boolean
1701 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1702 Elf_Internal_Shdr *shdr,
1703 asection *asect)
1704 {
1705 if ((asect->flags & SEC_EXCLUDE) != 0)
1706 shdr->sh_flags |= SHF_EXCLUDE;
1707
1708 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1709 shdr->sh_type = SHT_ORDERED;
1710
1711 return TRUE;
1712 }
1713
1714 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1715 need to bump up the number of section headers. */
1716
1717 static int
1718 ppc_elf_additional_program_headers (bfd *abfd)
1719 {
1720 asection *s;
1721 int ret = 0;
1722
1723 s = bfd_get_section_by_name (abfd, ".sbss2");
1724 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1725 ++ret;
1726
1727 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1728 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1729 ++ret;
1730
1731 return ret;
1732 }
1733
1734 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1735 .PPC.EMB.sbss0 a normal section, and not a bss section so
1736 that the linker doesn't crater when trying to make more than
1737 2 sections. */
1738
1739 static struct bfd_elf_special_section const ppc_elf_special_sections[]=
1740 {
1741 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1742 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1743 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1744 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1745 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1746 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1747 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1748 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1749 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1750 { NULL, 0, 0, 0, 0 }
1751 };
1752 \f
1753 /* Very simple linked list structure for recording apuinfo values. */
1754 typedef struct apuinfo_list
1755 {
1756 struct apuinfo_list *next;
1757 unsigned long value;
1758 }
1759 apuinfo_list;
1760
1761 static apuinfo_list *head;
1762
1763
1764 static void
1765 apuinfo_list_init (void)
1766 {
1767 head = NULL;
1768 }
1769
1770 static void
1771 apuinfo_list_add (unsigned long value)
1772 {
1773 apuinfo_list *entry = head;
1774
1775 while (entry != NULL)
1776 {
1777 if (entry->value == value)
1778 return;
1779 entry = entry->next;
1780 }
1781
1782 entry = bfd_malloc (sizeof (* entry));
1783 if (entry == NULL)
1784 return;
1785
1786 entry->value = value;
1787 entry->next = head;
1788 head = entry;
1789 }
1790
1791 static unsigned
1792 apuinfo_list_length (void)
1793 {
1794 apuinfo_list *entry;
1795 unsigned long count;
1796
1797 for (entry = head, count = 0;
1798 entry;
1799 entry = entry->next)
1800 ++ count;
1801
1802 return count;
1803 }
1804
1805 static inline unsigned long
1806 apuinfo_list_element (unsigned long number)
1807 {
1808 apuinfo_list * entry;
1809
1810 for (entry = head;
1811 entry && number --;
1812 entry = entry->next)
1813 ;
1814
1815 return entry ? entry->value : 0;
1816 }
1817
1818 static void
1819 apuinfo_list_finish (void)
1820 {
1821 apuinfo_list *entry;
1822
1823 for (entry = head; entry;)
1824 {
1825 apuinfo_list *next = entry->next;
1826 free (entry);
1827 entry = next;
1828 }
1829
1830 head = NULL;
1831 }
1832
1833 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
1834 #define APUINFO_LABEL "APUinfo"
1835
1836 /* Scan the input BFDs and create a linked list of
1837 the APUinfo values that will need to be emitted. */
1838
1839 static void
1840 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
1841 {
1842 bfd *ibfd;
1843 asection *asec;
1844 char *buffer;
1845 unsigned num_input_sections;
1846 bfd_size_type output_section_size;
1847 unsigned i;
1848 unsigned num_entries;
1849 unsigned long offset;
1850 unsigned long length;
1851 const char *error_message = NULL;
1852
1853 if (link_info == NULL)
1854 return;
1855
1856 /* Scan the input bfds, looking for apuinfo sections. */
1857 num_input_sections = 0;
1858 output_section_size = 0;
1859
1860 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1861 {
1862 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1863 if (asec)
1864 {
1865 ++ num_input_sections;
1866 output_section_size += asec->size;
1867 }
1868 }
1869
1870 /* We need at least one input sections
1871 in order to make merging worthwhile. */
1872 if (num_input_sections < 1)
1873 return;
1874
1875 /* Just make sure that the output section exists as well. */
1876 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1877 if (asec == NULL)
1878 return;
1879
1880 /* Allocate a buffer for the contents of the input sections. */
1881 buffer = bfd_malloc (output_section_size);
1882 if (buffer == NULL)
1883 return;
1884
1885 offset = 0;
1886 apuinfo_list_init ();
1887
1888 /* Read in the input sections contents. */
1889 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
1890 {
1891 unsigned long datum;
1892 char *ptr;
1893
1894 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
1895 if (asec == NULL)
1896 continue;
1897
1898 length = asec->size;
1899 if (length < 24)
1900 {
1901 error_message = _("corrupt or empty %s section in %B");
1902 goto fail;
1903 }
1904
1905 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
1906 || (bfd_bread (buffer + offset, length, ibfd) != length))
1907 {
1908 error_message = _("unable to read in %s section from %B");
1909 goto fail;
1910 }
1911
1912 /* Process the contents of the section. */
1913 ptr = buffer + offset;
1914 error_message = _("corrupt %s section in %B");
1915
1916 /* Verify the contents of the header. Note - we have to
1917 extract the values this way in order to allow for a
1918 host whose endian-ness is different from the target. */
1919 datum = bfd_get_32 (ibfd, ptr);
1920 if (datum != sizeof APUINFO_LABEL)
1921 goto fail;
1922
1923 datum = bfd_get_32 (ibfd, ptr + 8);
1924 if (datum != 0x2)
1925 goto fail;
1926
1927 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
1928 goto fail;
1929
1930 /* Get the number of bytes used for apuinfo entries. */
1931 datum = bfd_get_32 (ibfd, ptr + 4);
1932 if (datum + 20 != length)
1933 goto fail;
1934
1935 /* Make sure that we do not run off the end of the section. */
1936 if (offset + length > output_section_size)
1937 goto fail;
1938
1939 /* Scan the apuinfo section, building a list of apuinfo numbers. */
1940 for (i = 0; i < datum; i += 4)
1941 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
1942
1943 /* Update the offset. */
1944 offset += length;
1945 }
1946
1947 error_message = NULL;
1948
1949 /* Compute the size of the output section. */
1950 num_entries = apuinfo_list_length ();
1951 output_section_size = 20 + num_entries * 4;
1952
1953 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1954
1955 if (! bfd_set_section_size (abfd, asec, output_section_size))
1956 ibfd = abfd,
1957 error_message = _("warning: unable to set size of %s section in %B");
1958
1959 fail:
1960 free (buffer);
1961
1962 if (error_message)
1963 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
1964 }
1965
1966 /* Prevent the output section from accumulating the input sections'
1967 contents. We have already stored this in our linked list structure. */
1968
1969 static bfd_boolean
1970 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
1971 asection *asec,
1972 bfd_byte *contents ATTRIBUTE_UNUSED)
1973 {
1974 return (apuinfo_list_length ()
1975 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
1976 }
1977
1978 /* Finally we can generate the output section. */
1979
1980 static void
1981 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
1982 {
1983 bfd_byte *buffer;
1984 asection *asec;
1985 unsigned i;
1986 unsigned num_entries;
1987 bfd_size_type length;
1988
1989 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
1990 if (asec == NULL)
1991 return;
1992
1993 if (apuinfo_list_length () == 0)
1994 return;
1995
1996 length = asec->size;
1997 if (length < 20)
1998 return;
1999
2000 buffer = bfd_malloc (length);
2001 if (buffer == NULL)
2002 {
2003 (*_bfd_error_handler)
2004 (_("failed to allocate space for new APUinfo section."));
2005 return;
2006 }
2007
2008 /* Create the apuinfo header. */
2009 num_entries = apuinfo_list_length ();
2010 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2011 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2012 bfd_put_32 (abfd, 0x2, buffer + 8);
2013 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2014
2015 length = 20;
2016 for (i = 0; i < num_entries; i++)
2017 {
2018 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2019 length += 4;
2020 }
2021
2022 if (length != asec->size)
2023 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2024
2025 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2026 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2027
2028 free (buffer);
2029
2030 apuinfo_list_finish ();
2031 }
2032 \f
2033 /* The following functions are specific to the ELF linker, while
2034 functions above are used generally. They appear in this file more
2035 or less in the order in which they are called. eg.
2036 ppc_elf_check_relocs is called early in the link process,
2037 ppc_elf_finish_dynamic_sections is one of the last functions
2038 called. */
2039
2040 /* The PPC linker needs to keep track of the number of relocs that it
2041 decides to copy as dynamic relocs in check_relocs for each symbol.
2042 This is so that it can later discard them if they are found to be
2043 unnecessary. We store the information in a field extending the
2044 regular ELF linker hash table. */
2045
2046 struct ppc_elf_dyn_relocs
2047 {
2048 struct ppc_elf_dyn_relocs *next;
2049
2050 /* The input section of the reloc. */
2051 asection *sec;
2052
2053 /* Total number of relocs copied for the input section. */
2054 bfd_size_type count;
2055
2056 /* Number of pc-relative relocs copied for the input section. */
2057 bfd_size_type pc_count;
2058 };
2059
2060 /* Of those relocs that might be copied as dynamic relocs, this macro
2061 selects those that must be copied when linking a shared library,
2062 even when the symbol is local. */
2063
2064 #define MUST_BE_DYN_RELOC(RTYPE) \
2065 ((RTYPE) != R_PPC_REL24 \
2066 && (RTYPE) != R_PPC_REL14 \
2067 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2068 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2069 && (RTYPE) != R_PPC_REL32)
2070
2071 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2072 copying dynamic variables from a shared lib into an app's dynbss
2073 section, and instead use a dynamic relocation to point into the
2074 shared lib. */
2075 #define ELIMINATE_COPY_RELOCS 1
2076
2077 /* PPC ELF linker hash entry. */
2078
2079 struct ppc_elf_link_hash_entry
2080 {
2081 struct elf_link_hash_entry elf;
2082
2083 /* If this symbol is used in the linker created sections, the processor
2084 specific backend uses this field to map the field into the offset
2085 from the beginning of the section. */
2086 elf_linker_section_pointers_t *linker_section_pointer;
2087
2088 /* Track dynamic relocs copied for this symbol. */
2089 struct ppc_elf_dyn_relocs *dyn_relocs;
2090
2091 /* Contexts in which symbol is used in the GOT (or TOC).
2092 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2093 corresponding relocs are encountered during check_relocs.
2094 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2095 indicate the corresponding GOT entry type is not needed. */
2096 #define TLS_GD 1 /* GD reloc. */
2097 #define TLS_LD 2 /* LD reloc. */
2098 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2099 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2100 #define TLS_TLS 16 /* Any TLS reloc. */
2101 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2102 char tls_mask;
2103 };
2104
2105 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2106
2107 /* PPC ELF linker hash table. */
2108
2109 struct ppc_elf_link_hash_table
2110 {
2111 struct elf_link_hash_table elf;
2112
2113 /* Short-cuts to get to dynamic linker sections. */
2114 asection *got;
2115 asection *relgot;
2116 asection *plt;
2117 asection *relplt;
2118 asection *dynbss;
2119 asection *relbss;
2120 asection *dynsbss;
2121 asection *relsbss;
2122 elf_linker_section_t sdata[2];
2123 asection *sbss;
2124
2125 /* Shortcut to .__tls_get_addr. */
2126 struct elf_link_hash_entry *tls_get_addr;
2127
2128 /* TLS local dynamic got entry handling. */
2129 union {
2130 bfd_signed_vma refcount;
2131 bfd_vma offset;
2132 } tlsld_got;
2133
2134 /* Small local sym to section mapping cache. */
2135 struct sym_sec_cache sym_sec;
2136 };
2137
2138 /* Get the PPC ELF linker hash table from a link_info structure. */
2139
2140 #define ppc_elf_hash_table(p) \
2141 ((struct ppc_elf_link_hash_table *) (p)->hash)
2142
2143 /* Create an entry in a PPC ELF linker hash table. */
2144
2145 static struct bfd_hash_entry *
2146 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2147 struct bfd_hash_table *table,
2148 const char *string)
2149 {
2150 /* Allocate the structure if it has not already been allocated by a
2151 subclass. */
2152 if (entry == NULL)
2153 {
2154 entry = bfd_hash_allocate (table,
2155 sizeof (struct ppc_elf_link_hash_entry));
2156 if (entry == NULL)
2157 return entry;
2158 }
2159
2160 /* Call the allocation method of the superclass. */
2161 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2162 if (entry != NULL)
2163 {
2164 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2165 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2166 ppc_elf_hash_entry (entry)->tls_mask = 0;
2167 }
2168
2169 return entry;
2170 }
2171
2172 /* Create a PPC ELF linker hash table. */
2173
2174 static struct bfd_link_hash_table *
2175 ppc_elf_link_hash_table_create (bfd *abfd)
2176 {
2177 struct ppc_elf_link_hash_table *ret;
2178
2179 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2180 if (ret == NULL)
2181 return NULL;
2182
2183 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2184 ppc_elf_link_hash_newfunc))
2185 {
2186 free (ret);
2187 return NULL;
2188 }
2189
2190 ret->sdata[0].name = ".sdata";
2191 ret->sdata[0].sym_name = "_SDA_BASE_";
2192 ret->sdata[0].bss_name = ".sbss";
2193
2194 ret->sdata[1].name = ".sdata2";
2195 ret->sdata[1].sym_name = "_SDA2_BASE_";
2196 ret->sdata[1].bss_name = ".sbss2";
2197
2198 return &ret->elf.root;
2199 }
2200
2201 /* The powerpc .got has a blrl instruction in it. Mark it executable. */
2202
2203 static bfd_boolean
2204 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2205 {
2206 struct ppc_elf_link_hash_table *htab;
2207 asection *s;
2208 flagword flags;
2209
2210 if (!_bfd_elf_create_got_section (abfd, info))
2211 return FALSE;
2212
2213 htab = ppc_elf_hash_table (info);
2214 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2215 if (s == NULL)
2216 abort ();
2217
2218 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2219 | SEC_LINKER_CREATED);
2220 if (!bfd_set_section_flags (abfd, s, flags))
2221 return FALSE;
2222
2223 htab->relgot = bfd_make_section (abfd, ".rela.got");
2224 if (!htab->relgot
2225 || ! bfd_set_section_flags (abfd, htab->relgot,
2226 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
2227 | SEC_IN_MEMORY | SEC_LINKER_CREATED
2228 | SEC_READONLY))
2229 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2230 return FALSE;
2231
2232 return TRUE;
2233 }
2234
2235 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2236 to output sections (just like _bfd_elf_create_dynamic_sections has
2237 to create .dynbss and .rela.bss). */
2238
2239 static bfd_boolean
2240 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2241 {
2242 struct ppc_elf_link_hash_table *htab;
2243 asection *s;
2244 flagword flags;
2245
2246 htab = ppc_elf_hash_table (info);
2247
2248 if (htab->got == NULL
2249 && !ppc_elf_create_got (abfd, info))
2250 return FALSE;
2251
2252 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2253 return FALSE;
2254
2255 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2256 | SEC_LINKER_CREATED);
2257
2258 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2259 htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
2260 if (s == NULL
2261 || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
2262 return FALSE;
2263
2264 if (! info->shared)
2265 {
2266 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2267 htab->relsbss = s = bfd_make_section (abfd, ".rela.sbss");
2268 if (s == NULL
2269 || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
2270 || ! bfd_set_section_alignment (abfd, s, 2))
2271 return FALSE;
2272 }
2273
2274 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2275 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2276 if (s == NULL)
2277 abort ();
2278
2279 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED;
2280 return bfd_set_section_flags (abfd, s, flags);
2281 }
2282
2283 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2284
2285 static void
2286 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
2287 struct elf_link_hash_entry *dir,
2288 struct elf_link_hash_entry *ind)
2289 {
2290 struct ppc_elf_link_hash_entry *edir, *eind;
2291
2292 edir = (struct ppc_elf_link_hash_entry *) dir;
2293 eind = (struct ppc_elf_link_hash_entry *) ind;
2294
2295 if (eind->dyn_relocs != NULL)
2296 {
2297 if (edir->dyn_relocs != NULL)
2298 {
2299 struct ppc_elf_dyn_relocs **pp;
2300 struct ppc_elf_dyn_relocs *p;
2301
2302 if (ind->root.type == bfd_link_hash_indirect)
2303 abort ();
2304
2305 /* Add reloc counts against the weak sym to the strong sym
2306 list. Merge any entries against the same section. */
2307 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2308 {
2309 struct ppc_elf_dyn_relocs *q;
2310
2311 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2312 if (q->sec == p->sec)
2313 {
2314 q->pc_count += p->pc_count;
2315 q->count += p->count;
2316 *pp = p->next;
2317 break;
2318 }
2319 if (q == NULL)
2320 pp = &p->next;
2321 }
2322 *pp = edir->dyn_relocs;
2323 }
2324
2325 edir->dyn_relocs = eind->dyn_relocs;
2326 eind->dyn_relocs = NULL;
2327 }
2328
2329 edir->tls_mask |= eind->tls_mask;
2330
2331 if (ELIMINATE_COPY_RELOCS
2332 && ind->root.type != bfd_link_hash_indirect
2333 && dir->dynamic_adjusted)
2334 {
2335 /* If called to transfer flags for a weakdef during processing
2336 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2337 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2338 dir->ref_dynamic |= ind->ref_dynamic;
2339 dir->ref_regular |= ind->ref_regular;
2340 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
2341 dir->needs_plt |= ind->needs_plt;
2342 }
2343 else
2344 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
2345 }
2346
2347 /* Return 1 if target is one of ours. */
2348
2349 static bfd_boolean
2350 is_ppc_elf_target (const struct bfd_target *targ)
2351 {
2352 extern const bfd_target bfd_elf32_powerpc_vec;
2353 extern const bfd_target bfd_elf32_powerpcle_vec;
2354
2355 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2356 }
2357
2358 /* Hook called by the linker routine which adds symbols from an object
2359 file. We use it to put .comm items in .sbss, and not .bss. */
2360
2361 static bfd_boolean
2362 ppc_elf_add_symbol_hook (bfd *abfd,
2363 struct bfd_link_info *info,
2364 Elf_Internal_Sym *sym,
2365 const char **namep ATTRIBUTE_UNUSED,
2366 flagword *flagsp ATTRIBUTE_UNUSED,
2367 asection **secp,
2368 bfd_vma *valp)
2369 {
2370 if (sym->st_shndx == SHN_COMMON
2371 && !info->relocatable
2372 && sym->st_size <= elf_gp_size (abfd)
2373 && is_ppc_elf_target (info->hash->creator))
2374 {
2375 /* Common symbols less than or equal to -G nn bytes are automatically
2376 put into .sbss. */
2377 struct ppc_elf_link_hash_table *htab;
2378
2379 htab = ppc_elf_hash_table (info);
2380 if (htab->sbss == NULL)
2381 {
2382 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2383
2384 if (!htab->elf.dynobj)
2385 htab->elf.dynobj = abfd;
2386
2387 htab->sbss = bfd_make_section_anyway (htab->elf.dynobj, ".sbss");
2388 if (htab->sbss == NULL
2389 || ! bfd_set_section_flags (htab->elf.dynobj, htab->sbss, flags))
2390 return FALSE;
2391 }
2392
2393 *secp = htab->sbss;
2394 *valp = sym->st_size;
2395 }
2396
2397 return TRUE;
2398 }
2399 \f
2400 /* Create a special linker section. */
2401
2402 static bfd_boolean
2403 ppc_elf_create_linker_section (bfd *abfd,
2404 struct bfd_link_info *info,
2405 flagword flags,
2406 elf_linker_section_t *lsect)
2407 {
2408 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2409 asection *s;
2410
2411 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2412 | SEC_LINKER_CREATED);
2413
2414 /* Record the first bfd that needs the special sections. */
2415 if (!htab->elf.dynobj)
2416 htab->elf.dynobj = abfd;
2417
2418 s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
2419 if (s == NULL
2420 || !bfd_set_section_flags (htab->elf.dynobj, s, flags)
2421 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2422 return FALSE;
2423 lsect->section = s;
2424
2425 return TRUE;
2426 }
2427
2428 /* Find a linker generated pointer with a given addend and type. */
2429
2430 static elf_linker_section_pointers_t *
2431 elf_find_pointer_linker_section
2432 (elf_linker_section_pointers_t *linker_pointers,
2433 bfd_vma addend,
2434 elf_linker_section_t *lsect)
2435 {
2436 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2437 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2438 return linker_pointers;
2439
2440 return NULL;
2441 }
2442
2443 /* Allocate a pointer to live in a linker created section. */
2444
2445 static bfd_boolean
2446 elf_create_pointer_linker_section (bfd *abfd,
2447 elf_linker_section_t *lsect,
2448 struct elf_link_hash_entry *h,
2449 const Elf_Internal_Rela *rel)
2450 {
2451 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2452 elf_linker_section_pointers_t *linker_section_ptr;
2453 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2454 bfd_size_type amt;
2455
2456 BFD_ASSERT (lsect != NULL);
2457
2458 /* Is this a global symbol? */
2459 if (h != NULL)
2460 {
2461 struct ppc_elf_link_hash_entry *eh;
2462
2463 /* Has this symbol already been allocated? If so, our work is done. */
2464 eh = (struct ppc_elf_link_hash_entry *) h;
2465 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2466 rel->r_addend,
2467 lsect))
2468 return TRUE;
2469
2470 ptr_linker_section_ptr = &eh->linker_section_pointer;
2471 }
2472 else
2473 {
2474 /* Allocation of a pointer to a local symbol. */
2475 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2476
2477 /* Allocate a table to hold the local symbols if first time. */
2478 if (!ptr)
2479 {
2480 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2481
2482 amt = num_symbols;
2483 amt *= sizeof (elf_linker_section_pointers_t *);
2484 ptr = bfd_zalloc (abfd, amt);
2485
2486 if (!ptr)
2487 return FALSE;
2488
2489 elf_local_ptr_offsets (abfd) = ptr;
2490 }
2491
2492 /* Has this symbol already been allocated? If so, our work is done. */
2493 if (elf_find_pointer_linker_section (ptr[r_symndx],
2494 rel->r_addend,
2495 lsect))
2496 return TRUE;
2497
2498 ptr_linker_section_ptr = &ptr[r_symndx];
2499 }
2500
2501 /* Allocate space for a pointer in the linker section, and allocate
2502 a new pointer record from internal memory. */
2503 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2504 amt = sizeof (elf_linker_section_pointers_t);
2505 linker_section_ptr = bfd_alloc (abfd, amt);
2506
2507 if (!linker_section_ptr)
2508 return FALSE;
2509
2510 linker_section_ptr->next = *ptr_linker_section_ptr;
2511 linker_section_ptr->addend = rel->r_addend;
2512 linker_section_ptr->lsect = lsect;
2513 *ptr_linker_section_ptr = linker_section_ptr;
2514
2515 linker_section_ptr->offset = lsect->section->size;
2516 lsect->section->size += 4;
2517
2518 #ifdef DEBUG
2519 fprintf (stderr,
2520 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2521 lsect->name, (long) linker_section_ptr->offset,
2522 (long) lsect->section->size);
2523 #endif
2524
2525 return TRUE;
2526 }
2527
2528 static bfd_boolean
2529 update_local_sym_info (bfd *abfd,
2530 Elf_Internal_Shdr *symtab_hdr,
2531 unsigned long r_symndx,
2532 int tls_type)
2533 {
2534 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2535 char *local_got_tls_masks;
2536
2537 if (local_got_refcounts == NULL)
2538 {
2539 bfd_size_type size = symtab_hdr->sh_info;
2540
2541 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2542 local_got_refcounts = bfd_zalloc (abfd, size);
2543 if (local_got_refcounts == NULL)
2544 return FALSE;
2545 elf_local_got_refcounts (abfd) = local_got_refcounts;
2546 }
2547
2548 local_got_refcounts[r_symndx] += 1;
2549 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2550 local_got_tls_masks[r_symndx] |= tls_type;
2551 return TRUE;
2552 }
2553
2554 static void
2555 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2556 {
2557 (*_bfd_error_handler)
2558 (_("%B: relocation %s cannot be used when making a shared object"),
2559 abfd,
2560 ppc_elf_howto_table[r_type]->name);
2561 bfd_set_error (bfd_error_bad_value);
2562 }
2563
2564 /* Look through the relocs for a section during the first phase, and
2565 allocate space in the global offset table or procedure linkage
2566 table. */
2567
2568 static bfd_boolean
2569 ppc_elf_check_relocs (bfd *abfd,
2570 struct bfd_link_info *info,
2571 asection *sec,
2572 const Elf_Internal_Rela *relocs)
2573 {
2574 struct ppc_elf_link_hash_table *htab;
2575 Elf_Internal_Shdr *symtab_hdr;
2576 struct elf_link_hash_entry **sym_hashes;
2577 const Elf_Internal_Rela *rel;
2578 const Elf_Internal_Rela *rel_end;
2579 asection *sreloc;
2580
2581 if (info->relocatable)
2582 return TRUE;
2583
2584 #ifdef DEBUG
2585 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2586 sec, abfd);
2587 #endif
2588
2589 /* Initialize howto table if not already done. */
2590 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2591 ppc_elf_howto_init ();
2592
2593 htab = ppc_elf_hash_table (info);
2594 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2595 sym_hashes = elf_sym_hashes (abfd);
2596 sreloc = NULL;
2597
2598 rel_end = relocs + sec->reloc_count;
2599 for (rel = relocs; rel < rel_end; rel++)
2600 {
2601 unsigned long r_symndx;
2602 enum elf_ppc_reloc_type r_type;
2603 struct elf_link_hash_entry *h;
2604 int tls_type = 0;
2605
2606 r_symndx = ELF32_R_SYM (rel->r_info);
2607 if (r_symndx < symtab_hdr->sh_info)
2608 h = NULL;
2609 else
2610 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2611
2612 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
2613 This shows up in particular in an R_PPC_ADDR32 in the eabi
2614 startup code. */
2615 if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2616 {
2617 if (htab->got == NULL)
2618 {
2619 if (htab->elf.dynobj == NULL)
2620 htab->elf.dynobj = abfd;
2621 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2622 return FALSE;
2623 }
2624 }
2625
2626 r_type = ELF32_R_TYPE (rel->r_info);
2627 switch (r_type)
2628 {
2629 case R_PPC_GOT_TLSLD16:
2630 case R_PPC_GOT_TLSLD16_LO:
2631 case R_PPC_GOT_TLSLD16_HI:
2632 case R_PPC_GOT_TLSLD16_HA:
2633 htab->tlsld_got.refcount += 1;
2634 tls_type = TLS_TLS | TLS_LD;
2635 goto dogottls;
2636
2637 case R_PPC_GOT_TLSGD16:
2638 case R_PPC_GOT_TLSGD16_LO:
2639 case R_PPC_GOT_TLSGD16_HI:
2640 case R_PPC_GOT_TLSGD16_HA:
2641 tls_type = TLS_TLS | TLS_GD;
2642 goto dogottls;
2643
2644 case R_PPC_GOT_TPREL16:
2645 case R_PPC_GOT_TPREL16_LO:
2646 case R_PPC_GOT_TPREL16_HI:
2647 case R_PPC_GOT_TPREL16_HA:
2648 if (info->shared)
2649 info->flags |= DF_STATIC_TLS;
2650 tls_type = TLS_TLS | TLS_TPREL;
2651 goto dogottls;
2652
2653 case R_PPC_GOT_DTPREL16:
2654 case R_PPC_GOT_DTPREL16_LO:
2655 case R_PPC_GOT_DTPREL16_HI:
2656 case R_PPC_GOT_DTPREL16_HA:
2657 tls_type = TLS_TLS | TLS_DTPREL;
2658 dogottls:
2659 sec->has_tls_reloc = 1;
2660 /* Fall thru */
2661
2662 /* GOT16 relocations */
2663 case R_PPC_GOT16:
2664 case R_PPC_GOT16_LO:
2665 case R_PPC_GOT16_HI:
2666 case R_PPC_GOT16_HA:
2667 /* This symbol requires a global offset table entry. */
2668 if (htab->got == NULL)
2669 {
2670 if (htab->elf.dynobj == NULL)
2671 htab->elf.dynobj = abfd;
2672 if (!ppc_elf_create_got (htab->elf.dynobj, info))
2673 return FALSE;
2674 }
2675 if (h != NULL)
2676 {
2677 h->got.refcount += 1;
2678 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
2679 }
2680 else
2681 /* This is a global offset table entry for a local symbol. */
2682 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
2683 return FALSE;
2684 break;
2685
2686 /* Indirect .sdata relocation. */
2687 case R_PPC_EMB_SDAI16:
2688 if (info->shared)
2689 {
2690 bad_shared_reloc (abfd, r_type);
2691 return FALSE;
2692 }
2693 if (htab->sdata[0].section == NULL
2694 && !ppc_elf_create_linker_section (abfd, info, 0,
2695 &htab->sdata[0]))
2696 return FALSE;
2697 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
2698 h, rel))
2699 return FALSE;
2700 break;
2701
2702 /* Indirect .sdata2 relocation. */
2703 case R_PPC_EMB_SDA2I16:
2704 if (info->shared)
2705 {
2706 bad_shared_reloc (abfd, r_type);
2707 return FALSE;
2708 }
2709 if (htab->sdata[1].section == NULL
2710 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
2711 &htab->sdata[1]))
2712 return FALSE;
2713 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
2714 h, rel))
2715 return FALSE;
2716 break;
2717
2718 case R_PPC_SDAREL16:
2719 case R_PPC_EMB_SDA2REL:
2720 case R_PPC_EMB_SDA21:
2721 case R_PPC_EMB_RELSDA:
2722 case R_PPC_EMB_NADDR32:
2723 case R_PPC_EMB_NADDR16:
2724 case R_PPC_EMB_NADDR16_LO:
2725 case R_PPC_EMB_NADDR16_HI:
2726 case R_PPC_EMB_NADDR16_HA:
2727 if (info->shared)
2728 {
2729 bad_shared_reloc (abfd, r_type);
2730 return FALSE;
2731 }
2732 break;
2733
2734 case R_PPC_PLT32:
2735 case R_PPC_PLTREL24:
2736 case R_PPC_PLTREL32:
2737 case R_PPC_PLT16_LO:
2738 case R_PPC_PLT16_HI:
2739 case R_PPC_PLT16_HA:
2740 #ifdef DEBUG
2741 fprintf (stderr, "Reloc requires a PLT entry\n");
2742 #endif
2743 /* This symbol requires a procedure linkage table entry. We
2744 actually build the entry in finish_dynamic_symbol,
2745 because this might be a case of linking PIC code without
2746 linking in any dynamic objects, in which case we don't
2747 need to generate a procedure linkage table after all. */
2748
2749 if (h == NULL)
2750 {
2751 /* It does not make sense to have a procedure linkage
2752 table entry for a local symbol. */
2753 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
2754 "local symbol"),
2755 abfd,
2756 sec,
2757 (long) rel->r_offset,
2758 ppc_elf_howto_table[r_type]->name);
2759 bfd_set_error (bfd_error_bad_value);
2760 return FALSE;
2761 }
2762
2763 h->needs_plt = 1;
2764 h->plt.refcount++;
2765 break;
2766
2767 /* The following relocations don't need to propagate the
2768 relocation if linking a shared object since they are
2769 section relative. */
2770 case R_PPC_SECTOFF:
2771 case R_PPC_SECTOFF_LO:
2772 case R_PPC_SECTOFF_HI:
2773 case R_PPC_SECTOFF_HA:
2774 case R_PPC_DTPREL16:
2775 case R_PPC_DTPREL16_LO:
2776 case R_PPC_DTPREL16_HI:
2777 case R_PPC_DTPREL16_HA:
2778 case R_PPC_TOC16:
2779 break;
2780
2781 /* This are just markers. */
2782 case R_PPC_TLS:
2783 case R_PPC_EMB_MRKREF:
2784 case R_PPC_NONE:
2785 case R_PPC_max:
2786 break;
2787
2788 /* These should only appear in dynamic objects. */
2789 case R_PPC_COPY:
2790 case R_PPC_GLOB_DAT:
2791 case R_PPC_JMP_SLOT:
2792 case R_PPC_RELATIVE:
2793 break;
2794
2795 /* These aren't handled yet. We'll report an error later. */
2796 case R_PPC_ADDR30:
2797 case R_PPC_EMB_RELSEC16:
2798 case R_PPC_EMB_RELST_LO:
2799 case R_PPC_EMB_RELST_HI:
2800 case R_PPC_EMB_RELST_HA:
2801 case R_PPC_EMB_BIT_FLD:
2802 break;
2803
2804 /* This refers only to functions defined in the shared library. */
2805 case R_PPC_LOCAL24PC:
2806 break;
2807
2808 /* This relocation describes the C++ object vtable hierarchy.
2809 Reconstruct it for later use during GC. */
2810 case R_PPC_GNU_VTINHERIT:
2811 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2812 return FALSE;
2813 break;
2814
2815 /* This relocation describes which C++ vtable entries are actually
2816 used. Record for later use during GC. */
2817 case R_PPC_GNU_VTENTRY:
2818 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2819 return FALSE;
2820 break;
2821
2822 /* We shouldn't really be seeing these. */
2823 case R_PPC_TPREL32:
2824 if (info->shared)
2825 info->flags |= DF_STATIC_TLS;
2826 goto dodyn;
2827
2828 /* Nor these. */
2829 case R_PPC_DTPMOD32:
2830 case R_PPC_DTPREL32:
2831 goto dodyn;
2832
2833 case R_PPC_TPREL16:
2834 case R_PPC_TPREL16_LO:
2835 case R_PPC_TPREL16_HI:
2836 case R_PPC_TPREL16_HA:
2837 if (info->shared)
2838 info->flags |= DF_STATIC_TLS;
2839 goto dodyn;
2840
2841 /* When creating a shared object, we must copy these
2842 relocs into the output file. We create a reloc
2843 section in dynobj and make room for the reloc. */
2844 case R_PPC_REL24:
2845 case R_PPC_REL14:
2846 case R_PPC_REL14_BRTAKEN:
2847 case R_PPC_REL14_BRNTAKEN:
2848 case R_PPC_REL32:
2849 if (h == NULL
2850 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2851 break;
2852 /* fall through */
2853
2854 case R_PPC_ADDR32:
2855 case R_PPC_ADDR24:
2856 case R_PPC_ADDR16:
2857 case R_PPC_ADDR16_LO:
2858 case R_PPC_ADDR16_HI:
2859 case R_PPC_ADDR16_HA:
2860 case R_PPC_ADDR14:
2861 case R_PPC_ADDR14_BRTAKEN:
2862 case R_PPC_ADDR14_BRNTAKEN:
2863 case R_PPC_UADDR32:
2864 case R_PPC_UADDR16:
2865 if (h != NULL && !info->shared)
2866 {
2867 /* We may need a plt entry if the symbol turns out to be
2868 a function defined in a dynamic object. */
2869 h->plt.refcount++;
2870
2871 /* We may need a copy reloc too. */
2872 h->non_got_ref = 1;
2873 }
2874
2875 dodyn:
2876 /* If we are creating a shared library, and this is a reloc
2877 against a global symbol, or a non PC relative reloc
2878 against a local symbol, then we need to copy the reloc
2879 into the shared library. However, if we are linking with
2880 -Bsymbolic, we do not need to copy a reloc against a
2881 global symbol which is defined in an object we are
2882 including in the link (i.e., DEF_REGULAR is set). At
2883 this point we have not seen all the input files, so it is
2884 possible that DEF_REGULAR is not set now but will be set
2885 later (it is never cleared). In case of a weak definition,
2886 DEF_REGULAR may be cleared later by a strong definition in
2887 a shared library. We account for that possibility below by
2888 storing information in the dyn_relocs field of the hash
2889 table entry. A similar situation occurs when creating
2890 shared libraries and symbol visibility changes render the
2891 symbol local.
2892
2893 If on the other hand, we are creating an executable, we
2894 may need to keep relocations for symbols satisfied by a
2895 dynamic library if we manage to avoid copy relocs for the
2896 symbol. */
2897 if ((info->shared
2898 && (MUST_BE_DYN_RELOC (r_type)
2899 || (h != NULL
2900 && (! info->symbolic
2901 || h->root.type == bfd_link_hash_defweak
2902 || !h->def_regular))))
2903 || (ELIMINATE_COPY_RELOCS
2904 && !info->shared
2905 && (sec->flags & SEC_ALLOC) != 0
2906 && h != NULL
2907 && (h->root.type == bfd_link_hash_defweak
2908 || !h->def_regular)))
2909 {
2910 struct ppc_elf_dyn_relocs *p;
2911 struct ppc_elf_dyn_relocs **head;
2912
2913 #ifdef DEBUG
2914 fprintf (stderr,
2915 "ppc_elf_check_relocs needs to "
2916 "create relocation for %s\n",
2917 (h && h->root.root.string
2918 ? h->root.root.string : "<unknown>"));
2919 #endif
2920 if (sreloc == NULL)
2921 {
2922 const char *name;
2923
2924 name = (bfd_elf_string_from_elf_section
2925 (abfd,
2926 elf_elfheader (abfd)->e_shstrndx,
2927 elf_section_data (sec)->rel_hdr.sh_name));
2928 if (name == NULL)
2929 return FALSE;
2930
2931 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2932 && strcmp (bfd_get_section_name (abfd, sec),
2933 name + 5) == 0);
2934
2935 if (htab->elf.dynobj == NULL)
2936 htab->elf.dynobj = abfd;
2937 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
2938 if (sreloc == NULL)
2939 {
2940 flagword flags;
2941
2942 sreloc = bfd_make_section (htab->elf.dynobj, name);
2943 flags = (SEC_HAS_CONTENTS | SEC_READONLY
2944 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2945 if ((sec->flags & SEC_ALLOC) != 0)
2946 flags |= SEC_ALLOC | SEC_LOAD;
2947 if (sreloc == NULL
2948 || ! bfd_set_section_flags (htab->elf.dynobj,
2949 sreloc, flags)
2950 || ! bfd_set_section_alignment (htab->elf.dynobj,
2951 sreloc, 2))
2952 return FALSE;
2953 }
2954 elf_section_data (sec)->sreloc = sreloc;
2955 }
2956
2957 /* If this is a global symbol, we count the number of
2958 relocations we need for this symbol. */
2959 if (h != NULL)
2960 {
2961 head = &ppc_elf_hash_entry (h)->dyn_relocs;
2962 }
2963 else
2964 {
2965 /* Track dynamic relocs needed for local syms too.
2966 We really need local syms available to do this
2967 easily. Oh well. */
2968
2969 asection *s;
2970 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
2971 sec, r_symndx);
2972 if (s == NULL)
2973 return FALSE;
2974
2975 head = ((struct ppc_elf_dyn_relocs **)
2976 &elf_section_data (s)->local_dynrel);
2977 }
2978
2979 p = *head;
2980 if (p == NULL || p->sec != sec)
2981 {
2982 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
2983 if (p == NULL)
2984 return FALSE;
2985 p->next = *head;
2986 *head = p;
2987 p->sec = sec;
2988 p->count = 0;
2989 p->pc_count = 0;
2990 }
2991
2992 p->count += 1;
2993 if (!MUST_BE_DYN_RELOC (r_type))
2994 p->pc_count += 1;
2995 }
2996
2997 break;
2998 }
2999 }
3000
3001 return TRUE;
3002 }
3003 \f
3004 /* Merge backend specific data from an object file to the output
3005 object file when linking. */
3006
3007 static bfd_boolean
3008 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3009 {
3010 flagword old_flags;
3011 flagword new_flags;
3012 bfd_boolean error;
3013
3014 if (!is_ppc_elf_target (ibfd->xvec)
3015 || !is_ppc_elf_target (obfd->xvec))
3016 return TRUE;
3017
3018 /* Check if we have the same endianess. */
3019 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3020 return FALSE;
3021
3022 new_flags = elf_elfheader (ibfd)->e_flags;
3023 old_flags = elf_elfheader (obfd)->e_flags;
3024 if (!elf_flags_init (obfd))
3025 {
3026 /* First call, no flags set. */
3027 elf_flags_init (obfd) = TRUE;
3028 elf_elfheader (obfd)->e_flags = new_flags;
3029 }
3030
3031 /* Compatible flags are ok. */
3032 else if (new_flags == old_flags)
3033 ;
3034
3035 /* Incompatible flags. */
3036 else
3037 {
3038 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3039 to be linked with either. */
3040 error = FALSE;
3041 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3042 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3043 {
3044 error = TRUE;
3045 (*_bfd_error_handler)
3046 (_("%B: compiled with -mrelocatable and linked with "
3047 "modules compiled normally"), ibfd);
3048 }
3049 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3050 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3051 {
3052 error = TRUE;
3053 (*_bfd_error_handler)
3054 (_("%B: compiled normally and linked with "
3055 "modules compiled with -mrelocatable"), ibfd);
3056 }
3057
3058 /* The output is -mrelocatable-lib iff both the input files are. */
3059 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3060 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3061
3062 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3063 but each input file is either -mrelocatable or -mrelocatable-lib. */
3064 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3065 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3066 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3067 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3068
3069 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3070 any module uses it. */
3071 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3072
3073 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3074 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3075
3076 /* Warn about any other mismatches. */
3077 if (new_flags != old_flags)
3078 {
3079 error = TRUE;
3080 (*_bfd_error_handler)
3081 (_("%B: uses different e_flags (0x%lx) fields "
3082 "than previous modules (0x%lx)"),
3083 ibfd, (long) new_flags, (long) old_flags);
3084 }
3085
3086 if (error)
3087 {
3088 bfd_set_error (bfd_error_bad_value);
3089 return FALSE;
3090 }
3091 }
3092
3093 return TRUE;
3094 }
3095 \f
3096 /* Return the section that should be marked against GC for a given
3097 relocation. */
3098
3099 static asection *
3100 ppc_elf_gc_mark_hook (asection *sec,
3101 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3102 Elf_Internal_Rela *rel,
3103 struct elf_link_hash_entry *h,
3104 Elf_Internal_Sym *sym)
3105 {
3106 if (h != NULL)
3107 {
3108 switch (ELF32_R_TYPE (rel->r_info))
3109 {
3110 case R_PPC_GNU_VTINHERIT:
3111 case R_PPC_GNU_VTENTRY:
3112 break;
3113
3114 default:
3115 switch (h->root.type)
3116 {
3117 case bfd_link_hash_defined:
3118 case bfd_link_hash_defweak:
3119 return h->root.u.def.section;
3120
3121 case bfd_link_hash_common:
3122 return h->root.u.c.p->section;
3123
3124 default:
3125 break;
3126 }
3127 }
3128 }
3129 else
3130 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3131
3132 return NULL;
3133 }
3134
3135 /* Update the got, plt and dynamic reloc reference counts for the
3136 section being removed. */
3137
3138 static bfd_boolean
3139 ppc_elf_gc_sweep_hook (bfd *abfd,
3140 struct bfd_link_info *info,
3141 asection *sec,
3142 const Elf_Internal_Rela *relocs)
3143 {
3144 struct ppc_elf_link_hash_table *htab;
3145 Elf_Internal_Shdr *symtab_hdr;
3146 struct elf_link_hash_entry **sym_hashes;
3147 bfd_signed_vma *local_got_refcounts;
3148 const Elf_Internal_Rela *rel, *relend;
3149
3150 elf_section_data (sec)->local_dynrel = NULL;
3151
3152 htab = ppc_elf_hash_table (info);
3153 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3154 sym_hashes = elf_sym_hashes (abfd);
3155 local_got_refcounts = elf_local_got_refcounts (abfd);
3156
3157 relend = relocs + sec->reloc_count;
3158 for (rel = relocs; rel < relend; rel++)
3159 {
3160 unsigned long r_symndx;
3161 enum elf_ppc_reloc_type r_type;
3162 struct elf_link_hash_entry *h = NULL;
3163
3164 r_symndx = ELF32_R_SYM (rel->r_info);
3165 if (r_symndx >= symtab_hdr->sh_info)
3166 {
3167 struct ppc_elf_dyn_relocs **pp, *p;
3168 struct ppc_elf_link_hash_entry *eh;
3169
3170 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3171 while (h->root.type == bfd_link_hash_indirect
3172 || h->root.type == bfd_link_hash_warning)
3173 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3174 eh = (struct ppc_elf_link_hash_entry *) h;
3175
3176 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3177 if (p->sec == sec)
3178 {
3179 /* Everything must go for SEC. */
3180 *pp = p->next;
3181 break;
3182 }
3183 }
3184
3185 r_type = ELF32_R_TYPE (rel->r_info);
3186 switch (r_type)
3187 {
3188 case R_PPC_GOT_TLSLD16:
3189 case R_PPC_GOT_TLSLD16_LO:
3190 case R_PPC_GOT_TLSLD16_HI:
3191 case R_PPC_GOT_TLSLD16_HA:
3192 htab->tlsld_got.refcount -= 1;
3193 /* Fall thru */
3194
3195 case R_PPC_GOT_TLSGD16:
3196 case R_PPC_GOT_TLSGD16_LO:
3197 case R_PPC_GOT_TLSGD16_HI:
3198 case R_PPC_GOT_TLSGD16_HA:
3199 case R_PPC_GOT_TPREL16:
3200 case R_PPC_GOT_TPREL16_LO:
3201 case R_PPC_GOT_TPREL16_HI:
3202 case R_PPC_GOT_TPREL16_HA:
3203 case R_PPC_GOT_DTPREL16:
3204 case R_PPC_GOT_DTPREL16_LO:
3205 case R_PPC_GOT_DTPREL16_HI:
3206 case R_PPC_GOT_DTPREL16_HA:
3207 case R_PPC_GOT16:
3208 case R_PPC_GOT16_LO:
3209 case R_PPC_GOT16_HI:
3210 case R_PPC_GOT16_HA:
3211 if (h != NULL)
3212 {
3213 if (h->got.refcount > 0)
3214 h->got.refcount--;
3215 }
3216 else if (local_got_refcounts != NULL)
3217 {
3218 if (local_got_refcounts[r_symndx] > 0)
3219 local_got_refcounts[r_symndx]--;
3220 }
3221 break;
3222
3223 case R_PPC_REL24:
3224 case R_PPC_REL14:
3225 case R_PPC_REL14_BRTAKEN:
3226 case R_PPC_REL14_BRNTAKEN:
3227 case R_PPC_REL32:
3228 if (h == NULL
3229 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3230 break;
3231 /* Fall thru */
3232
3233 case R_PPC_ADDR32:
3234 case R_PPC_ADDR24:
3235 case R_PPC_ADDR16:
3236 case R_PPC_ADDR16_LO:
3237 case R_PPC_ADDR16_HI:
3238 case R_PPC_ADDR16_HA:
3239 case R_PPC_ADDR14:
3240 case R_PPC_ADDR14_BRTAKEN:
3241 case R_PPC_ADDR14_BRNTAKEN:
3242 case R_PPC_UADDR32:
3243 case R_PPC_UADDR16:
3244 case R_PPC_PLT32:
3245 case R_PPC_PLTREL24:
3246 case R_PPC_PLT16_LO:
3247 case R_PPC_PLT16_HI:
3248 case R_PPC_PLT16_HA:
3249 if (h != NULL)
3250 {
3251 if (h->plt.refcount > 0)
3252 h->plt.refcount--;
3253 }
3254 break;
3255
3256 default:
3257 break;
3258 }
3259 }
3260 return TRUE;
3261 }
3262 \f
3263 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3264
3265 asection *
3266 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3267 {
3268 struct ppc_elf_link_hash_table *htab;
3269
3270 htab = ppc_elf_hash_table (info);
3271 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3272 FALSE, FALSE, TRUE);
3273
3274 return _bfd_elf_tls_setup (obfd, info);
3275 }
3276
3277 /* Run through all the TLS relocs looking for optimization
3278 opportunities. */
3279
3280 bfd_boolean
3281 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3282 struct bfd_link_info *info)
3283 {
3284 bfd *ibfd;
3285 asection *sec;
3286 struct ppc_elf_link_hash_table *htab;
3287
3288 if (info->relocatable || info->shared)
3289 return TRUE;
3290
3291 htab = ppc_elf_hash_table (info);
3292 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3293 {
3294 Elf_Internal_Sym *locsyms = NULL;
3295 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3296
3297 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3298 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3299 {
3300 Elf_Internal_Rela *relstart, *rel, *relend;
3301 int expecting_tls_get_addr;
3302
3303 /* Read the relocations. */
3304 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3305 info->keep_memory);
3306 if (relstart == NULL)
3307 return FALSE;
3308
3309 expecting_tls_get_addr = 0;
3310 relend = relstart + sec->reloc_count;
3311 for (rel = relstart; rel < relend; rel++)
3312 {
3313 enum elf_ppc_reloc_type r_type;
3314 unsigned long r_symndx;
3315 struct elf_link_hash_entry *h = NULL;
3316 char *tls_mask;
3317 char tls_set, tls_clear;
3318 bfd_boolean is_local;
3319
3320 r_symndx = ELF32_R_SYM (rel->r_info);
3321 if (r_symndx >= symtab_hdr->sh_info)
3322 {
3323 struct elf_link_hash_entry **sym_hashes;
3324
3325 sym_hashes = elf_sym_hashes (ibfd);
3326 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3327 while (h->root.type == bfd_link_hash_indirect
3328 || h->root.type == bfd_link_hash_warning)
3329 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3330 }
3331
3332 is_local = FALSE;
3333 if (h == NULL
3334 || !h->def_dynamic)
3335 is_local = TRUE;
3336
3337 r_type = ELF32_R_TYPE (rel->r_info);
3338 switch (r_type)
3339 {
3340 case R_PPC_GOT_TLSLD16:
3341 case R_PPC_GOT_TLSLD16_LO:
3342 case R_PPC_GOT_TLSLD16_HI:
3343 case R_PPC_GOT_TLSLD16_HA:
3344 /* These relocs should never be against a symbol
3345 defined in a shared lib. Leave them alone if
3346 that turns out to be the case. */
3347 expecting_tls_get_addr = 0;
3348 htab->tlsld_got.refcount -= 1;
3349 if (!is_local)
3350 continue;
3351
3352 /* LD -> LE */
3353 tls_set = 0;
3354 tls_clear = TLS_LD;
3355 expecting_tls_get_addr = 1;
3356 break;
3357
3358 case R_PPC_GOT_TLSGD16:
3359 case R_PPC_GOT_TLSGD16_LO:
3360 case R_PPC_GOT_TLSGD16_HI:
3361 case R_PPC_GOT_TLSGD16_HA:
3362 if (is_local)
3363 /* GD -> LE */
3364 tls_set = 0;
3365 else
3366 /* GD -> IE */
3367 tls_set = TLS_TLS | TLS_TPRELGD;
3368 tls_clear = TLS_GD;
3369 expecting_tls_get_addr = 1;
3370 break;
3371
3372 case R_PPC_GOT_TPREL16:
3373 case R_PPC_GOT_TPREL16_LO:
3374 case R_PPC_GOT_TPREL16_HI:
3375 case R_PPC_GOT_TPREL16_HA:
3376 expecting_tls_get_addr = 0;
3377 if (is_local)
3378 {
3379 /* IE -> LE */
3380 tls_set = 0;
3381 tls_clear = TLS_TPREL;
3382 break;
3383 }
3384 else
3385 continue;
3386
3387 case R_PPC_REL14:
3388 case R_PPC_REL14_BRTAKEN:
3389 case R_PPC_REL14_BRNTAKEN:
3390 case R_PPC_REL24:
3391 if (expecting_tls_get_addr
3392 && h != NULL
3393 && h == htab->tls_get_addr)
3394 {
3395 if (h->plt.refcount > 0)
3396 h->plt.refcount -= 1;
3397 }
3398 expecting_tls_get_addr = 0;
3399 continue;
3400
3401 default:
3402 expecting_tls_get_addr = 0;
3403 continue;
3404 }
3405
3406 if (h != NULL)
3407 {
3408 if (tls_set == 0)
3409 {
3410 /* We managed to get rid of a got entry. */
3411 if (h->got.refcount > 0)
3412 h->got.refcount -= 1;
3413 }
3414 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3415 }
3416 else
3417 {
3418 Elf_Internal_Sym *sym;
3419 bfd_signed_vma *lgot_refs;
3420 char *lgot_masks;
3421
3422 if (locsyms == NULL)
3423 {
3424 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3425 if (locsyms == NULL)
3426 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3427 symtab_hdr->sh_info,
3428 0, NULL, NULL, NULL);
3429 if (locsyms == NULL)
3430 {
3431 if (elf_section_data (sec)->relocs != relstart)
3432 free (relstart);
3433 return FALSE;
3434 }
3435 }
3436 sym = locsyms + r_symndx;
3437 lgot_refs = elf_local_got_refcounts (ibfd);
3438 if (lgot_refs == NULL)
3439 abort ();
3440 if (tls_set == 0)
3441 {
3442 /* We managed to get rid of a got entry. */
3443 if (lgot_refs[r_symndx] > 0)
3444 lgot_refs[r_symndx] -= 1;
3445 }
3446 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3447 tls_mask = &lgot_masks[r_symndx];
3448 }
3449
3450 *tls_mask |= tls_set;
3451 *tls_mask &= ~tls_clear;
3452 }
3453
3454 if (elf_section_data (sec)->relocs != relstart)
3455 free (relstart);
3456 }
3457
3458 if (locsyms != NULL
3459 && (symtab_hdr->contents != (unsigned char *) locsyms))
3460 {
3461 if (!info->keep_memory)
3462 free (locsyms);
3463 else
3464 symtab_hdr->contents = (unsigned char *) locsyms;
3465 }
3466 }
3467 return TRUE;
3468 }
3469 \f
3470 /* Adjust a symbol defined by a dynamic object and referenced by a
3471 regular object. The current definition is in some section of the
3472 dynamic object, but we're not including those sections. We have to
3473 change the definition to something the rest of the link can
3474 understand. */
3475
3476 static bfd_boolean
3477 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3478 struct elf_link_hash_entry *h)
3479 {
3480 struct ppc_elf_link_hash_table *htab;
3481 asection *s;
3482 unsigned int power_of_two;
3483
3484 #ifdef DEBUG
3485 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3486 h->root.root.string);
3487 #endif
3488
3489 /* Make sure we know what is going on here. */
3490 htab = ppc_elf_hash_table (info);
3491 BFD_ASSERT (htab->elf.dynobj != NULL
3492 && (h->needs_plt
3493 || h->u.weakdef != NULL
3494 || (h->def_dynamic
3495 && h->ref_regular
3496 && !h->def_regular)));
3497
3498 /* Deal with function syms. */
3499 if (h->type == STT_FUNC
3500 || h->needs_plt)
3501 {
3502 /* Clear procedure linkage table information for any symbol that
3503 won't need a .plt entry. */
3504 if (h->plt.refcount <= 0
3505 || SYMBOL_CALLS_LOCAL (info, h)
3506 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3507 && h->root.type == bfd_link_hash_undefweak))
3508 {
3509 /* A PLT entry is not required/allowed when:
3510
3511 1. We are not using ld.so; because then the PLT entry
3512 can't be set up, so we can't use one. In this case,
3513 ppc_elf_adjust_dynamic_symbol won't even be called.
3514
3515 2. GC has rendered the entry unused.
3516
3517 3. We know for certain that a call to this symbol
3518 will go to this object, or will remain undefined. */
3519 h->plt.offset = (bfd_vma) -1;
3520 h->needs_plt = 0;
3521 }
3522 return TRUE;
3523 }
3524 else
3525 h->plt.offset = (bfd_vma) -1;
3526
3527 /* If this is a weak symbol, and there is a real definition, the
3528 processor independent code will have arranged for us to see the
3529 real definition first, and we can just use the same value. */
3530 if (h->u.weakdef != NULL)
3531 {
3532 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3533 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3534 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3535 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3536 if (ELIMINATE_COPY_RELOCS)
3537 h->non_got_ref = h->u.weakdef->non_got_ref;
3538 return TRUE;
3539 }
3540
3541 /* This is a reference to a symbol defined by a dynamic object which
3542 is not a function. */
3543
3544 /* If we are creating a shared library, we must presume that the
3545 only references to the symbol are via the global offset table.
3546 For such cases we need not do anything here; the relocations will
3547 be handled correctly by relocate_section. */
3548 if (info->shared)
3549 return TRUE;
3550
3551 /* If there are no references to this symbol that do not use the
3552 GOT, we don't need to generate a copy reloc. */
3553 if (!h->non_got_ref)
3554 return TRUE;
3555
3556 if (ELIMINATE_COPY_RELOCS)
3557 {
3558 struct ppc_elf_dyn_relocs *p;
3559 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3560 {
3561 s = p->sec->output_section;
3562 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3563 break;
3564 }
3565
3566 /* If we didn't find any dynamic relocs in read-only sections, then
3567 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3568 if (p == NULL)
3569 {
3570 h->non_got_ref = 0;
3571 return TRUE;
3572 }
3573 }
3574
3575 /* We must allocate the symbol in our .dynbss section, which will
3576 become part of the .bss section of the executable. There will be
3577 an entry for this symbol in the .dynsym section. The dynamic
3578 object will contain position independent code, so all references
3579 from the dynamic object to this symbol will go through the global
3580 offset table. The dynamic linker will use the .dynsym entry to
3581 determine the address it must put in the global offset table, so
3582 both the dynamic object and the regular object will refer to the
3583 same memory location for the variable.
3584
3585 Of course, if the symbol is sufficiently small, we must instead
3586 allocate it in .sbss. FIXME: It would be better to do this if and
3587 only if there were actually SDAREL relocs for that symbol. */
3588
3589 if (h->size <= elf_gp_size (htab->elf.dynobj))
3590 s = htab->dynsbss;
3591 else
3592 s = htab->dynbss;
3593 BFD_ASSERT (s != NULL);
3594
3595 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
3596 copy the initial value out of the dynamic object and into the
3597 runtime process image. We need to remember the offset into the
3598 .rela.bss section we are going to use. */
3599 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
3600 {
3601 asection *srel;
3602
3603 if (h->size <= elf_gp_size (htab->elf.dynobj))
3604 srel = htab->relsbss;
3605 else
3606 srel = htab->relbss;
3607 BFD_ASSERT (srel != NULL);
3608 srel->size += sizeof (Elf32_External_Rela);
3609 h->needs_copy = 1;
3610 }
3611
3612 /* We need to figure out the alignment required for this symbol. I
3613 have no idea how ELF linkers handle this. */
3614 power_of_two = bfd_log2 (h->size);
3615 if (power_of_two > 4)
3616 power_of_two = 4;
3617
3618 /* Apply the required alignment. */
3619 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
3620 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
3621 {
3622 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
3623 return FALSE;
3624 }
3625
3626 /* Define the symbol as being at this point in the section. */
3627 h->root.u.def.section = s;
3628 h->root.u.def.value = s->size;
3629
3630 /* Increment the section size to make room for the symbol. */
3631 s->size += h->size;
3632
3633 return TRUE;
3634 }
3635 \f
3636 /* Allocate space in associated reloc sections for dynamic relocs. */
3637
3638 static bfd_boolean
3639 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3640 {
3641 struct bfd_link_info *info = inf;
3642 struct ppc_elf_link_hash_entry *eh;
3643 struct ppc_elf_link_hash_table *htab;
3644 struct ppc_elf_dyn_relocs *p;
3645
3646 if (h->root.type == bfd_link_hash_indirect)
3647 return TRUE;
3648
3649 if (h->root.type == bfd_link_hash_warning)
3650 /* When warning symbols are created, they **replace** the "real"
3651 entry in the hash table, thus we never get to see the real
3652 symbol in a hash traversal. So look at it now. */
3653 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3654
3655 htab = ppc_elf_hash_table (info);
3656 if (htab->elf.dynamic_sections_created
3657 && h->plt.refcount > 0)
3658 {
3659 /* Make sure this symbol is output as a dynamic symbol. */
3660 if (h->dynindx == -1
3661 && !h->forced_local)
3662 {
3663 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3664 return FALSE;
3665 }
3666
3667 if (info->shared
3668 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3669 {
3670 asection *s = htab->plt;
3671
3672 /* If this is the first .plt entry, make room for the special
3673 first entry. */
3674 if (s->size == 0)
3675 s->size += PLT_INITIAL_ENTRY_SIZE;
3676
3677 /* The PowerPC PLT is actually composed of two parts, the
3678 first part is 2 words (for a load and a jump), and then
3679 there is a remaining word available at the end. */
3680 h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
3681 + (PLT_SLOT_SIZE
3682 * ((s->size - PLT_INITIAL_ENTRY_SIZE)
3683 / PLT_ENTRY_SIZE)));
3684
3685 /* If this symbol is not defined in a regular file, and we
3686 are not generating a shared library, then set the symbol
3687 to this location in the .plt. This is required to make
3688 function pointers compare as equal between the normal
3689 executable and the shared library. */
3690 if (! info->shared
3691 && !h->def_regular)
3692 {
3693 h->root.u.def.section = s;
3694 h->root.u.def.value = h->plt.offset;
3695 }
3696
3697 /* Make room for this entry. After the 8192nd entry, room
3698 for two entries is allocated. */
3699 s->size += PLT_ENTRY_SIZE;
3700 if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
3701 > PLT_NUM_SINGLE_ENTRIES)
3702 s->size += PLT_ENTRY_SIZE;
3703
3704 /* We also need to make an entry in the .rela.plt section. */
3705 htab->relplt->size += sizeof (Elf32_External_Rela);
3706 }
3707 else
3708 {
3709 h->plt.offset = (bfd_vma) -1;
3710 h->needs_plt = 0;
3711 }
3712 }
3713 else
3714 {
3715 h->plt.offset = (bfd_vma) -1;
3716 h->needs_plt = 0;
3717 }
3718
3719 eh = (struct ppc_elf_link_hash_entry *) h;
3720 if (eh->elf.got.refcount > 0)
3721 {
3722 /* Make sure this symbol is output as a dynamic symbol. */
3723 if (eh->elf.dynindx == -1
3724 && !eh->elf.forced_local)
3725 {
3726 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
3727 return FALSE;
3728 }
3729
3730 if (eh->tls_mask == (TLS_TLS | TLS_LD)
3731 && !eh->elf.def_dynamic)
3732 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
3733 eh->elf.got.offset = (bfd_vma) -1;
3734 else
3735 {
3736 bfd_boolean dyn;
3737 eh->elf.got.offset = htab->got->size;
3738 if ((eh->tls_mask & TLS_TLS) != 0)
3739 {
3740 if ((eh->tls_mask & TLS_LD) != 0)
3741 htab->got->size += 8;
3742 if ((eh->tls_mask & TLS_GD) != 0)
3743 htab->got->size += 8;
3744 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
3745 htab->got->size += 4;
3746 if ((eh->tls_mask & TLS_DTPREL) != 0)
3747 htab->got->size += 4;
3748 }
3749 else
3750 htab->got->size += 4;
3751 dyn = htab->elf.dynamic_sections_created;
3752 if ((info->shared
3753 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
3754 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
3755 || eh->elf.root.type != bfd_link_hash_undefweak))
3756 {
3757 /* All the entries we allocated need relocs. */
3758 htab->relgot->size
3759 += ((htab->got->size - eh->elf.got.offset) / 4
3760 * sizeof (Elf32_External_Rela));
3761 /* Except LD only needs one. */
3762 if ((eh->tls_mask & TLS_LD) != 0)
3763 htab->relgot->size -= sizeof (Elf32_External_Rela);
3764 }
3765 }
3766 }
3767 else
3768 eh->elf.got.offset = (bfd_vma) -1;
3769
3770 if (eh->dyn_relocs == NULL)
3771 return TRUE;
3772
3773 /* In the shared -Bsymbolic case, discard space allocated for
3774 dynamic pc-relative relocs against symbols which turn out to be
3775 defined in regular objects. For the normal shared case, discard
3776 space for relocs that have become local due to symbol visibility
3777 changes. */
3778
3779 if (info->shared)
3780 {
3781 /* Relocs that use pc_count are those that appear on a call insn,
3782 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
3783 generated via assembly. We want calls to protected symbols to
3784 resolve directly to the function rather than going via the plt.
3785 If people want function pointer comparisons to work as expected
3786 then they should avoid writing weird assembly. */
3787 if (SYMBOL_CALLS_LOCAL (info, h))
3788 {
3789 struct ppc_elf_dyn_relocs **pp;
3790
3791 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3792 {
3793 p->count -= p->pc_count;
3794 p->pc_count = 0;
3795 if (p->count == 0)
3796 *pp = p->next;
3797 else
3798 pp = &p->next;
3799 }
3800 }
3801
3802 /* Also discard relocs on undefined weak syms with non-default
3803 visibility. */
3804 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3805 && h->root.type == bfd_link_hash_undefweak)
3806 eh->dyn_relocs = NULL;
3807
3808 /* Make sure undefined weak symbols are output as a dynamic symbol
3809 in PIEs. */
3810 if (info->pie
3811 && eh->dyn_relocs != NULL
3812 && h->dynindx == -1
3813 && h->root.type == bfd_link_hash_undefweak
3814 && !h->forced_local)
3815 {
3816 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3817 return FALSE;
3818 }
3819 }
3820 else if (ELIMINATE_COPY_RELOCS)
3821 {
3822 /* For the non-shared case, discard space for relocs against
3823 symbols which turn out to need copy relocs or are not
3824 dynamic. */
3825
3826 if (!h->non_got_ref
3827 && h->def_dynamic
3828 && !h->def_regular)
3829 {
3830 /* Make sure this symbol is output as a dynamic symbol.
3831 Undefined weak syms won't yet be marked as dynamic. */
3832 if (h->dynindx == -1
3833 && !h->forced_local)
3834 {
3835 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3836 return FALSE;
3837 }
3838
3839 /* If that succeeded, we know we'll be keeping all the
3840 relocs. */
3841 if (h->dynindx != -1)
3842 goto keep;
3843 }
3844
3845 eh->dyn_relocs = NULL;
3846
3847 keep: ;
3848 }
3849
3850 /* Finally, allocate space. */
3851 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3852 {
3853 asection *sreloc = elf_section_data (p->sec)->sreloc;
3854 sreloc->size += p->count * sizeof (Elf32_External_Rela);
3855 }
3856
3857 return TRUE;
3858 }
3859
3860 /* Find any dynamic relocs that apply to read-only sections. */
3861
3862 static bfd_boolean
3863 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
3864 {
3865 struct ppc_elf_dyn_relocs *p;
3866
3867 if (h->root.type == bfd_link_hash_indirect)
3868 return TRUE;
3869
3870 if (h->root.type == bfd_link_hash_warning)
3871 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3872
3873 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
3874 {
3875 asection *s = p->sec->output_section;
3876
3877 if (s != NULL
3878 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
3879 == (SEC_READONLY | SEC_ALLOC)))
3880 {
3881 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
3882
3883 /* Not an error, just cut short the traversal. */
3884 return FALSE;
3885 }
3886 }
3887 return TRUE;
3888 }
3889
3890 /* Set the sizes of the dynamic sections. */
3891
3892 static bfd_boolean
3893 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3894 struct bfd_link_info *info)
3895 {
3896 struct ppc_elf_link_hash_table *htab;
3897 asection *s;
3898 bfd_boolean relocs;
3899 bfd *ibfd;
3900
3901 #ifdef DEBUG
3902 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
3903 #endif
3904
3905 htab = ppc_elf_hash_table (info);
3906 BFD_ASSERT (htab->elf.dynobj != NULL);
3907
3908 if (elf_hash_table (info)->dynamic_sections_created)
3909 {
3910 /* Set the contents of the .interp section to the interpreter. */
3911 if (info->executable)
3912 {
3913 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
3914 BFD_ASSERT (s != NULL);
3915 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3916 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3917 }
3918 }
3919
3920 if (htab->tlsld_got.refcount > 0)
3921 {
3922 htab->tlsld_got.offset = htab->got->size;
3923 htab->got->size += 8;
3924 if (info->shared)
3925 htab->relgot->size += sizeof (Elf32_External_Rela);
3926 }
3927 else
3928 htab->tlsld_got.offset = (bfd_vma) -1;
3929
3930 /* Set up .got offsets for local syms, and space for local dynamic
3931 relocs. */
3932 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3933 {
3934 bfd_signed_vma *local_got;
3935 bfd_signed_vma *end_local_got;
3936 char *lgot_masks;
3937 bfd_size_type locsymcount;
3938 Elf_Internal_Shdr *symtab_hdr;
3939 asection *srel;
3940
3941 if (!is_ppc_elf_target (ibfd->xvec))
3942 continue;
3943
3944 for (s = ibfd->sections; s != NULL; s = s->next)
3945 {
3946 struct ppc_elf_dyn_relocs *p;
3947
3948 for (p = ((struct ppc_elf_dyn_relocs *)
3949 elf_section_data (s)->local_dynrel);
3950 p != NULL;
3951 p = p->next)
3952 {
3953 if (!bfd_is_abs_section (p->sec)
3954 && bfd_is_abs_section (p->sec->output_section))
3955 {
3956 /* Input section has been discarded, either because
3957 it is a copy of a linkonce section or due to
3958 linker script /DISCARD/, so we'll be discarding
3959 the relocs too. */
3960 }
3961 else if (p->count != 0)
3962 {
3963 elf_section_data (p->sec)->sreloc->size
3964 += p->count * sizeof (Elf32_External_Rela);
3965 if ((p->sec->output_section->flags
3966 & (SEC_READONLY | SEC_ALLOC))
3967 == (SEC_READONLY | SEC_ALLOC))
3968 info->flags |= DF_TEXTREL;
3969 }
3970 }
3971 }
3972
3973 local_got = elf_local_got_refcounts (ibfd);
3974 if (!local_got)
3975 continue;
3976
3977 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3978 locsymcount = symtab_hdr->sh_info;
3979 end_local_got = local_got + locsymcount;
3980 lgot_masks = (char *) end_local_got;
3981 s = htab->got;
3982 srel = htab->relgot;
3983 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
3984 if (*local_got > 0)
3985 {
3986 if (*lgot_masks == (TLS_TLS | TLS_LD))
3987 {
3988 /* If just an LD reloc, we'll just use
3989 htab->tlsld_got.offset. */
3990 if (htab->tlsld_got.offset == (bfd_vma) -1)
3991 {
3992 htab->tlsld_got.offset = s->size;
3993 s->size += 8;
3994 if (info->shared)
3995 srel->size += sizeof (Elf32_External_Rela);
3996 }
3997 *local_got = (bfd_vma) -1;
3998 }
3999 else
4000 {
4001 *local_got = s->size;
4002 if ((*lgot_masks & TLS_TLS) != 0)
4003 {
4004 if ((*lgot_masks & TLS_GD) != 0)
4005 s->size += 8;
4006 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4007 s->size += 4;
4008 if ((*lgot_masks & TLS_DTPREL) != 0)
4009 s->size += 4;
4010 }
4011 else
4012 s->size += 4;
4013 if (info->shared)
4014 srel->size += ((s->size - *local_got) / 4
4015 * sizeof (Elf32_External_Rela));
4016 }
4017 }
4018 else
4019 *local_got = (bfd_vma) -1;
4020 }
4021
4022 /* Allocate space for global sym dynamic relocs. */
4023 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4024
4025 /* We've now determined the sizes of the various dynamic sections.
4026 Allocate memory for them. */
4027 relocs = FALSE;
4028 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4029 {
4030 if ((s->flags & SEC_LINKER_CREATED) == 0)
4031 continue;
4032
4033 if (s == htab->plt
4034 || s == htab->got
4035 || s == htab->sbss)
4036 {
4037 /* Strip this section if we don't need it; see the
4038 comment below. */
4039 }
4040 else if (s == htab->sdata[0].section
4041 || s == htab->sdata[1].section)
4042 {
4043 /* Strip these too. */
4044 }
4045 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4046 {
4047 if (s->size == 0)
4048 {
4049 /* If we don't need this section, strip it from the
4050 output file. This is mostly to handle .rela.bss and
4051 .rela.plt. We must create both sections in
4052 create_dynamic_sections, because they must be created
4053 before the linker maps input sections to output
4054 sections. The linker does that before
4055 adjust_dynamic_symbol is called, and it is that
4056 function which decides whether anything needs to go
4057 into these sections. */
4058 }
4059 else
4060 {
4061 /* Remember whether there are any relocation sections. */
4062 relocs = TRUE;
4063
4064 /* We use the reloc_count field as a counter if we need
4065 to copy relocs into the output file. */
4066 s->reloc_count = 0;
4067 }
4068 }
4069 else
4070 {
4071 /* It's not one of our sections, so don't allocate space. */
4072 continue;
4073 }
4074
4075 if (s->size == 0)
4076 {
4077 _bfd_strip_section_from_output (info, s);
4078 continue;
4079 }
4080
4081 if (s == htab->sbss)
4082 continue;
4083
4084 /* Allocate memory for the section contents. */
4085 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4086 if (s->contents == NULL)
4087 return FALSE;
4088 }
4089
4090 if (htab->elf.dynamic_sections_created)
4091 {
4092 /* Add some entries to the .dynamic section. We fill in the
4093 values later, in ppc_elf_finish_dynamic_sections, but we
4094 must add the entries now so that we get the correct size for
4095 the .dynamic section. The DT_DEBUG entry is filled in by the
4096 dynamic linker and used by the debugger. */
4097 #define add_dynamic_entry(TAG, VAL) \
4098 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4099
4100 if (info->executable)
4101 {
4102 if (!add_dynamic_entry (DT_DEBUG, 0))
4103 return FALSE;
4104 }
4105
4106 if (htab->plt != NULL && htab->plt->size != 0)
4107 {
4108 if (!add_dynamic_entry (DT_PLTGOT, 0)
4109 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4110 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4111 || !add_dynamic_entry (DT_JMPREL, 0))
4112 return FALSE;
4113 }
4114
4115 if (relocs)
4116 {
4117 if (!add_dynamic_entry (DT_RELA, 0)
4118 || !add_dynamic_entry (DT_RELASZ, 0)
4119 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4120 return FALSE;
4121 }
4122
4123 /* If any dynamic relocs apply to a read-only section, then we
4124 need a DT_TEXTREL entry. */
4125 if ((info->flags & DF_TEXTREL) == 0)
4126 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4127 info);
4128
4129 if ((info->flags & DF_TEXTREL) != 0)
4130 {
4131 if (!add_dynamic_entry (DT_TEXTREL, 0))
4132 return FALSE;
4133 }
4134 }
4135 #undef add_dynamic_entry
4136
4137 return TRUE;
4138 }
4139 \f
4140 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4141
4142 static const int shared_stub_entry[] =
4143 {
4144 0x7c0802a6, /* mflr 0 */
4145 0x429f0005, /* bcl 20, 31, .Lxxx */
4146 0x7d6802a6, /* mflr 11 */
4147 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4148 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4149 0x7c0803a6, /* mtlr 0 */
4150 0x7d6903a6, /* mtctr 11 */
4151 0x4e800420, /* bctr */
4152 };
4153
4154 static const int stub_entry[] =
4155 {
4156 0x3d600000, /* lis 11,xxx@ha */
4157 0x396b0000, /* addi 11,11,xxx@l */
4158 0x7d6903a6, /* mtctr 11 */
4159 0x4e800420, /* bctr */
4160 };
4161
4162 static bfd_boolean
4163 ppc_elf_relax_section (bfd *abfd,
4164 asection *isec,
4165 struct bfd_link_info *link_info,
4166 bfd_boolean *again)
4167 {
4168 struct one_fixup
4169 {
4170 struct one_fixup *next;
4171 asection *tsec;
4172 bfd_vma toff;
4173 bfd_vma trampoff;
4174 };
4175
4176 Elf_Internal_Shdr *symtab_hdr;
4177 bfd_byte *contents = NULL;
4178 Elf_Internal_Sym *isymbuf = NULL;
4179 Elf_Internal_Rela *internal_relocs = NULL;
4180 Elf_Internal_Rela *irel, *irelend;
4181 struct one_fixup *fixups = NULL;
4182 bfd_boolean changed;
4183 struct ppc_elf_link_hash_table *ppc_info;
4184 bfd_size_type trampoff;
4185
4186 *again = FALSE;
4187
4188 /* Nothing to do if there are no relocations. */
4189 if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
4190 return TRUE;
4191
4192 trampoff = (isec->size + 3) & (bfd_vma) -4;
4193 /* Space for a branch around any trampolines. */
4194 trampoff += 4;
4195
4196 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4197
4198 /* Get a copy of the native relocations. */
4199 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4200 link_info->keep_memory);
4201 if (internal_relocs == NULL)
4202 goto error_return;
4203
4204 ppc_info = ppc_elf_hash_table (link_info);
4205 irelend = internal_relocs + isec->reloc_count;
4206
4207 for (irel = internal_relocs; irel < irelend; irel++)
4208 {
4209 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4210 bfd_vma symaddr, reladdr, toff, roff;
4211 asection *tsec;
4212 struct one_fixup *f;
4213 size_t insn_offset = 0;
4214 bfd_vma max_branch_offset, val;
4215 bfd_byte *hit_addr;
4216 unsigned long t0;
4217 unsigned char sym_type;
4218
4219 switch (r_type)
4220 {
4221 case R_PPC_REL24:
4222 case R_PPC_LOCAL24PC:
4223 case R_PPC_PLTREL24:
4224 max_branch_offset = 1 << 25;
4225 break;
4226
4227 case R_PPC_REL14:
4228 case R_PPC_REL14_BRTAKEN:
4229 case R_PPC_REL14_BRNTAKEN:
4230 max_branch_offset = 1 << 15;
4231 break;
4232
4233 default:
4234 continue;
4235 }
4236
4237 /* Get the value of the symbol referred to by the reloc. */
4238 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4239 {
4240 /* A local symbol. */
4241 Elf_Internal_Sym *isym;
4242
4243 /* Read this BFD's local symbols. */
4244 if (isymbuf == NULL)
4245 {
4246 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4247 if (isymbuf == NULL)
4248 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4249 symtab_hdr->sh_info, 0,
4250 NULL, NULL, NULL);
4251 if (isymbuf == 0)
4252 goto error_return;
4253 }
4254 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4255 if (isym->st_shndx == SHN_UNDEF)
4256 continue; /* We can't do anything with undefined symbols. */
4257 else if (isym->st_shndx == SHN_ABS)
4258 tsec = bfd_abs_section_ptr;
4259 else if (isym->st_shndx == SHN_COMMON)
4260 tsec = bfd_com_section_ptr;
4261 else
4262 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4263
4264 toff = isym->st_value;
4265 sym_type = ELF_ST_TYPE (isym->st_info);
4266 }
4267 else
4268 {
4269 /* Global symbol handling. */
4270 unsigned long indx;
4271 struct elf_link_hash_entry *h;
4272
4273 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4274 h = elf_sym_hashes (abfd)[indx];
4275
4276 while (h->root.type == bfd_link_hash_indirect
4277 || h->root.type == bfd_link_hash_warning)
4278 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4279
4280 if (r_type == R_PPC_PLTREL24
4281 && ppc_info->plt != NULL
4282 && h->plt.offset != (bfd_vma) -1)
4283 {
4284 tsec = ppc_info->plt;
4285 toff = h->plt.offset;
4286 }
4287 else if (h->root.type == bfd_link_hash_defined
4288 || h->root.type == bfd_link_hash_defweak)
4289 {
4290 tsec = h->root.u.def.section;
4291 toff = h->root.u.def.value;
4292 }
4293 else
4294 continue;
4295
4296 sym_type = h->type;
4297 }
4298
4299 /* If the branch and target are in the same section, you have
4300 no hope of adding stubs. We'll error out later should the
4301 branch overflow. */
4302 if (tsec == isec)
4303 continue;
4304
4305 /* There probably isn't any reason to handle symbols in
4306 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
4307 attribute for a code section, and we are only looking at
4308 branches. However, implement it correctly here as a
4309 reference for other target relax_section functions. */
4310 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
4311 {
4312 /* At this stage in linking, no SEC_MERGE symbol has been
4313 adjusted, so all references to such symbols need to be
4314 passed through _bfd_merged_section_offset. (Later, in
4315 relocate_section, all SEC_MERGE symbols *except* for
4316 section symbols have been adjusted.)
4317
4318 gas may reduce relocations against symbols in SEC_MERGE
4319 sections to a relocation against the section symbol when
4320 the original addend was zero. When the reloc is against
4321 a section symbol we should include the addend in the
4322 offset passed to _bfd_merged_section_offset, since the
4323 location of interest is the original symbol. On the
4324 other hand, an access to "sym+addend" where "sym" is not
4325 a section symbol should not include the addend; Such an
4326 access is presumed to be an offset from "sym"; The
4327 location of interest is just "sym". */
4328 if (sym_type == STT_SECTION)
4329 toff += irel->r_addend;
4330
4331 toff = _bfd_merged_section_offset (abfd, &tsec,
4332 elf_section_data (tsec)->sec_info,
4333 toff);
4334
4335 if (sym_type != STT_SECTION)
4336 toff += irel->r_addend;
4337 }
4338 else
4339 toff += irel->r_addend;
4340
4341 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
4342
4343 roff = irel->r_offset;
4344 reladdr = isec->output_section->vma + isec->output_offset + roff;
4345
4346 /* If the branch is in range, no need to do anything. */
4347 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
4348 continue;
4349
4350 /* Look for an existing fixup to this address. */
4351 for (f = fixups; f ; f = f->next)
4352 if (f->tsec == tsec && f->toff == toff)
4353 break;
4354
4355 if (f == NULL)
4356 {
4357 size_t size;
4358 unsigned long stub_rtype;
4359
4360 val = trampoff - roff;
4361 if (val >= max_branch_offset)
4362 /* Oh dear, we can't reach a trampoline. Don't try to add
4363 one. We'll report an error later. */
4364 continue;
4365
4366 if (link_info->shared)
4367 {
4368 size = 4 * ARRAY_SIZE (shared_stub_entry);
4369 insn_offset = 12;
4370 stub_rtype = R_PPC_RELAX32PC;
4371 }
4372 else
4373 {
4374 size = 4 * ARRAY_SIZE (stub_entry);
4375 insn_offset = 0;
4376 stub_rtype = R_PPC_RELAX32;
4377 }
4378
4379 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
4380 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
4381 abort ();
4382 if (tsec == ppc_info->plt)
4383 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
4384
4385 /* Hijack the old relocation. Since we need two
4386 relocations for this use a "composite" reloc. */
4387 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
4388 stub_rtype);
4389 irel->r_offset = trampoff + insn_offset;
4390
4391 /* Record the fixup so we don't do it again this section. */
4392 f = bfd_malloc (sizeof (*f));
4393 f->next = fixups;
4394 f->tsec = tsec;
4395 f->toff = toff;
4396 f->trampoff = trampoff;
4397 fixups = f;
4398
4399 trampoff += size;
4400 }
4401 else
4402 {
4403 val = f->trampoff - roff;
4404 if (val >= max_branch_offset)
4405 continue;
4406
4407 /* Nop out the reloc, since we're finalizing things here. */
4408 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
4409 }
4410
4411 /* Get the section contents. */
4412 if (contents == NULL)
4413 {
4414 /* Get cached copy if it exists. */
4415 if (elf_section_data (isec)->this_hdr.contents != NULL)
4416 contents = elf_section_data (isec)->this_hdr.contents;
4417 else
4418 {
4419 /* Go get them off disk. */
4420 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
4421 goto error_return;
4422 }
4423 }
4424
4425 /* Fix up the existing branch to hit the trampoline. */
4426 hit_addr = contents + roff;
4427 switch (r_type)
4428 {
4429 case R_PPC_REL24:
4430 case R_PPC_LOCAL24PC:
4431 case R_PPC_PLTREL24:
4432 t0 = bfd_get_32 (abfd, hit_addr);
4433 t0 &= ~0x3fffffc;
4434 t0 |= val & 0x3fffffc;
4435 bfd_put_32 (abfd, t0, hit_addr);
4436 break;
4437
4438 case R_PPC_REL14:
4439 case R_PPC_REL14_BRTAKEN:
4440 case R_PPC_REL14_BRNTAKEN:
4441 t0 = bfd_get_32 (abfd, hit_addr);
4442 t0 &= ~0xfffc;
4443 t0 |= val & 0xfffc;
4444 bfd_put_32 (abfd, t0, hit_addr);
4445 break;
4446 }
4447 }
4448
4449 /* Write out the trampolines. */
4450 changed = fixups != NULL;
4451 if (fixups != NULL)
4452 {
4453 const int *stub;
4454 bfd_byte *dest;
4455 bfd_vma val;
4456 int i, size;
4457
4458 do
4459 {
4460 struct one_fixup *f = fixups;
4461 fixups = fixups->next;
4462 free (f);
4463 }
4464 while (fixups);
4465
4466 contents = bfd_realloc (contents, trampoff);
4467 if (contents == NULL)
4468 goto error_return;
4469
4470 isec->size = (isec->size + 3) & (bfd_vma) -4;
4471 /* Branch around the trampolines. */
4472 val = trampoff - isec->size + 0x48000000;
4473 dest = contents + isec->size;
4474 isec->size = trampoff;
4475 bfd_put_32 (abfd, val, dest);
4476 dest += 4;
4477
4478 if (link_info->shared)
4479 {
4480 stub = shared_stub_entry;
4481 size = ARRAY_SIZE (shared_stub_entry);
4482 }
4483 else
4484 {
4485 stub = stub_entry;
4486 size = ARRAY_SIZE (stub_entry);
4487 }
4488
4489 i = 0;
4490 while (dest < contents + trampoff)
4491 {
4492 bfd_put_32 (abfd, stub[i], dest);
4493 i++;
4494 if (i == size)
4495 i = 0;
4496 dest += 4;
4497 }
4498 BFD_ASSERT (i == 0);
4499 }
4500
4501 if (isymbuf != NULL
4502 && symtab_hdr->contents != (unsigned char *) isymbuf)
4503 {
4504 if (! link_info->keep_memory)
4505 free (isymbuf);
4506 else
4507 {
4508 /* Cache the symbols for elf_link_input_bfd. */
4509 symtab_hdr->contents = (unsigned char *) isymbuf;
4510 }
4511 }
4512
4513 if (contents != NULL
4514 && elf_section_data (isec)->this_hdr.contents != contents)
4515 {
4516 if (!changed && !link_info->keep_memory)
4517 free (contents);
4518 else
4519 {
4520 /* Cache the section contents for elf_link_input_bfd. */
4521 elf_section_data (isec)->this_hdr.contents = contents;
4522 }
4523 }
4524
4525 if (elf_section_data (isec)->relocs != internal_relocs)
4526 {
4527 if (!changed)
4528 free (internal_relocs);
4529 else
4530 elf_section_data (isec)->relocs = internal_relocs;
4531 }
4532
4533 *again = changed;
4534 return TRUE;
4535
4536 error_return:
4537 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
4538 free (isymbuf);
4539 if (contents != NULL
4540 && elf_section_data (isec)->this_hdr.contents != contents)
4541 free (contents);
4542 if (internal_relocs != NULL
4543 && elf_section_data (isec)->relocs != internal_relocs)
4544 free (internal_relocs);
4545 return FALSE;
4546 }
4547 \f
4548 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
4549 set here rather than via PROVIDE in the default linker script,
4550 because using PROVIDE inside an output section statement results in
4551 unnecessary output sections. Using PROVIDE outside an output section
4552 statement runs the risk of section alignment affecting where the
4553 section starts. */
4554
4555 bfd_boolean
4556 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
4557 {
4558 struct ppc_elf_link_hash_table *htab;
4559 unsigned i;
4560 asection *s;
4561 bfd_vma val;
4562
4563 htab = ppc_elf_hash_table (info);
4564
4565 for (i = 0; i < 2; i++)
4566 {
4567 elf_linker_section_t *lsect = &htab->sdata[i];
4568
4569 s = lsect->section;
4570 if (s != NULL)
4571 s = s->output_section;
4572 if (s == NULL)
4573 s = bfd_get_section_by_name (obfd, lsect->name);
4574 if (s == NULL)
4575 s = bfd_get_section_by_name (obfd, lsect->bss_name);
4576
4577 val = 0;
4578 if (s != NULL)
4579 val = s->vma + 32768;
4580 lsect->sym_val = val;
4581
4582 _bfd_elf_provide_symbol (info, lsect->sym_name, val);
4583 }
4584
4585 s = bfd_get_section_by_name (obfd, ".sbss");
4586 val = 0;
4587 if (s != NULL)
4588 val = s->vma;
4589 _bfd_elf_provide_symbol (info, "__sbss_start", val);
4590 _bfd_elf_provide_symbol (info, "___sbss_start", val);
4591 if (s != NULL)
4592 val += s->size;
4593 _bfd_elf_provide_symbol (info, "__sbss_end", val);
4594 _bfd_elf_provide_symbol (info, "___sbss_end", val);
4595 return TRUE;
4596 }
4597 \f
4598 /* Fill in the address for a pointer generated in a linker section. */
4599
4600 static bfd_vma
4601 elf_finish_pointer_linker_section (bfd *input_bfd,
4602 elf_linker_section_t *lsect,
4603 struct elf_link_hash_entry *h,
4604 bfd_vma relocation,
4605 const Elf_Internal_Rela *rel)
4606 {
4607 elf_linker_section_pointers_t *linker_section_ptr;
4608
4609 BFD_ASSERT (lsect != NULL);
4610
4611 if (h != NULL)
4612 {
4613 /* Handle global symbol. */
4614 struct ppc_elf_link_hash_entry *eh;
4615
4616 eh = (struct ppc_elf_link_hash_entry *) h;
4617 BFD_ASSERT (eh->elf.def_regular);
4618 linker_section_ptr = eh->linker_section_pointer;
4619 }
4620 else
4621 {
4622 /* Handle local symbol. */
4623 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
4624
4625 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
4626 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
4627 }
4628
4629 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
4630 rel->r_addend,
4631 lsect);
4632 BFD_ASSERT (linker_section_ptr != NULL);
4633
4634 /* Offset will always be a multiple of four, so use the bottom bit
4635 as a "written" flag. */
4636 if ((linker_section_ptr->offset & 1) == 0)
4637 {
4638 bfd_put_32 (lsect->section->owner,
4639 relocation + linker_section_ptr->addend,
4640 lsect->section->contents + linker_section_ptr->offset);
4641 linker_section_ptr->offset += 1;
4642 }
4643
4644 relocation = (lsect->section->output_offset
4645 + linker_section_ptr->offset - 1
4646 - 0x8000);
4647
4648 #ifdef DEBUG
4649 fprintf (stderr,
4650 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
4651 lsect->name, (long) relocation, (long) relocation);
4652 #endif
4653
4654 /* Subtract out the addend, because it will get added back in by the normal
4655 processing. */
4656 return relocation - linker_section_ptr->addend;
4657 }
4658
4659 /* The RELOCATE_SECTION function is called by the ELF backend linker
4660 to handle the relocations for a section.
4661
4662 The relocs are always passed as Rela structures; if the section
4663 actually uses Rel structures, the r_addend field will always be
4664 zero.
4665
4666 This function is responsible for adjust the section contents as
4667 necessary, and (if using Rela relocs and generating a
4668 relocatable output file) adjusting the reloc addend as
4669 necessary.
4670
4671 This function does not have to worry about setting the reloc
4672 address or the reloc symbol index.
4673
4674 LOCAL_SYMS is a pointer to the swapped in local symbols.
4675
4676 LOCAL_SECTIONS is an array giving the section in the input file
4677 corresponding to the st_shndx field of each local symbol.
4678
4679 The global hash table entry for the global symbols can be found
4680 via elf_sym_hashes (input_bfd).
4681
4682 When generating relocatable output, this function must handle
4683 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
4684 going to be the section symbol corresponding to the output
4685 section, which means that the addend must be adjusted
4686 accordingly. */
4687
4688 static bfd_boolean
4689 ppc_elf_relocate_section (bfd *output_bfd,
4690 struct bfd_link_info *info,
4691 bfd *input_bfd,
4692 asection *input_section,
4693 bfd_byte *contents,
4694 Elf_Internal_Rela *relocs,
4695 Elf_Internal_Sym *local_syms,
4696 asection **local_sections)
4697 {
4698 Elf_Internal_Shdr *symtab_hdr;
4699 struct elf_link_hash_entry **sym_hashes;
4700 struct ppc_elf_link_hash_table *htab;
4701 Elf_Internal_Rela *rel;
4702 Elf_Internal_Rela *relend;
4703 Elf_Internal_Rela outrel;
4704 bfd_byte *loc;
4705 asection *sreloc = NULL;
4706 bfd_vma *local_got_offsets;
4707 bfd_boolean ret = TRUE;
4708
4709 #ifdef DEBUG
4710 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
4711 "%ld relocations%s",
4712 input_bfd, input_section,
4713 (long) input_section->reloc_count,
4714 (info->relocatable) ? " (relocatable)" : "");
4715 #endif
4716
4717 if (info->relocatable)
4718 return TRUE;
4719
4720 /* Initialize howto table if not already done. */
4721 if (!ppc_elf_howto_table[R_PPC_ADDR32])
4722 ppc_elf_howto_init ();
4723
4724 htab = ppc_elf_hash_table (info);
4725 local_got_offsets = elf_local_got_offsets (input_bfd);
4726 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4727 sym_hashes = elf_sym_hashes (input_bfd);
4728 rel = relocs;
4729 relend = relocs + input_section->reloc_count;
4730 for (; rel < relend; rel++)
4731 {
4732 enum elf_ppc_reloc_type r_type;
4733 bfd_vma addend;
4734 bfd_reloc_status_type r;
4735 Elf_Internal_Sym *sym;
4736 asection *sec;
4737 struct elf_link_hash_entry *h;
4738 const char *sym_name;
4739 reloc_howto_type *howto;
4740 unsigned long r_symndx;
4741 bfd_vma relocation;
4742 bfd_vma branch_bit, insn, from;
4743 bfd_boolean unresolved_reloc;
4744 bfd_boolean warned;
4745 unsigned int tls_type, tls_mask, tls_gd;
4746
4747 r_type = ELF32_R_TYPE (rel->r_info);
4748 sym = NULL;
4749 sec = NULL;
4750 h = NULL;
4751 unresolved_reloc = FALSE;
4752 warned = FALSE;
4753 r_symndx = ELF32_R_SYM (rel->r_info);
4754
4755 if (r_symndx < symtab_hdr->sh_info)
4756 {
4757 sym = local_syms + r_symndx;
4758 sec = local_sections[r_symndx];
4759 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
4760
4761 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4762 }
4763 else
4764 {
4765 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4766 r_symndx, symtab_hdr, sym_hashes,
4767 h, sec, relocation,
4768 unresolved_reloc, warned);
4769
4770 sym_name = h->root.root.string;
4771 }
4772
4773 /* TLS optimizations. Replace instruction sequences and relocs
4774 based on information we collected in tls_optimize. We edit
4775 RELOCS so that --emit-relocs will output something sensible
4776 for the final instruction stream. */
4777 tls_mask = 0;
4778 tls_gd = 0;
4779 if (IS_PPC_TLS_RELOC (r_type))
4780 {
4781 if (h != NULL)
4782 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
4783 else if (local_got_offsets != NULL)
4784 {
4785 char *lgot_masks;
4786 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
4787 tls_mask = lgot_masks[r_symndx];
4788 }
4789 }
4790
4791 /* Ensure reloc mapping code below stays sane. */
4792 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
4793 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
4794 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
4795 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
4796 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
4797 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
4798 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
4799 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
4800 abort ();
4801 switch (r_type)
4802 {
4803 default:
4804 break;
4805
4806 case R_PPC_GOT_TPREL16:
4807 case R_PPC_GOT_TPREL16_LO:
4808 if (tls_mask != 0
4809 && (tls_mask & TLS_TPREL) == 0)
4810 {
4811 bfd_vma insn;
4812 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
4813 insn &= 31 << 21;
4814 insn |= 0x3c020000; /* addis 0,2,0 */
4815 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
4816 r_type = R_PPC_TPREL16_HA;
4817 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4818 }
4819 break;
4820
4821 case R_PPC_TLS:
4822 if (tls_mask != 0
4823 && (tls_mask & TLS_TPREL) == 0)
4824 {
4825 bfd_vma insn, rtra;
4826 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4827 if ((insn & ((31 << 26) | (31 << 11)))
4828 == ((31 << 26) | (2 << 11)))
4829 rtra = insn & ((1 << 26) - (1 << 16));
4830 else if ((insn & ((31 << 26) | (31 << 16)))
4831 == ((31 << 26) | (2 << 16)))
4832 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
4833 else
4834 abort ();
4835 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
4836 /* add -> addi. */
4837 insn = 14 << 26;
4838 else if ((insn & (31 << 1)) == 23 << 1
4839 && ((insn & (31 << 6)) < 14 << 6
4840 || ((insn & (31 << 6)) >= 16 << 6
4841 && (insn & (31 << 6)) < 24 << 6)))
4842 /* load and store indexed -> dform. */
4843 insn = (32 | ((insn >> 6) & 31)) << 26;
4844 else if ((insn & (31 << 1)) == 21 << 1
4845 && (insn & (0x1a << 6)) == 0)
4846 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
4847 insn = (((58 | ((insn >> 6) & 4)) << 26)
4848 | ((insn >> 6) & 1));
4849 else if ((insn & (31 << 1)) == 21 << 1
4850 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
4851 /* lwax -> lwa. */
4852 insn = (58 << 26) | 2;
4853 else
4854 abort ();
4855 insn |= rtra;
4856 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
4857 r_type = R_PPC_TPREL16_LO;
4858 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4859 /* Was PPC_TLS which sits on insn boundary, now
4860 PPC_TPREL16_LO which is at insn+2. */
4861 rel->r_offset += 2;
4862 }
4863 break;
4864
4865 case R_PPC_GOT_TLSGD16_HI:
4866 case R_PPC_GOT_TLSGD16_HA:
4867 tls_gd = TLS_TPRELGD;
4868 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4869 goto tls_gdld_hi;
4870 break;
4871
4872 case R_PPC_GOT_TLSLD16_HI:
4873 case R_PPC_GOT_TLSLD16_HA:
4874 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4875 {
4876 tls_gdld_hi:
4877 if ((tls_mask & tls_gd) != 0)
4878 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4879 + R_PPC_GOT_TPREL16);
4880 else
4881 {
4882 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
4883 rel->r_offset -= 2;
4884 r_type = R_PPC_NONE;
4885 }
4886 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4887 }
4888 break;
4889
4890 case R_PPC_GOT_TLSGD16:
4891 case R_PPC_GOT_TLSGD16_LO:
4892 tls_gd = TLS_TPRELGD;
4893 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
4894 goto tls_get_addr_check;
4895 break;
4896
4897 case R_PPC_GOT_TLSLD16:
4898 case R_PPC_GOT_TLSLD16_LO:
4899 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
4900 {
4901 tls_get_addr_check:
4902 if (rel + 1 < relend)
4903 {
4904 enum elf_ppc_reloc_type r_type2;
4905 unsigned long r_symndx2;
4906 struct elf_link_hash_entry *h2;
4907 bfd_vma insn1, insn2;
4908 bfd_vma offset;
4909
4910 /* The next instruction should be a call to
4911 __tls_get_addr. Peek at the reloc to be sure. */
4912 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4913 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4914 if (r_symndx2 < symtab_hdr->sh_info
4915 || (r_type2 != R_PPC_REL14
4916 && r_type2 != R_PPC_REL14_BRTAKEN
4917 && r_type2 != R_PPC_REL14_BRNTAKEN
4918 && r_type2 != R_PPC_REL24
4919 && r_type2 != R_PPC_PLTREL24))
4920 break;
4921
4922 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4923 while (h2->root.type == bfd_link_hash_indirect
4924 || h2->root.type == bfd_link_hash_warning)
4925 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
4926 if (h2 == NULL || h2 != htab->tls_get_addr)
4927 break;
4928
4929 /* OK, it checks out. Replace the call. */
4930 offset = rel[1].r_offset;
4931 insn1 = bfd_get_32 (output_bfd,
4932 contents + rel->r_offset - 2);
4933 if ((tls_mask & tls_gd) != 0)
4934 {
4935 /* IE */
4936 insn1 &= (1 << 26) - 1;
4937 insn1 |= 32 << 26; /* lwz */
4938 insn2 = 0x7c631214; /* add 3,3,2 */
4939 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
4940 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
4941 + R_PPC_GOT_TPREL16);
4942 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4943 }
4944 else
4945 {
4946 /* LE */
4947 insn1 = 0x3c620000; /* addis 3,2,0 */
4948 insn2 = 0x38630000; /* addi 3,3,0 */
4949 if (tls_gd == 0)
4950 {
4951 /* Was an LD reloc. */
4952 r_symndx = 0;
4953 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4954 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
4955 }
4956 r_type = R_PPC_TPREL16_HA;
4957 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
4958 rel[1].r_info = ELF32_R_INFO (r_symndx,
4959 R_PPC_TPREL16_LO);
4960 rel[1].r_offset += 2;
4961 }
4962 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
4963 bfd_put_32 (output_bfd, insn2, contents + offset);
4964 if (tls_gd == 0)
4965 {
4966 /* We changed the symbol on an LD reloc. Start over
4967 in order to get h, sym, sec etc. right. */
4968 rel--;
4969 continue;
4970 }
4971 }
4972 }
4973 break;
4974 }
4975
4976 /* Handle other relocations that tweak non-addend part of insn. */
4977 branch_bit = 0;
4978 switch (r_type)
4979 {
4980 default:
4981 break;
4982
4983 /* Branch taken prediction relocations. */
4984 case R_PPC_ADDR14_BRTAKEN:
4985 case R_PPC_REL14_BRTAKEN:
4986 branch_bit = BRANCH_PREDICT_BIT;
4987 /* Fall thru */
4988
4989 /* Branch not taken prediction relocations. */
4990 case R_PPC_ADDR14_BRNTAKEN:
4991 case R_PPC_REL14_BRNTAKEN:
4992 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
4993 insn &= ~BRANCH_PREDICT_BIT;
4994 insn |= branch_bit;
4995
4996 from = (rel->r_offset
4997 + input_section->output_offset
4998 + input_section->output_section->vma);
4999
5000 /* Invert 'y' bit if not the default. */
5001 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5002 insn ^= BRANCH_PREDICT_BIT;
5003
5004 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5005 break;
5006 }
5007
5008 addend = rel->r_addend;
5009 tls_type = 0;
5010 howto = NULL;
5011 if (r_type < R_PPC_max)
5012 howto = ppc_elf_howto_table[r_type];
5013 switch (r_type)
5014 {
5015 default:
5016 (*_bfd_error_handler)
5017 (_("%B: unknown relocation type %d for symbol %s"),
5018 input_bfd, (int) r_type, sym_name);
5019
5020 bfd_set_error (bfd_error_bad_value);
5021 ret = FALSE;
5022 continue;
5023
5024 case R_PPC_NONE:
5025 case R_PPC_TLS:
5026 case R_PPC_EMB_MRKREF:
5027 case R_PPC_GNU_VTINHERIT:
5028 case R_PPC_GNU_VTENTRY:
5029 continue;
5030
5031 /* GOT16 relocations. Like an ADDR16 using the symbol's
5032 address in the GOT as relocation value instead of the
5033 symbol's value itself. Also, create a GOT entry for the
5034 symbol and put the symbol value there. */
5035 case R_PPC_GOT_TLSGD16:
5036 case R_PPC_GOT_TLSGD16_LO:
5037 case R_PPC_GOT_TLSGD16_HI:
5038 case R_PPC_GOT_TLSGD16_HA:
5039 tls_type = TLS_TLS | TLS_GD;
5040 goto dogot;
5041
5042 case R_PPC_GOT_TLSLD16:
5043 case R_PPC_GOT_TLSLD16_LO:
5044 case R_PPC_GOT_TLSLD16_HI:
5045 case R_PPC_GOT_TLSLD16_HA:
5046 tls_type = TLS_TLS | TLS_LD;
5047 goto dogot;
5048
5049 case R_PPC_GOT_TPREL16:
5050 case R_PPC_GOT_TPREL16_LO:
5051 case R_PPC_GOT_TPREL16_HI:
5052 case R_PPC_GOT_TPREL16_HA:
5053 tls_type = TLS_TLS | TLS_TPREL;
5054 goto dogot;
5055
5056 case R_PPC_GOT_DTPREL16:
5057 case R_PPC_GOT_DTPREL16_LO:
5058 case R_PPC_GOT_DTPREL16_HI:
5059 case R_PPC_GOT_DTPREL16_HA:
5060 tls_type = TLS_TLS | TLS_DTPREL;
5061 goto dogot;
5062
5063 case R_PPC_GOT16:
5064 case R_PPC_GOT16_LO:
5065 case R_PPC_GOT16_HI:
5066 case R_PPC_GOT16_HA:
5067 dogot:
5068 {
5069 /* Relocation is to the entry for this symbol in the global
5070 offset table. */
5071 bfd_vma off;
5072 bfd_vma *offp;
5073 unsigned long indx;
5074
5075 if (htab->got == NULL)
5076 abort ();
5077
5078 indx = 0;
5079 if (tls_type == (TLS_TLS | TLS_LD)
5080 && (h == NULL
5081 || !h->def_dynamic))
5082 offp = &htab->tlsld_got.offset;
5083 else if (h != NULL)
5084 {
5085 bfd_boolean dyn;
5086 dyn = htab->elf.dynamic_sections_created;
5087 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5088 || (info->shared
5089 && SYMBOL_REFERENCES_LOCAL (info, h)))
5090 /* This is actually a static link, or it is a
5091 -Bsymbolic link and the symbol is defined
5092 locally, or the symbol was forced to be local
5093 because of a version file. */
5094 ;
5095 else
5096 {
5097 indx = h->dynindx;
5098 unresolved_reloc = FALSE;
5099 }
5100 offp = &h->got.offset;
5101 }
5102 else
5103 {
5104 if (local_got_offsets == NULL)
5105 abort ();
5106 offp = &local_got_offsets[r_symndx];
5107 }
5108
5109 /* The offset must always be a multiple of 4. We use the
5110 least significant bit to record whether we have already
5111 processed this entry. */
5112 off = *offp;
5113 if ((off & 1) != 0)
5114 off &= ~1;
5115 else
5116 {
5117 unsigned int tls_m = (tls_mask
5118 & (TLS_LD | TLS_GD | TLS_DTPREL
5119 | TLS_TPREL | TLS_TPRELGD));
5120
5121 if (offp == &htab->tlsld_got.offset)
5122 tls_m = TLS_LD;
5123 else if (h == NULL
5124 || !h->def_dynamic)
5125 tls_m &= ~TLS_LD;
5126
5127 /* We might have multiple got entries for this sym.
5128 Initialize them all. */
5129 do
5130 {
5131 int tls_ty = 0;
5132
5133 if ((tls_m & TLS_LD) != 0)
5134 {
5135 tls_ty = TLS_TLS | TLS_LD;
5136 tls_m &= ~TLS_LD;
5137 }
5138 else if ((tls_m & TLS_GD) != 0)
5139 {
5140 tls_ty = TLS_TLS | TLS_GD;
5141 tls_m &= ~TLS_GD;
5142 }
5143 else if ((tls_m & TLS_DTPREL) != 0)
5144 {
5145 tls_ty = TLS_TLS | TLS_DTPREL;
5146 tls_m &= ~TLS_DTPREL;
5147 }
5148 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5149 {
5150 tls_ty = TLS_TLS | TLS_TPREL;
5151 tls_m = 0;
5152 }
5153
5154 /* Generate relocs for the dynamic linker. */
5155 if ((info->shared || indx != 0)
5156 && (h == NULL
5157 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5158 || h->root.type != bfd_link_hash_undefweak))
5159 {
5160 outrel.r_offset = (htab->got->output_section->vma
5161 + htab->got->output_offset
5162 + off);
5163 outrel.r_addend = 0;
5164 if (tls_ty & (TLS_LD | TLS_GD))
5165 {
5166 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5167 if (tls_ty == (TLS_TLS | TLS_GD))
5168 {
5169 loc = htab->relgot->contents;
5170 loc += (htab->relgot->reloc_count++
5171 * sizeof (Elf32_External_Rela));
5172 bfd_elf32_swap_reloca_out (output_bfd,
5173 &outrel, loc);
5174 outrel.r_offset += 4;
5175 outrel.r_info
5176 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5177 }
5178 }
5179 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5180 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5181 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5182 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5183 else if (indx == 0)
5184 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5185 else
5186 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5187 if (indx == 0)
5188 {
5189 outrel.r_addend += relocation;
5190 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5191 outrel.r_addend -= htab->elf.tls_sec->vma;
5192 }
5193 loc = htab->relgot->contents;
5194 loc += (htab->relgot->reloc_count++
5195 * sizeof (Elf32_External_Rela));
5196 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5197 }
5198
5199 /* Init the .got section contents if we're not
5200 emitting a reloc. */
5201 else
5202 {
5203 bfd_vma value = relocation;
5204
5205 if (tls_ty == (TLS_TLS | TLS_LD))
5206 value = 1;
5207 else if (tls_ty != 0)
5208 {
5209 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5210 if (tls_ty == (TLS_TLS | TLS_TPREL))
5211 value += DTP_OFFSET - TP_OFFSET;
5212
5213 if (tls_ty == (TLS_TLS | TLS_GD))
5214 {
5215 bfd_put_32 (output_bfd, value,
5216 htab->got->contents + off + 4);
5217 value = 1;
5218 }
5219 }
5220 bfd_put_32 (output_bfd, value,
5221 htab->got->contents + off);
5222 }
5223
5224 off += 4;
5225 if (tls_ty & (TLS_LD | TLS_GD))
5226 off += 4;
5227 }
5228 while (tls_m != 0);
5229
5230 off = *offp;
5231 *offp = off | 1;
5232 }
5233
5234 if (off >= (bfd_vma) -2)
5235 abort ();
5236
5237 if ((tls_type & TLS_TLS) != 0)
5238 {
5239 if (tls_type != (TLS_TLS | TLS_LD))
5240 {
5241 if ((tls_mask & TLS_LD) != 0
5242 && !(h == NULL
5243 || !h->def_dynamic))
5244 off += 8;
5245 if (tls_type != (TLS_TLS | TLS_GD))
5246 {
5247 if ((tls_mask & TLS_GD) != 0)
5248 off += 8;
5249 if (tls_type != (TLS_TLS | TLS_DTPREL))
5250 {
5251 if ((tls_mask & TLS_DTPREL) != 0)
5252 off += 4;
5253 }
5254 }
5255 }
5256 }
5257
5258 relocation = htab->got->output_offset + off - 4;
5259
5260 /* Addends on got relocations don't make much sense.
5261 x+off@got is actually x@got+off, and since the got is
5262 generated by a hash table traversal, the value in the
5263 got at entry m+n bears little relation to the entry m. */
5264 if (addend != 0)
5265 (*_bfd_error_handler)
5266 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5267 input_bfd,
5268 input_section,
5269 (long) rel->r_offset,
5270 howto->name,
5271 sym_name);
5272 }
5273 break;
5274
5275 /* Relocations that need no special processing. */
5276 case R_PPC_LOCAL24PC:
5277 /* It makes no sense to point a local relocation
5278 at a symbol not in this object. */
5279 if (unresolved_reloc)
5280 {
5281 if (! (*info->callbacks->undefined_symbol) (info,
5282 h->root.root.string,
5283 input_bfd,
5284 input_section,
5285 rel->r_offset,
5286 TRUE))
5287 return FALSE;
5288 continue;
5289 }
5290 break;
5291
5292 case R_PPC_DTPREL16:
5293 case R_PPC_DTPREL16_LO:
5294 case R_PPC_DTPREL16_HI:
5295 case R_PPC_DTPREL16_HA:
5296 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5297 break;
5298
5299 /* Relocations that may need to be propagated if this is a shared
5300 object. */
5301 case R_PPC_TPREL16:
5302 case R_PPC_TPREL16_LO:
5303 case R_PPC_TPREL16_HI:
5304 case R_PPC_TPREL16_HA:
5305 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5306 /* The TPREL16 relocs shouldn't really be used in shared
5307 libs as they will result in DT_TEXTREL being set, but
5308 support them anyway. */
5309 goto dodyn;
5310
5311 case R_PPC_TPREL32:
5312 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
5313 goto dodyn;
5314
5315 case R_PPC_DTPREL32:
5316 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
5317 goto dodyn;
5318
5319 case R_PPC_DTPMOD32:
5320 relocation = 1;
5321 addend = 0;
5322 goto dodyn;
5323
5324 case R_PPC_REL24:
5325 case R_PPC_REL32:
5326 case R_PPC_REL14:
5327 case R_PPC_REL14_BRTAKEN:
5328 case R_PPC_REL14_BRNTAKEN:
5329 /* If these relocations are not to a named symbol, they can be
5330 handled right here, no need to bother the dynamic linker. */
5331 if (SYMBOL_REFERENCES_LOCAL (info, h)
5332 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
5333 break;
5334 /* fall through */
5335
5336 /* Relocations that always need to be propagated if this is a shared
5337 object. */
5338 case R_PPC_ADDR32:
5339 case R_PPC_ADDR24:
5340 case R_PPC_ADDR16:
5341 case R_PPC_ADDR16_LO:
5342 case R_PPC_ADDR16_HI:
5343 case R_PPC_ADDR16_HA:
5344 case R_PPC_ADDR14:
5345 case R_PPC_ADDR14_BRTAKEN:
5346 case R_PPC_ADDR14_BRNTAKEN:
5347 case R_PPC_UADDR32:
5348 case R_PPC_UADDR16:
5349 /* r_symndx will be zero only for relocs against symbols
5350 from removed linkonce sections, or sections discarded by
5351 a linker script. */
5352 dodyn:
5353 if (r_symndx == 0)
5354 break;
5355 /* Fall thru. */
5356
5357 if ((info->shared
5358 && (h == NULL
5359 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5360 || h->root.type != bfd_link_hash_undefweak)
5361 && (MUST_BE_DYN_RELOC (r_type)
5362 || !SYMBOL_CALLS_LOCAL (info, h)))
5363 || (ELIMINATE_COPY_RELOCS
5364 && !info->shared
5365 && (input_section->flags & SEC_ALLOC) != 0
5366 && h != NULL
5367 && h->dynindx != -1
5368 && !h->non_got_ref
5369 && h->def_dynamic
5370 && !h->def_regular))
5371 {
5372 int skip;
5373
5374 #ifdef DEBUG
5375 fprintf (stderr, "ppc_elf_relocate_section needs to "
5376 "create relocation for %s\n",
5377 (h && h->root.root.string
5378 ? h->root.root.string : "<unknown>"));
5379 #endif
5380
5381 /* When generating a shared object, these relocations
5382 are copied into the output file to be resolved at run
5383 time. */
5384 if (sreloc == NULL)
5385 {
5386 const char *name;
5387
5388 name = (bfd_elf_string_from_elf_section
5389 (input_bfd,
5390 elf_elfheader (input_bfd)->e_shstrndx,
5391 elf_section_data (input_section)->rel_hdr.sh_name));
5392 if (name == NULL)
5393 return FALSE;
5394
5395 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
5396 && strcmp (bfd_get_section_name (input_bfd,
5397 input_section),
5398 name + 5) == 0);
5399
5400 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
5401 BFD_ASSERT (sreloc != NULL);
5402 }
5403
5404 skip = 0;
5405
5406 outrel.r_offset =
5407 _bfd_elf_section_offset (output_bfd, info, input_section,
5408 rel->r_offset);
5409 if (outrel.r_offset == (bfd_vma) -1
5410 || outrel.r_offset == (bfd_vma) -2)
5411 skip = (int) outrel.r_offset;
5412 outrel.r_offset += (input_section->output_section->vma
5413 + input_section->output_offset);
5414
5415 if (skip)
5416 memset (&outrel, 0, sizeof outrel);
5417 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
5418 {
5419 unresolved_reloc = FALSE;
5420 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5421 outrel.r_addend = rel->r_addend;
5422 }
5423 else
5424 {
5425 outrel.r_addend = relocation + rel->r_addend;
5426
5427 if (r_type == R_PPC_ADDR32)
5428 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
5429 else
5430 {
5431 long indx;
5432
5433 if (bfd_is_abs_section (sec))
5434 indx = 0;
5435 else if (sec == NULL || sec->owner == NULL)
5436 {
5437 bfd_set_error (bfd_error_bad_value);
5438 return FALSE;
5439 }
5440 else
5441 {
5442 asection *osec;
5443
5444 /* We are turning this relocation into one
5445 against a section symbol. It would be
5446 proper to subtract the symbol's value,
5447 osec->vma, from the emitted reloc addend,
5448 but ld.so expects buggy relocs. */
5449 osec = sec->output_section;
5450 indx = elf_section_data (osec)->dynindx;
5451 BFD_ASSERT (indx > 0);
5452 #ifdef DEBUG
5453 if (indx <= 0)
5454 printf ("indx=%d section=%s flags=%08x name=%s\n",
5455 indx, osec->name, osec->flags,
5456 h->root.root.string);
5457 #endif
5458 }
5459
5460 outrel.r_info = ELF32_R_INFO (indx, r_type);
5461 }
5462 }
5463
5464 loc = sreloc->contents;
5465 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
5466 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5467
5468 if (skip == -1)
5469 continue;
5470
5471 /* This reloc will be computed at runtime. We clear the memory
5472 so that it contains predictable value. */
5473 if (! skip
5474 && ((input_section->flags & SEC_ALLOC) != 0
5475 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
5476 {
5477 relocation = howto->pc_relative ? outrel.r_offset : 0;
5478 addend = 0;
5479 break;
5480 }
5481 }
5482 break;
5483
5484 case R_PPC_RELAX32PC_PLT:
5485 case R_PPC_RELAX32_PLT:
5486 BFD_ASSERT (h != NULL
5487 && h->plt.offset != (bfd_vma) -1
5488 && htab->plt != NULL);
5489
5490 relocation = (htab->plt->output_section->vma
5491 + htab->plt->output_offset
5492 + h->plt.offset);
5493 if (r_type == R_PPC_RELAX32_PLT)
5494 goto relax32;
5495 /* Fall thru */
5496
5497 case R_PPC_RELAX32PC:
5498 relocation -= (input_section->output_section->vma
5499 + input_section->output_offset
5500 + rel->r_offset - 4);
5501 /* Fall thru */
5502
5503 case R_PPC_RELAX32:
5504 relax32:
5505 {
5506 unsigned long t0;
5507 unsigned long t1;
5508
5509 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
5510 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
5511
5512 /* We're clearing the bits for R_PPC_ADDR16_HA
5513 and R_PPC_ADDR16_LO here. */
5514 t0 &= ~0xffff;
5515 t1 &= ~0xffff;
5516
5517 /* t0 is HA, t1 is LO */
5518 relocation += addend;
5519 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
5520 t1 |= relocation & 0xffff;
5521
5522 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
5523 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
5524 }
5525 continue;
5526
5527 /* Indirect .sdata relocation. */
5528 case R_PPC_EMB_SDAI16:
5529 BFD_ASSERT (htab->sdata[0].section != NULL);
5530 relocation
5531 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
5532 h, relocation, rel);
5533 break;
5534
5535 /* Indirect .sdata2 relocation. */
5536 case R_PPC_EMB_SDA2I16:
5537 BFD_ASSERT (htab->sdata[1].section != NULL);
5538 relocation
5539 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
5540 h, relocation, rel);
5541 break;
5542
5543 /* Handle the TOC16 reloc. We want to use the offset within the .got
5544 section, not the actual VMA. This is appropriate when generating
5545 an embedded ELF object, for which the .got section acts like the
5546 AIX .toc section. */
5547 case R_PPC_TOC16: /* phony GOT16 relocations */
5548 BFD_ASSERT (sec != NULL);
5549 BFD_ASSERT (bfd_is_und_section (sec)
5550 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
5551 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
5552
5553 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
5554 break;
5555
5556 case R_PPC_PLTREL24:
5557 /* Relocation is to the entry for this symbol in the
5558 procedure linkage table. */
5559 BFD_ASSERT (h != NULL);
5560
5561 if (h->plt.offset == (bfd_vma) -1
5562 || htab->plt == NULL)
5563 {
5564 /* We didn't make a PLT entry for this symbol. This
5565 happens when statically linking PIC code, or when
5566 using -Bsymbolic. */
5567 break;
5568 }
5569
5570 unresolved_reloc = FALSE;
5571 relocation = (htab->plt->output_section->vma
5572 + htab->plt->output_offset
5573 + h->plt.offset);
5574 break;
5575
5576 /* Relocate against _SDA_BASE_. */
5577 case R_PPC_SDAREL16:
5578 {
5579 const char *name;
5580
5581 BFD_ASSERT (sec != NULL);
5582 name = bfd_get_section_name (abfd, sec->output_section);
5583 if (! ((strncmp (name, ".sdata", 6) == 0
5584 && (name[6] == 0 || name[6] == '.'))
5585 || (strncmp (name, ".sbss", 5) == 0
5586 && (name[5] == 0 || name[5] == '.'))))
5587 {
5588 (*_bfd_error_handler)
5589 (_("%B: the target (%s) of a %s relocation is "
5590 "in the wrong output section (%s)"),
5591 input_bfd,
5592 sym_name,
5593 howto->name,
5594 name);
5595 }
5596 addend -= htab->sdata[0].sym_val;
5597 }
5598 break;
5599
5600 /* Relocate against _SDA2_BASE_. */
5601 case R_PPC_EMB_SDA2REL:
5602 {
5603 const char *name;
5604
5605 BFD_ASSERT (sec != NULL);
5606 name = bfd_get_section_name (abfd, sec->output_section);
5607 if (! (strncmp (name, ".sdata2", 7) == 0
5608 || strncmp (name, ".sbss2", 6) == 0))
5609 {
5610 (*_bfd_error_handler)
5611 (_("%B: the target (%s) of a %s relocation is "
5612 "in the wrong output section (%s)"),
5613 input_bfd,
5614 sym_name,
5615 howto->name,
5616 name);
5617
5618 bfd_set_error (bfd_error_bad_value);
5619 ret = FALSE;
5620 continue;
5621 }
5622 addend -= htab->sdata[1].sym_val;
5623 }
5624 break;
5625
5626 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
5627 case R_PPC_EMB_SDA21:
5628 case R_PPC_EMB_RELSDA:
5629 {
5630 const char *name;
5631 int reg;
5632
5633 BFD_ASSERT (sec != NULL);
5634 name = bfd_get_section_name (abfd, sec->output_section);
5635 if (((strncmp (name, ".sdata", 6) == 0
5636 && (name[6] == 0 || name[6] == '.'))
5637 || (strncmp (name, ".sbss", 5) == 0
5638 && (name[5] == 0 || name[5] == '.'))))
5639 {
5640 reg = 13;
5641 addend -= htab->sdata[0].sym_val;
5642 }
5643
5644 else if (strncmp (name, ".sdata2", 7) == 0
5645 || strncmp (name, ".sbss2", 6) == 0)
5646 {
5647 reg = 2;
5648 addend -= htab->sdata[1].sym_val;
5649 }
5650
5651 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
5652 || strcmp (name, ".PPC.EMB.sbss0") == 0)
5653 {
5654 reg = 0;
5655 }
5656
5657 else
5658 {
5659 (*_bfd_error_handler)
5660 (_("%B: the target (%s) of a %s relocation is "
5661 "in the wrong output section (%s)"),
5662 input_bfd,
5663 sym_name,
5664 howto->name,
5665 name);
5666
5667 bfd_set_error (bfd_error_bad_value);
5668 ret = FALSE;
5669 continue;
5670 }
5671
5672 if (r_type == R_PPC_EMB_SDA21)
5673 { /* fill in register field */
5674 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5675 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
5676 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5677 }
5678 }
5679 break;
5680
5681 /* Relocate against the beginning of the section. */
5682 case R_PPC_SECTOFF:
5683 case R_PPC_SECTOFF_LO:
5684 case R_PPC_SECTOFF_HI:
5685 case R_PPC_SECTOFF_HA:
5686 BFD_ASSERT (sec != NULL);
5687 addend -= sec->output_section->vma;
5688 break;
5689
5690 /* Negative relocations. */
5691 case R_PPC_EMB_NADDR32:
5692 case R_PPC_EMB_NADDR16:
5693 case R_PPC_EMB_NADDR16_LO:
5694 case R_PPC_EMB_NADDR16_HI:
5695 case R_PPC_EMB_NADDR16_HA:
5696 addend -= 2 * relocation;
5697 break;
5698
5699 case R_PPC_COPY:
5700 case R_PPC_GLOB_DAT:
5701 case R_PPC_JMP_SLOT:
5702 case R_PPC_RELATIVE:
5703 case R_PPC_PLT32:
5704 case R_PPC_PLTREL32:
5705 case R_PPC_PLT16_LO:
5706 case R_PPC_PLT16_HI:
5707 case R_PPC_PLT16_HA:
5708 case R_PPC_ADDR30:
5709 case R_PPC_EMB_RELSEC16:
5710 case R_PPC_EMB_RELST_LO:
5711 case R_PPC_EMB_RELST_HI:
5712 case R_PPC_EMB_RELST_HA:
5713 case R_PPC_EMB_BIT_FLD:
5714 (*_bfd_error_handler)
5715 (_("%B: relocation %s is not yet supported for symbol %s."),
5716 input_bfd,
5717 howto->name,
5718 sym_name);
5719
5720 bfd_set_error (bfd_error_invalid_operation);
5721 ret = FALSE;
5722 continue;
5723 }
5724
5725 /* Do any further special processing. */
5726 switch (r_type)
5727 {
5728 default:
5729 break;
5730
5731 case R_PPC_ADDR16_HA:
5732 case R_PPC_GOT16_HA:
5733 case R_PPC_PLT16_HA:
5734 case R_PPC_SECTOFF_HA:
5735 case R_PPC_TPREL16_HA:
5736 case R_PPC_DTPREL16_HA:
5737 case R_PPC_GOT_TLSGD16_HA:
5738 case R_PPC_GOT_TLSLD16_HA:
5739 case R_PPC_GOT_TPREL16_HA:
5740 case R_PPC_GOT_DTPREL16_HA:
5741 case R_PPC_EMB_NADDR16_HA:
5742 case R_PPC_EMB_RELST_HA:
5743 /* It's just possible that this symbol is a weak symbol
5744 that's not actually defined anywhere. In that case,
5745 'sec' would be NULL, and we should leave the symbol
5746 alone (it will be set to zero elsewhere in the link). */
5747 if (sec != NULL)
5748 /* Add 0x10000 if sign bit in 0:15 is set.
5749 Bits 0:15 are not used. */
5750 addend += 0x8000;
5751 break;
5752 }
5753
5754 #ifdef DEBUG
5755 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
5756 "offset = %ld, addend = %ld\n",
5757 howto->name,
5758 (int) r_type,
5759 sym_name,
5760 r_symndx,
5761 (long) rel->r_offset,
5762 (long) addend);
5763 #endif
5764
5765 if (unresolved_reloc
5766 && !((input_section->flags & SEC_DEBUGGING) != 0
5767 && h->def_dynamic))
5768 {
5769 (*_bfd_error_handler)
5770 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5771 input_bfd,
5772 input_section,
5773 (long) rel->r_offset,
5774 howto->name,
5775 sym_name);
5776 ret = FALSE;
5777 }
5778
5779 r = _bfd_final_link_relocate (howto,
5780 input_bfd,
5781 input_section,
5782 contents,
5783 rel->r_offset,
5784 relocation,
5785 addend);
5786
5787 if (r != bfd_reloc_ok)
5788 {
5789 if (sym_name == NULL)
5790 sym_name = "(null)";
5791 if (r == bfd_reloc_overflow)
5792 {
5793 if (warned)
5794 continue;
5795 if (h != NULL
5796 && h->root.type == bfd_link_hash_undefweak
5797 && howto->pc_relative)
5798 {
5799 /* Assume this is a call protected by other code that
5800 detect the symbol is undefined. If this is the case,
5801 we can safely ignore the overflow. If not, the
5802 program is hosed anyway, and a little warning isn't
5803 going to help. */
5804
5805 continue;
5806 }
5807
5808 if (! (*info->callbacks->reloc_overflow) (info,
5809 (h ? &h->root : NULL),
5810 sym_name,
5811 howto->name,
5812 rel->r_addend,
5813 input_bfd,
5814 input_section,
5815 rel->r_offset))
5816 return FALSE;
5817 }
5818 else
5819 {
5820 (*_bfd_error_handler)
5821 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
5822 input_bfd, input_section,
5823 (long) rel->r_offset, howto->name, sym_name, (int) r);
5824 ret = FALSE;
5825 }
5826 }
5827 }
5828
5829 #ifdef DEBUG
5830 fprintf (stderr, "\n");
5831 #endif
5832
5833 return ret;
5834 }
5835 \f
5836 /* Finish up dynamic symbol handling. We set the contents of various
5837 dynamic sections here. */
5838
5839 static bfd_boolean
5840 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
5841 struct bfd_link_info *info,
5842 struct elf_link_hash_entry *h,
5843 Elf_Internal_Sym *sym)
5844 {
5845 struct ppc_elf_link_hash_table *htab;
5846
5847 #ifdef DEBUG
5848 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
5849 h->root.root.string);
5850 #endif
5851
5852 htab = ppc_elf_hash_table (info);
5853 BFD_ASSERT (htab->elf.dynobj != NULL);
5854
5855 if (h->plt.offset != (bfd_vma) -1)
5856 {
5857 Elf_Internal_Rela rela;
5858 bfd_byte *loc;
5859 bfd_vma reloc_index;
5860
5861 #ifdef DEBUG
5862 fprintf (stderr, ", plt_offset = %d", h->plt.offset);
5863 #endif
5864
5865 /* This symbol has an entry in the procedure linkage table. Set
5866 it up. */
5867
5868 BFD_ASSERT (h->dynindx != -1);
5869 BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
5870
5871 /* We don't need to fill in the .plt. The ppc dynamic linker
5872 will fill it in. */
5873
5874 /* Fill in the entry in the .rela.plt section. */
5875 rela.r_offset = (htab->plt->output_section->vma
5876 + htab->plt->output_offset
5877 + h->plt.offset);
5878 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
5879 rela.r_addend = 0;
5880
5881 reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
5882 if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
5883 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
5884 loc = (htab->relplt->contents
5885 + reloc_index * sizeof (Elf32_External_Rela));
5886 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5887
5888 if (!h->def_regular)
5889 {
5890 /* Mark the symbol as undefined, rather than as defined in
5891 the .plt section. Leave the value alone. */
5892 sym->st_shndx = SHN_UNDEF;
5893 /* If the symbol is weak, we do need to clear the value.
5894 Otherwise, the PLT entry would provide a definition for
5895 the symbol even if the symbol wasn't defined anywhere,
5896 and so the symbol would never be NULL. */
5897 if (!h->ref_regular_nonweak)
5898 sym->st_value = 0;
5899 }
5900 }
5901
5902 if (h->needs_copy)
5903 {
5904 asection *s;
5905 Elf_Internal_Rela rela;
5906 bfd_byte *loc;
5907
5908 /* This symbols needs a copy reloc. Set it up. */
5909
5910 #ifdef DEBUG
5911 fprintf (stderr, ", copy");
5912 #endif
5913
5914 BFD_ASSERT (h->dynindx != -1);
5915
5916 if (h->size <= elf_gp_size (htab->elf.dynobj))
5917 s = htab->relsbss;
5918 else
5919 s = htab->relbss;
5920 BFD_ASSERT (s != NULL);
5921
5922 rela.r_offset = (h->root.u.def.value
5923 + h->root.u.def.section->output_section->vma
5924 + h->root.u.def.section->output_offset);
5925 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
5926 rela.r_addend = 0;
5927 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
5928 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5929 }
5930
5931 #ifdef DEBUG
5932 fprintf (stderr, "\n");
5933 #endif
5934
5935 /* Mark some specially defined symbols as absolute. */
5936 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5937 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
5938 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
5939 sym->st_shndx = SHN_ABS;
5940
5941 return TRUE;
5942 }
5943 \f
5944 static enum elf_reloc_type_class
5945 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
5946 {
5947 switch (ELF32_R_TYPE (rela->r_info))
5948 {
5949 case R_PPC_RELATIVE:
5950 return reloc_class_relative;
5951 case R_PPC_REL24:
5952 case R_PPC_ADDR24:
5953 case R_PPC_JMP_SLOT:
5954 return reloc_class_plt;
5955 case R_PPC_COPY:
5956 return reloc_class_copy;
5957 default:
5958 return reloc_class_normal;
5959 }
5960 }
5961 \f
5962 /* Finish up the dynamic sections. */
5963
5964 static bfd_boolean
5965 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
5966 struct bfd_link_info *info)
5967 {
5968 asection *sdyn;
5969 struct ppc_elf_link_hash_table *htab;
5970
5971 #ifdef DEBUG
5972 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
5973 #endif
5974
5975 htab = ppc_elf_hash_table (info);
5976 sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
5977
5978 if (htab->elf.dynamic_sections_created)
5979 {
5980 Elf32_External_Dyn *dyncon, *dynconend;
5981
5982 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
5983
5984 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5985 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5986 for (; dyncon < dynconend; dyncon++)
5987 {
5988 Elf_Internal_Dyn dyn;
5989 asection *s;
5990
5991 bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
5992
5993 switch (dyn.d_tag)
5994 {
5995 case DT_PLTGOT:
5996 s = htab->plt;
5997 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5998 break;
5999
6000 case DT_PLTRELSZ:
6001 dyn.d_un.d_val = htab->relplt->size;
6002 break;
6003
6004 case DT_JMPREL:
6005 s = htab->relplt;
6006 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6007 break;
6008
6009 default:
6010 continue;
6011 }
6012
6013 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
6014 }
6015 }
6016
6017 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
6018 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
6019 if (htab->got)
6020 {
6021 unsigned char *contents = htab->got->contents;
6022 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
6023
6024 if (sdyn == NULL)
6025 bfd_put_32 (output_bfd, 0, contents + 4);
6026 else
6027 bfd_put_32 (output_bfd,
6028 sdyn->output_section->vma + sdyn->output_offset,
6029 contents + 4);
6030
6031 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
6032 }
6033
6034 return TRUE;
6035 }
6036 \f
6037 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
6038 #define TARGET_LITTLE_NAME "elf32-powerpcle"
6039 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
6040 #define TARGET_BIG_NAME "elf32-powerpc"
6041 #define ELF_ARCH bfd_arch_powerpc
6042 #define ELF_MACHINE_CODE EM_PPC
6043 #ifdef __QNXTARGET__
6044 #define ELF_MAXPAGESIZE 0x1000
6045 #else
6046 #define ELF_MAXPAGESIZE 0x10000
6047 #endif
6048 #define ELF_MINPAGESIZE 0x1000
6049 #define elf_info_to_howto ppc_elf_info_to_howto
6050
6051 #ifdef EM_CYGNUS_POWERPC
6052 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
6053 #endif
6054
6055 #ifdef EM_PPC_OLD
6056 #define ELF_MACHINE_ALT2 EM_PPC_OLD
6057 #endif
6058
6059 #define elf_backend_plt_not_loaded 1
6060 #define elf_backend_got_symbol_offset 4
6061 #define elf_backend_can_gc_sections 1
6062 #define elf_backend_can_refcount 1
6063 #define elf_backend_got_header_size 12
6064 #define elf_backend_rela_normal 1
6065
6066 #define bfd_elf32_mkobject ppc_elf_mkobject
6067 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
6068 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
6069 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
6070 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
6071 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
6072
6073 #define elf_backend_object_p ppc_elf_object_p
6074 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
6075 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
6076 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
6077 #define elf_backend_relocate_section ppc_elf_relocate_section
6078 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
6079 #define elf_backend_check_relocs ppc_elf_check_relocs
6080 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
6081 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
6082 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
6083 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
6084 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
6085 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
6086 #define elf_backend_fake_sections ppc_elf_fake_sections
6087 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
6088 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
6089 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
6090 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
6091 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
6092 #define elf_backend_final_write_processing ppc_elf_final_write_processing
6093 #define elf_backend_write_section ppc_elf_write_section
6094 #define elf_backend_special_sections ppc_elf_special_sections
6095 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
6096
6097 #include "elf32-target.h"
GDB Binutils - Deliverables
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