projects / deliverable / binutils-gdb.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
*** empty log message ***
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
... / ...
CommitLineData
1/* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 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 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24/* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29#include "sysdep.h"
30#include <stdarg.h>
31#include "bfd.h"
32#include "bfdlink.h"
33#include "libbfd.h"
34#include "elf-bfd.h"
35#include "elf/ppc.h"
36#include "elf32-ppc.h"
37#include "elf-vxworks.h"
38
39/* RELA relocations are used here. */
40
41static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46/* Branch prediction bit for branch taken relocs. */
47#define BRANCH_PREDICT_BIT 0x200000
48/* Mask to set RA in memory instructions. */
49#define RA_REGISTER_MASK 0x001f0000
50/* Value to shift register by to insert RA. */
51#define RA_REGISTER_SHIFT 16
52
53/* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57/* For old-style PLT. */
58/* The number of single-slot PLT entries (the rest use two slots). */
59#define PLT_NUM_SINGLE_ENTRIES 8192
60
61/* For new-style .glink and .plt. */
62#define GLINK_PLTRESOLVE 16*4
63#define GLINK_ENTRY_SIZE 4*4
64
65/* VxWorks uses its own plt layout, filled in by the static linker. */
66
67/* The standard VxWorks PLT entry. */
68#define VXWORKS_PLT_ENTRY_SIZE 32
69static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94/* The initial VxWorks PLT entry. */
95#define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121/* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124/* The number of non-JMP_SLOT relocations per PLT0 slot. */
125#define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126/* The number of relocations in the PLTResolve slot. */
127#define VXWORKS_PLTRESOLVE_RELOCS 2
128/* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130#define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132/* Some instructions. */
133#define ADDIS_11_11 0x3d6b0000
134#define ADDIS_11_30 0x3d7e0000
135#define ADDIS_12_12 0x3d8c0000
136#define ADDI_11_11 0x396b0000
137#define ADD_0_11_11 0x7c0b5a14
138#define ADD_11_0_11 0x7d605a14
139#define B 0x48000000
140#define BCL_20_31 0x429f0005
141#define BCTR 0x4e800420
142#define LIS_11 0x3d600000
143#define LIS_12 0x3d800000
144#define LWZU_0_12 0x840c0000
145#define LWZ_0_12 0x800c0000
146#define LWZ_11_11 0x816b0000
147#define LWZ_11_30 0x817e0000
148#define LWZ_12_12 0x818c0000
149#define MFLR_0 0x7c0802a6
150#define MFLR_12 0x7d8802a6
151#define MTCTR_0 0x7c0903a6
152#define MTCTR_11 0x7d6903a6
153#define MTLR_0 0x7c0803a6
154#define NOP 0x60000000
155#define SUB_11_11_12 0x7d6c5850
156
157/* Offset of tp and dtp pointers from start of TLS block. */
158#define TP_OFFSET 0x7000
159#define DTP_OFFSET 0x8000
160\f
161static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
163static reloc_howto_type ppc_elf_howto_raw[] = {
164 /* This reloc does nothing. */
165 HOWTO (R_PPC_NONE, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 FALSE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_PPC_NONE", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0, /* dst_mask */
177 FALSE), /* pcrel_offset */
178
179 /* A standard 32 bit relocation. */
180 HOWTO (R_PPC_ADDR32, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_ADDR32", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0xffffffff, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* An absolute 26 bit branch; the lower two bits must be zero.
195 FIXME: we don't check that, we just clear them. */
196 HOWTO (R_PPC_ADDR24, /* type */
197 0, /* rightshift */
198 2, /* size (0 = byte, 1 = short, 2 = long) */
199 26, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_PPC_ADDR24", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0x3fffffc, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 /* A standard 16 bit relocation. */
211 HOWTO (R_PPC_ADDR16, /* type */
212 0, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 16, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR16", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A 16 bit relocation without overflow. */
226 HOWTO (R_PPC_ADDR16_LO, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16_LO", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* The high order 16 bits of an address. */
241 HOWTO (R_PPC_ADDR16_HI, /* type */
242 16, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_HI", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address, plus 1 if the contents of
256 the low 16 bits, treated as a signed number, is negative. */
257 HOWTO (R_PPC_ADDR16_HA, /* type */
258 16, /* rightshift */
259 1, /* size (0 = byte, 1 = short, 2 = long) */
260 16, /* bitsize */
261 FALSE, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 ppc_elf_addr16_ha_reloc, /* special_function */
265 "R_PPC_ADDR16_HA", /* name */
266 FALSE, /* partial_inplace */
267 0, /* src_mask */
268 0xffff, /* dst_mask */
269 FALSE), /* pcrel_offset */
270
271 /* An absolute 16 bit branch; the lower two bits must be zero.
272 FIXME: we don't check that, we just clear them. */
273 HOWTO (R_PPC_ADDR14, /* type */
274 0, /* rightshift */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_bitfield, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC_ADDR14", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xfffc, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* An absolute 16 bit branch, for which bit 10 should be set to
288 indicate that the branch is expected to be taken. The lower two
289 bits must be zero. */
290 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 16, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC_ADDR14_BRTAKEN",/* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0xfffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* An absolute 16 bit branch, for which bit 10 should be set to
305 indicate that the branch is not expected to be taken. The lower
306 two bits must be zero. */
307 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC_ADDR14_BRNTAKEN",/* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xfffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A relative 26 bit branch; the lower two bits must be zero. */
322 HOWTO (R_PPC_REL24, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 26, /* bitsize */
326 TRUE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_REL24", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0x3fffffc, /* dst_mask */
334 TRUE), /* pcrel_offset */
335
336 /* A relative 16 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL14, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL14", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xfffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch. Bit 10 should be set to indicate that
352 the branch is expected to be taken. The lower two bits must be
353 zero. */
354 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 TRUE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC_REL14_BRTAKEN", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xfffc, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 /* A relative 16 bit branch. Bit 10 should be set to indicate that
369 the branch is not expected to be taken. The lower two bits must
370 be zero. */
371 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 TRUE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_PPC_REL14_BRNTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0xfffc, /* dst_mask */
383 TRUE), /* pcrel_offset */
384
385 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
386 symbol. */
387 HOWTO (R_PPC_GOT16, /* type */
388 0, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_PPC_GOT16", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC_GOT16_LO, /* type */
404 0, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_PPC_GOT16_LO", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
418 the symbol. */
419 HOWTO (R_PPC_GOT16_HI, /* type */
420 16, /* rightshift */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_PPC_GOT16_HI", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
434 the symbol. */
435 HOWTO (R_PPC_GOT16_HA, /* type */
436 16, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_bitfield, /* complain_on_overflow */
442 ppc_elf_addr16_ha_reloc, /* special_function */
443 "R_PPC_GOT16_HA", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Like R_PPC_REL24, but referring to the procedure linkage table
450 entry for the symbol. */
451 HOWTO (R_PPC_PLTREL24, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 26, /* bitsize */
455 TRUE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_signed, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_PPC_PLTREL24", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0x3fffffc, /* dst_mask */
463 TRUE), /* pcrel_offset */
464
465 /* This is used only by the dynamic linker. The symbol should exist
466 both in the object being run and in some shared library. The
467 dynamic linker copies the data addressed by the symbol from the
468 shared library into the object, because the object being
469 run has to have the data at some particular address. */
470 HOWTO (R_PPC_COPY, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 32, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_bitfield, /* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_PPC_COPY", /* name */
479 FALSE, /* partial_inplace */
480 0, /* src_mask */
481 0, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* Like R_PPC_ADDR32, but used when setting global offset table
485 entries. */
486 HOWTO (R_PPC_GLOB_DAT, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC_GLOB_DAT", /* name */
495 FALSE, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* Marks a procedure linkage table entry for a symbol. */
501 HOWTO (R_PPC_JMP_SLOT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_JMP_SLOT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Used only by the dynamic linker. When the object is run, this
516 longword is set to the load address of the object, plus the
517 addend. */
518 HOWTO (R_PPC_RELATIVE, /* type */
519 0, /* rightshift */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
521 32, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_bitfield, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_PPC_RELATIVE", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0xffffffff, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Like R_PPC_REL24, but uses the value of the symbol within the
533 object rather than the final value. Normally used for
534 _GLOBAL_OFFSET_TABLE_. */
535 HOWTO (R_PPC_LOCAL24PC, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 26, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_signed, /* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_PPC_LOCAL24PC", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0x3fffffc, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 /* Like R_PPC_ADDR32, but may be unaligned. */
550 HOWTO (R_PPC_UADDR32, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 32, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_bitfield, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_UADDR32", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0xffffffff, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR16, but may be unaligned. */
565 HOWTO (R_PPC_UADDR16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR16", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* 32-bit PC relative */
580 HOWTO (R_PPC_REL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_REL32", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffffffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
593
594 /* 32-bit relocation to the symbol's procedure linkage table.
595 FIXME: not supported. */
596 HOWTO (R_PPC_PLT32, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC_PLT32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611 FIXME: not supported. */
612 HOWTO (R_PPC_PLTREL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC_PLTREL32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0, /* dst_mask */
624 TRUE), /* pcrel_offset */
625
626 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
627 the symbol. */
628 HOWTO (R_PPC_PLT16_LO, /* type */
629 0, /* rightshift */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_dont, /* complain_on_overflow */
635 bfd_elf_generic_reloc, /* special_function */
636 "R_PPC_PLT16_LO", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
643 the symbol. */
644 HOWTO (R_PPC_PLT16_HI, /* type */
645 16, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC_PLT16_HI", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC_PLT16_HA, /* type */
661 16, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_bitfield, /* complain_on_overflow */
667 ppc_elf_addr16_ha_reloc, /* special_function */
668 "R_PPC_PLT16_HA", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
675 small data items. */
676 HOWTO (R_PPC_SDAREL16, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_signed, /* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_PPC_SDAREL16", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 16-bit section relative relocation. */
691 HOWTO (R_PPC_SECTOFF, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_bitfield, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SECTOFF", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit lower half section relative relocation. */
706 HOWTO (R_PPC_SECTOFF_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit upper half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_HI, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_bitfield, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_HI", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half adjusted section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 ppc_elf_addr16_ha_reloc, /* special_function */
744 "R_PPC_SECTOFF_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Marker reloc for TLS. */
751 HOWTO (R_PPC_TLS,
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 32, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_TLS", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Computes the load module index of the load module that contains the
766 definition of its TLS sym. */
767 HOWTO (R_PPC_DTPMOD32,
768 0, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 32, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 ppc_elf_unhandled_reloc, /* special_function */
775 "R_PPC_DTPMOD32", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xffffffff, /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* Computes a dtv-relative displacement, the difference between the value
782 of sym+add and the base address of the thread-local storage block that
783 contains the definition of sym, minus 0x8000. */
784 HOWTO (R_PPC_DTPREL32,
785 0, /* rightshift */
786 2, /* size (0 = byte, 1 = short, 2 = long) */
787 32, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 ppc_elf_unhandled_reloc, /* special_function */
792 "R_PPC_DTPREL32", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 0xffffffff, /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* A 16 bit dtprel reloc. */
799 HOWTO (R_PPC_DTPREL16,
800 0, /* rightshift */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
802 16, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_signed, /* complain_on_overflow */
806 ppc_elf_unhandled_reloc, /* special_function */
807 "R_PPC_DTPREL16", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xffff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* Like DTPREL16, but no overflow. */
814 HOWTO (R_PPC_DTPREL16_LO,
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 ppc_elf_unhandled_reloc, /* special_function */
822 "R_PPC_DTPREL16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like DTPREL16_LO, but next higher group of 16 bits. */
829 HOWTO (R_PPC_DTPREL16_HI,
830 16, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc_elf_unhandled_reloc, /* special_function */
837 "R_PPC_DTPREL16_HI", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like DTPREL16_HI, but adjust for low 16 bits. */
844 HOWTO (R_PPC_DTPREL16_HA,
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc_elf_unhandled_reloc, /* special_function */
852 "R_PPC_DTPREL16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* Computes a tp-relative displacement, the difference between the value of
859 sym+add and the value of the thread pointer (r13). */
860 HOWTO (R_PPC_TPREL32,
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 ppc_elf_unhandled_reloc, /* special_function */
868 "R_PPC_TPREL32", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* A 16 bit tprel reloc. */
875 HOWTO (R_PPC_TPREL16,
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_signed, /* complain_on_overflow */
882 ppc_elf_unhandled_reloc, /* special_function */
883 "R_PPC_TPREL16", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like TPREL16, but no overflow. */
890 HOWTO (R_PPC_TPREL16_LO,
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc_elf_unhandled_reloc, /* special_function */
898 "R_PPC_TPREL16_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like TPREL16_LO, but next higher group of 16 bits. */
905 HOWTO (R_PPC_TPREL16_HI,
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 ppc_elf_unhandled_reloc, /* special_function */
913 "R_PPC_TPREL16_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* Like TPREL16_HI, but adjust for low 16 bits. */
920 HOWTO (R_PPC_TPREL16_HA,
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc_elf_unhandled_reloc, /* special_function */
928 "R_PPC_TPREL16_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
935 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
936 to the first entry. */
937 HOWTO (R_PPC_GOT_TLSGD16,
938 0, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_signed, /* complain_on_overflow */
944 ppc_elf_unhandled_reloc, /* special_function */
945 "R_PPC_GOT_TLSGD16", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Like GOT_TLSGD16, but no overflow. */
952 HOWTO (R_PPC_GOT_TLSGD16_LO,
953 0, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc_elf_unhandled_reloc, /* special_function */
960 "R_PPC_GOT_TLSGD16_LO", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
967 HOWTO (R_PPC_GOT_TLSGD16_HI,
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc_elf_unhandled_reloc, /* special_function */
975 "R_PPC_GOT_TLSGD16_HI", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
982 HOWTO (R_PPC_GOT_TLSGD16_HA,
983 16, /* rightshift */
984 1, /* size (0 = byte, 1 = short, 2 = long) */
985 16, /* bitsize */
986 FALSE, /* pc_relative */
987 0, /* bitpos */
988 complain_overflow_dont, /* complain_on_overflow */
989 ppc_elf_unhandled_reloc, /* special_function */
990 "R_PPC_GOT_TLSGD16_HA", /* name */
991 FALSE, /* partial_inplace */
992 0, /* src_mask */
993 0xffff, /* dst_mask */
994 FALSE), /* pcrel_offset */
995
996 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
997 with values (sym+add)@dtpmod and zero, and computes the offset to the
998 first entry. */
999 HOWTO (R_PPC_GOT_TLSLD16,
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_signed, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_GOT_TLSLD16", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like GOT_TLSLD16, but no overflow. */
1014 HOWTO (R_PPC_GOT_TLSLD16_LO,
1015 0, /* rightshift */
1016 1, /* size (0 = byte, 1 = short, 2 = long) */
1017 16, /* bitsize */
1018 FALSE, /* pc_relative */
1019 0, /* bitpos */
1020 complain_overflow_dont, /* complain_on_overflow */
1021 ppc_elf_unhandled_reloc, /* special_function */
1022 "R_PPC_GOT_TLSLD16_LO", /* name */
1023 FALSE, /* partial_inplace */
1024 0, /* src_mask */
1025 0xffff, /* dst_mask */
1026 FALSE), /* pcrel_offset */
1027
1028 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1029 HOWTO (R_PPC_GOT_TLSLD16_HI,
1030 16, /* rightshift */
1031 1, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 ppc_elf_unhandled_reloc, /* special_function */
1037 "R_PPC_GOT_TLSLD16_HI", /* name */
1038 FALSE, /* partial_inplace */
1039 0, /* src_mask */
1040 0xffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1044 HOWTO (R_PPC_GOT_TLSLD16_HA,
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_GOT_TLSLD16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1059 the offset to the entry. */
1060 HOWTO (R_PPC_GOT_DTPREL16,
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 ppc_elf_unhandled_reloc, /* special_function */
1068 "R_PPC_GOT_DTPREL16", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like GOT_DTPREL16, but no overflow. */
1075 HOWTO (R_PPC_GOT_DTPREL16_LO,
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont, /* complain_on_overflow */
1082 ppc_elf_unhandled_reloc, /* special_function */
1083 "R_PPC_GOT_DTPREL16_LO", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xffff, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1090 HOWTO (R_PPC_GOT_DTPREL16_HI,
1091 16, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc_elf_unhandled_reloc, /* special_function */
1098 "R_PPC_GOT_DTPREL16_HI", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xffff, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1105 HOWTO (R_PPC_GOT_DTPREL16_HA,
1106 16, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc_elf_unhandled_reloc, /* special_function */
1113 "R_PPC_GOT_DTPREL16_HA", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1120 offset to the entry. */
1121 HOWTO (R_PPC_GOT_TPREL16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TPREL16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TPREL16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TPREL16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TPREL16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TPREL16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TPREL16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TPREL16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TPREL16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* The remaining relocs are from the Embedded ELF ABI, and are not
1181 in the SVR4 ELF ABI. */
1182
1183 /* 32 bit value resulting from the addend minus the symbol. */
1184 HOWTO (R_PPC_EMB_NADDR32, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield, /* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_PPC_EMB_NADDR32", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* 16 bit value resulting from the addend minus the symbol. */
1199 HOWTO (R_PPC_EMB_NADDR16, /* type */
1200 0, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_bitfield, /* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_PPC_EMB_NADDR16", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* 16 bit value resulting from the addend minus the symbol. */
1214 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1215 0, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont,/* complain_on_overflow */
1221 bfd_elf_generic_reloc, /* special_function */
1222 "R_PPC_EMB_ADDR16_LO", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* The high order 16 bits of the addend minus the symbol. */
1229 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1230 16, /* rightshift */
1231 1, /* size (0 = byte, 1 = short, 2 = long) */
1232 16, /* bitsize */
1233 FALSE, /* pc_relative */
1234 0, /* bitpos */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 bfd_elf_generic_reloc, /* special_function */
1237 "R_PPC_EMB_NADDR16_HI", /* name */
1238 FALSE, /* partial_inplace */
1239 0, /* src_mask */
1240 0xffff, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1242
1243 /* The high order 16 bits of the result of the addend minus the address,
1244 plus 1 if the contents of the low 16 bits, treated as a signed number,
1245 is negative. */
1246 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1247 16, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc_elf_addr16_ha_reloc, /* special_function */
1254 "R_PPC_EMB_NADDR16_HA", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* 16 bit value resulting from allocating a 4 byte word to hold an
1261 address in the .sdata section, and returning the offset from
1262 _SDA_BASE_ for that relocation. */
1263 HOWTO (R_PPC_EMB_SDAI16, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_bitfield, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_SDAI16", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* 16 bit value resulting from allocating a 4 byte word to hold an
1278 address in the .sdata2 section, and returning the offset from
1279 _SDA2_BASE_ for that relocation. */
1280 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1281 0, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_SDA2I16", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1295 small data items. */
1296 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_signed, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC_EMB_SDA2REL", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1311 signed offset from the appropriate base, and filling in the register
1312 field with the appropriate register (0, 2, or 13). */
1313 HOWTO (R_PPC_EMB_SDA21, /* type */
1314 0, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_PPC_EMB_SDA21", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* Relocation not handled: R_PPC_EMB_MRKREF */
1328 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1329 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1331 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1332 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333
1334 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1335 in the 16 bit signed offset from the appropriate base, and filling in the
1336 register field with the appropriate register (0, 2, or 13). */
1337 HOWTO (R_PPC_EMB_RELSDA, /* type */
1338 0, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 TRUE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_signed, /* complain_on_overflow */
1344 bfd_elf_generic_reloc, /* special_function */
1345 "R_PPC_EMB_RELSDA", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* A 16 bit relative relocation. */
1352 HOWTO (R_PPC_REL16, /* type */
1353 0, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 TRUE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_bitfield, /* complain_on_overflow */
1359 bfd_elf_generic_reloc, /* special_function */
1360 "R_PPC_REL16", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 TRUE), /* pcrel_offset */
1365
1366 /* A 16 bit relative relocation without overflow. */
1367 HOWTO (R_PPC_REL16_LO, /* type */
1368 0, /* rightshift */
1369 1, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 TRUE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_dont,/* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_REL16_LO", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 TRUE), /* pcrel_offset */
1380
1381 /* The high order 16 bits of a relative address. */
1382 HOWTO (R_PPC_REL16_HI, /* type */
1383 16, /* rightshift */
1384 1, /* size (0 = byte, 1 = short, 2 = long) */
1385 16, /* bitsize */
1386 TRUE, /* pc_relative */
1387 0, /* bitpos */
1388 complain_overflow_dont, /* complain_on_overflow */
1389 bfd_elf_generic_reloc, /* special_function */
1390 "R_PPC_REL16_HI", /* name */
1391 FALSE, /* partial_inplace */
1392 0, /* src_mask */
1393 0xffff, /* dst_mask */
1394 TRUE), /* pcrel_offset */
1395
1396 /* The high order 16 bits of a relative address, plus 1 if the contents of
1397 the low 16 bits, treated as a signed number, is negative. */
1398 HOWTO (R_PPC_REL16_HA, /* type */
1399 16, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 TRUE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc_elf_addr16_ha_reloc, /* special_function */
1406 "R_PPC_REL16_HA", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 TRUE), /* pcrel_offset */
1411
1412 /* GNU extension to record C++ vtable hierarchy. */
1413 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1414 0, /* rightshift */
1415 0, /* size (0 = byte, 1 = short, 2 = long) */
1416 0, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 NULL, /* special_function */
1421 "R_PPC_GNU_VTINHERIT", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* GNU extension to record C++ vtable member usage. */
1428 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 0, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 NULL, /* special_function */
1436 "R_PPC_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Phony reloc to handle AIX style TOC entries. */
1443 HOWTO (R_PPC_TOC16, /* type */
1444 0, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_signed, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_PPC_TOC16", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456};
1457\f
1458/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1459
1460static void
1461ppc_elf_howto_init (void)
1462{
1463 unsigned int i, type;
1464
1465 for (i = 0;
1466 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1467 i++)
1468 {
1469 type = ppc_elf_howto_raw[i].type;
1470 if (type >= (sizeof (ppc_elf_howto_table)
1471 / sizeof (ppc_elf_howto_table[0])))
1472 abort ();
1473 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1474 }
1475}
1476
1477static reloc_howto_type *
1478ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1479 bfd_reloc_code_real_type code)
1480{
1481 enum elf_ppc_reloc_type r;
1482
1483 /* Initialize howto table if not already done. */
1484 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1485 ppc_elf_howto_init ();
1486
1487 switch (code)
1488 {
1489 default:
1490 return NULL;
1491
1492 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1493 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1494 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1495 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1496 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1497 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1498 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1499 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1500 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1501 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1502 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1503 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1504 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1505 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1506 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1507 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1508 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1509 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1510 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1511 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1512 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1513 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1514 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1515 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1516 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1517 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1518 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1519 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1520 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1521 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1522 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1523 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1524 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1525 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1526 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1527 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1528 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1529 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1530 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1531 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1532 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1533 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1534 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1535 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1536 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1537 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1538 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1542 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1546 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1550 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1554 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1555 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1559 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1560 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1562 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1563 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1564 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1565 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1566 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1568 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1569 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1570 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1571 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1572 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1573 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1574 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1575 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1576 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1577 }
1578
1579 return ppc_elf_howto_table[r];
1580};
1581
1582static reloc_howto_type *
1583ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1584 const char *r_name)
1585{
1586 unsigned int i;
1587
1588 for (i = 0;
1589 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1590 i++)
1591 if (ppc_elf_howto_raw[i].name != NULL
1592 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1593 return &ppc_elf_howto_raw[i];
1594
1595 return NULL;
1596}
1597
1598/* Set the howto pointer for a PowerPC ELF reloc. */
1599
1600static void
1601ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1602 arelent *cache_ptr,
1603 Elf_Internal_Rela *dst)
1604{
1605 /* Initialize howto table if not already done. */
1606 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1607 ppc_elf_howto_init ();
1608
1609 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1610 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1611
1612 /* Just because the above assert didn't trigger doesn't mean that
1613 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1614 if (!cache_ptr->howto)
1615 {
1616 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1617 abfd, ELF32_R_TYPE (dst->r_info));
1618 bfd_set_error (bfd_error_bad_value);
1619
1620 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1621 }
1622}
1623
1624/* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1625
1626static bfd_reloc_status_type
1627ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1628 arelent *reloc_entry,
1629 asymbol *symbol,
1630 void *data ATTRIBUTE_UNUSED,
1631 asection *input_section,
1632 bfd *output_bfd,
1633 char **error_message ATTRIBUTE_UNUSED)
1634{
1635 bfd_vma relocation;
1636
1637 if (output_bfd != NULL)
1638 {
1639 reloc_entry->address += input_section->output_offset;
1640 return bfd_reloc_ok;
1641 }
1642
1643 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1644 return bfd_reloc_outofrange;
1645
1646 if (bfd_is_com_section (symbol->section))
1647 relocation = 0;
1648 else
1649 relocation = symbol->value;
1650
1651 relocation += symbol->section->output_section->vma;
1652 relocation += symbol->section->output_offset;
1653 relocation += reloc_entry->addend;
1654 if (reloc_entry->howto->pc_relative)
1655 relocation -= reloc_entry->address;
1656
1657 reloc_entry->addend += (relocation & 0x8000) << 1;
1658
1659 return bfd_reloc_continue;
1660}
1661
1662static bfd_reloc_status_type
1663ppc_elf_unhandled_reloc (bfd *abfd,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message)
1670{
1671 /* If this is a relocatable link (output_bfd test tells us), just
1672 call the generic function. Any adjustment will be done at final
1673 link time. */
1674 if (output_bfd != NULL)
1675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1676 input_section, output_bfd, error_message);
1677
1678 if (error_message != NULL)
1679 {
1680 static char buf[60];
1681 sprintf (buf, _("generic linker can't handle %s"),
1682 reloc_entry->howto->name);
1683 *error_message = buf;
1684 }
1685 return bfd_reloc_dangerous;
1686}
1687\f
1688/* Sections created by the linker. */
1689
1690typedef struct elf_linker_section
1691{
1692 /* Pointer to the bfd section. */
1693 asection *section;
1694 /* Section name. */
1695 const char *name;
1696 /* Associated bss section name. */
1697 const char *bss_name;
1698 /* Associated symbol name. */
1699 const char *sym_name;
1700 /* Associated symbol. */
1701 struct elf_link_hash_entry *sym;
1702} elf_linker_section_t;
1703
1704/* Linked list of allocated pointer entries. This hangs off of the
1705 symbol lists, and provides allows us to return different pointers,
1706 based on different addend's. */
1707
1708typedef struct elf_linker_section_pointers
1709{
1710 /* next allocated pointer for this symbol */
1711 struct elf_linker_section_pointers *next;
1712 /* offset of pointer from beginning of section */
1713 bfd_vma offset;
1714 /* addend used */
1715 bfd_vma addend;
1716 /* which linker section this is */
1717 elf_linker_section_t *lsect;
1718} elf_linker_section_pointers_t;
1719
1720struct ppc_elf_obj_tdata
1721{
1722 struct elf_obj_tdata elf;
1723
1724 /* A mapping from local symbols to offsets into the various linker
1725 sections added. This is index by the symbol index. */
1726 elf_linker_section_pointers_t **linker_section_pointers;
1727
1728 /* Flags used to auto-detect plt type. */
1729 unsigned int makes_plt_call : 1;
1730 unsigned int has_rel16 : 1;
1731};
1732
1733#define ppc_elf_tdata(bfd) \
1734 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1735
1736#define elf_local_ptr_offsets(bfd) \
1737 (ppc_elf_tdata (bfd)->linker_section_pointers)
1738
1739/* Override the generic function because we store some extras. */
1740
1741static bfd_boolean
1742ppc_elf_mkobject (bfd *abfd)
1743{
1744 if (abfd->tdata.any == NULL)
1745 {
1746 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1747 abfd->tdata.any = bfd_zalloc (abfd, amt);
1748 if (abfd->tdata.any == NULL)
1749 return FALSE;
1750 }
1751 return bfd_elf_mkobject (abfd);
1752}
1753
1754/* Fix bad default arch selected for a 32 bit input bfd when the
1755 default is 64 bit. */
1756
1757static bfd_boolean
1758ppc_elf_object_p (bfd *abfd)
1759{
1760 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1761 {
1762 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1763
1764 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1765 {
1766 /* Relies on arch after 64 bit default being 32 bit default. */
1767 abfd->arch_info = abfd->arch_info->next;
1768 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1769 }
1770 }
1771 return TRUE;
1772}
1773
1774/* Function to set whether a module needs the -mrelocatable bit set. */
1775
1776static bfd_boolean
1777ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1778{
1779 BFD_ASSERT (!elf_flags_init (abfd)
1780 || elf_elfheader (abfd)->e_flags == flags);
1781
1782 elf_elfheader (abfd)->e_flags = flags;
1783 elf_flags_init (abfd) = TRUE;
1784 return TRUE;
1785}
1786
1787/* Support for core dump NOTE sections. */
1788
1789static bfd_boolean
1790ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1791{
1792 int offset;
1793 unsigned int size;
1794
1795 switch (note->descsz)
1796 {
1797 default:
1798 return FALSE;
1799
1800 case 268: /* Linux/PPC. */
1801 /* pr_cursig */
1802 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1803
1804 /* pr_pid */
1805 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1806
1807 /* pr_reg */
1808 offset = 72;
1809 size = 192;
1810
1811 break;
1812 }
1813
1814 /* Make a ".reg/999" section. */
1815 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1816 size, note->descpos + offset);
1817}
1818
1819static bfd_boolean
1820ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1821{
1822 switch (note->descsz)
1823 {
1824 default:
1825 return FALSE;
1826
1827 case 128: /* Linux/PPC elf_prpsinfo. */
1828 elf_tdata (abfd)->core_program
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1830 elf_tdata (abfd)->core_command
1831 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1832 }
1833
1834 /* Note that for some reason, a spurious space is tacked
1835 onto the end of the args in some (at least one anyway)
1836 implementations, so strip it off if it exists. */
1837
1838 {
1839 char *command = elf_tdata (abfd)->core_command;
1840 int n = strlen (command);
1841
1842 if (0 < n && command[n - 1] == ' ')
1843 command[n - 1] = '\0';
1844 }
1845
1846 return TRUE;
1847}
1848
1849static char *
1850ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1851{
1852 switch (note_type)
1853 {
1854 default:
1855 return NULL;
1856
1857 case NT_PRPSINFO:
1858 {
1859 char data[128];
1860 va_list ap;
1861
1862 va_start (ap, note_type);
1863 memset (data, 0, 32);
1864 strncpy (data + 32, va_arg (ap, const char *), 16);
1865 strncpy (data + 48, va_arg (ap, const char *), 80);
1866 va_end (ap);
1867 return elfcore_write_note (abfd, buf, bufsiz,
1868 "CORE", note_type, data, sizeof (data));
1869 }
1870
1871 case NT_PRSTATUS:
1872 {
1873 char data[268];
1874 va_list ap;
1875 long pid;
1876 int cursig;
1877 const void *greg;
1878
1879 va_start (ap, note_type);
1880 memset (data, 0, 72);
1881 pid = va_arg (ap, long);
1882 bfd_put_32 (abfd, pid, data + 24);
1883 cursig = va_arg (ap, int);
1884 bfd_put_16 (abfd, cursig, data + 12);
1885 greg = va_arg (ap, const void *);
1886 memcpy (data + 72, greg, 192);
1887 memset (data + 264, 0, 4);
1888 va_end (ap);
1889 return elfcore_write_note (abfd, buf, bufsiz,
1890 "CORE", note_type, data, sizeof (data));
1891 }
1892 }
1893}
1894
1895/* Return address for Ith PLT stub in section PLT, for relocation REL
1896 or (bfd_vma) -1 if it should not be included. */
1897
1898static bfd_vma
1899ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1900 const asection *plt ATTRIBUTE_UNUSED,
1901 const arelent *rel)
1902{
1903 return rel->address;
1904}
1905
1906/* Handle a PowerPC specific section when reading an object file. This
1907 is called when bfd_section_from_shdr finds a section with an unknown
1908 type. */
1909
1910static bfd_boolean
1911ppc_elf_section_from_shdr (bfd *abfd,
1912 Elf_Internal_Shdr *hdr,
1913 const char *name,
1914 int shindex)
1915{
1916 asection *newsect;
1917 flagword flags;
1918
1919 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1920 return FALSE;
1921
1922 newsect = hdr->bfd_section;
1923 flags = bfd_get_section_flags (abfd, newsect);
1924 if (hdr->sh_flags & SHF_EXCLUDE)
1925 flags |= SEC_EXCLUDE;
1926
1927 if (hdr->sh_type == SHT_ORDERED)
1928 flags |= SEC_SORT_ENTRIES;
1929
1930 bfd_set_section_flags (abfd, newsect, flags);
1931 return TRUE;
1932}
1933
1934/* Set up any other section flags and such that may be necessary. */
1935
1936static bfd_boolean
1937ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1938 Elf_Internal_Shdr *shdr,
1939 asection *asect)
1940{
1941 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1942 shdr->sh_flags |= SHF_EXCLUDE;
1943
1944 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1945 shdr->sh_type = SHT_ORDERED;
1946
1947 return TRUE;
1948}
1949
1950/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1951 need to bump up the number of section headers. */
1952
1953static int
1954ppc_elf_additional_program_headers (bfd *abfd,
1955 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1956{
1957 asection *s;
1958 int ret = 0;
1959
1960 s = bfd_get_section_by_name (abfd, ".sbss2");
1961 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1962 ++ret;
1963
1964 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1965 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1966 ++ret;
1967
1968 return ret;
1969}
1970
1971/* Add extra PPC sections -- Note, for now, make .sbss2 and
1972 .PPC.EMB.sbss0 a normal section, and not a bss section so
1973 that the linker doesn't crater when trying to make more than
1974 2 sections. */
1975
1976static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1977{
1978 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1979 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1982 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1983 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1985 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1986 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1987 { NULL, 0, 0, 0, 0 }
1988};
1989
1990/* This is what we want for new plt/got. */
1991static struct bfd_elf_special_section ppc_alt_plt =
1992 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1993
1994static const struct bfd_elf_special_section *
1995ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1996{
1997 const struct bfd_elf_special_section *ssect;
1998
1999 /* See if this is one of the special sections. */
2000 if (sec->name == NULL)
2001 return NULL;
2002
2003 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2004 sec->use_rela_p);
2005 if (ssect != NULL)
2006 {
2007 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2008 ssect = &ppc_alt_plt;
2009 return ssect;
2010 }
2011
2012 return _bfd_elf_get_sec_type_attr (abfd, sec);
2013}
2014\f
2015/* Very simple linked list structure for recording apuinfo values. */
2016typedef struct apuinfo_list
2017{
2018 struct apuinfo_list *next;
2019 unsigned long value;
2020}
2021apuinfo_list;
2022
2023static apuinfo_list *head;
2024
2025
2026static void
2027apuinfo_list_init (void)
2028{
2029 head = NULL;
2030}
2031
2032static void
2033apuinfo_list_add (unsigned long value)
2034{
2035 apuinfo_list *entry = head;
2036
2037 while (entry != NULL)
2038 {
2039 if (entry->value == value)
2040 return;
2041 entry = entry->next;
2042 }
2043
2044 entry = bfd_malloc (sizeof (* entry));
2045 if (entry == NULL)
2046 return;
2047
2048 entry->value = value;
2049 entry->next = head;
2050 head = entry;
2051}
2052
2053static unsigned
2054apuinfo_list_length (void)
2055{
2056 apuinfo_list *entry;
2057 unsigned long count;
2058
2059 for (entry = head, count = 0;
2060 entry;
2061 entry = entry->next)
2062 ++ count;
2063
2064 return count;
2065}
2066
2067static inline unsigned long
2068apuinfo_list_element (unsigned long number)
2069{
2070 apuinfo_list * entry;
2071
2072 for (entry = head;
2073 entry && number --;
2074 entry = entry->next)
2075 ;
2076
2077 return entry ? entry->value : 0;
2078}
2079
2080static void
2081apuinfo_list_finish (void)
2082{
2083 apuinfo_list *entry;
2084
2085 for (entry = head; entry;)
2086 {
2087 apuinfo_list *next = entry->next;
2088 free (entry);
2089 entry = next;
2090 }
2091
2092 head = NULL;
2093}
2094
2095#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2096#define APUINFO_LABEL "APUinfo"
2097
2098/* Scan the input BFDs and create a linked list of
2099 the APUinfo values that will need to be emitted. */
2100
2101static void
2102ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2103{
2104 bfd *ibfd;
2105 asection *asec;
2106 char *buffer;
2107 unsigned num_input_sections;
2108 bfd_size_type output_section_size;
2109 unsigned i;
2110 unsigned num_entries;
2111 unsigned long offset;
2112 unsigned long length;
2113 const char *error_message = NULL;
2114
2115 if (link_info == NULL)
2116 return;
2117
2118 /* Scan the input bfds, looking for apuinfo sections. */
2119 num_input_sections = 0;
2120 output_section_size = 0;
2121
2122 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2123 {
2124 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2125 if (asec)
2126 {
2127 ++ num_input_sections;
2128 output_section_size += asec->size;
2129 }
2130 }
2131
2132 /* We need at least one input sections
2133 in order to make merging worthwhile. */
2134 if (num_input_sections < 1)
2135 return;
2136
2137 /* Just make sure that the output section exists as well. */
2138 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2139 if (asec == NULL)
2140 return;
2141
2142 /* Allocate a buffer for the contents of the input sections. */
2143 buffer = bfd_malloc (output_section_size);
2144 if (buffer == NULL)
2145 return;
2146
2147 offset = 0;
2148 apuinfo_list_init ();
2149
2150 /* Read in the input sections contents. */
2151 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2152 {
2153 unsigned long datum;
2154 char *ptr;
2155
2156 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2157 if (asec == NULL)
2158 continue;
2159
2160 length = asec->size;
2161 if (length < 24)
2162 {
2163 error_message = _("corrupt or empty %s section in %B");
2164 goto fail;
2165 }
2166
2167 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2168 || (bfd_bread (buffer + offset, length, ibfd) != length))
2169 {
2170 error_message = _("unable to read in %s section from %B");
2171 goto fail;
2172 }
2173
2174 /* Process the contents of the section. */
2175 ptr = buffer + offset;
2176 error_message = _("corrupt %s section in %B");
2177
2178 /* Verify the contents of the header. Note - we have to
2179 extract the values this way in order to allow for a
2180 host whose endian-ness is different from the target. */
2181 datum = bfd_get_32 (ibfd, ptr);
2182 if (datum != sizeof APUINFO_LABEL)
2183 goto fail;
2184
2185 datum = bfd_get_32 (ibfd, ptr + 8);
2186 if (datum != 0x2)
2187 goto fail;
2188
2189 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2190 goto fail;
2191
2192 /* Get the number of bytes used for apuinfo entries. */
2193 datum = bfd_get_32 (ibfd, ptr + 4);
2194 if (datum + 20 != length)
2195 goto fail;
2196
2197 /* Make sure that we do not run off the end of the section. */
2198 if (offset + length > output_section_size)
2199 goto fail;
2200
2201 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2202 for (i = 0; i < datum; i += 4)
2203 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2204
2205 /* Update the offset. */
2206 offset += length;
2207 }
2208
2209 error_message = NULL;
2210
2211 /* Compute the size of the output section. */
2212 num_entries = apuinfo_list_length ();
2213 output_section_size = 20 + num_entries * 4;
2214
2215 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2216
2217 if (! bfd_set_section_size (abfd, asec, output_section_size))
2218 ibfd = abfd,
2219 error_message = _("warning: unable to set size of %s section in %B");
2220
2221 fail:
2222 free (buffer);
2223
2224 if (error_message)
2225 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2226}
2227
2228/* Prevent the output section from accumulating the input sections'
2229 contents. We have already stored this in our linked list structure. */
2230
2231static bfd_boolean
2232ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2233 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2234 asection *asec,
2235 bfd_byte *contents ATTRIBUTE_UNUSED)
2236{
2237 return (apuinfo_list_length ()
2238 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2239}
2240
2241/* Finally we can generate the output section. */
2242
2243static void
2244ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2245{
2246 bfd_byte *buffer;
2247 asection *asec;
2248 unsigned i;
2249 unsigned num_entries;
2250 bfd_size_type length;
2251
2252 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2253 if (asec == NULL)
2254 return;
2255
2256 if (apuinfo_list_length () == 0)
2257 return;
2258
2259 length = asec->size;
2260 if (length < 20)
2261 return;
2262
2263 buffer = bfd_malloc (length);
2264 if (buffer == NULL)
2265 {
2266 (*_bfd_error_handler)
2267 (_("failed to allocate space for new APUinfo section."));
2268 return;
2269 }
2270
2271 /* Create the apuinfo header. */
2272 num_entries = apuinfo_list_length ();
2273 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2274 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2275 bfd_put_32 (abfd, 0x2, buffer + 8);
2276 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2277
2278 length = 20;
2279 for (i = 0; i < num_entries; i++)
2280 {
2281 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2282 length += 4;
2283 }
2284
2285 if (length != asec->size)
2286 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2287
2288 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2289 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2290
2291 free (buffer);
2292
2293 apuinfo_list_finish ();
2294}
2295\f
2296/* The following functions are specific to the ELF linker, while
2297 functions above are used generally. They appear in this file more
2298 or less in the order in which they are called. eg.
2299 ppc_elf_check_relocs is called early in the link process,
2300 ppc_elf_finish_dynamic_sections is one of the last functions
2301 called. */
2302
2303/* The PPC linker needs to keep track of the number of relocs that it
2304 decides to copy as dynamic relocs in check_relocs for each symbol.
2305 This is so that it can later discard them if they are found to be
2306 unnecessary. We store the information in a field extending the
2307 regular ELF linker hash table. */
2308
2309struct ppc_elf_dyn_relocs
2310{
2311 struct ppc_elf_dyn_relocs *next;
2312
2313 /* The input section of the reloc. */
2314 asection *sec;
2315
2316 /* Total number of relocs copied for the input section. */
2317 bfd_size_type count;
2318
2319 /* Number of pc-relative relocs copied for the input section. */
2320 bfd_size_type pc_count;
2321};
2322
2323/* Track PLT entries needed for a given symbol. We might need more
2324 than one glink entry per symbol. */
2325struct plt_entry
2326{
2327 struct plt_entry *next;
2328
2329 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2330 This field stores the offset into .got2 used to initialise the
2331 GOT pointer reg. It will always be at least 32768 (and for
2332 current gcc this is the only offset used). */
2333 bfd_vma addend;
2334
2335 /* The .got2 section. */
2336 asection *sec;
2337
2338 /* PLT refcount or offset. */
2339 union
2340 {
2341 bfd_signed_vma refcount;
2342 bfd_vma offset;
2343 } plt;
2344
2345 /* .glink stub offset. */
2346 bfd_vma glink_offset;
2347};
2348
2349/* Of those relocs that might be copied as dynamic relocs, this macro
2350 selects those that must be copied when linking a shared library,
2351 even when the symbol is local. */
2352
2353#define MUST_BE_DYN_RELOC(RTYPE) \
2354 ((RTYPE) != R_PPC_REL24 \
2355 && (RTYPE) != R_PPC_REL14 \
2356 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2357 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2358 && (RTYPE) != R_PPC_REL32)
2359
2360/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2361 copying dynamic variables from a shared lib into an app's dynbss
2362 section, and instead use a dynamic relocation to point into the
2363 shared lib. */
2364#define ELIMINATE_COPY_RELOCS 1
2365
2366/* PPC ELF linker hash entry. */
2367
2368struct ppc_elf_link_hash_entry
2369{
2370 struct elf_link_hash_entry elf;
2371
2372 /* If this symbol is used in the linker created sections, the processor
2373 specific backend uses this field to map the field into the offset
2374 from the beginning of the section. */
2375 elf_linker_section_pointers_t *linker_section_pointer;
2376
2377 /* Track dynamic relocs copied for this symbol. */
2378 struct ppc_elf_dyn_relocs *dyn_relocs;
2379
2380 /* Contexts in which symbol is used in the GOT (or TOC).
2381 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2382 corresponding relocs are encountered during check_relocs.
2383 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2384 indicate the corresponding GOT entry type is not needed. */
2385#define TLS_GD 1 /* GD reloc. */
2386#define TLS_LD 2 /* LD reloc. */
2387#define TLS_TPREL 4 /* TPREL reloc, => IE. */
2388#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2389#define TLS_TLS 16 /* Any TLS reloc. */
2390#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2391 char tls_mask;
2392
2393 /* Nonzero if we have seen a small data relocation referring to this
2394 symbol. */
2395 unsigned char has_sda_refs;
2396};
2397
2398#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2399
2400/* PPC ELF linker hash table. */
2401
2402struct ppc_elf_link_hash_table
2403{
2404 struct elf_link_hash_table elf;
2405
2406 /* Short-cuts to get to dynamic linker sections. */
2407 asection *got;
2408 asection *relgot;
2409 asection *glink;
2410 asection *plt;
2411 asection *relplt;
2412 asection *dynbss;
2413 asection *relbss;
2414 asection *dynsbss;
2415 asection *relsbss;
2416 elf_linker_section_t sdata[2];
2417 asection *sbss;
2418
2419 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2420 asection *srelplt2;
2421
2422 /* The .got.plt section (VxWorks only)*/
2423 asection *sgotplt;
2424
2425 /* Shortcut to .__tls_get_addr. */
2426 struct elf_link_hash_entry *tls_get_addr;
2427
2428 /* The bfd that forced an old-style PLT. */
2429 bfd *old_bfd;
2430
2431 /* TLS local dynamic got entry handling. */
2432 union {
2433 bfd_signed_vma refcount;
2434 bfd_vma offset;
2435 } tlsld_got;
2436
2437 /* Offset of PltResolve function in glink. */
2438 bfd_vma glink_pltresolve;
2439
2440 /* Size of reserved GOT entries. */
2441 unsigned int got_header_size;
2442 /* Non-zero if allocating the header left a gap. */
2443 unsigned int got_gap;
2444
2445 /* The type of PLT we have chosen to use. */
2446 enum ppc_elf_plt_type plt_type;
2447
2448 /* Set if we should emit symbols for stubs. */
2449 unsigned int emit_stub_syms:1;
2450
2451 /* True if the target system is VxWorks. */
2452 unsigned int is_vxworks:1;
2453
2454 /* The size of PLT entries. */
2455 int plt_entry_size;
2456 /* The distance between adjacent PLT slots. */
2457 int plt_slot_size;
2458 /* The size of the first PLT entry. */
2459 int plt_initial_entry_size;
2460
2461 /* Small local sym to section mapping cache. */
2462 struct sym_sec_cache sym_sec;
2463};
2464
2465/* Get the PPC ELF linker hash table from a link_info structure. */
2466
2467#define ppc_elf_hash_table(p) \
2468 ((struct ppc_elf_link_hash_table *) (p)->hash)
2469
2470/* Create an entry in a PPC ELF linker hash table. */
2471
2472static struct bfd_hash_entry *
2473ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2474 struct bfd_hash_table *table,
2475 const char *string)
2476{
2477 /* Allocate the structure if it has not already been allocated by a
2478 subclass. */
2479 if (entry == NULL)
2480 {
2481 entry = bfd_hash_allocate (table,
2482 sizeof (struct ppc_elf_link_hash_entry));
2483 if (entry == NULL)
2484 return entry;
2485 }
2486
2487 /* Call the allocation method of the superclass. */
2488 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2489 if (entry != NULL)
2490 {
2491 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2492 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2493 ppc_elf_hash_entry (entry)->tls_mask = 0;
2494 }
2495
2496 return entry;
2497}
2498
2499/* Create a PPC ELF linker hash table. */
2500
2501static struct bfd_link_hash_table *
2502ppc_elf_link_hash_table_create (bfd *abfd)
2503{
2504 struct ppc_elf_link_hash_table *ret;
2505
2506 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2507 if (ret == NULL)
2508 return NULL;
2509
2510 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2511 ppc_elf_link_hash_newfunc,
2512 sizeof (struct ppc_elf_link_hash_entry)))
2513 {
2514 free (ret);
2515 return NULL;
2516 }
2517
2518 ret->elf.init_plt_refcount.refcount = 0;
2519 ret->elf.init_plt_refcount.glist = NULL;
2520 ret->elf.init_plt_offset.offset = 0;
2521 ret->elf.init_plt_offset.glist = NULL;
2522
2523 ret->sdata[0].name = ".sdata";
2524 ret->sdata[0].sym_name = "_SDA_BASE_";
2525 ret->sdata[0].bss_name = ".sbss";
2526
2527 ret->sdata[1].name = ".sdata2";
2528 ret->sdata[1].sym_name = "_SDA2_BASE_";
2529 ret->sdata[1].bss_name = ".sbss2";
2530
2531 ret->plt_entry_size = 12;
2532 ret->plt_slot_size = 8;
2533 ret->plt_initial_entry_size = 72;
2534
2535 return &ret->elf.root;
2536}
2537
2538/* Create .got and the related sections. */
2539
2540static bfd_boolean
2541ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2542{
2543 struct ppc_elf_link_hash_table *htab;
2544 asection *s;
2545 flagword flags;
2546
2547 if (!_bfd_elf_create_got_section (abfd, info))
2548 return FALSE;
2549
2550 htab = ppc_elf_hash_table (info);
2551 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2552 if (s == NULL)
2553 abort ();
2554
2555 if (htab->is_vxworks)
2556 {
2557 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2558 if (!htab->sgotplt)
2559 abort ();
2560 }
2561 else
2562 {
2563 /* The powerpc .got has a blrl instruction in it. Mark it
2564 executable. */
2565 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2567 if (!bfd_set_section_flags (abfd, s, flags))
2568 return FALSE;
2569 }
2570
2571 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2572 | SEC_LINKER_CREATED | SEC_READONLY);
2573 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2574 if (!htab->relgot
2575 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2576 return FALSE;
2577
2578 return TRUE;
2579}
2580
2581/* We have to create .dynsbss and .rela.sbss here so that they get mapped
2582 to output sections (just like _bfd_elf_create_dynamic_sections has
2583 to create .dynbss and .rela.bss). */
2584
2585static bfd_boolean
2586ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2587{
2588 struct ppc_elf_link_hash_table *htab;
2589 asection *s;
2590 flagword flags;
2591
2592 htab = ppc_elf_hash_table (info);
2593
2594 if (htab->got == NULL
2595 && !ppc_elf_create_got (abfd, info))
2596 return FALSE;
2597
2598 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2599 return FALSE;
2600
2601 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2602 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2603
2604 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2605 htab->glink = s;
2606 if (s == NULL
2607 || !bfd_set_section_alignment (abfd, s, 4))
2608 return FALSE;
2609
2610 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2611 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2612 SEC_ALLOC | SEC_LINKER_CREATED);
2613 htab->dynsbss = s;
2614 if (s == NULL)
2615 return FALSE;
2616
2617 if (! info->shared)
2618 {
2619 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2620 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2621 htab->relsbss = s;
2622 if (s == NULL
2623 || ! bfd_set_section_alignment (abfd, s, 2))
2624 return FALSE;
2625 }
2626
2627 if (htab->is_vxworks
2628 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2629 return FALSE;
2630
2631 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2632 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2633 if (s == NULL)
2634 abort ();
2635
2636 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2637 if (htab->plt_type == PLT_VXWORKS)
2638 /* The VxWorks PLT is a loaded section with contents. */
2639 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2640 return bfd_set_section_flags (abfd, s, flags);
2641}
2642
2643/* Copy the extra info we tack onto an elf_link_hash_entry. */
2644
2645static void
2646ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2647 struct elf_link_hash_entry *dir,
2648 struct elf_link_hash_entry *ind)
2649{
2650 struct ppc_elf_link_hash_entry *edir, *eind;
2651
2652 edir = (struct ppc_elf_link_hash_entry *) dir;
2653 eind = (struct ppc_elf_link_hash_entry *) ind;
2654
2655 if (eind->dyn_relocs != NULL)
2656 {
2657 if (edir->dyn_relocs != NULL)
2658 {
2659 struct ppc_elf_dyn_relocs **pp;
2660 struct ppc_elf_dyn_relocs *p;
2661
2662 /* Add reloc counts against the indirect sym to the direct sym
2663 list. Merge any entries against the same section. */
2664 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2665 {
2666 struct ppc_elf_dyn_relocs *q;
2667
2668 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2669 if (q->sec == p->sec)
2670 {
2671 q->pc_count += p->pc_count;
2672 q->count += p->count;
2673 *pp = p->next;
2674 break;
2675 }
2676 if (q == NULL)
2677 pp = &p->next;
2678 }
2679 *pp = edir->dyn_relocs;
2680 }
2681
2682 edir->dyn_relocs = eind->dyn_relocs;
2683 eind->dyn_relocs = NULL;
2684 }
2685
2686 edir->tls_mask |= eind->tls_mask;
2687 edir->has_sda_refs |= eind->has_sda_refs;
2688
2689 /* If called to transfer flags for a weakdef during processing
2690 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2691 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2692 if (!(ELIMINATE_COPY_RELOCS
2693 && eind->elf.root.type != bfd_link_hash_indirect
2694 && edir->elf.dynamic_adjusted))
2695 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2696
2697 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2698 edir->elf.ref_regular |= eind->elf.ref_regular;
2699 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2700 edir->elf.needs_plt |= eind->elf.needs_plt;
2701
2702 /* If we were called to copy over info for a weak sym, that's all. */
2703 if (eind->elf.root.type != bfd_link_hash_indirect)
2704 return;
2705
2706 /* Copy over the GOT refcount entries that we may have already seen to
2707 the symbol which just became indirect. */
2708 edir->elf.got.refcount += eind->elf.got.refcount;
2709 eind->elf.got.refcount = 0;
2710
2711 /* And plt entries. */
2712 if (eind->elf.plt.plist != NULL)
2713 {
2714 if (edir->elf.plt.plist != NULL)
2715 {
2716 struct plt_entry **entp;
2717 struct plt_entry *ent;
2718
2719 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2720 {
2721 struct plt_entry *dent;
2722
2723 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2724 if (dent->sec == ent->sec && dent->addend == ent->addend)
2725 {
2726 dent->plt.refcount += ent->plt.refcount;
2727 *entp = ent->next;
2728 break;
2729 }
2730 if (dent == NULL)
2731 entp = &ent->next;
2732 }
2733 *entp = edir->elf.plt.plist;
2734 }
2735
2736 edir->elf.plt.plist = eind->elf.plt.plist;
2737 eind->elf.plt.plist = NULL;
2738 }
2739
2740 if (eind->elf.dynindx != -1)
2741 {
2742 if (edir->elf.dynindx != -1)
2743 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2744 edir->elf.dynstr_index);
2745 edir->elf.dynindx = eind->elf.dynindx;
2746 edir->elf.dynstr_index = eind->elf.dynstr_index;
2747 eind->elf.dynindx = -1;
2748 eind->elf.dynstr_index = 0;
2749 }
2750}
2751
2752/* Return 1 if target is one of ours. */
2753
2754static bfd_boolean
2755is_ppc_elf_target (const struct bfd_target *targ)
2756{
2757 extern const bfd_target bfd_elf32_powerpc_vec;
2758 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2759 extern const bfd_target bfd_elf32_powerpcle_vec;
2760
2761 return (targ == &bfd_elf32_powerpc_vec
2762 || targ == &bfd_elf32_powerpc_vxworks_vec
2763 || targ == &bfd_elf32_powerpcle_vec);
2764}
2765
2766/* Hook called by the linker routine which adds symbols from an object
2767 file. We use it to put .comm items in .sbss, and not .bss. */
2768
2769static bfd_boolean
2770ppc_elf_add_symbol_hook (bfd *abfd,
2771 struct bfd_link_info *info,
2772 Elf_Internal_Sym *sym,
2773 const char **namep ATTRIBUTE_UNUSED,
2774 flagword *flagsp ATTRIBUTE_UNUSED,
2775 asection **secp,
2776 bfd_vma *valp)
2777{
2778 if (sym->st_shndx == SHN_COMMON
2779 && !info->relocatable
2780 && sym->st_size <= elf_gp_size (abfd)
2781 && is_ppc_elf_target (info->hash->creator))
2782 {
2783 /* Common symbols less than or equal to -G nn bytes are automatically
2784 put into .sbss. */
2785 struct ppc_elf_link_hash_table *htab;
2786
2787 htab = ppc_elf_hash_table (info);
2788 if (htab->sbss == NULL)
2789 {
2790 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2791
2792 if (!htab->elf.dynobj)
2793 htab->elf.dynobj = abfd;
2794
2795 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2796 ".sbss",
2797 flags);
2798 if (htab->sbss == NULL)
2799 return FALSE;
2800 }
2801
2802 *secp = htab->sbss;
2803 *valp = sym->st_size;
2804 }
2805
2806 return TRUE;
2807}
2808\f
2809static bfd_boolean
2810create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2811 elf_linker_section_t *lsect)
2812{
2813 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2814 TRUE, FALSE, TRUE);
2815 if (lsect->sym == NULL)
2816 return FALSE;
2817 if (lsect->sym->root.type == bfd_link_hash_new)
2818 lsect->sym->non_elf = 0;
2819 lsect->sym->ref_regular = 1;
2820 return TRUE;
2821}
2822
2823/* Create a special linker section. */
2824
2825static bfd_boolean
2826ppc_elf_create_linker_section (bfd *abfd,
2827 struct bfd_link_info *info,
2828 flagword flags,
2829 elf_linker_section_t *lsect)
2830{
2831 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2832 asection *s;
2833
2834 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2835 | SEC_LINKER_CREATED);
2836
2837 /* Record the first bfd that needs the special sections. */
2838 if (!htab->elf.dynobj)
2839 htab->elf.dynobj = abfd;
2840
2841 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2842 lsect->name,
2843 flags);
2844 if (s == NULL
2845 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2846 return FALSE;
2847 lsect->section = s;
2848
2849 return create_sdata_sym (htab, lsect);
2850}
2851
2852/* Find a linker generated pointer with a given addend and type. */
2853
2854static elf_linker_section_pointers_t *
2855elf_find_pointer_linker_section
2856 (elf_linker_section_pointers_t *linker_pointers,
2857 bfd_vma addend,
2858 elf_linker_section_t *lsect)
2859{
2860 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2861 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2862 return linker_pointers;
2863
2864 return NULL;
2865}
2866
2867/* Allocate a pointer to live in a linker created section. */
2868
2869static bfd_boolean
2870elf_create_pointer_linker_section (bfd *abfd,
2871 elf_linker_section_t *lsect,
2872 struct elf_link_hash_entry *h,
2873 const Elf_Internal_Rela *rel)
2874{
2875 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2876 elf_linker_section_pointers_t *linker_section_ptr;
2877 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2878 bfd_size_type amt;
2879
2880 BFD_ASSERT (lsect != NULL);
2881
2882 /* Is this a global symbol? */
2883 if (h != NULL)
2884 {
2885 struct ppc_elf_link_hash_entry *eh;
2886
2887 /* Has this symbol already been allocated? If so, our work is done. */
2888 eh = (struct ppc_elf_link_hash_entry *) h;
2889 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2890 rel->r_addend,
2891 lsect))
2892 return TRUE;
2893
2894 ptr_linker_section_ptr = &eh->linker_section_pointer;
2895 }
2896 else
2897 {
2898 /* Allocation of a pointer to a local symbol. */
2899 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2900
2901 /* Allocate a table to hold the local symbols if first time. */
2902 if (!ptr)
2903 {
2904 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2905
2906 amt = num_symbols;
2907 amt *= sizeof (elf_linker_section_pointers_t *);
2908 ptr = bfd_zalloc (abfd, amt);
2909
2910 if (!ptr)
2911 return FALSE;
2912
2913 elf_local_ptr_offsets (abfd) = ptr;
2914 }
2915
2916 /* Has this symbol already been allocated? If so, our work is done. */
2917 if (elf_find_pointer_linker_section (ptr[r_symndx],
2918 rel->r_addend,
2919 lsect))
2920 return TRUE;
2921
2922 ptr_linker_section_ptr = &ptr[r_symndx];
2923 }
2924
2925 /* Allocate space for a pointer in the linker section, and allocate
2926 a new pointer record from internal memory. */
2927 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2928 amt = sizeof (elf_linker_section_pointers_t);
2929 linker_section_ptr = bfd_alloc (abfd, amt);
2930
2931 if (!linker_section_ptr)
2932 return FALSE;
2933
2934 linker_section_ptr->next = *ptr_linker_section_ptr;
2935 linker_section_ptr->addend = rel->r_addend;
2936 linker_section_ptr->lsect = lsect;
2937 *ptr_linker_section_ptr = linker_section_ptr;
2938
2939 linker_section_ptr->offset = lsect->section->size;
2940 lsect->section->size += 4;
2941
2942#ifdef DEBUG
2943 fprintf (stderr,
2944 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2945 lsect->name, (long) linker_section_ptr->offset,
2946 (long) lsect->section->size);
2947#endif
2948
2949 return TRUE;
2950}
2951
2952static bfd_boolean
2953update_local_sym_info (bfd *abfd,
2954 Elf_Internal_Shdr *symtab_hdr,
2955 unsigned long r_symndx,
2956 int tls_type)
2957{
2958 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2959 char *local_got_tls_masks;
2960
2961 if (local_got_refcounts == NULL)
2962 {
2963 bfd_size_type size = symtab_hdr->sh_info;
2964
2965 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2966 local_got_refcounts = bfd_zalloc (abfd, size);
2967 if (local_got_refcounts == NULL)
2968 return FALSE;
2969 elf_local_got_refcounts (abfd) = local_got_refcounts;
2970 }
2971
2972 local_got_refcounts[r_symndx] += 1;
2973 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2974 local_got_tls_masks[r_symndx] |= tls_type;
2975 return TRUE;
2976}
2977
2978static bfd_boolean
2979update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2980 asection *sec, bfd_vma addend)
2981{
2982 struct plt_entry *ent;
2983
2984 if (addend < 32768)
2985 sec = NULL;
2986 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2987 if (ent->sec == sec && ent->addend == addend)
2988 break;
2989 if (ent == NULL)
2990 {
2991 bfd_size_type amt = sizeof (*ent);
2992 ent = bfd_alloc (abfd, amt);
2993 if (ent == NULL)
2994 return FALSE;
2995 ent->next = h->plt.plist;
2996 ent->sec = sec;
2997 ent->addend = addend;
2998 ent->plt.refcount = 0;
2999 h->plt.plist = ent;
3000 }
3001 ent->plt.refcount += 1;
3002 return TRUE;
3003}
3004
3005static struct plt_entry *
3006find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3007{
3008 struct plt_entry *ent;
3009
3010 if (addend < 32768)
3011 sec = NULL;
3012 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3013 if (ent->sec == sec && ent->addend == addend)
3014 break;
3015 return ent;
3016}
3017
3018static void
3019bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3020{
3021 (*_bfd_error_handler)
3022 (_("%B: relocation %s cannot be used when making a shared object"),
3023 abfd,
3024 ppc_elf_howto_table[r_type]->name);
3025 bfd_set_error (bfd_error_bad_value);
3026}
3027
3028/* Look through the relocs for a section during the first phase, and
3029 allocate space in the global offset table or procedure linkage
3030 table. */
3031
3032static bfd_boolean
3033ppc_elf_check_relocs (bfd *abfd,
3034 struct bfd_link_info *info,
3035 asection *sec,
3036 const Elf_Internal_Rela *relocs)
3037{
3038 struct ppc_elf_link_hash_table *htab;
3039 Elf_Internal_Shdr *symtab_hdr;
3040 struct elf_link_hash_entry **sym_hashes;
3041 const Elf_Internal_Rela *rel;
3042 const Elf_Internal_Rela *rel_end;
3043 asection *got2, *sreloc;
3044
3045 if (info->relocatable)
3046 return TRUE;
3047
3048 /* Don't do anything special with non-loaded, non-alloced sections.
3049 In particular, any relocs in such sections should not affect GOT
3050 and PLT reference counting (ie. we don't allow them to create GOT
3051 or PLT entries), there's no possibility or desire to optimize TLS
3052 relocs, and there's not much point in propagating relocs to shared
3053 libs that the dynamic linker won't relocate. */
3054 if ((sec->flags & SEC_ALLOC) == 0)
3055 return TRUE;
3056
3057#ifdef DEBUG
3058 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3059 sec, abfd);
3060#endif
3061
3062 /* Initialize howto table if not already done. */
3063 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3064 ppc_elf_howto_init ();
3065
3066 htab = ppc_elf_hash_table (info);
3067 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3068 sym_hashes = elf_sym_hashes (abfd);
3069 got2 = bfd_get_section_by_name (abfd, ".got2");
3070 sreloc = NULL;
3071
3072 rel_end = relocs + sec->reloc_count;
3073 for (rel = relocs; rel < rel_end; rel++)
3074 {
3075 unsigned long r_symndx;
3076 enum elf_ppc_reloc_type r_type;
3077 struct elf_link_hash_entry *h;
3078 int tls_type = 0;
3079
3080 r_symndx = ELF32_R_SYM (rel->r_info);
3081 if (r_symndx < symtab_hdr->sh_info)
3082 h = NULL;
3083 else
3084 {
3085 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3086 while (h->root.type == bfd_link_hash_indirect
3087 || h->root.type == bfd_link_hash_warning)
3088 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3089 }
3090
3091 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3092 This shows up in particular in an R_PPC_ADDR32 in the eabi
3093 startup code. */
3094 if (h != NULL
3095 && htab->got == NULL
3096 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3097 {
3098 if (htab->elf.dynobj == NULL)
3099 htab->elf.dynobj = abfd;
3100 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3101 return FALSE;
3102 BFD_ASSERT (h == htab->elf.hgot);
3103 }
3104
3105 r_type = ELF32_R_TYPE (rel->r_info);
3106 switch (r_type)
3107 {
3108 case R_PPC_GOT_TLSLD16:
3109 case R_PPC_GOT_TLSLD16_LO:
3110 case R_PPC_GOT_TLSLD16_HI:
3111 case R_PPC_GOT_TLSLD16_HA:
3112 htab->tlsld_got.refcount += 1;
3113 tls_type = TLS_TLS | TLS_LD;
3114 goto dogottls;
3115
3116 case R_PPC_GOT_TLSGD16:
3117 case R_PPC_GOT_TLSGD16_LO:
3118 case R_PPC_GOT_TLSGD16_HI:
3119 case R_PPC_GOT_TLSGD16_HA:
3120 tls_type = TLS_TLS | TLS_GD;
3121 goto dogottls;
3122
3123 case R_PPC_GOT_TPREL16:
3124 case R_PPC_GOT_TPREL16_LO:
3125 case R_PPC_GOT_TPREL16_HI:
3126 case R_PPC_GOT_TPREL16_HA:
3127 if (info->shared)
3128 info->flags |= DF_STATIC_TLS;
3129 tls_type = TLS_TLS | TLS_TPREL;
3130 goto dogottls;
3131
3132 case R_PPC_GOT_DTPREL16:
3133 case R_PPC_GOT_DTPREL16_LO:
3134 case R_PPC_GOT_DTPREL16_HI:
3135 case R_PPC_GOT_DTPREL16_HA:
3136 tls_type = TLS_TLS | TLS_DTPREL;
3137 dogottls:
3138 sec->has_tls_reloc = 1;
3139 /* Fall thru */
3140
3141 /* GOT16 relocations */
3142 case R_PPC_GOT16:
3143 case R_PPC_GOT16_LO:
3144 case R_PPC_GOT16_HI:
3145 case R_PPC_GOT16_HA:
3146 /* This symbol requires a global offset table entry. */
3147 if (htab->got == NULL)
3148 {
3149 if (htab->elf.dynobj == NULL)
3150 htab->elf.dynobj = abfd;
3151 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3152 return FALSE;
3153 }
3154 if (h != NULL)
3155 {
3156 h->got.refcount += 1;
3157 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3158 }
3159 else
3160 /* This is a global offset table entry for a local symbol. */
3161 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3162 return FALSE;
3163 break;
3164
3165 /* Indirect .sdata relocation. */
3166 case R_PPC_EMB_SDAI16:
3167 if (info->shared)
3168 {
3169 bad_shared_reloc (abfd, r_type);
3170 return FALSE;
3171 }
3172 if (htab->sdata[0].section == NULL
3173 && !ppc_elf_create_linker_section (abfd, info, 0,
3174 &htab->sdata[0]))
3175 return FALSE;
3176 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3177 h, rel))
3178 return FALSE;
3179 if (h != NULL)
3180 {
3181 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3182 h->non_got_ref = TRUE;
3183 }
3184 break;
3185
3186 /* Indirect .sdata2 relocation. */
3187 case R_PPC_EMB_SDA2I16:
3188 if (info->shared)
3189 {
3190 bad_shared_reloc (abfd, r_type);
3191 return FALSE;
3192 }
3193 if (htab->sdata[1].section == NULL
3194 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3195 &htab->sdata[1]))
3196 return FALSE;
3197 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3198 h, rel))
3199 return FALSE;
3200 if (h != NULL)
3201 {
3202 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3203 h->non_got_ref = TRUE;
3204 }
3205 break;
3206
3207 case R_PPC_SDAREL16:
3208 if (info->shared)
3209 {
3210 bad_shared_reloc (abfd, r_type);
3211 return FALSE;
3212 }
3213 if (htab->sdata[0].sym == NULL
3214 && !create_sdata_sym (htab, &htab->sdata[0]))
3215 return FALSE;
3216 if (h != NULL)
3217 {
3218 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3219 h->non_got_ref = TRUE;
3220 }
3221 break;
3222
3223 case R_PPC_EMB_SDA2REL:
3224 if (info->shared)
3225 {
3226 bad_shared_reloc (abfd, r_type);
3227 return FALSE;
3228 }
3229 if (htab->sdata[1].sym == NULL
3230 && !create_sdata_sym (htab, &htab->sdata[1]))
3231 return FALSE;
3232 if (h != NULL)
3233 {
3234 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3235 h->non_got_ref = TRUE;
3236 }
3237 break;
3238
3239 case R_PPC_EMB_SDA21:
3240 case R_PPC_EMB_RELSDA:
3241 if (info->shared)
3242 {
3243 bad_shared_reloc (abfd, r_type);
3244 return FALSE;
3245 }
3246 if (htab->sdata[0].sym == NULL
3247 && !create_sdata_sym (htab, &htab->sdata[0]))
3248 return FALSE;
3249 if (htab->sdata[1].sym == NULL
3250 && !create_sdata_sym (htab, &htab->sdata[1]))
3251 return FALSE;
3252 if (h != NULL)
3253 {
3254 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3255 h->non_got_ref = TRUE;
3256 }
3257 break;
3258
3259 case R_PPC_EMB_NADDR32:
3260 case R_PPC_EMB_NADDR16:
3261 case R_PPC_EMB_NADDR16_LO:
3262 case R_PPC_EMB_NADDR16_HI:
3263 case R_PPC_EMB_NADDR16_HA:
3264 if (info->shared)
3265 {
3266 bad_shared_reloc (abfd, r_type);
3267 return FALSE;
3268 }
3269 if (h != NULL)
3270 h->non_got_ref = TRUE;
3271 break;
3272
3273 case R_PPC_PLT32:
3274 case R_PPC_PLTREL24:
3275 case R_PPC_PLTREL32:
3276 case R_PPC_PLT16_LO:
3277 case R_PPC_PLT16_HI:
3278 case R_PPC_PLT16_HA:
3279#ifdef DEBUG
3280 fprintf (stderr, "Reloc requires a PLT entry\n");
3281#endif
3282 /* This symbol requires a procedure linkage table entry. We
3283 actually build the entry in finish_dynamic_symbol,
3284 because this might be a case of linking PIC code without
3285 linking in any dynamic objects, in which case we don't
3286 need to generate a procedure linkage table after all. */
3287
3288 if (h == NULL)
3289 {
3290 /* It does not make sense to have a procedure linkage
3291 table entry for a local symbol. */
3292 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3293 "local symbol"),
3294 abfd,
3295 sec,
3296 (long) rel->r_offset,
3297 ppc_elf_howto_table[r_type]->name);
3298 bfd_set_error (bfd_error_bad_value);
3299 return FALSE;
3300 }
3301 else
3302 {
3303 bfd_vma addend = 0;
3304
3305 if (r_type == R_PPC_PLTREL24)
3306 {
3307 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3308 addend = rel->r_addend;
3309 }
3310 h->needs_plt = 1;
3311 if (!update_plt_info (abfd, h, got2, addend))
3312 return FALSE;
3313 }
3314 break;
3315
3316 /* The following relocations don't need to propagate the
3317 relocation if linking a shared object since they are
3318 section relative. */
3319 case R_PPC_SECTOFF:
3320 case R_PPC_SECTOFF_LO:
3321 case R_PPC_SECTOFF_HI:
3322 case R_PPC_SECTOFF_HA:
3323 case R_PPC_DTPREL16:
3324 case R_PPC_DTPREL16_LO:
3325 case R_PPC_DTPREL16_HI:
3326 case R_PPC_DTPREL16_HA:
3327 case R_PPC_TOC16:
3328 break;
3329
3330 case R_PPC_REL16:
3331 case R_PPC_REL16_LO:
3332 case R_PPC_REL16_HI:
3333 case R_PPC_REL16_HA:
3334 ppc_elf_tdata (abfd)->has_rel16 = 1;
3335 break;
3336
3337 /* These are just markers. */
3338 case R_PPC_TLS:
3339 case R_PPC_EMB_MRKREF:
3340 case R_PPC_NONE:
3341 case R_PPC_max:
3342 break;
3343
3344 /* These should only appear in dynamic objects. */
3345 case R_PPC_COPY:
3346 case R_PPC_GLOB_DAT:
3347 case R_PPC_JMP_SLOT:
3348 case R_PPC_RELATIVE:
3349 break;
3350
3351 /* These aren't handled yet. We'll report an error later. */
3352 case R_PPC_ADDR30:
3353 case R_PPC_EMB_RELSEC16:
3354 case R_PPC_EMB_RELST_LO:
3355 case R_PPC_EMB_RELST_HI:
3356 case R_PPC_EMB_RELST_HA:
3357 case R_PPC_EMB_BIT_FLD:
3358 break;
3359
3360 /* This refers only to functions defined in the shared library. */
3361 case R_PPC_LOCAL24PC:
3362 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3363 {
3364 htab->plt_type = PLT_OLD;
3365 htab->old_bfd = abfd;
3366 }
3367 break;
3368
3369 /* This relocation describes the C++ object vtable hierarchy.
3370 Reconstruct it for later use during GC. */
3371 case R_PPC_GNU_VTINHERIT:
3372 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3373 return FALSE;
3374 break;
3375
3376 /* This relocation describes which C++ vtable entries are actually
3377 used. Record for later use during GC. */
3378 case R_PPC_GNU_VTENTRY:
3379 BFD_ASSERT (h != NULL);
3380 if (h != NULL
3381 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3382 return FALSE;
3383 break;
3384
3385 /* We shouldn't really be seeing these. */
3386 case R_PPC_TPREL32:
3387 if (info->shared)
3388 info->flags |= DF_STATIC_TLS;
3389 goto dodyn;
3390
3391 /* Nor these. */
3392 case R_PPC_DTPMOD32:
3393 case R_PPC_DTPREL32:
3394 goto dodyn;
3395
3396 case R_PPC_TPREL16:
3397 case R_PPC_TPREL16_LO:
3398 case R_PPC_TPREL16_HI:
3399 case R_PPC_TPREL16_HA:
3400 if (info->shared)
3401 info->flags |= DF_STATIC_TLS;
3402 goto dodyn;
3403
3404 case R_PPC_REL32:
3405 if (h == NULL
3406 && got2 != NULL
3407 && (sec->flags & SEC_CODE) != 0
3408 && (info->shared || info->pie)
3409 && htab->plt_type == PLT_UNSET)
3410 {
3411 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3412 the start of a function, which assembles to a REL32
3413 reference to .got2. If we detect one of these, then
3414 force the old PLT layout because the linker cannot
3415 reliably deduce the GOT pointer value needed for
3416 PLT call stubs. */
3417 asection *s;
3418
3419 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3420 r_symndx);
3421 if (s == got2)
3422 {
3423 htab->plt_type = PLT_OLD;
3424 htab->old_bfd = abfd;
3425 }
3426 }
3427 if (h == NULL || h == htab->elf.hgot)
3428 break;
3429 goto dodyn1;
3430
3431 case R_PPC_REL24:
3432 case R_PPC_REL14:
3433 case R_PPC_REL14_BRTAKEN:
3434 case R_PPC_REL14_BRNTAKEN:
3435 if (h == NULL)
3436 break;
3437 if (h == htab->elf.hgot)
3438 {
3439 if (htab->plt_type == PLT_UNSET)
3440 {
3441 htab->plt_type = PLT_OLD;
3442 htab->old_bfd = abfd;
3443 }
3444 break;
3445 }
3446 /* fall through */
3447
3448 case R_PPC_ADDR32:
3449 case R_PPC_ADDR24:
3450 case R_PPC_ADDR16:
3451 case R_PPC_ADDR16_LO:
3452 case R_PPC_ADDR16_HI:
3453 case R_PPC_ADDR16_HA:
3454 case R_PPC_ADDR14:
3455 case R_PPC_ADDR14_BRTAKEN:
3456 case R_PPC_ADDR14_BRNTAKEN:
3457 case R_PPC_UADDR32:
3458 case R_PPC_UADDR16:
3459 dodyn1:
3460 if (h != NULL && !info->shared)
3461 {
3462 /* We may need a plt entry if the symbol turns out to be
3463 a function defined in a dynamic object. */
3464 if (!update_plt_info (abfd, h, NULL, 0))
3465 return FALSE;
3466
3467 /* We may need a copy reloc too. */
3468 h->non_got_ref = 1;
3469 }
3470
3471 dodyn:
3472 /* If we are creating a shared library, and this is a reloc
3473 against a global symbol, or a non PC relative reloc
3474 against a local symbol, then we need to copy the reloc
3475 into the shared library. However, if we are linking with
3476 -Bsymbolic, we do not need to copy a reloc against a
3477 global symbol which is defined in an object we are
3478 including in the link (i.e., DEF_REGULAR is set). At
3479 this point we have not seen all the input files, so it is
3480 possible that DEF_REGULAR is not set now but will be set
3481 later (it is never cleared). In case of a weak definition,
3482 DEF_REGULAR may be cleared later by a strong definition in
3483 a shared library. We account for that possibility below by
3484 storing information in the dyn_relocs field of the hash
3485 table entry. A similar situation occurs when creating
3486 shared libraries and symbol visibility changes render the
3487 symbol local.
3488
3489 If on the other hand, we are creating an executable, we
3490 may need to keep relocations for symbols satisfied by a
3491 dynamic library if we manage to avoid copy relocs for the
3492 symbol. */
3493 if ((info->shared
3494 && (MUST_BE_DYN_RELOC (r_type)
3495 || (h != NULL
3496 && (! info->symbolic
3497 || h->root.type == bfd_link_hash_defweak
3498 || !h->def_regular))))
3499 || (ELIMINATE_COPY_RELOCS
3500 && !info->shared
3501 && h != NULL
3502 && (h->root.type == bfd_link_hash_defweak
3503 || !h->def_regular)))
3504 {
3505 struct ppc_elf_dyn_relocs *p;
3506 struct ppc_elf_dyn_relocs **head;
3507
3508#ifdef DEBUG
3509 fprintf (stderr,
3510 "ppc_elf_check_relocs needs to "
3511 "create relocation for %s\n",
3512 (h && h->root.root.string
3513 ? h->root.root.string : "<unknown>"));
3514#endif
3515 if (sreloc == NULL)
3516 {
3517 const char *name;
3518
3519 name = (bfd_elf_string_from_elf_section
3520 (abfd,
3521 elf_elfheader (abfd)->e_shstrndx,
3522 elf_section_data (sec)->rel_hdr.sh_name));
3523 if (name == NULL)
3524 return FALSE;
3525
3526 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3527 && strcmp (bfd_get_section_name (abfd, sec),
3528 name + 5) == 0);
3529
3530 if (htab->elf.dynobj == NULL)
3531 htab->elf.dynobj = abfd;
3532 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3533 if (sreloc == NULL)
3534 {
3535 flagword flags;
3536
3537 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3538 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3539 | SEC_ALLOC | SEC_LOAD);
3540 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3541 name,
3542 flags);
3543 if (sreloc == NULL
3544 || ! bfd_set_section_alignment (htab->elf.dynobj,
3545 sreloc, 2))
3546 return FALSE;
3547 }
3548 elf_section_data (sec)->sreloc = sreloc;
3549 }
3550
3551 /* If this is a global symbol, we count the number of
3552 relocations we need for this symbol. */
3553 if (h != NULL)
3554 {
3555 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3556 }
3557 else
3558 {
3559 /* Track dynamic relocs needed for local syms too.
3560 We really need local syms available to do this
3561 easily. Oh well. */
3562
3563 asection *s;
3564 void *vpp;
3565
3566 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3567 sec, r_symndx);
3568 if (s == NULL)
3569 return FALSE;
3570
3571 vpp = &elf_section_data (s)->local_dynrel;
3572 head = (struct ppc_elf_dyn_relocs **) vpp;
3573 }
3574
3575 p = *head;
3576 if (p == NULL || p->sec != sec)
3577 {
3578 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3579 if (p == NULL)
3580 return FALSE;
3581 p->next = *head;
3582 *head = p;
3583 p->sec = sec;
3584 p->count = 0;
3585 p->pc_count = 0;
3586 }
3587
3588 p->count += 1;
3589 if (!MUST_BE_DYN_RELOC (r_type))
3590 p->pc_count += 1;
3591 }
3592
3593 break;
3594 }
3595 }
3596
3597 return TRUE;
3598}
3599\f
3600
3601/* Merge object attributes from IBFD into OBFD. Raise an error if
3602 there are conflicting attributes. */
3603static bfd_boolean
3604ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3605{
3606 obj_attribute *in_attr, *in_attrs;
3607 obj_attribute *out_attr, *out_attrs;
3608
3609 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3610 {
3611 /* This is the first object. Copy the attributes. */
3612 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3613
3614 /* Use the Tag_null value to indicate the attributes have been
3615 initialized. */
3616 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3617
3618 return TRUE;
3619 }
3620
3621 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3622 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3623
3624 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3625 non-conflicting ones. */
3626 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3627 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3628 if (in_attr->i != out_attr->i)
3629 {
3630 out_attr->type = 1;
3631 if (out_attr->i == 0)
3632 out_attr->i = in_attr->i;
3633 else if (in_attr->i == 0)
3634 ;
3635 else if (out_attr->i == 1 && in_attr->i == 2)
3636 _bfd_error_handler
3637 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3638 else if (out_attr->i == 2 && in_attr->i == 1)
3639 _bfd_error_handler
3640 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3641 else if (in_attr->i > 2)
3642 _bfd_error_handler
3643 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3644 in_attr->i);
3645 else
3646 _bfd_error_handler
3647 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3648 out_attr->i);
3649 }
3650
3651 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3652 merge non-conflicting ones. */
3653 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3654 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3655 if (in_attr->i != out_attr->i)
3656 {
3657 const char *in_abi = NULL, *out_abi = NULL;
3658
3659 switch (in_attr->i)
3660 {
3661 case 1: in_abi = "generic"; break;
3662 case 2: in_abi = "AltiVec"; break;
3663 case 3: in_abi = "SPE"; break;
3664 }
3665
3666 switch (out_attr->i)
3667 {
3668 case 1: out_abi = "generic"; break;
3669 case 2: out_abi = "AltiVec"; break;
3670 case 3: out_abi = "SPE"; break;
3671 }
3672
3673 out_attr->type = 1;
3674 if (out_attr->i == 0)
3675 out_attr->i = in_attr->i;
3676 else if (in_attr->i == 0)
3677 ;
3678 /* For now, allow generic to transition to AltiVec or SPE
3679 without a warning. If GCC marked files with their stack
3680 alignment and used don't-care markings for files which are
3681 not affected by the vector ABI, we could warn about this
3682 case too. */
3683 else if (out_attr->i == 1)
3684 out_attr->i = in_attr->i;
3685 else if (in_attr->i == 1)
3686 ;
3687 else if (in_abi == NULL)
3688 _bfd_error_handler
3689 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3690 in_attr->i);
3691 else if (out_abi == NULL)
3692 _bfd_error_handler
3693 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3694 in_attr->i);
3695 else
3696 _bfd_error_handler
3697 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3698 ibfd, obfd, in_abi, out_abi);
3699 }
3700
3701 /* Merge Tag_compatibility attributes and any common GNU ones. */
3702 _bfd_elf_merge_object_attributes (ibfd, obfd);
3703
3704 return TRUE;
3705}
3706
3707/* Merge backend specific data from an object file to the output
3708 object file when linking. */
3709
3710static bfd_boolean
3711ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3712{
3713 flagword old_flags;
3714 flagword new_flags;
3715 bfd_boolean error;
3716
3717 if (!is_ppc_elf_target (ibfd->xvec)
3718 || !is_ppc_elf_target (obfd->xvec))
3719 return TRUE;
3720
3721 /* Check if we have the same endianess. */
3722 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3723 return FALSE;
3724
3725 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3726 return FALSE;
3727
3728 new_flags = elf_elfheader (ibfd)->e_flags;
3729 old_flags = elf_elfheader (obfd)->e_flags;
3730 if (!elf_flags_init (obfd))
3731 {
3732 /* First call, no flags set. */
3733 elf_flags_init (obfd) = TRUE;
3734 elf_elfheader (obfd)->e_flags = new_flags;
3735 }
3736
3737 /* Compatible flags are ok. */
3738 else if (new_flags == old_flags)
3739 ;
3740
3741 /* Incompatible flags. */
3742 else
3743 {
3744 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3745 to be linked with either. */
3746 error = FALSE;
3747 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3748 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3749 {
3750 error = TRUE;
3751 (*_bfd_error_handler)
3752 (_("%B: compiled with -mrelocatable and linked with "
3753 "modules compiled normally"), ibfd);
3754 }
3755 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3756 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3757 {
3758 error = TRUE;
3759 (*_bfd_error_handler)
3760 (_("%B: compiled normally and linked with "
3761 "modules compiled with -mrelocatable"), ibfd);
3762 }
3763
3764 /* The output is -mrelocatable-lib iff both the input files are. */
3765 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3766 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3767
3768 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3769 but each input file is either -mrelocatable or -mrelocatable-lib. */
3770 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3771 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3772 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3773 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3774
3775 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3776 any module uses it. */
3777 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3778
3779 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3780 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3781
3782 /* Warn about any other mismatches. */
3783 if (new_flags != old_flags)
3784 {
3785 error = TRUE;
3786 (*_bfd_error_handler)
3787 (_("%B: uses different e_flags (0x%lx) fields "
3788 "than previous modules (0x%lx)"),
3789 ibfd, (long) new_flags, (long) old_flags);
3790 }
3791
3792 if (error)
3793 {
3794 bfd_set_error (bfd_error_bad_value);
3795 return FALSE;
3796 }
3797 }
3798
3799 return TRUE;
3800}
3801\f
3802/* Choose which PLT scheme to use, and set .plt flags appropriately.
3803 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3804int
3805ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3806 struct bfd_link_info *info,
3807 enum ppc_elf_plt_type plt_style,
3808 int emit_stub_syms)
3809{
3810 struct ppc_elf_link_hash_table *htab;
3811 flagword flags;
3812
3813 htab = ppc_elf_hash_table (info);
3814
3815 if (htab->plt_type == PLT_UNSET)
3816 {
3817 if (plt_style == PLT_OLD)
3818 htab->plt_type = PLT_OLD;
3819 else
3820 {
3821 bfd *ibfd;
3822 enum ppc_elf_plt_type plt_type = plt_style;
3823
3824 /* Look through the reloc flags left by ppc_elf_check_relocs.
3825 Use the old style bss plt if a file makes plt calls
3826 without using the new relocs, and if ld isn't given
3827 --secure-plt and we never see REL16 relocs. */
3828 if (plt_type == PLT_UNSET)
3829 plt_type = PLT_OLD;
3830 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3831 if (is_ppc_elf_target (ibfd->xvec))
3832 {
3833 if (ppc_elf_tdata (ibfd)->has_rel16)
3834 plt_type = PLT_NEW;
3835 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3836 {
3837 plt_type = PLT_OLD;
3838 htab->old_bfd = ibfd;
3839 break;
3840 }
3841 }
3842 htab->plt_type = plt_type;
3843 }
3844 }
3845 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3846 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3847
3848 htab->emit_stub_syms = emit_stub_syms;
3849
3850 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3851
3852 if (htab->plt_type == PLT_NEW)
3853 {
3854 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3855 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3856
3857 /* The new PLT is a loaded section. */
3858 if (htab->plt != NULL
3859 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3860 return -1;
3861
3862 /* The new GOT is not executable. */
3863 if (htab->got != NULL
3864 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3865 return -1;
3866 }
3867 else
3868 {
3869 /* Stop an unused .glink section from affecting .text alignment. */
3870 if (htab->glink != NULL
3871 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3872 return -1;
3873 }
3874 return htab->plt_type == PLT_NEW;
3875}
3876\f
3877/* Return the section that should be marked against GC for a given
3878 relocation. */
3879
3880static asection *
3881ppc_elf_gc_mark_hook (asection *sec,
3882 struct bfd_link_info *info,
3883 Elf_Internal_Rela *rel,
3884 struct elf_link_hash_entry *h,
3885 Elf_Internal_Sym *sym)
3886{
3887 if (h != NULL)
3888 switch (ELF32_R_TYPE (rel->r_info))
3889 {
3890 case R_PPC_GNU_VTINHERIT:
3891 case R_PPC_GNU_VTENTRY:
3892 return NULL;
3893 }
3894
3895 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3896}
3897
3898/* Update the got, plt and dynamic reloc reference counts for the
3899 section being removed. */
3900
3901static bfd_boolean
3902ppc_elf_gc_sweep_hook (bfd *abfd,
3903 struct bfd_link_info *info,
3904 asection *sec,
3905 const Elf_Internal_Rela *relocs)
3906{
3907 struct ppc_elf_link_hash_table *htab;
3908 Elf_Internal_Shdr *symtab_hdr;
3909 struct elf_link_hash_entry **sym_hashes;
3910 bfd_signed_vma *local_got_refcounts;
3911 const Elf_Internal_Rela *rel, *relend;
3912 asection *got2;
3913
3914 if ((sec->flags & SEC_ALLOC) == 0)
3915 return TRUE;
3916
3917 elf_section_data (sec)->local_dynrel = NULL;
3918
3919 htab = ppc_elf_hash_table (info);
3920 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3921 sym_hashes = elf_sym_hashes (abfd);
3922 local_got_refcounts = elf_local_got_refcounts (abfd);
3923 got2 = bfd_get_section_by_name (abfd, ".got2");
3924
3925 relend = relocs + sec->reloc_count;
3926 for (rel = relocs; rel < relend; rel++)
3927 {
3928 unsigned long r_symndx;
3929 enum elf_ppc_reloc_type r_type;
3930 struct elf_link_hash_entry *h = NULL;
3931
3932 r_symndx = ELF32_R_SYM (rel->r_info);
3933 if (r_symndx >= symtab_hdr->sh_info)
3934 {
3935 struct ppc_elf_dyn_relocs **pp, *p;
3936 struct ppc_elf_link_hash_entry *eh;
3937
3938 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3939 while (h->root.type == bfd_link_hash_indirect
3940 || h->root.type == bfd_link_hash_warning)
3941 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3942 eh = (struct ppc_elf_link_hash_entry *) h;
3943
3944 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3945 if (p->sec == sec)
3946 {
3947 /* Everything must go for SEC. */
3948 *pp = p->next;
3949 break;
3950 }
3951 }
3952
3953 r_type = ELF32_R_TYPE (rel->r_info);
3954 switch (r_type)
3955 {
3956 case R_PPC_GOT_TLSLD16:
3957 case R_PPC_GOT_TLSLD16_LO:
3958 case R_PPC_GOT_TLSLD16_HI:
3959 case R_PPC_GOT_TLSLD16_HA:
3960 htab->tlsld_got.refcount -= 1;
3961 /* Fall thru */
3962
3963 case R_PPC_GOT_TLSGD16:
3964 case R_PPC_GOT_TLSGD16_LO:
3965 case R_PPC_GOT_TLSGD16_HI:
3966 case R_PPC_GOT_TLSGD16_HA:
3967 case R_PPC_GOT_TPREL16:
3968 case R_PPC_GOT_TPREL16_LO:
3969 case R_PPC_GOT_TPREL16_HI:
3970 case R_PPC_GOT_TPREL16_HA:
3971 case R_PPC_GOT_DTPREL16:
3972 case R_PPC_GOT_DTPREL16_LO:
3973 case R_PPC_GOT_DTPREL16_HI:
3974 case R_PPC_GOT_DTPREL16_HA:
3975 case R_PPC_GOT16:
3976 case R_PPC_GOT16_LO:
3977 case R_PPC_GOT16_HI:
3978 case R_PPC_GOT16_HA:
3979 if (h != NULL)
3980 {
3981 if (h->got.refcount > 0)
3982 h->got.refcount--;
3983 }
3984 else if (local_got_refcounts != NULL)
3985 {
3986 if (local_got_refcounts[r_symndx] > 0)
3987 local_got_refcounts[r_symndx]--;
3988 }
3989 break;
3990
3991 case R_PPC_REL24:
3992 case R_PPC_REL14:
3993 case R_PPC_REL14_BRTAKEN:
3994 case R_PPC_REL14_BRNTAKEN:
3995 case R_PPC_REL32:
3996 if (h == NULL || h == htab->elf.hgot)
3997 break;
3998 /* Fall thru */
3999
4000 case R_PPC_ADDR32:
4001 case R_PPC_ADDR24:
4002 case R_PPC_ADDR16:
4003 case R_PPC_ADDR16_LO:
4004 case R_PPC_ADDR16_HI:
4005 case R_PPC_ADDR16_HA:
4006 case R_PPC_ADDR14:
4007 case R_PPC_ADDR14_BRTAKEN:
4008 case R_PPC_ADDR14_BRNTAKEN:
4009 case R_PPC_UADDR32:
4010 case R_PPC_UADDR16:
4011 if (info->shared)
4012 break;
4013
4014 case R_PPC_PLT32:
4015 case R_PPC_PLTREL24:
4016 case R_PPC_PLTREL32:
4017 case R_PPC_PLT16_LO:
4018 case R_PPC_PLT16_HI:
4019 case R_PPC_PLT16_HA:
4020 if (h != NULL)
4021 {
4022 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4023 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4024 if (ent->plt.refcount > 0)
4025 ent->plt.refcount -= 1;
4026 }
4027 break;
4028
4029 default:
4030 break;
4031 }
4032 }
4033 return TRUE;
4034}
4035\f
4036/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4037
4038asection *
4039ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4040{
4041 struct ppc_elf_link_hash_table *htab;
4042
4043 htab = ppc_elf_hash_table (info);
4044 if (htab->plt_type == PLT_NEW
4045 && htab->plt != NULL
4046 && htab->plt->output_section != NULL)
4047 {
4048 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4049 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4050 }
4051
4052 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4053 FALSE, FALSE, TRUE);
4054 return _bfd_elf_tls_setup (obfd, info);
4055}
4056
4057/* Run through all the TLS relocs looking for optimization
4058 opportunities. */
4059
4060bfd_boolean
4061ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4062 struct bfd_link_info *info)
4063{
4064 bfd *ibfd;
4065 asection *sec;
4066 struct ppc_elf_link_hash_table *htab;
4067
4068 if (info->relocatable || info->shared)
4069 return TRUE;
4070
4071 htab = ppc_elf_hash_table (info);
4072 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4073 {
4074 Elf_Internal_Sym *locsyms = NULL;
4075 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4076
4077 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4078 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4079 {
4080 Elf_Internal_Rela *relstart, *rel, *relend;
4081 int expecting_tls_get_addr;
4082
4083 /* Read the relocations. */
4084 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4085 info->keep_memory);
4086 if (relstart == NULL)
4087 return FALSE;
4088
4089 expecting_tls_get_addr = 0;
4090 relend = relstart + sec->reloc_count;
4091 for (rel = relstart; rel < relend; rel++)
4092 {
4093 enum elf_ppc_reloc_type r_type;
4094 unsigned long r_symndx;
4095 struct elf_link_hash_entry *h = NULL;
4096 char *tls_mask;
4097 char tls_set, tls_clear;
4098 bfd_boolean is_local;
4099
4100 r_symndx = ELF32_R_SYM (rel->r_info);
4101 if (r_symndx >= symtab_hdr->sh_info)
4102 {
4103 struct elf_link_hash_entry **sym_hashes;
4104
4105 sym_hashes = elf_sym_hashes (ibfd);
4106 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4107 while (h->root.type == bfd_link_hash_indirect
4108 || h->root.type == bfd_link_hash_warning)
4109 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4110 }
4111
4112 is_local = FALSE;
4113 if (h == NULL
4114 || !h->def_dynamic)
4115 is_local = TRUE;
4116
4117 r_type = ELF32_R_TYPE (rel->r_info);
4118 switch (r_type)
4119 {
4120 case R_PPC_GOT_TLSLD16:
4121 case R_PPC_GOT_TLSLD16_LO:
4122 case R_PPC_GOT_TLSLD16_HI:
4123 case R_PPC_GOT_TLSLD16_HA:
4124 /* These relocs should never be against a symbol
4125 defined in a shared lib. Leave them alone if
4126 that turns out to be the case. */
4127 expecting_tls_get_addr = 0;
4128 htab->tlsld_got.refcount -= 1;
4129 if (!is_local)
4130 continue;
4131
4132 /* LD -> LE */
4133 tls_set = 0;
4134 tls_clear = TLS_LD;
4135 expecting_tls_get_addr = 1;
4136 break;
4137
4138 case R_PPC_GOT_TLSGD16:
4139 case R_PPC_GOT_TLSGD16_LO:
4140 case R_PPC_GOT_TLSGD16_HI:
4141 case R_PPC_GOT_TLSGD16_HA:
4142 if (is_local)
4143 /* GD -> LE */
4144 tls_set = 0;
4145 else
4146 /* GD -> IE */
4147 tls_set = TLS_TLS | TLS_TPRELGD;
4148 tls_clear = TLS_GD;
4149 expecting_tls_get_addr = 1;
4150 break;
4151
4152 case R_PPC_GOT_TPREL16:
4153 case R_PPC_GOT_TPREL16_LO:
4154 case R_PPC_GOT_TPREL16_HI:
4155 case R_PPC_GOT_TPREL16_HA:
4156 expecting_tls_get_addr = 0;
4157 if (is_local)
4158 {
4159 /* IE -> LE */
4160 tls_set = 0;
4161 tls_clear = TLS_TPREL;
4162 break;
4163 }
4164 else
4165 continue;
4166
4167 case R_PPC_REL14:
4168 case R_PPC_REL14_BRTAKEN:
4169 case R_PPC_REL14_BRNTAKEN:
4170 case R_PPC_REL24:
4171 if (expecting_tls_get_addr
4172 && h != NULL
4173 && h == htab->tls_get_addr)
4174 {
4175 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
4176 if (ent != NULL && ent->plt.refcount > 0)
4177 ent->plt.refcount -= 1;
4178 }
4179 expecting_tls_get_addr = 0;
4180 continue;
4181
4182 default:
4183 expecting_tls_get_addr = 0;
4184 continue;
4185 }
4186
4187 if (h != NULL)
4188 {
4189 if (tls_set == 0)
4190 {
4191 /* We managed to get rid of a got entry. */
4192 if (h->got.refcount > 0)
4193 h->got.refcount -= 1;
4194 }
4195 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4196 }
4197 else
4198 {
4199 Elf_Internal_Sym *sym;
4200 bfd_signed_vma *lgot_refs;
4201 char *lgot_masks;
4202
4203 if (locsyms == NULL)
4204 {
4205 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4206 if (locsyms == NULL)
4207 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4208 symtab_hdr->sh_info,
4209 0, NULL, NULL, NULL);
4210 if (locsyms == NULL)
4211 {
4212 if (elf_section_data (sec)->relocs != relstart)
4213 free (relstart);
4214 return FALSE;
4215 }
4216 }
4217 sym = locsyms + r_symndx;
4218 lgot_refs = elf_local_got_refcounts (ibfd);
4219 if (lgot_refs == NULL)
4220 abort ();
4221 if (tls_set == 0)
4222 {
4223 /* We managed to get rid of a got entry. */
4224 if (lgot_refs[r_symndx] > 0)
4225 lgot_refs[r_symndx] -= 1;
4226 }
4227 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4228 tls_mask = &lgot_masks[r_symndx];
4229 }
4230
4231 *tls_mask |= tls_set;
4232 *tls_mask &= ~tls_clear;
4233 }
4234
4235 if (elf_section_data (sec)->relocs != relstart)
4236 free (relstart);
4237 }
4238
4239 if (locsyms != NULL
4240 && (symtab_hdr->contents != (unsigned char *) locsyms))
4241 {
4242 if (!info->keep_memory)
4243 free (locsyms);
4244 else
4245 symtab_hdr->contents = (unsigned char *) locsyms;
4246 }
4247 }
4248 return TRUE;
4249}
4250\f
4251/* Adjust a symbol defined by a dynamic object and referenced by a
4252 regular object. The current definition is in some section of the
4253 dynamic object, but we're not including those sections. We have to
4254 change the definition to something the rest of the link can
4255 understand. */
4256
4257static bfd_boolean
4258ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4259 struct elf_link_hash_entry *h)
4260{
4261 struct ppc_elf_link_hash_table *htab;
4262 asection *s;
4263
4264#ifdef DEBUG
4265 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4266 h->root.root.string);
4267#endif
4268
4269 /* Make sure we know what is going on here. */
4270 htab = ppc_elf_hash_table (info);
4271 BFD_ASSERT (htab->elf.dynobj != NULL
4272 && (h->needs_plt
4273 || h->u.weakdef != NULL
4274 || (h->def_dynamic
4275 && h->ref_regular
4276 && !h->def_regular)));
4277
4278 /* Deal with function syms. */
4279 if (h->type == STT_FUNC
4280 || h->needs_plt)
4281 {
4282 /* Clear procedure linkage table information for any symbol that
4283 won't need a .plt entry. */
4284 struct plt_entry *ent;
4285 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4286 if (ent->plt.refcount > 0)
4287 break;
4288 if (ent == NULL
4289 || SYMBOL_CALLS_LOCAL (info, h)
4290 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4291 && h->root.type == bfd_link_hash_undefweak))
4292 {
4293 /* A PLT entry is not required/allowed when:
4294
4295 1. We are not using ld.so; because then the PLT entry
4296 can't be set up, so we can't use one. In this case,
4297 ppc_elf_adjust_dynamic_symbol won't even be called.
4298
4299 2. GC has rendered the entry unused.
4300
4301 3. We know for certain that a call to this symbol
4302 will go to this object, or will remain undefined. */
4303 h->plt.plist = NULL;
4304 h->needs_plt = 0;
4305 }
4306 return TRUE;
4307 }
4308 else
4309 h->plt.plist = NULL;
4310
4311 /* If this is a weak symbol, and there is a real definition, the
4312 processor independent code will have arranged for us to see the
4313 real definition first, and we can just use the same value. */
4314 if (h->u.weakdef != NULL)
4315 {
4316 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4317 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4318 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4319 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4320 if (ELIMINATE_COPY_RELOCS)
4321 h->non_got_ref = h->u.weakdef->non_got_ref;
4322 return TRUE;
4323 }
4324
4325 /* This is a reference to a symbol defined by a dynamic object which
4326 is not a function. */
4327
4328 /* If we are creating a shared library, we must presume that the
4329 only references to the symbol are via the global offset table.
4330 For such cases we need not do anything here; the relocations will
4331 be handled correctly by relocate_section. */
4332 if (info->shared)
4333 return TRUE;
4334
4335 /* If there are no references to this symbol that do not use the
4336 GOT, we don't need to generate a copy reloc. */
4337 if (!h->non_got_ref)
4338 return TRUE;
4339
4340 /* If we didn't find any dynamic relocs in read-only sections, then
4341 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4342 We can't do this if there are any small data relocations. This
4343 doesn't work on VxWorks, where we can not have dynamic
4344 relocations (other than copy and jump slot relocations) in an
4345 executable. */
4346 if (ELIMINATE_COPY_RELOCS
4347 && !ppc_elf_hash_entry (h)->has_sda_refs
4348 && !htab->is_vxworks)
4349 {
4350 struct ppc_elf_dyn_relocs *p;
4351 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4352 {
4353 s = p->sec->output_section;
4354 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4355 break;
4356 }
4357
4358 if (p == NULL)
4359 {
4360 h->non_got_ref = 0;
4361 return TRUE;
4362 }
4363 }
4364
4365 if (h->size == 0)
4366 {
4367 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4368 h->root.root.string);
4369 return TRUE;
4370 }
4371
4372 /* We must allocate the symbol in our .dynbss section, which will
4373 become part of the .bss section of the executable. There will be
4374 an entry for this symbol in the .dynsym section. The dynamic
4375 object will contain position independent code, so all references
4376 from the dynamic object to this symbol will go through the global
4377 offset table. The dynamic linker will use the .dynsym entry to
4378 determine the address it must put in the global offset table, so
4379 both the dynamic object and the regular object will refer to the
4380 same memory location for the variable.
4381
4382 Of course, if the symbol is referenced using SDAREL relocs, we
4383 must instead allocate it in .sbss. */
4384
4385 if (ppc_elf_hash_entry (h)->has_sda_refs)
4386 s = htab->dynsbss;
4387 else
4388 s = htab->dynbss;
4389 BFD_ASSERT (s != NULL);
4390
4391 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4392 copy the initial value out of the dynamic object and into the
4393 runtime process image. We need to remember the offset into the
4394 .rela.bss section we are going to use. */
4395 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4396 {
4397 asection *srel;
4398
4399 if (ppc_elf_hash_entry (h)->has_sda_refs)
4400 srel = htab->relsbss;
4401 else
4402 srel = htab->relbss;
4403 BFD_ASSERT (srel != NULL);
4404 srel->size += sizeof (Elf32_External_Rela);
4405 h->needs_copy = 1;
4406 }
4407
4408 return _bfd_elf_adjust_dynamic_copy (h, s);
4409}
4410\f
4411/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4412 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4413 specifying the addend on the plt relocation. For -fpic code, the sym
4414 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4415 xxxxxxxx.got2.plt_pic32.<callee>. */
4416
4417static bfd_boolean
4418add_stub_sym (struct plt_entry *ent,
4419 struct elf_link_hash_entry *h,
4420 struct bfd_link_info *info)
4421{
4422 struct elf_link_hash_entry *sh;
4423 size_t len1, len2, len3;
4424 char *name;
4425 const char *stub;
4426 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4427
4428 if (info->shared || info->pie)
4429 stub = ".plt_pic32.";
4430 else
4431 stub = ".plt_call32.";
4432
4433 len1 = strlen (h->root.root.string);
4434 len2 = strlen (stub);
4435 len3 = 0;
4436 if (ent->sec)
4437 len3 = strlen (ent->sec->name);
4438 name = bfd_malloc (len1 + len2 + len3 + 9);
4439 if (name == NULL)
4440 return FALSE;
4441 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4442 if (ent->sec)
4443 memcpy (name + 8, ent->sec->name, len3);
4444 memcpy (name + 8 + len3, stub, len2);
4445 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4446 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4447 if (sh == NULL)
4448 return FALSE;
4449 if (sh->root.type == bfd_link_hash_new)
4450 {
4451 sh->root.type = bfd_link_hash_defined;
4452 sh->root.u.def.section = htab->glink;
4453 sh->root.u.def.value = ent->glink_offset;
4454 sh->ref_regular = 1;
4455 sh->def_regular = 1;
4456 sh->ref_regular_nonweak = 1;
4457 sh->forced_local = 1;
4458 sh->non_elf = 0;
4459 }
4460 return TRUE;
4461}
4462
4463/* Allocate NEED contiguous space in .got, and return the offset.
4464 Handles allocation of the got header when crossing 32k. */
4465
4466static bfd_vma
4467allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4468{
4469 bfd_vma where;
4470 unsigned int max_before_header;
4471
4472 if (htab->plt_type == PLT_VXWORKS)
4473 {
4474 where = htab->got->size;
4475 htab->got->size += need;
4476 }
4477 else
4478 {
4479 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4480 if (need <= htab->got_gap)
4481 {
4482 where = max_before_header - htab->got_gap;
4483 htab->got_gap -= need;
4484 }
4485 else
4486 {
4487 if (htab->got->size + need > max_before_header
4488 && htab->got->size <= max_before_header)
4489 {
4490 htab->got_gap = max_before_header - htab->got->size;
4491 htab->got->size = max_before_header + htab->got_header_size;
4492 }
4493 where = htab->got->size;
4494 htab->got->size += need;
4495 }
4496 }
4497 return where;
4498}
4499
4500/* Allocate space in associated reloc sections for dynamic relocs. */
4501
4502static bfd_boolean
4503allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4504{
4505 struct bfd_link_info *info = inf;
4506 struct ppc_elf_link_hash_entry *eh;
4507 struct ppc_elf_link_hash_table *htab;
4508 struct ppc_elf_dyn_relocs *p;
4509
4510 if (h->root.type == bfd_link_hash_indirect)
4511 return TRUE;
4512
4513 if (h->root.type == bfd_link_hash_warning)
4514 /* When warning symbols are created, they **replace** the "real"
4515 entry in the hash table, thus we never get to see the real
4516 symbol in a hash traversal. So look at it now. */
4517 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4518
4519 htab = ppc_elf_hash_table (info);
4520 if (htab->elf.dynamic_sections_created)
4521 {
4522 struct plt_entry *ent;
4523 bfd_boolean doneone = FALSE;
4524 bfd_vma plt_offset = 0, glink_offset = 0;
4525
4526 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4527 if (ent->plt.refcount > 0)
4528 {
4529 /* Make sure this symbol is output as a dynamic symbol. */
4530 if (h->dynindx == -1
4531 && !h->forced_local)
4532 {
4533 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4534 return FALSE;
4535 }
4536
4537 if (info->shared
4538 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4539 {
4540 asection *s = htab->plt;
4541
4542 if (htab->plt_type == PLT_NEW)
4543 {
4544 if (!doneone)
4545 {
4546 plt_offset = s->size;
4547 s->size += 4;
4548 }
4549 ent->plt.offset = plt_offset;
4550
4551 s = htab->glink;
4552 if (!doneone || info->shared || info->pie)
4553 {
4554 glink_offset = s->size;
4555 s->size += GLINK_ENTRY_SIZE;
4556 }
4557 if (!doneone
4558 && !info->shared
4559 && !h->def_regular)
4560 {
4561 h->root.u.def.section = s;
4562 h->root.u.def.value = glink_offset;
4563 }
4564 ent->glink_offset = glink_offset;
4565
4566 if (htab->emit_stub_syms
4567 && !add_stub_sym (ent, h, info))
4568 return FALSE;
4569 }
4570 else
4571 {
4572 if (!doneone)
4573 {
4574 /* If this is the first .plt entry, make room
4575 for the special first entry. */
4576 if (s->size == 0)
4577 s->size += htab->plt_initial_entry_size;
4578
4579 /* The PowerPC PLT is actually composed of two
4580 parts, the first part is 2 words (for a load
4581 and a jump), and then there is a remaining
4582 word available at the end. */
4583 plt_offset = (htab->plt_initial_entry_size
4584 + (htab->plt_slot_size
4585 * ((s->size
4586 - htab->plt_initial_entry_size)
4587 / htab->plt_entry_size)));
4588
4589 /* If this symbol is not defined in a regular
4590 file, and we are not generating a shared
4591 library, then set the symbol to this location
4592 in the .plt. This is required to make
4593 function pointers compare as equal between
4594 the normal executable and the shared library. */
4595 if (! info->shared
4596 && !h->def_regular)
4597 {
4598 h->root.u.def.section = s;
4599 h->root.u.def.value = plt_offset;
4600 }
4601
4602 /* Make room for this entry. */
4603 s->size += htab->plt_entry_size;
4604 /* After the 8192nd entry, room for two entries
4605 is allocated. */
4606 if (htab->plt_type == PLT_OLD
4607 && (s->size - htab->plt_initial_entry_size)
4608 / htab->plt_entry_size
4609 > PLT_NUM_SINGLE_ENTRIES)
4610 s->size += htab->plt_entry_size;
4611 }
4612 ent->plt.offset = plt_offset;
4613 }
4614
4615 /* We also need to make an entry in the .rela.plt section. */
4616 if (!doneone)
4617 {
4618 htab->relplt->size += sizeof (Elf32_External_Rela);
4619
4620 if (htab->plt_type == PLT_VXWORKS)
4621 {
4622 /* Allocate space for the unloaded relocations. */
4623 if (!info->shared)
4624 {
4625 if (ent->plt.offset
4626 == (bfd_vma) htab->plt_initial_entry_size)
4627 {
4628 htab->srelplt2->size
4629 += sizeof (Elf32_External_Rela)
4630 * VXWORKS_PLTRESOLVE_RELOCS;
4631 }
4632
4633 htab->srelplt2->size
4634 += sizeof (Elf32_External_Rela)
4635 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4636 }
4637
4638 /* Every PLT entry has an associated GOT entry in
4639 .got.plt. */
4640 htab->sgotplt->size += 4;
4641 }
4642 doneone = TRUE;
4643 }
4644 }
4645 else
4646 ent->plt.offset = (bfd_vma) -1;
4647 }
4648 else
4649 ent->plt.offset = (bfd_vma) -1;
4650
4651 if (!doneone)
4652 {
4653 h->plt.plist = NULL;
4654 h->needs_plt = 0;
4655 }
4656 }
4657 else
4658 {
4659 h->plt.plist = NULL;
4660 h->needs_plt = 0;
4661 }
4662
4663 eh = (struct ppc_elf_link_hash_entry *) h;
4664 if (eh->elf.got.refcount > 0)
4665 {
4666 /* Make sure this symbol is output as a dynamic symbol. */
4667 if (eh->elf.dynindx == -1
4668 && !eh->elf.forced_local)
4669 {
4670 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4671 return FALSE;
4672 }
4673
4674 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4675 && !eh->elf.def_dynamic)
4676 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4677 eh->elf.got.offset = (bfd_vma) -1;
4678 else
4679 {
4680 bfd_boolean dyn;
4681 unsigned int need = 0;
4682 if ((eh->tls_mask & TLS_TLS) != 0)
4683 {
4684 if ((eh->tls_mask & TLS_LD) != 0)
4685 need += 8;
4686 if ((eh->tls_mask & TLS_GD) != 0)
4687 need += 8;
4688 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4689 need += 4;
4690 if ((eh->tls_mask & TLS_DTPREL) != 0)
4691 need += 4;
4692 }
4693 else
4694 need += 4;
4695 eh->elf.got.offset = allocate_got (htab, need);
4696 dyn = htab->elf.dynamic_sections_created;
4697 if ((info->shared
4698 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4699 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4700 || eh->elf.root.type != bfd_link_hash_undefweak))
4701 {
4702 /* All the entries we allocated need relocs.
4703 Except LD only needs one. */
4704 if ((eh->tls_mask & TLS_LD) != 0)
4705 need -= 4;
4706 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4707 }
4708 }
4709 }
4710 else
4711 eh->elf.got.offset = (bfd_vma) -1;
4712
4713 if (eh->dyn_relocs == NULL)
4714 return TRUE;
4715
4716 /* In the shared -Bsymbolic case, discard space allocated for
4717 dynamic pc-relative relocs against symbols which turn out to be
4718 defined in regular objects. For the normal shared case, discard
4719 space for relocs that have become local due to symbol visibility
4720 changes. */
4721
4722 if (info->shared)
4723 {
4724 /* Relocs that use pc_count are those that appear on a call insn,
4725 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4726 generated via assembly. We want calls to protected symbols to
4727 resolve directly to the function rather than going via the plt.
4728 If people want function pointer comparisons to work as expected
4729 then they should avoid writing weird assembly. */
4730 if (SYMBOL_CALLS_LOCAL (info, h))
4731 {
4732 struct ppc_elf_dyn_relocs **pp;
4733
4734 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4735 {
4736 p->count -= p->pc_count;
4737 p->pc_count = 0;
4738 if (p->count == 0)
4739 *pp = p->next;
4740 else
4741 pp = &p->next;
4742 }
4743 }
4744
4745 /* Also discard relocs on undefined weak syms with non-default
4746 visibility. */
4747 if (eh->dyn_relocs != NULL
4748 && h->root.type == bfd_link_hash_undefweak)
4749 {
4750 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4751 eh->dyn_relocs = NULL;
4752
4753 /* Make sure undefined weak symbols are output as a dynamic
4754 symbol in PIEs. */
4755 else if (h->dynindx == -1
4756 && !h->forced_local)
4757 {
4758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4759 return FALSE;
4760 }
4761 }
4762 }
4763 else if (ELIMINATE_COPY_RELOCS)
4764 {
4765 /* For the non-shared case, discard space for relocs against
4766 symbols which turn out to need copy relocs or are not
4767 dynamic. */
4768
4769 if (!h->non_got_ref
4770 && h->def_dynamic
4771 && !h->def_regular)
4772 {
4773 /* Make sure this symbol is output as a dynamic symbol.
4774 Undefined weak syms won't yet be marked as dynamic. */
4775 if (h->dynindx == -1
4776 && !h->forced_local)
4777 {
4778 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4779 return FALSE;
4780 }
4781
4782 /* If that succeeded, we know we'll be keeping all the
4783 relocs. */
4784 if (h->dynindx != -1)
4785 goto keep;
4786 }
4787
4788 eh->dyn_relocs = NULL;
4789
4790 keep: ;
4791 }
4792
4793 /* Finally, allocate space. */
4794 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4795 {
4796 asection *sreloc = elf_section_data (p->sec)->sreloc;
4797 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4798 }
4799
4800 return TRUE;
4801}
4802
4803/* Find any dynamic relocs that apply to read-only sections. */
4804
4805static bfd_boolean
4806readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4807{
4808 struct ppc_elf_dyn_relocs *p;
4809
4810 if (h->root.type == bfd_link_hash_indirect)
4811 return TRUE;
4812
4813 if (h->root.type == bfd_link_hash_warning)
4814 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4815
4816 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4817 {
4818 asection *s = p->sec->output_section;
4819
4820 if (s != NULL
4821 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4822 == (SEC_READONLY | SEC_ALLOC)))
4823 {
4824 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4825
4826 /* Not an error, just cut short the traversal. */
4827 return FALSE;
4828 }
4829 }
4830 return TRUE;
4831}
4832
4833/* Set the sizes of the dynamic sections. */
4834
4835static bfd_boolean
4836ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4837 struct bfd_link_info *info)
4838{
4839 struct ppc_elf_link_hash_table *htab;
4840 asection *s;
4841 bfd_boolean relocs;
4842 bfd *ibfd;
4843
4844#ifdef DEBUG
4845 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4846#endif
4847
4848 htab = ppc_elf_hash_table (info);
4849 BFD_ASSERT (htab->elf.dynobj != NULL);
4850
4851 if (elf_hash_table (info)->dynamic_sections_created)
4852 {
4853 /* Set the contents of the .interp section to the interpreter. */
4854 if (info->executable)
4855 {
4856 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4857 BFD_ASSERT (s != NULL);
4858 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4859 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4860 }
4861 }
4862
4863 if (htab->plt_type == PLT_OLD)
4864 htab->got_header_size = 16;
4865 else if (htab->plt_type == PLT_NEW)
4866 htab->got_header_size = 12;
4867
4868 /* Set up .got offsets for local syms, and space for local dynamic
4869 relocs. */
4870 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4871 {
4872 bfd_signed_vma *local_got;
4873 bfd_signed_vma *end_local_got;
4874 char *lgot_masks;
4875 bfd_size_type locsymcount;
4876 Elf_Internal_Shdr *symtab_hdr;
4877
4878 if (!is_ppc_elf_target (ibfd->xvec))
4879 continue;
4880
4881 for (s = ibfd->sections; s != NULL; s = s->next)
4882 {
4883 struct ppc_elf_dyn_relocs *p;
4884
4885 for (p = ((struct ppc_elf_dyn_relocs *)
4886 elf_section_data (s)->local_dynrel);
4887 p != NULL;
4888 p = p->next)
4889 {
4890 if (!bfd_is_abs_section (p->sec)
4891 && bfd_is_abs_section (p->sec->output_section))
4892 {
4893 /* Input section has been discarded, either because
4894 it is a copy of a linkonce section or due to
4895 linker script /DISCARD/, so we'll be discarding
4896 the relocs too. */
4897 }
4898 else if (p->count != 0)
4899 {
4900 elf_section_data (p->sec)->sreloc->size
4901 += p->count * sizeof (Elf32_External_Rela);
4902 if ((p->sec->output_section->flags
4903 & (SEC_READONLY | SEC_ALLOC))
4904 == (SEC_READONLY | SEC_ALLOC))
4905 info->flags |= DF_TEXTREL;
4906 }
4907 }
4908 }
4909
4910 local_got = elf_local_got_refcounts (ibfd);
4911 if (!local_got)
4912 continue;
4913
4914 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4915 locsymcount = symtab_hdr->sh_info;
4916 end_local_got = local_got + locsymcount;
4917 lgot_masks = (char *) end_local_got;
4918 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4919 if (*local_got > 0)
4920 {
4921 if (*lgot_masks == (TLS_TLS | TLS_LD))
4922 {
4923 /* If just an LD reloc, we'll just use
4924 htab->tlsld_got.offset. */
4925 htab->tlsld_got.refcount += 1;
4926 *local_got = (bfd_vma) -1;
4927 }
4928 else
4929 {
4930 unsigned int need = 0;
4931 if ((*lgot_masks & TLS_TLS) != 0)
4932 {
4933 if ((*lgot_masks & TLS_GD) != 0)
4934 need += 8;
4935 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4936 need += 4;
4937 if ((*lgot_masks & TLS_DTPREL) != 0)
4938 need += 4;
4939 }
4940 else
4941 need += 4;
4942 *local_got = allocate_got (htab, need);
4943 if (info->shared)
4944 htab->relgot->size += (need
4945 * (sizeof (Elf32_External_Rela) / 4));
4946 }
4947 }
4948 else
4949 *local_got = (bfd_vma) -1;
4950 }
4951
4952 if (htab->tlsld_got.refcount > 0)
4953 {
4954 htab->tlsld_got.offset = allocate_got (htab, 8);
4955 if (info->shared)
4956 htab->relgot->size += sizeof (Elf32_External_Rela);
4957 }
4958 else
4959 htab->tlsld_got.offset = (bfd_vma) -1;
4960
4961 /* Allocate space for global sym dynamic relocs. */
4962 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4963
4964 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4965 {
4966 unsigned int g_o_t = 32768;
4967
4968 /* If we haven't allocated the header, do so now. When we get here,
4969 for old plt/got the got size will be 0 to 32764 (not allocated),
4970 or 32780 to 65536 (header allocated). For new plt/got, the
4971 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4972 if (htab->got->size <= 32768)
4973 {
4974 g_o_t = htab->got->size;
4975 if (htab->plt_type == PLT_OLD)
4976 g_o_t += 4;
4977 htab->got->size += htab->got_header_size;
4978 }
4979
4980 htab->elf.hgot->root.u.def.value = g_o_t;
4981 }
4982
4983 if (htab->glink != NULL && htab->glink->size != 0)
4984 {
4985 htab->glink_pltresolve = htab->glink->size;
4986 /* Space for the branch table. */
4987 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4988 /* Pad out to align the start of PLTresolve. */
4989 htab->glink->size += -htab->glink->size & 15;
4990 htab->glink->size += GLINK_PLTRESOLVE;
4991
4992 if (htab->emit_stub_syms)
4993 {
4994 struct elf_link_hash_entry *sh;
4995 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4996 TRUE, FALSE, FALSE);
4997 if (sh == NULL)
4998 return FALSE;
4999 if (sh->root.type == bfd_link_hash_new)
5000 {
5001 sh->root.type = bfd_link_hash_defined;
5002 sh->root.u.def.section = htab->glink;
5003 sh->root.u.def.value = htab->glink_pltresolve;
5004 sh->ref_regular = 1;
5005 sh->def_regular = 1;
5006 sh->ref_regular_nonweak = 1;
5007 sh->forced_local = 1;
5008 sh->non_elf = 0;
5009 }
5010 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5011 TRUE, FALSE, FALSE);
5012 if (sh == NULL)
5013 return FALSE;
5014 if (sh->root.type == bfd_link_hash_new)
5015 {
5016 sh->root.type = bfd_link_hash_defined;
5017 sh->root.u.def.section = htab->glink;
5018 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5019 sh->ref_regular = 1;
5020 sh->def_regular = 1;
5021 sh->ref_regular_nonweak = 1;
5022 sh->forced_local = 1;
5023 sh->non_elf = 0;
5024 }
5025 }
5026 }
5027
5028 /* We've now determined the sizes of the various dynamic sections.
5029 Allocate memory for them. */
5030 relocs = FALSE;
5031 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5032 {
5033 bfd_boolean strip_section = TRUE;
5034
5035 if ((s->flags & SEC_LINKER_CREATED) == 0)
5036 continue;
5037
5038 if (s == htab->plt
5039 || s == htab->glink
5040 || s == htab->got
5041 || s == htab->sgotplt
5042 || s == htab->sbss
5043 || s == htab->dynbss
5044 || s == htab->dynsbss)
5045 {
5046 /* We'd like to strip these sections if they aren't needed, but if
5047 we've exported dynamic symbols from them we must leave them.
5048 It's too late to tell BFD to get rid of the symbols. */
5049 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5050 strip_section = FALSE;
5051 /* Strip this section if we don't need it; see the
5052 comment below. */
5053 }
5054 else if (s == htab->sdata[0].section
5055 || s == htab->sdata[1].section)
5056 {
5057 /* Strip these too. */
5058 }
5059 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5060 {
5061 if (s->size != 0)
5062 {
5063 /* Remember whether there are any relocation sections. */
5064 relocs = TRUE;
5065
5066 /* We use the reloc_count field as a counter if we need
5067 to copy relocs into the output file. */
5068 s->reloc_count = 0;
5069 }
5070 }
5071 else
5072 {
5073 /* It's not one of our sections, so don't allocate space. */
5074 continue;
5075 }
5076
5077 if (s->size == 0 && strip_section)
5078 {
5079 /* If we don't need this section, strip it from the
5080 output file. This is mostly to handle .rela.bss and
5081 .rela.plt. We must create both sections in
5082 create_dynamic_sections, because they must be created
5083 before the linker maps input sections to output
5084 sections. The linker does that before
5085 adjust_dynamic_symbol is called, and it is that
5086 function which decides whether anything needs to go
5087 into these sections. */
5088 s->flags |= SEC_EXCLUDE;
5089 continue;
5090 }
5091
5092 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5093 continue;
5094
5095 /* Allocate memory for the section contents. */
5096 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5097 if (s->contents == NULL)
5098 return FALSE;
5099 }
5100
5101 if (htab->elf.dynamic_sections_created)
5102 {
5103 /* Add some entries to the .dynamic section. We fill in the
5104 values later, in ppc_elf_finish_dynamic_sections, but we
5105 must add the entries now so that we get the correct size for
5106 the .dynamic section. The DT_DEBUG entry is filled in by the
5107 dynamic linker and used by the debugger. */
5108#define add_dynamic_entry(TAG, VAL) \
5109 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5110
5111 if (info->executable)
5112 {
5113 if (!add_dynamic_entry (DT_DEBUG, 0))
5114 return FALSE;
5115 }
5116
5117 if (htab->plt != NULL && htab->plt->size != 0)
5118 {
5119 if (!add_dynamic_entry (DT_PLTGOT, 0)
5120 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5121 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5122 || !add_dynamic_entry (DT_JMPREL, 0))
5123 return FALSE;
5124 }
5125
5126 if (htab->glink != NULL && htab->glink->size != 0)
5127 {
5128 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5129 return FALSE;
5130 }
5131
5132 if (relocs)
5133 {
5134 if (!add_dynamic_entry (DT_RELA, 0)
5135 || !add_dynamic_entry (DT_RELASZ, 0)
5136 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5137 return FALSE;
5138 }
5139
5140 /* If any dynamic relocs apply to a read-only section, then we
5141 need a DT_TEXTREL entry. */
5142 if ((info->flags & DF_TEXTREL) == 0)
5143 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5144 info);
5145
5146 if ((info->flags & DF_TEXTREL) != 0)
5147 {
5148 if (!add_dynamic_entry (DT_TEXTREL, 0))
5149 return FALSE;
5150 }
5151 }
5152#undef add_dynamic_entry
5153
5154 return TRUE;
5155}
5156\f
5157#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5158
5159static const int shared_stub_entry[] =
5160 {
5161 0x7c0802a6, /* mflr 0 */
5162 0x429f0005, /* bcl 20, 31, .Lxxx */
5163 0x7d6802a6, /* mflr 11 */
5164 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5165 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5166 0x7c0803a6, /* mtlr 0 */
5167 0x7d6903a6, /* mtctr 11 */
5168 0x4e800420, /* bctr */
5169 };
5170
5171static const int stub_entry[] =
5172 {
5173 0x3d600000, /* lis 11,xxx@ha */
5174 0x396b0000, /* addi 11,11,xxx@l */
5175 0x7d6903a6, /* mtctr 11 */
5176 0x4e800420, /* bctr */
5177 };
5178
5179static bfd_boolean
5180ppc_elf_relax_section (bfd *abfd,
5181 asection *isec,
5182 struct bfd_link_info *link_info,
5183 bfd_boolean *again)
5184{
5185 struct one_fixup
5186 {
5187 struct one_fixup *next;
5188 asection *tsec;
5189 bfd_vma toff;
5190 bfd_vma trampoff;
5191 };
5192
5193 Elf_Internal_Shdr *symtab_hdr;
5194 bfd_byte *contents = NULL;
5195 Elf_Internal_Sym *isymbuf = NULL;
5196 Elf_Internal_Rela *internal_relocs = NULL;
5197 Elf_Internal_Rela *irel, *irelend;
5198 struct one_fixup *fixups = NULL;
5199 bfd_boolean changed;
5200 struct ppc_elf_link_hash_table *htab;
5201 bfd_size_type trampoff;
5202 asection *got2;
5203
5204 *again = FALSE;
5205
5206 /* Nothing to do if there are no relocations, and no need to do
5207 anything with non-alloc sections. */
5208 if ((isec->flags & SEC_ALLOC) == 0
5209 || (isec->flags & SEC_RELOC) == 0
5210 || isec->reloc_count == 0)
5211 return TRUE;
5212
5213 trampoff = (isec->size + 3) & (bfd_vma) -4;
5214 /* Space for a branch around any trampolines. */
5215 trampoff += 4;
5216
5217 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5218
5219 /* Get a copy of the native relocations. */
5220 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5221 link_info->keep_memory);
5222 if (internal_relocs == NULL)
5223 goto error_return;
5224
5225 htab = ppc_elf_hash_table (link_info);
5226 got2 = bfd_get_section_by_name (abfd, ".got2");
5227
5228 irelend = internal_relocs + isec->reloc_count;
5229 for (irel = internal_relocs; irel < irelend; irel++)
5230 {
5231 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5232 bfd_vma symaddr, reladdr, toff, roff;
5233 asection *tsec;
5234 struct one_fixup *f;
5235 size_t insn_offset = 0;
5236 bfd_vma max_branch_offset, val;
5237 bfd_byte *hit_addr;
5238 unsigned long t0;
5239 unsigned char sym_type;
5240
5241 switch (r_type)
5242 {
5243 case R_PPC_REL24:
5244 case R_PPC_LOCAL24PC:
5245 case R_PPC_PLTREL24:
5246 max_branch_offset = 1 << 25;
5247 break;
5248
5249 case R_PPC_REL14:
5250 case R_PPC_REL14_BRTAKEN:
5251 case R_PPC_REL14_BRNTAKEN:
5252 max_branch_offset = 1 << 15;
5253 break;
5254
5255 default:
5256 continue;
5257 }
5258
5259 /* Get the value of the symbol referred to by the reloc. */
5260 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5261 {
5262 /* A local symbol. */
5263 Elf_Internal_Sym *isym;
5264
5265 /* Read this BFD's local symbols. */
5266 if (isymbuf == NULL)
5267 {
5268 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5269 if (isymbuf == NULL)
5270 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5271 symtab_hdr->sh_info, 0,
5272 NULL, NULL, NULL);
5273 if (isymbuf == 0)
5274 goto error_return;
5275 }
5276 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5277 if (isym->st_shndx == SHN_UNDEF)
5278 continue; /* We can't do anything with undefined symbols. */
5279 else if (isym->st_shndx == SHN_ABS)
5280 tsec = bfd_abs_section_ptr;
5281 else if (isym->st_shndx == SHN_COMMON)
5282 tsec = bfd_com_section_ptr;
5283 else
5284 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5285
5286 toff = isym->st_value;
5287 sym_type = ELF_ST_TYPE (isym->st_info);
5288 }
5289 else
5290 {
5291 /* Global symbol handling. */
5292 unsigned long indx;
5293 struct elf_link_hash_entry *h;
5294
5295 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5296 h = elf_sym_hashes (abfd)[indx];
5297
5298 while (h->root.type == bfd_link_hash_indirect
5299 || h->root.type == bfd_link_hash_warning)
5300 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5301
5302 tsec = NULL;
5303 toff = 0;
5304 if (r_type == R_PPC_PLTREL24
5305 && htab->plt != NULL)
5306 {
5307 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5308
5309 if (ent != NULL)
5310 {
5311 if (htab->plt_type == PLT_NEW)
5312 {
5313 tsec = htab->glink;
5314 toff = ent->glink_offset;
5315 }
5316 else
5317 {
5318 tsec = htab->plt;
5319 toff = ent->plt.offset;
5320 }
5321 }
5322 }
5323 if (tsec != NULL)
5324 ;
5325 else if (h->root.type == bfd_link_hash_defined
5326 || h->root.type == bfd_link_hash_defweak)
5327 {
5328 tsec = h->root.u.def.section;
5329 toff = h->root.u.def.value;
5330 }
5331 else
5332 continue;
5333
5334 sym_type = h->type;
5335 }
5336
5337 /* If the branch and target are in the same section, you have
5338 no hope of adding stubs. We'll error out later should the
5339 branch overflow. */
5340 if (tsec == isec)
5341 continue;
5342
5343 /* There probably isn't any reason to handle symbols in
5344 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5345 attribute for a code section, and we are only looking at
5346 branches. However, implement it correctly here as a
5347 reference for other target relax_section functions. */
5348 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5349 {
5350 /* At this stage in linking, no SEC_MERGE symbol has been
5351 adjusted, so all references to such symbols need to be
5352 passed through _bfd_merged_section_offset. (Later, in
5353 relocate_section, all SEC_MERGE symbols *except* for
5354 section symbols have been adjusted.)
5355
5356 gas may reduce relocations against symbols in SEC_MERGE
5357 sections to a relocation against the section symbol when
5358 the original addend was zero. When the reloc is against
5359 a section symbol we should include the addend in the
5360 offset passed to _bfd_merged_section_offset, since the
5361 location of interest is the original symbol. On the
5362 other hand, an access to "sym+addend" where "sym" is not
5363 a section symbol should not include the addend; Such an
5364 access is presumed to be an offset from "sym"; The
5365 location of interest is just "sym". */
5366 if (sym_type == STT_SECTION)
5367 toff += irel->r_addend;
5368
5369 toff = _bfd_merged_section_offset (abfd, &tsec,
5370 elf_section_data (tsec)->sec_info,
5371 toff);
5372
5373 if (sym_type != STT_SECTION)
5374 toff += irel->r_addend;
5375 }
5376 /* PLTREL24 addends are special. */
5377 else if (r_type != R_PPC_PLTREL24)
5378 toff += irel->r_addend;
5379
5380 /* Attempted -shared link of non-pic code loses. */
5381 if (tsec->output_section == NULL)
5382 continue;
5383
5384 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5385
5386 roff = irel->r_offset;
5387 reladdr = isec->output_section->vma + isec->output_offset + roff;
5388
5389 /* If the branch is in range, no need to do anything. */
5390 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5391 continue;
5392
5393 /* Look for an existing fixup to this address. */
5394 for (f = fixups; f ; f = f->next)
5395 if (f->tsec == tsec && f->toff == toff)
5396 break;
5397
5398 if (f == NULL)
5399 {
5400 size_t size;
5401 unsigned long stub_rtype;
5402
5403 val = trampoff - roff;
5404 if (val >= max_branch_offset)
5405 /* Oh dear, we can't reach a trampoline. Don't try to add
5406 one. We'll report an error later. */
5407 continue;
5408
5409 if (link_info->shared)
5410 {
5411 size = 4 * ARRAY_SIZE (shared_stub_entry);
5412 insn_offset = 12;
5413 stub_rtype = R_PPC_RELAX32PC;
5414 }
5415 else
5416 {
5417 size = 4 * ARRAY_SIZE (stub_entry);
5418 insn_offset = 0;
5419 stub_rtype = R_PPC_RELAX32;
5420 }
5421
5422 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5423 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5424 abort ();
5425 if (tsec == htab->plt
5426 || tsec == htab->glink)
5427 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5428
5429 /* Hijack the old relocation. Since we need two
5430 relocations for this use a "composite" reloc. */
5431 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5432 stub_rtype);
5433 irel->r_offset = trampoff + insn_offset;
5434
5435 /* Record the fixup so we don't do it again this section. */
5436 f = bfd_malloc (sizeof (*f));
5437 f->next = fixups;
5438 f->tsec = tsec;
5439 f->toff = toff;
5440 f->trampoff = trampoff;
5441 fixups = f;
5442
5443 trampoff += size;
5444 }
5445 else
5446 {
5447 val = f->trampoff - roff;
5448 if (val >= max_branch_offset)
5449 continue;
5450
5451 /* Nop out the reloc, since we're finalizing things here. */
5452 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5453 }
5454
5455 /* Get the section contents. */
5456 if (contents == NULL)
5457 {
5458 /* Get cached copy if it exists. */
5459 if (elf_section_data (isec)->this_hdr.contents != NULL)
5460 contents = elf_section_data (isec)->this_hdr.contents;
5461 else
5462 {
5463 /* Go get them off disk. */
5464 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5465 goto error_return;
5466 }
5467 }
5468
5469 /* Fix up the existing branch to hit the trampoline. */
5470 hit_addr = contents + roff;
5471 switch (r_type)
5472 {
5473 case R_PPC_REL24:
5474 case R_PPC_LOCAL24PC:
5475 case R_PPC_PLTREL24:
5476 t0 = bfd_get_32 (abfd, hit_addr);
5477 t0 &= ~0x3fffffc;
5478 t0 |= val & 0x3fffffc;
5479 bfd_put_32 (abfd, t0, hit_addr);
5480 break;
5481
5482 case R_PPC_REL14:
5483 case R_PPC_REL14_BRTAKEN:
5484 case R_PPC_REL14_BRNTAKEN:
5485 t0 = bfd_get_32 (abfd, hit_addr);
5486 t0 &= ~0xfffc;
5487 t0 |= val & 0xfffc;
5488 bfd_put_32 (abfd, t0, hit_addr);
5489 break;
5490 }
5491 }
5492
5493 /* Write out the trampolines. */
5494 changed = fixups != NULL;
5495 if (fixups != NULL)
5496 {
5497 const int *stub;
5498 bfd_byte *dest;
5499 bfd_vma val;
5500 int i, size;
5501
5502 do
5503 {
5504 struct one_fixup *f = fixups;
5505 fixups = fixups->next;
5506 free (f);
5507 }
5508 while (fixups);
5509
5510 contents = bfd_realloc (contents, trampoff);
5511 if (contents == NULL)
5512 goto error_return;
5513
5514 isec->size = (isec->size + 3) & (bfd_vma) -4;
5515 /* Branch around the trampolines. */
5516 val = trampoff - isec->size + 0x48000000;
5517 dest = contents + isec->size;
5518 isec->size = trampoff;
5519 bfd_put_32 (abfd, val, dest);
5520 dest += 4;
5521
5522 if (link_info->shared)
5523 {
5524 stub = shared_stub_entry;
5525 size = ARRAY_SIZE (shared_stub_entry);
5526 }
5527 else
5528 {
5529 stub = stub_entry;
5530 size = ARRAY_SIZE (stub_entry);
5531 }
5532
5533 i = 0;
5534 while (dest < contents + trampoff)
5535 {
5536 bfd_put_32 (abfd, stub[i], dest);
5537 i++;
5538 if (i == size)
5539 i = 0;
5540 dest += 4;
5541 }
5542 BFD_ASSERT (i == 0);
5543 }
5544
5545 if (isymbuf != NULL
5546 && symtab_hdr->contents != (unsigned char *) isymbuf)
5547 {
5548 if (! link_info->keep_memory)
5549 free (isymbuf);
5550 else
5551 {
5552 /* Cache the symbols for elf_link_input_bfd. */
5553 symtab_hdr->contents = (unsigned char *) isymbuf;
5554 }
5555 }
5556
5557 if (contents != NULL
5558 && elf_section_data (isec)->this_hdr.contents != contents)
5559 {
5560 if (!changed && !link_info->keep_memory)
5561 free (contents);
5562 else
5563 {
5564 /* Cache the section contents for elf_link_input_bfd. */
5565 elf_section_data (isec)->this_hdr.contents = contents;
5566 }
5567 }
5568
5569 if (elf_section_data (isec)->relocs != internal_relocs)
5570 {
5571 if (!changed)
5572 free (internal_relocs);
5573 else
5574 elf_section_data (isec)->relocs = internal_relocs;
5575 }
5576
5577 *again = changed;
5578 return TRUE;
5579
5580 error_return:
5581 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5582 free (isymbuf);
5583 if (contents != NULL
5584 && elf_section_data (isec)->this_hdr.contents != contents)
5585 free (contents);
5586 if (internal_relocs != NULL
5587 && elf_section_data (isec)->relocs != internal_relocs)
5588 free (internal_relocs);
5589 return FALSE;
5590}
5591\f
5592/* What to do when ld finds relocations against symbols defined in
5593 discarded sections. */
5594
5595static unsigned int
5596ppc_elf_action_discarded (asection *sec)
5597{
5598 if (strcmp (".fixup", sec->name) == 0)
5599 return 0;
5600
5601 if (strcmp (".got2", sec->name) == 0)
5602 return 0;
5603
5604 return _bfd_elf_default_action_discarded (sec);
5605}
5606\f
5607/* Fill in the address for a pointer generated in a linker section. */
5608
5609static bfd_vma
5610elf_finish_pointer_linker_section (bfd *input_bfd,
5611 elf_linker_section_t *lsect,
5612 struct elf_link_hash_entry *h,
5613 bfd_vma relocation,
5614 const Elf_Internal_Rela *rel)
5615{
5616 elf_linker_section_pointers_t *linker_section_ptr;
5617
5618 BFD_ASSERT (lsect != NULL);
5619
5620 if (h != NULL)
5621 {
5622 /* Handle global symbol. */
5623 struct ppc_elf_link_hash_entry *eh;
5624
5625 eh = (struct ppc_elf_link_hash_entry *) h;
5626 BFD_ASSERT (eh->elf.def_regular);
5627 linker_section_ptr = eh->linker_section_pointer;
5628 }
5629 else
5630 {
5631 /* Handle local symbol. */
5632 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5633
5634 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5635 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5636 }
5637
5638 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5639 rel->r_addend,
5640 lsect);
5641 BFD_ASSERT (linker_section_ptr != NULL);
5642
5643 /* Offset will always be a multiple of four, so use the bottom bit
5644 as a "written" flag. */
5645 if ((linker_section_ptr->offset & 1) == 0)
5646 {
5647 bfd_put_32 (lsect->section->owner,
5648 relocation + linker_section_ptr->addend,
5649 lsect->section->contents + linker_section_ptr->offset);
5650 linker_section_ptr->offset += 1;
5651 }
5652
5653 relocation = (lsect->section->output_offset
5654 + linker_section_ptr->offset - 1
5655 - 0x8000);
5656
5657#ifdef DEBUG
5658 fprintf (stderr,
5659 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5660 lsect->name, (long) relocation, (long) relocation);
5661#endif
5662
5663 /* Subtract out the addend, because it will get added back in by the normal
5664 processing. */
5665 return relocation - linker_section_ptr->addend;
5666}
5667
5668/* The RELOCATE_SECTION function is called by the ELF backend linker
5669 to handle the relocations for a section.
5670
5671 The relocs are always passed as Rela structures; if the section
5672 actually uses Rel structures, the r_addend field will always be
5673 zero.
5674
5675 This function is responsible for adjust the section contents as
5676 necessary, and (if using Rela relocs and generating a
5677 relocatable output file) adjusting the reloc addend as
5678 necessary.
5679
5680 This function does not have to worry about setting the reloc
5681 address or the reloc symbol index.
5682
5683 LOCAL_SYMS is a pointer to the swapped in local symbols.
5684
5685 LOCAL_SECTIONS is an array giving the section in the input file
5686 corresponding to the st_shndx field of each local symbol.
5687
5688 The global hash table entry for the global symbols can be found
5689 via elf_sym_hashes (input_bfd).
5690
5691 When generating relocatable output, this function must handle
5692 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5693 going to be the section symbol corresponding to the output
5694 section, which means that the addend must be adjusted
5695 accordingly. */
5696
5697static bfd_boolean
5698ppc_elf_relocate_section (bfd *output_bfd,
5699 struct bfd_link_info *info,
5700 bfd *input_bfd,
5701 asection *input_section,
5702 bfd_byte *contents,
5703 Elf_Internal_Rela *relocs,
5704 Elf_Internal_Sym *local_syms,
5705 asection **local_sections)
5706{
5707 Elf_Internal_Shdr *symtab_hdr;
5708 struct elf_link_hash_entry **sym_hashes;
5709 struct ppc_elf_link_hash_table *htab;
5710 Elf_Internal_Rela *rel;
5711 Elf_Internal_Rela *relend;
5712 Elf_Internal_Rela outrel;
5713 bfd_byte *loc;
5714 asection *got2, *sreloc = NULL;
5715 bfd_vma *local_got_offsets;
5716 bfd_boolean ret = TRUE;
5717 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5718
5719#ifdef DEBUG
5720 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5721 "%ld relocations%s",
5722 input_bfd, input_section,
5723 (long) input_section->reloc_count,
5724 (info->relocatable) ? " (relocatable)" : "");
5725#endif
5726
5727 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5728
5729 /* Initialize howto table if not already done. */
5730 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5731 ppc_elf_howto_init ();
5732
5733 htab = ppc_elf_hash_table (info);
5734 local_got_offsets = elf_local_got_offsets (input_bfd);
5735 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5736 sym_hashes = elf_sym_hashes (input_bfd);
5737 rel = relocs;
5738 relend = relocs + input_section->reloc_count;
5739 for (; rel < relend; rel++)
5740 {
5741 enum elf_ppc_reloc_type r_type;
5742 bfd_vma addend;
5743 bfd_reloc_status_type r;
5744 Elf_Internal_Sym *sym;
5745 asection *sec;
5746 struct elf_link_hash_entry *h;
5747 const char *sym_name;
5748 reloc_howto_type *howto;
5749 unsigned long r_symndx;
5750 bfd_vma relocation;
5751 bfd_vma branch_bit, insn, from;
5752 bfd_boolean unresolved_reloc;
5753 bfd_boolean warned;
5754 unsigned int tls_type, tls_mask, tls_gd;
5755
5756 r_type = ELF32_R_TYPE (rel->r_info);
5757 sym = NULL;
5758 sec = NULL;
5759 h = NULL;
5760 unresolved_reloc = FALSE;
5761 warned = FALSE;
5762 r_symndx = ELF32_R_SYM (rel->r_info);
5763
5764 if (r_symndx < symtab_hdr->sh_info)
5765 {
5766 sym = local_syms + r_symndx;
5767 sec = local_sections[r_symndx];
5768 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5769
5770 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5771 }
5772 else
5773 {
5774 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5775 r_symndx, symtab_hdr, sym_hashes,
5776 h, sec, relocation,
5777 unresolved_reloc, warned);
5778
5779 sym_name = h->root.root.string;
5780 }
5781
5782 if (sec != NULL && elf_discarded_section (sec))
5783 {
5784 /* For relocs against symbols from removed linkonce sections,
5785 or sections discarded by a linker script, we just want the
5786 section contents zeroed. Avoid any special processing. */
5787 howto = NULL;
5788 if (r_type < R_PPC_max)
5789 howto = ppc_elf_howto_table[r_type];
5790 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5791 rel->r_info = 0;
5792 rel->r_addend = 0;
5793 continue;
5794 }
5795
5796 if (info->relocatable)
5797 {
5798 if (got2 != NULL
5799 && r_type == R_PPC_PLTREL24
5800 && rel->r_addend >= 32768)
5801 {
5802 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5803 addend specifies the GOT pointer offset within .got2. */
5804 rel->r_addend += got2->output_offset;
5805 }
5806 continue;
5807 }
5808
5809 /* TLS optimizations. Replace instruction sequences and relocs
5810 based on information we collected in tls_optimize. We edit
5811 RELOCS so that --emit-relocs will output something sensible
5812 for the final instruction stream. */
5813 tls_mask = 0;
5814 tls_gd = 0;
5815 if (IS_PPC_TLS_RELOC (r_type))
5816 {
5817 if (h != NULL)
5818 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5819 else if (local_got_offsets != NULL)
5820 {
5821 char *lgot_masks;
5822 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5823 tls_mask = lgot_masks[r_symndx];
5824 }
5825 }
5826
5827 /* Ensure reloc mapping code below stays sane. */
5828 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5829 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5830 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5831 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5832 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5833 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5834 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5835 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5836 abort ();
5837 switch (r_type)
5838 {
5839 default:
5840 break;
5841
5842 case R_PPC_GOT_TPREL16:
5843 case R_PPC_GOT_TPREL16_LO:
5844 if (tls_mask != 0
5845 && (tls_mask & TLS_TPREL) == 0)
5846 {
5847 bfd_vma insn;
5848 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5849 insn &= 31 << 21;
5850 insn |= 0x3c020000; /* addis 0,2,0 */
5851 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5852 r_type = R_PPC_TPREL16_HA;
5853 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5854 }
5855 break;
5856
5857 case R_PPC_TLS:
5858 if (tls_mask != 0
5859 && (tls_mask & TLS_TPREL) == 0)
5860 {
5861 bfd_vma insn, rtra;
5862 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5863 if ((insn & ((31 << 26) | (31 << 11)))
5864 == ((31 << 26) | (2 << 11)))
5865 rtra = insn & ((1 << 26) - (1 << 16));
5866 else if ((insn & ((31 << 26) | (31 << 16)))
5867 == ((31 << 26) | (2 << 16)))
5868 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5869 else
5870 abort ();
5871 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5872 /* add -> addi. */
5873 insn = 14 << 26;
5874 else if ((insn & (31 << 1)) == 23 << 1
5875 && ((insn & (31 << 6)) < 14 << 6
5876 || ((insn & (31 << 6)) >= 16 << 6
5877 && (insn & (31 << 6)) < 24 << 6)))
5878 /* load and store indexed -> dform. */
5879 insn = (32 | ((insn >> 6) & 31)) << 26;
5880 else if ((insn & (31 << 1)) == 21 << 1
5881 && (insn & (0x1a << 6)) == 0)
5882 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5883 insn = (((58 | ((insn >> 6) & 4)) << 26)
5884 | ((insn >> 6) & 1));
5885 else if ((insn & (31 << 1)) == 21 << 1
5886 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5887 /* lwax -> lwa. */
5888 insn = (58 << 26) | 2;
5889 else
5890 abort ();
5891 insn |= rtra;
5892 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5893 r_type = R_PPC_TPREL16_LO;
5894 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5895
5896 /* Was PPC_TLS which sits on insn boundary, now
5897 PPC_TPREL16_LO which is at low-order half-word. */
5898 rel->r_offset += d_offset;
5899 }
5900 break;
5901
5902 case R_PPC_GOT_TLSGD16_HI:
5903 case R_PPC_GOT_TLSGD16_HA:
5904 tls_gd = TLS_TPRELGD;
5905 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5906 goto tls_gdld_hi;
5907 break;
5908
5909 case R_PPC_GOT_TLSLD16_HI:
5910 case R_PPC_GOT_TLSLD16_HA:
5911 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5912 {
5913 tls_gdld_hi:
5914 if ((tls_mask & tls_gd) != 0)
5915 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5916 + R_PPC_GOT_TPREL16);
5917 else
5918 {
5919 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5920 rel->r_offset -= d_offset;
5921 r_type = R_PPC_NONE;
5922 }
5923 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5924 }
5925 break;
5926
5927 case R_PPC_GOT_TLSGD16:
5928 case R_PPC_GOT_TLSGD16_LO:
5929 tls_gd = TLS_TPRELGD;
5930 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5931 goto tls_get_addr_check;
5932 break;
5933
5934 case R_PPC_GOT_TLSLD16:
5935 case R_PPC_GOT_TLSLD16_LO:
5936 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5937 {
5938 tls_get_addr_check:
5939 if (rel + 1 < relend)
5940 {
5941 enum elf_ppc_reloc_type r_type2;
5942 unsigned long r_symndx2;
5943 struct elf_link_hash_entry *h2;
5944 bfd_vma insn1, insn2;
5945 bfd_vma offset;
5946
5947 /* The next instruction should be a call to
5948 __tls_get_addr. Peek at the reloc to be sure. */
5949 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5950 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5951 if (r_symndx2 < symtab_hdr->sh_info
5952 || (r_type2 != R_PPC_REL14
5953 && r_type2 != R_PPC_REL14_BRTAKEN
5954 && r_type2 != R_PPC_REL14_BRNTAKEN
5955 && r_type2 != R_PPC_REL24
5956 && r_type2 != R_PPC_PLTREL24))
5957 break;
5958
5959 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5960 while (h2->root.type == bfd_link_hash_indirect
5961 || h2->root.type == bfd_link_hash_warning)
5962 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5963 if (h2 == NULL || h2 != htab->tls_get_addr)
5964 break;
5965
5966 /* OK, it checks out. Replace the call. */
5967 offset = rel[1].r_offset;
5968 insn1 = bfd_get_32 (output_bfd,
5969 contents + rel->r_offset - d_offset);
5970 if ((tls_mask & tls_gd) != 0)
5971 {
5972 /* IE */
5973 insn1 &= (1 << 26) - 1;
5974 insn1 |= 32 << 26; /* lwz */
5975 insn2 = 0x7c631214; /* add 3,3,2 */
5976 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5977 rel[1].r_addend = 0;
5978 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5979 + R_PPC_GOT_TPREL16);
5980 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5981 }
5982 else
5983 {
5984 /* LE */
5985 insn1 = 0x3c620000; /* addis 3,2,0 */
5986 insn2 = 0x38630000; /* addi 3,3,0 */
5987 if (tls_gd == 0)
5988 {
5989 /* Was an LD reloc. */
5990 r_symndx = 0;
5991 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5992 }
5993 r_type = R_PPC_TPREL16_HA;
5994 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5995 rel[1].r_info = ELF32_R_INFO (r_symndx,
5996 R_PPC_TPREL16_LO);
5997 rel[1].r_offset += d_offset;
5998 rel[1].r_addend = rel->r_addend;
5999 }
6000 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - d_offset);
6001 bfd_put_32 (output_bfd, insn2, contents + offset);
6002 if (tls_gd == 0)
6003 {
6004 /* We changed the symbol on an LD reloc. Start over
6005 in order to get h, sym, sec etc. right. */
6006 rel--;
6007 continue;
6008 }
6009 }
6010 }
6011 break;
6012 }
6013
6014 /* Handle other relocations that tweak non-addend part of insn. */
6015 branch_bit = 0;
6016 switch (r_type)
6017 {
6018 default:
6019 break;
6020
6021 /* Branch taken prediction relocations. */
6022 case R_PPC_ADDR14_BRTAKEN:
6023 case R_PPC_REL14_BRTAKEN:
6024 branch_bit = BRANCH_PREDICT_BIT;
6025 /* Fall thru */
6026
6027 /* Branch not taken prediction relocations. */
6028 case R_PPC_ADDR14_BRNTAKEN:
6029 case R_PPC_REL14_BRNTAKEN:
6030 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6031 insn &= ~BRANCH_PREDICT_BIT;
6032 insn |= branch_bit;
6033
6034 from = (rel->r_offset
6035 + input_section->output_offset
6036 + input_section->output_section->vma);
6037
6038 /* Invert 'y' bit if not the default. */
6039 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6040 insn ^= BRANCH_PREDICT_BIT;
6041
6042 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6043 break;
6044 }
6045
6046 addend = rel->r_addend;
6047 tls_type = 0;
6048 howto = NULL;
6049 if (r_type < R_PPC_max)
6050 howto = ppc_elf_howto_table[r_type];
6051 switch (r_type)
6052 {
6053 default:
6054 (*_bfd_error_handler)
6055 (_("%B: unknown relocation type %d for symbol %s"),
6056 input_bfd, (int) r_type, sym_name);
6057
6058 bfd_set_error (bfd_error_bad_value);
6059 ret = FALSE;
6060 continue;
6061
6062 case R_PPC_NONE:
6063 case R_PPC_TLS:
6064 case R_PPC_EMB_MRKREF:
6065 case R_PPC_GNU_VTINHERIT:
6066 case R_PPC_GNU_VTENTRY:
6067 continue;
6068
6069 /* GOT16 relocations. Like an ADDR16 using the symbol's
6070 address in the GOT as relocation value instead of the
6071 symbol's value itself. Also, create a GOT entry for the
6072 symbol and put the symbol value there. */
6073 case R_PPC_GOT_TLSGD16:
6074 case R_PPC_GOT_TLSGD16_LO:
6075 case R_PPC_GOT_TLSGD16_HI:
6076 case R_PPC_GOT_TLSGD16_HA:
6077 tls_type = TLS_TLS | TLS_GD;
6078 goto dogot;
6079
6080 case R_PPC_GOT_TLSLD16:
6081 case R_PPC_GOT_TLSLD16_LO:
6082 case R_PPC_GOT_TLSLD16_HI:
6083 case R_PPC_GOT_TLSLD16_HA:
6084 tls_type = TLS_TLS | TLS_LD;
6085 goto dogot;
6086
6087 case R_PPC_GOT_TPREL16:
6088 case R_PPC_GOT_TPREL16_LO:
6089 case R_PPC_GOT_TPREL16_HI:
6090 case R_PPC_GOT_TPREL16_HA:
6091 tls_type = TLS_TLS | TLS_TPREL;
6092 goto dogot;
6093
6094 case R_PPC_GOT_DTPREL16:
6095 case R_PPC_GOT_DTPREL16_LO:
6096 case R_PPC_GOT_DTPREL16_HI:
6097 case R_PPC_GOT_DTPREL16_HA:
6098 tls_type = TLS_TLS | TLS_DTPREL;
6099 goto dogot;
6100
6101 case R_PPC_GOT16:
6102 case R_PPC_GOT16_LO:
6103 case R_PPC_GOT16_HI:
6104 case R_PPC_GOT16_HA:
6105 dogot:
6106 {
6107 /* Relocation is to the entry for this symbol in the global
6108 offset table. */
6109 bfd_vma off;
6110 bfd_vma *offp;
6111 unsigned long indx;
6112
6113 if (htab->got == NULL)
6114 abort ();
6115
6116 indx = 0;
6117 if (tls_type == (TLS_TLS | TLS_LD)
6118 && (h == NULL
6119 || !h->def_dynamic))
6120 offp = &htab->tlsld_got.offset;
6121 else if (h != NULL)
6122 {
6123 bfd_boolean dyn;
6124 dyn = htab->elf.dynamic_sections_created;
6125 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6126 || (info->shared
6127 && SYMBOL_REFERENCES_LOCAL (info, h)))
6128 /* This is actually a static link, or it is a
6129 -Bsymbolic link and the symbol is defined
6130 locally, or the symbol was forced to be local
6131 because of a version file. */
6132 ;
6133 else
6134 {
6135 indx = h->dynindx;
6136 unresolved_reloc = FALSE;
6137 }
6138 offp = &h->got.offset;
6139 }
6140 else
6141 {
6142 if (local_got_offsets == NULL)
6143 abort ();
6144 offp = &local_got_offsets[r_symndx];
6145 }
6146
6147 /* The offset must always be a multiple of 4. We use the
6148 least significant bit to record whether we have already
6149 processed this entry. */
6150 off = *offp;
6151 if ((off & 1) != 0)
6152 off &= ~1;
6153 else
6154 {
6155 unsigned int tls_m = (tls_mask
6156 & (TLS_LD | TLS_GD | TLS_DTPREL
6157 | TLS_TPREL | TLS_TPRELGD));
6158
6159 if (offp == &htab->tlsld_got.offset)
6160 tls_m = TLS_LD;
6161 else if (h == NULL
6162 || !h->def_dynamic)
6163 tls_m &= ~TLS_LD;
6164
6165 /* We might have multiple got entries for this sym.
6166 Initialize them all. */
6167 do
6168 {
6169 int tls_ty = 0;
6170
6171 if ((tls_m & TLS_LD) != 0)
6172 {
6173 tls_ty = TLS_TLS | TLS_LD;
6174 tls_m &= ~TLS_LD;
6175 }
6176 else if ((tls_m & TLS_GD) != 0)
6177 {
6178 tls_ty = TLS_TLS | TLS_GD;
6179 tls_m &= ~TLS_GD;
6180 }
6181 else if ((tls_m & TLS_DTPREL) != 0)
6182 {
6183 tls_ty = TLS_TLS | TLS_DTPREL;
6184 tls_m &= ~TLS_DTPREL;
6185 }
6186 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6187 {
6188 tls_ty = TLS_TLS | TLS_TPREL;
6189 tls_m = 0;
6190 }
6191
6192 /* Generate relocs for the dynamic linker. */
6193 if ((info->shared || indx != 0)
6194 && (h == NULL
6195 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6196 || h->root.type != bfd_link_hash_undefweak))
6197 {
6198 outrel.r_offset = (htab->got->output_section->vma
6199 + htab->got->output_offset
6200 + off);
6201 outrel.r_addend = 0;
6202 if (tls_ty & (TLS_LD | TLS_GD))
6203 {
6204 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6205 if (tls_ty == (TLS_TLS | TLS_GD))
6206 {
6207 loc = htab->relgot->contents;
6208 loc += (htab->relgot->reloc_count++
6209 * sizeof (Elf32_External_Rela));
6210 bfd_elf32_swap_reloca_out (output_bfd,
6211 &outrel, loc);
6212 outrel.r_offset += 4;
6213 outrel.r_info
6214 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6215 }
6216 }
6217 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6218 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6219 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6220 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6221 else if (indx == 0)
6222 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6223 else
6224 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6225 if (indx == 0)
6226 {
6227 outrel.r_addend += relocation;
6228 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6229 outrel.r_addend -= htab->elf.tls_sec->vma;
6230 }
6231 loc = htab->relgot->contents;
6232 loc += (htab->relgot->reloc_count++
6233 * sizeof (Elf32_External_Rela));
6234 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6235 }
6236
6237 /* Init the .got section contents if we're not
6238 emitting a reloc. */
6239 else
6240 {
6241 bfd_vma value = relocation;
6242
6243 if (tls_ty == (TLS_TLS | TLS_LD))
6244 value = 1;
6245 else if (tls_ty != 0)
6246 {
6247 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6248 if (tls_ty == (TLS_TLS | TLS_TPREL))
6249 value += DTP_OFFSET - TP_OFFSET;
6250
6251 if (tls_ty == (TLS_TLS | TLS_GD))
6252 {
6253 bfd_put_32 (output_bfd, value,
6254 htab->got->contents + off + 4);
6255 value = 1;
6256 }
6257 }
6258 bfd_put_32 (output_bfd, value,
6259 htab->got->contents + off);
6260 }
6261
6262 off += 4;
6263 if (tls_ty & (TLS_LD | TLS_GD))
6264 off += 4;
6265 }
6266 while (tls_m != 0);
6267
6268 off = *offp;
6269 *offp = off | 1;
6270 }
6271
6272 if (off >= (bfd_vma) -2)
6273 abort ();
6274
6275 if ((tls_type & TLS_TLS) != 0)
6276 {
6277 if (tls_type != (TLS_TLS | TLS_LD))
6278 {
6279 if ((tls_mask & TLS_LD) != 0
6280 && !(h == NULL
6281 || !h->def_dynamic))
6282 off += 8;
6283 if (tls_type != (TLS_TLS | TLS_GD))
6284 {
6285 if ((tls_mask & TLS_GD) != 0)
6286 off += 8;
6287 if (tls_type != (TLS_TLS | TLS_DTPREL))
6288 {
6289 if ((tls_mask & TLS_DTPREL) != 0)
6290 off += 4;
6291 }
6292 }
6293 }
6294 }
6295
6296 relocation = htab->got->output_offset + off;
6297 relocation -= htab->elf.hgot->root.u.def.value;
6298
6299 /* Addends on got relocations don't make much sense.
6300 x+off@got is actually x@got+off, and since the got is
6301 generated by a hash table traversal, the value in the
6302 got at entry m+n bears little relation to the entry m. */
6303 if (addend != 0)
6304 (*_bfd_error_handler)
6305 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6306 input_bfd,
6307 input_section,
6308 (long) rel->r_offset,
6309 howto->name,
6310 sym_name);
6311 }
6312 break;
6313
6314 /* Relocations that need no special processing. */
6315 case R_PPC_LOCAL24PC:
6316 /* It makes no sense to point a local relocation
6317 at a symbol not in this object. */
6318 if (unresolved_reloc)
6319 {
6320 if (! (*info->callbacks->undefined_symbol) (info,
6321 h->root.root.string,
6322 input_bfd,
6323 input_section,
6324 rel->r_offset,
6325 TRUE))
6326 return FALSE;
6327 continue;
6328 }
6329 break;
6330
6331 case R_PPC_DTPREL16:
6332 case R_PPC_DTPREL16_LO:
6333 case R_PPC_DTPREL16_HI:
6334 case R_PPC_DTPREL16_HA:
6335 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6336 break;
6337
6338 /* Relocations that may need to be propagated if this is a shared
6339 object. */
6340 case R_PPC_TPREL16:
6341 case R_PPC_TPREL16_LO:
6342 case R_PPC_TPREL16_HI:
6343 case R_PPC_TPREL16_HA:
6344 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6345 /* The TPREL16 relocs shouldn't really be used in shared
6346 libs as they will result in DT_TEXTREL being set, but
6347 support them anyway. */
6348 goto dodyn;
6349
6350 case R_PPC_TPREL32:
6351 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6352 goto dodyn;
6353
6354 case R_PPC_DTPREL32:
6355 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6356 goto dodyn;
6357
6358 case R_PPC_DTPMOD32:
6359 relocation = 1;
6360 addend = 0;
6361 goto dodyn;
6362
6363 case R_PPC_REL16:
6364 case R_PPC_REL16_LO:
6365 case R_PPC_REL16_HI:
6366 case R_PPC_REL16_HA:
6367 break;
6368
6369 case R_PPC_REL24:
6370 case R_PPC_REL32:
6371 case R_PPC_REL14:
6372 case R_PPC_REL14_BRTAKEN:
6373 case R_PPC_REL14_BRNTAKEN:
6374 /* If these relocations are not to a named symbol, they can be
6375 handled right here, no need to bother the dynamic linker. */
6376 if (SYMBOL_REFERENCES_LOCAL (info, h)
6377 || h == htab->elf.hgot)
6378 break;
6379 /* fall through */
6380
6381 /* Relocations that always need to be propagated if this is a shared
6382 object. */
6383 case R_PPC_ADDR32:
6384 case R_PPC_ADDR24:
6385 case R_PPC_ADDR16:
6386 case R_PPC_ADDR16_LO:
6387 case R_PPC_ADDR16_HI:
6388 case R_PPC_ADDR16_HA:
6389 case R_PPC_ADDR14:
6390 case R_PPC_ADDR14_BRTAKEN:
6391 case R_PPC_ADDR14_BRNTAKEN:
6392 case R_PPC_UADDR32:
6393 case R_PPC_UADDR16:
6394 dodyn:
6395 if ((input_section->flags & SEC_ALLOC) == 0)
6396 break;
6397 /* Fall thru. */
6398
6399 if ((info->shared
6400 && (h == NULL
6401 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6402 || h->root.type != bfd_link_hash_undefweak)
6403 && (MUST_BE_DYN_RELOC (r_type)
6404 || !SYMBOL_CALLS_LOCAL (info, h)))
6405 || (ELIMINATE_COPY_RELOCS
6406 && !info->shared
6407 && h != NULL
6408 && h->dynindx != -1
6409 && !h->non_got_ref
6410 && h->def_dynamic
6411 && !h->def_regular))
6412 {
6413 int skip;
6414
6415#ifdef DEBUG
6416 fprintf (stderr, "ppc_elf_relocate_section needs to "
6417 "create relocation for %s\n",
6418 (h && h->root.root.string
6419 ? h->root.root.string : "<unknown>"));
6420#endif
6421
6422 /* When generating a shared object, these relocations
6423 are copied into the output file to be resolved at run
6424 time. */
6425 if (sreloc == NULL)
6426 {
6427 const char *name;
6428
6429 name = (bfd_elf_string_from_elf_section
6430 (input_bfd,
6431 elf_elfheader (input_bfd)->e_shstrndx,
6432 elf_section_data (input_section)->rel_hdr.sh_name));
6433 if (name == NULL)
6434 return FALSE;
6435
6436 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6437 && strcmp (bfd_get_section_name (input_bfd,
6438 input_section),
6439 name + 5) == 0);
6440
6441 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6442 BFD_ASSERT (sreloc != NULL);
6443 }
6444
6445 skip = 0;
6446
6447 outrel.r_offset =
6448 _bfd_elf_section_offset (output_bfd, info, input_section,
6449 rel->r_offset);
6450 if (outrel.r_offset == (bfd_vma) -1
6451 || outrel.r_offset == (bfd_vma) -2)
6452 skip = (int) outrel.r_offset;
6453 outrel.r_offset += (input_section->output_section->vma
6454 + input_section->output_offset);
6455
6456 if (skip)
6457 memset (&outrel, 0, sizeof outrel);
6458 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6459 {
6460 unresolved_reloc = FALSE;
6461 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6462 outrel.r_addend = rel->r_addend;
6463 }
6464 else
6465 {
6466 outrel.r_addend = relocation + rel->r_addend;
6467
6468 if (r_type == R_PPC_ADDR32)
6469 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6470 else
6471 {
6472 long indx;
6473
6474 if (bfd_is_abs_section (sec))
6475 indx = 0;
6476 else if (sec == NULL || sec->owner == NULL)
6477 {
6478 bfd_set_error (bfd_error_bad_value);
6479 return FALSE;
6480 }
6481 else
6482 {
6483 asection *osec;
6484
6485 /* We are turning this relocation into one
6486 against a section symbol. It would be
6487 proper to subtract the symbol's value,
6488 osec->vma, from the emitted reloc addend,
6489 but ld.so expects buggy relocs. */
6490 osec = sec->output_section;
6491 indx = elf_section_data (osec)->dynindx;
6492 if (indx == 0)
6493 {
6494 osec = htab->elf.text_index_section;
6495 indx = elf_section_data (osec)->dynindx;
6496 }
6497 BFD_ASSERT (indx != 0);
6498#ifdef DEBUG
6499 if (indx == 0)
6500 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6501 indx, osec->name, osec->flags,
6502 h->root.root.string);
6503#endif
6504 }
6505
6506 outrel.r_info = ELF32_R_INFO (indx, r_type);
6507 }
6508 }
6509
6510 loc = sreloc->contents;
6511 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6512 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6513
6514 if (skip == -1)
6515 continue;
6516
6517 /* This reloc will be computed at runtime. We clear the memory
6518 so that it contains predictable value. */
6519 if (! skip
6520 && ((input_section->flags & SEC_ALLOC) != 0
6521 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6522 {
6523 relocation = howto->pc_relative ? outrel.r_offset : 0;
6524 addend = 0;
6525 break;
6526 }
6527 }
6528 break;
6529
6530 case R_PPC_RELAX32PC_PLT:
6531 case R_PPC_RELAX32_PLT:
6532 {
6533 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6534
6535 if (htab->plt_type == PLT_NEW)
6536 relocation = (htab->glink->output_section->vma
6537 + htab->glink->output_offset
6538 + ent->glink_offset);
6539 else
6540 relocation = (htab->plt->output_section->vma
6541 + htab->plt->output_offset
6542 + ent->plt.offset);
6543 addend = 0;
6544 }
6545 if (r_type == R_PPC_RELAX32_PLT)
6546 goto relax32;
6547 /* Fall thru */
6548
6549 case R_PPC_RELAX32PC:
6550 relocation -= (input_section->output_section->vma
6551 + input_section->output_offset
6552 + rel->r_offset - 4);
6553 /* Fall thru */
6554
6555 case R_PPC_RELAX32:
6556 relax32:
6557 {
6558 unsigned long t0;
6559 unsigned long t1;
6560
6561 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6562 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6563
6564 /* We're clearing the bits for R_PPC_ADDR16_HA
6565 and R_PPC_ADDR16_LO here. */
6566 t0 &= ~0xffff;
6567 t1 &= ~0xffff;
6568
6569 /* t0 is HA, t1 is LO */
6570 relocation += addend;
6571 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6572 t1 |= relocation & 0xffff;
6573
6574 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6575 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6576 }
6577 continue;
6578
6579 /* Indirect .sdata relocation. */
6580 case R_PPC_EMB_SDAI16:
6581 BFD_ASSERT (htab->sdata[0].section != NULL);
6582 relocation
6583 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6584 h, relocation, rel);
6585 break;
6586
6587 /* Indirect .sdata2 relocation. */
6588 case R_PPC_EMB_SDA2I16:
6589 BFD_ASSERT (htab->sdata[1].section != NULL);
6590 relocation
6591 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6592 h, relocation, rel);
6593 break;
6594
6595 /* Handle the TOC16 reloc. We want to use the offset within the .got
6596 section, not the actual VMA. This is appropriate when generating
6597 an embedded ELF object, for which the .got section acts like the
6598 AIX .toc section. */
6599 case R_PPC_TOC16: /* phony GOT16 relocations */
6600 BFD_ASSERT (sec != NULL);
6601 BFD_ASSERT (bfd_is_und_section (sec)
6602 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6603 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6604
6605 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6606 break;
6607
6608 case R_PPC_PLTREL24:
6609 /* Relocation is to the entry for this symbol in the
6610 procedure linkage table. */
6611 {
6612 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6613
6614 addend = 0;
6615 if (ent == NULL
6616 || htab->plt == NULL)
6617 {
6618 /* We didn't make a PLT entry for this symbol. This
6619 happens when statically linking PIC code, or when
6620 using -Bsymbolic. */
6621 break;
6622 }
6623
6624 unresolved_reloc = FALSE;
6625 if (htab->plt_type == PLT_NEW)
6626 relocation = (htab->glink->output_section->vma
6627 + htab->glink->output_offset
6628 + ent->glink_offset);
6629 else
6630 relocation = (htab->plt->output_section->vma
6631 + htab->plt->output_offset
6632 + ent->plt.offset);
6633 }
6634 break;
6635
6636 /* Relocate against _SDA_BASE_. */
6637 case R_PPC_SDAREL16:
6638 {
6639 const char *name;
6640 struct elf_link_hash_entry *sh;
6641
6642 BFD_ASSERT (sec != NULL);
6643 name = bfd_get_section_name (abfd, sec->output_section);
6644 if (! ((CONST_STRNEQ (name, ".sdata")
6645 && (name[6] == 0 || name[6] == '.'))
6646 || (CONST_STRNEQ (name, ".sbss")
6647 && (name[5] == 0 || name[5] == '.'))))
6648 {
6649 (*_bfd_error_handler)
6650 (_("%B: the target (%s) of a %s relocation is "
6651 "in the wrong output section (%s)"),
6652 input_bfd,
6653 sym_name,
6654 howto->name,
6655 name);
6656 }
6657 sh = htab->sdata[0].sym;
6658 addend -= (sh->root.u.def.value
6659 + sh->root.u.def.section->output_offset
6660 + sh->root.u.def.section->output_section->vma);
6661 }
6662 break;
6663
6664 /* Relocate against _SDA2_BASE_. */
6665 case R_PPC_EMB_SDA2REL:
6666 {
6667 const char *name;
6668 struct elf_link_hash_entry *sh;
6669
6670 BFD_ASSERT (sec != NULL);
6671 name = bfd_get_section_name (abfd, sec->output_section);
6672 if (! (CONST_STRNEQ (name, ".sdata2")
6673 || CONST_STRNEQ (name, ".sbss2")))
6674 {
6675 (*_bfd_error_handler)
6676 (_("%B: the target (%s) of a %s relocation is "
6677 "in the wrong output section (%s)"),
6678 input_bfd,
6679 sym_name,
6680 howto->name,
6681 name);
6682
6683 bfd_set_error (bfd_error_bad_value);
6684 ret = FALSE;
6685 continue;
6686 }
6687 sh = htab->sdata[1].sym;
6688 addend -= (sh->root.u.def.value
6689 + sh->root.u.def.section->output_offset
6690 + sh->root.u.def.section->output_section->vma);
6691 }
6692 break;
6693
6694 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6695 case R_PPC_EMB_SDA21:
6696 case R_PPC_EMB_RELSDA:
6697 {
6698 const char *name;
6699 int reg;
6700 struct elf_link_hash_entry *sh;
6701
6702 BFD_ASSERT (sec != NULL);
6703 name = bfd_get_section_name (abfd, sec->output_section);
6704 if (((CONST_STRNEQ (name, ".sdata")
6705 && (name[6] == 0 || name[6] == '.'))
6706 || (CONST_STRNEQ (name, ".sbss")
6707 && (name[5] == 0 || name[5] == '.'))))
6708 {
6709 reg = 13;
6710 sh = htab->sdata[0].sym;
6711 addend -= (sh->root.u.def.value
6712 + sh->root.u.def.section->output_offset
6713 + sh->root.u.def.section->output_section->vma);
6714 }
6715
6716 else if (CONST_STRNEQ (name, ".sdata2")
6717 || CONST_STRNEQ (name, ".sbss2"))
6718 {
6719 reg = 2;
6720 sh = htab->sdata[1].sym;
6721 addend -= (sh->root.u.def.value
6722 + sh->root.u.def.section->output_offset
6723 + sh->root.u.def.section->output_section->vma);
6724 }
6725
6726 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6727 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6728 {
6729 reg = 0;
6730 }
6731
6732 else
6733 {
6734 (*_bfd_error_handler)
6735 (_("%B: the target (%s) of a %s relocation is "
6736 "in the wrong output section (%s)"),
6737 input_bfd,
6738 sym_name,
6739 howto->name,
6740 name);
6741
6742 bfd_set_error (bfd_error_bad_value);
6743 ret = FALSE;
6744 continue;
6745 }
6746
6747 if (r_type == R_PPC_EMB_SDA21)
6748 { /* fill in register field */
6749 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6750 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6751 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6752 }
6753 }
6754 break;
6755
6756 /* Relocate against the beginning of the section. */
6757 case R_PPC_SECTOFF:
6758 case R_PPC_SECTOFF_LO:
6759 case R_PPC_SECTOFF_HI:
6760 case R_PPC_SECTOFF_HA:
6761 BFD_ASSERT (sec != NULL);
6762 addend -= sec->output_section->vma;
6763 break;
6764
6765 /* Negative relocations. */
6766 case R_PPC_EMB_NADDR32:
6767 case R_PPC_EMB_NADDR16:
6768 case R_PPC_EMB_NADDR16_LO:
6769 case R_PPC_EMB_NADDR16_HI:
6770 case R_PPC_EMB_NADDR16_HA:
6771 addend -= 2 * relocation;
6772 break;
6773
6774 case R_PPC_COPY:
6775 case R_PPC_GLOB_DAT:
6776 case R_PPC_JMP_SLOT:
6777 case R_PPC_RELATIVE:
6778 case R_PPC_PLT32:
6779 case R_PPC_PLTREL32:
6780 case R_PPC_PLT16_LO:
6781 case R_PPC_PLT16_HI:
6782 case R_PPC_PLT16_HA:
6783 case R_PPC_ADDR30:
6784 case R_PPC_EMB_RELSEC16:
6785 case R_PPC_EMB_RELST_LO:
6786 case R_PPC_EMB_RELST_HI:
6787 case R_PPC_EMB_RELST_HA:
6788 case R_PPC_EMB_BIT_FLD:
6789 (*_bfd_error_handler)
6790 (_("%B: relocation %s is not yet supported for symbol %s."),
6791 input_bfd,
6792 howto->name,
6793 sym_name);
6794
6795 bfd_set_error (bfd_error_invalid_operation);
6796 ret = FALSE;
6797 continue;
6798 }
6799
6800 /* Do any further special processing. */
6801 switch (r_type)
6802 {
6803 default:
6804 break;
6805
6806 case R_PPC_ADDR16_HA:
6807 case R_PPC_REL16_HA:
6808 case R_PPC_SECTOFF_HA:
6809 case R_PPC_TPREL16_HA:
6810 case R_PPC_DTPREL16_HA:
6811 case R_PPC_EMB_NADDR16_HA:
6812 case R_PPC_EMB_RELST_HA:
6813 /* It's just possible that this symbol is a weak symbol
6814 that's not actually defined anywhere. In that case,
6815 'sec' would be NULL, and we should leave the symbol
6816 alone (it will be set to zero elsewhere in the link). */
6817 if (sec == NULL)
6818 break;
6819 /* Fall thru */
6820
6821 case R_PPC_PLT16_HA:
6822 case R_PPC_GOT16_HA:
6823 case R_PPC_GOT_TLSGD16_HA:
6824 case R_PPC_GOT_TLSLD16_HA:
6825 case R_PPC_GOT_TPREL16_HA:
6826 case R_PPC_GOT_DTPREL16_HA:
6827 /* Add 0x10000 if sign bit in 0:15 is set.
6828 Bits 0:15 are not used. */
6829 addend += 0x8000;
6830 break;
6831 }
6832
6833#ifdef DEBUG
6834 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6835 "offset = %ld, addend = %ld\n",
6836 howto->name,
6837 (int) r_type,
6838 sym_name,
6839 r_symndx,
6840 (long) rel->r_offset,
6841 (long) addend);
6842#endif
6843
6844 if (unresolved_reloc
6845 && !((input_section->flags & SEC_DEBUGGING) != 0
6846 && h->def_dynamic))
6847 {
6848 (*_bfd_error_handler)
6849 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6850 input_bfd,
6851 input_section,
6852 (long) rel->r_offset,
6853 howto->name,
6854 sym_name);
6855 ret = FALSE;
6856 }
6857
6858 r = _bfd_final_link_relocate (howto,
6859 input_bfd,
6860 input_section,
6861 contents,
6862 rel->r_offset,
6863 relocation,
6864 addend);
6865
6866 if (r != bfd_reloc_ok)
6867 {
6868 if (r == bfd_reloc_overflow)
6869 {
6870 if (warned)
6871 continue;
6872 if (h != NULL
6873 && h->root.type == bfd_link_hash_undefweak
6874 && howto->pc_relative)
6875 {
6876 /* Assume this is a call protected by other code that
6877 detect the symbol is undefined. If this is the case,
6878 we can safely ignore the overflow. If not, the
6879 program is hosed anyway, and a little warning isn't
6880 going to help. */
6881
6882 continue;
6883 }
6884
6885 if (! (*info->callbacks->reloc_overflow) (info,
6886 (h ? &h->root : NULL),
6887 sym_name,
6888 howto->name,
6889 rel->r_addend,
6890 input_bfd,
6891 input_section,
6892 rel->r_offset))
6893 return FALSE;
6894 }
6895 else
6896 {
6897 (*_bfd_error_handler)
6898 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6899 input_bfd, input_section,
6900 (long) rel->r_offset, howto->name, sym_name, (int) r);
6901 ret = FALSE;
6902 }
6903 }
6904 }
6905
6906#ifdef DEBUG
6907 fprintf (stderr, "\n");
6908#endif
6909
6910 return ret;
6911}
6912\f
6913#define PPC_LO(v) ((v) & 0xffff)
6914#define PPC_HI(v) (((v) >> 16) & 0xffff)
6915#define PPC_HA(v) PPC_HI ((v) + 0x8000)
6916
6917/* Finish up dynamic symbol handling. We set the contents of various
6918 dynamic sections here. */
6919
6920static bfd_boolean
6921ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6922 struct bfd_link_info *info,
6923 struct elf_link_hash_entry *h,
6924 Elf_Internal_Sym *sym)
6925{
6926 struct ppc_elf_link_hash_table *htab;
6927 struct plt_entry *ent;
6928 bfd_boolean doneone;
6929
6930#ifdef DEBUG
6931 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6932 h->root.root.string);
6933#endif
6934
6935 htab = ppc_elf_hash_table (info);
6936 BFD_ASSERT (htab->elf.dynobj != NULL);
6937
6938 doneone = FALSE;
6939 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6940 if (ent->plt.offset != (bfd_vma) -1)
6941 {
6942 if (!doneone)
6943 {
6944 Elf_Internal_Rela rela;
6945 bfd_byte *loc;
6946 bfd_vma reloc_index;
6947
6948 if (htab->plt_type == PLT_NEW)
6949 reloc_index = ent->plt.offset / 4;
6950 else
6951 {
6952 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6953 / htab->plt_slot_size);
6954 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6955 && htab->plt_type == PLT_OLD)
6956 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6957 }
6958
6959 /* This symbol has an entry in the procedure linkage table.
6960 Set it up. */
6961 if (htab->plt_type == PLT_VXWORKS)
6962 {
6963 bfd_vma got_offset;
6964 const bfd_vma *plt_entry;
6965
6966 /* The first three entries in .got.plt are reserved. */
6967 got_offset = (reloc_index + 3) * 4;
6968
6969 /* Use the right PLT. */
6970 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6971 : ppc_elf_vxworks_plt_entry;
6972
6973 /* Fill in the .plt on VxWorks. */
6974 if (info->shared)
6975 {
6976 bfd_vma got_offset_hi = (got_offset >> 16)
6977 + ((got_offset & 0x8000) >> 15);
6978
6979 bfd_put_32 (output_bfd,
6980 plt_entry[0] | (got_offset_hi & 0xffff),
6981 htab->plt->contents + ent->plt.offset + 0);
6982 bfd_put_32 (output_bfd,
6983 plt_entry[1] | (got_offset & 0xffff),
6984 htab->plt->contents + ent->plt.offset + 4);
6985 }
6986 else
6987 {
6988 bfd_vma got_loc
6989 = (got_offset
6990 + htab->elf.hgot->root.u.def.value
6991 + htab->elf.hgot->root.u.def.section->output_offset
6992 + htab->elf.hgot->root.u.def.section->output_section->vma);
6993 bfd_vma got_loc_hi = (got_loc >> 16)
6994 + ((got_loc & 0x8000) >> 15);
6995
6996 bfd_put_32 (output_bfd,
6997 plt_entry[0] | (got_loc_hi & 0xffff),
6998 htab->plt->contents + ent->plt.offset + 0);
6999 bfd_put_32 (output_bfd,
7000 plt_entry[1] | (got_loc & 0xffff),
7001 htab->plt->contents + ent->plt.offset + 4);
7002 }
7003
7004 bfd_put_32 (output_bfd, plt_entry[2],
7005 htab->plt->contents + ent->plt.offset + 8);
7006 bfd_put_32 (output_bfd, plt_entry[3],
7007 htab->plt->contents + ent->plt.offset + 12);
7008
7009 /* This instruction is an immediate load. The value loaded is
7010 the byte offset of the R_PPC_JMP_SLOT relocation from the
7011 start of the .rela.plt section. The value is stored in the
7012 low-order 16 bits of the load instruction. */
7013 /* NOTE: It appears that this is now an index rather than a
7014 prescaled offset. */
7015 bfd_put_32 (output_bfd,
7016 plt_entry[4] | reloc_index,
7017 htab->plt->contents + ent->plt.offset + 16);
7018 /* This instruction is a PC-relative branch whose target is
7019 the start of the PLT section. The address of this branch
7020 instruction is 20 bytes beyond the start of this PLT entry.
7021 The address is encoded in bits 6-29, inclusive. The value
7022 stored is right-shifted by two bits, permitting a 26-bit
7023 offset. */
7024 bfd_put_32 (output_bfd,
7025 (plt_entry[5]
7026 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7027 htab->plt->contents + ent->plt.offset + 20);
7028 bfd_put_32 (output_bfd, plt_entry[6],
7029 htab->plt->contents + ent->plt.offset + 24);
7030 bfd_put_32 (output_bfd, plt_entry[7],
7031 htab->plt->contents + ent->plt.offset + 28);
7032
7033 /* Fill in the GOT entry corresponding to this PLT slot with
7034 the address immediately after the the "bctr" instruction
7035 in this PLT entry. */
7036 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7037 + htab->plt->output_offset
7038 + ent->plt.offset + 16),
7039 htab->sgotplt->contents + got_offset);
7040
7041 if (!info->shared)
7042 {
7043 /* Fill in a couple of entries in .rela.plt.unloaded. */
7044 loc = htab->srelplt2->contents
7045 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7046 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7047 * sizeof (Elf32_External_Rela));
7048
7049 /* Provide the @ha relocation for the first instruction. */
7050 rela.r_offset = (htab->plt->output_section->vma
7051 + htab->plt->output_offset
7052 + ent->plt.offset + 2);
7053 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7054 R_PPC_ADDR16_HA);
7055 rela.r_addend = got_offset;
7056 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7057 loc += sizeof (Elf32_External_Rela);
7058
7059 /* Provide the @l relocation for the second instruction. */
7060 rela.r_offset = (htab->plt->output_section->vma
7061 + htab->plt->output_offset
7062 + ent->plt.offset + 6);
7063 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7064 R_PPC_ADDR16_LO);
7065 rela.r_addend = got_offset;
7066 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7067 loc += sizeof (Elf32_External_Rela);
7068
7069 /* Provide a relocation for the GOT entry corresponding to this
7070 PLT slot. Point it at the middle of the .plt entry. */
7071 rela.r_offset = (htab->sgotplt->output_section->vma
7072 + htab->sgotplt->output_offset
7073 + got_offset);
7074 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7075 R_PPC_ADDR32);
7076 rela.r_addend = ent->plt.offset + 16;
7077 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7078 }
7079
7080 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7081 In particular, the offset for the relocation is not the
7082 address of the PLT entry for this function, as specified
7083 by the ABI. Instead, the offset is set to the address of
7084 the GOT slot for this function. See EABI 4.4.4.1. */
7085 rela.r_offset = (htab->sgotplt->output_section->vma
7086 + htab->sgotplt->output_offset
7087 + got_offset);
7088
7089 }
7090 else
7091 {
7092 rela.r_offset = (htab->plt->output_section->vma
7093 + htab->plt->output_offset
7094 + ent->plt.offset);
7095 if (htab->plt_type == PLT_OLD)
7096 {
7097 /* We don't need to fill in the .plt. The ppc dynamic
7098 linker will fill it in. */
7099 }
7100 else
7101 {
7102 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7103 + htab->glink->output_section->vma
7104 + htab->glink->output_offset);
7105 bfd_put_32 (output_bfd, val,
7106 htab->plt->contents + ent->plt.offset);
7107 }
7108 }
7109
7110 /* Fill in the entry in the .rela.plt section. */
7111 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7112 rela.r_addend = 0;
7113
7114 loc = (htab->relplt->contents
7115 + reloc_index * sizeof (Elf32_External_Rela));
7116 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7117
7118 if (!h->def_regular)
7119 {
7120 /* Mark the symbol as undefined, rather than as defined in
7121 the .plt section. Leave the value alone. */
7122 sym->st_shndx = SHN_UNDEF;
7123 /* If the symbol is weak, we do need to clear the value.
7124 Otherwise, the PLT entry would provide a definition for
7125 the symbol even if the symbol wasn't defined anywhere,
7126 and so the symbol would never be NULL. */
7127 if (!h->ref_regular_nonweak)
7128 sym->st_value = 0;
7129 }
7130 doneone = TRUE;
7131 }
7132
7133 if (htab->plt_type == PLT_NEW)
7134 {
7135 bfd_vma plt;
7136 unsigned char *p;
7137
7138 plt = (ent->plt.offset
7139 + htab->plt->output_section->vma
7140 + htab->plt->output_offset);
7141 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7142
7143 if (info->shared || info->pie)
7144 {
7145 bfd_vma got = 0;
7146
7147 if (ent->addend >= 32768)
7148 got = (ent->addend
7149 + ent->sec->output_section->vma
7150 + ent->sec->output_offset);
7151 else if (htab->elf.hgot != NULL)
7152 got = (htab->elf.hgot->root.u.def.value
7153 + htab->elf.hgot->root.u.def.section->output_section->vma
7154 + htab->elf.hgot->root.u.def.section->output_offset);
7155
7156 plt -= got;
7157
7158 if (plt + 0x8000 < 0x10000)
7159 {
7160 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7161 p += 4;
7162 bfd_put_32 (output_bfd, MTCTR_11, p);
7163 p += 4;
7164 bfd_put_32 (output_bfd, BCTR, p);
7165 p += 4;
7166 bfd_put_32 (output_bfd, NOP, p);
7167 p += 4;
7168 }
7169 else
7170 {
7171 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7172 p += 4;
7173 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7174 p += 4;
7175 bfd_put_32 (output_bfd, MTCTR_11, p);
7176 p += 4;
7177 bfd_put_32 (output_bfd, BCTR, p);
7178 p += 4;
7179 }
7180 }
7181 else
7182 {
7183 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7184 p += 4;
7185 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7186 p += 4;
7187 bfd_put_32 (output_bfd, MTCTR_11, p);
7188 p += 4;
7189 bfd_put_32 (output_bfd, BCTR, p);
7190 p += 4;
7191
7192 /* We only need one non-PIC glink stub. */
7193 break;
7194 }
7195 }
7196 else
7197 break;
7198 }
7199
7200 if (h->needs_copy)
7201 {
7202 asection *s;
7203 Elf_Internal_Rela rela;
7204 bfd_byte *loc;
7205
7206 /* This symbols needs a copy reloc. Set it up. */
7207
7208#ifdef DEBUG
7209 fprintf (stderr, ", copy");
7210#endif
7211
7212 BFD_ASSERT (h->dynindx != -1);
7213
7214 if (ppc_elf_hash_entry (h)->has_sda_refs)
7215 s = htab->relsbss;
7216 else
7217 s = htab->relbss;
7218 BFD_ASSERT (s != NULL);
7219
7220 rela.r_offset = (h->root.u.def.value
7221 + h->root.u.def.section->output_section->vma
7222 + h->root.u.def.section->output_offset);
7223 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7224 rela.r_addend = 0;
7225 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7226 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7227 }
7228
7229#ifdef DEBUG
7230 fprintf (stderr, "\n");
7231#endif
7232
7233 /* Mark some specially defined symbols as absolute. */
7234 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7235 || (!htab->is_vxworks
7236 && (h == htab->elf.hgot
7237 || strcmp (h->root.root.string,
7238 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7239 sym->st_shndx = SHN_ABS;
7240
7241 return TRUE;
7242}
7243\f
7244static enum elf_reloc_type_class
7245ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7246{
7247 switch (ELF32_R_TYPE (rela->r_info))
7248 {
7249 case R_PPC_RELATIVE:
7250 return reloc_class_relative;
7251 case R_PPC_REL24:
7252 case R_PPC_ADDR24:
7253 case R_PPC_JMP_SLOT:
7254 return reloc_class_plt;
7255 case R_PPC_COPY:
7256 return reloc_class_copy;
7257 default:
7258 return reloc_class_normal;
7259 }
7260}
7261\f
7262/* Finish up the dynamic sections. */
7263
7264static bfd_boolean
7265ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7266 struct bfd_link_info *info)
7267{
7268 asection *sdyn;
7269 asection *splt;
7270 struct ppc_elf_link_hash_table *htab;
7271 bfd_vma got;
7272 bfd * dynobj;
7273
7274#ifdef DEBUG
7275 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7276#endif
7277
7278 htab = ppc_elf_hash_table (info);
7279 dynobj = elf_hash_table (info)->dynobj;
7280 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7281 if (htab->is_vxworks)
7282 splt = bfd_get_section_by_name (dynobj, ".plt");
7283 else
7284 splt = NULL;
7285
7286 got = 0;
7287 if (htab->elf.hgot != NULL)
7288 got = (htab->elf.hgot->root.u.def.value
7289 + htab->elf.hgot->root.u.def.section->output_section->vma
7290 + htab->elf.hgot->root.u.def.section->output_offset);
7291
7292 if (htab->elf.dynamic_sections_created)
7293 {
7294 Elf32_External_Dyn *dyncon, *dynconend;
7295
7296 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7297
7298 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7299 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7300 for (; dyncon < dynconend; dyncon++)
7301 {
7302 Elf_Internal_Dyn dyn;
7303 asection *s;
7304
7305 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7306
7307 switch (dyn.d_tag)
7308 {
7309 case DT_PLTGOT:
7310 if (htab->is_vxworks)
7311 s = htab->sgotplt;
7312 else
7313 s = htab->plt;
7314 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7315 break;
7316
7317 case DT_PLTRELSZ:
7318 dyn.d_un.d_val = htab->relplt->size;
7319 break;
7320
7321 case DT_JMPREL:
7322 s = htab->relplt;
7323 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7324 break;
7325
7326 case DT_PPC_GOT:
7327 dyn.d_un.d_ptr = got;
7328 break;
7329
7330 case DT_RELASZ:
7331 if (htab->is_vxworks)
7332 {
7333 if (htab->relplt)
7334 dyn.d_un.d_ptr -= htab->relplt->size;
7335 break;
7336 }
7337 continue;
7338
7339 default:
7340 continue;
7341 }
7342
7343 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7344 }
7345 }
7346
7347 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7348 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7349 if (htab->got != NULL)
7350 {
7351 unsigned char *p = htab->got->contents;
7352 bfd_vma val;
7353
7354 p += htab->elf.hgot->root.u.def.value;
7355 if (htab->plt_type == PLT_OLD)
7356 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7357
7358 val = 0;
7359 if (sdyn != NULL)
7360 val = sdyn->output_section->vma + sdyn->output_offset;
7361 bfd_put_32 (output_bfd, val, p);
7362
7363 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7364 }
7365
7366 /* Fill in the first entry in the VxWorks procedure linkage table. */
7367 if (splt && splt->size > 0)
7368 {
7369 /* Use the right PLT. */
7370 static const bfd_vma *plt_entry = NULL;
7371 plt_entry = info->shared ?
7372 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7373
7374 if (!info->shared)
7375 {
7376 bfd_vma got_value =
7377 (htab->elf.hgot->root.u.def.section->output_section->vma
7378 + htab->elf.hgot->root.u.def.section->output_offset
7379 + htab->elf.hgot->root.u.def.value);
7380 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7381
7382 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7383 splt->contents + 0);
7384 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7385 splt->contents + 4);
7386 }
7387 else
7388 {
7389 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7390 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7391 }
7392 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7393 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7394 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7395 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7396 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7397 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7398
7399 if (! info->shared)
7400 {
7401 Elf_Internal_Rela rela;
7402 bfd_byte *loc;
7403
7404 loc = htab->srelplt2->contents;
7405
7406 /* Output the @ha relocation for the first instruction. */
7407 rela.r_offset = (htab->plt->output_section->vma
7408 + htab->plt->output_offset
7409 + 2);
7410 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7411 rela.r_addend = 0;
7412 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7413 loc += sizeof (Elf32_External_Rela);
7414
7415 /* Output the @l relocation for the second instruction. */
7416 rela.r_offset = (htab->plt->output_section->vma
7417 + htab->plt->output_offset
7418 + 6);
7419 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7420 rela.r_addend = 0;
7421 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7422 loc += sizeof (Elf32_External_Rela);
7423
7424 /* Fix up the remaining relocations. They may have the wrong
7425 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7426 in which symbols were output. */
7427 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7428 {
7429 Elf_Internal_Rela rel;
7430
7431 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7432 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7433 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7434 loc += sizeof (Elf32_External_Rela);
7435
7436 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7437 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7438 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7439 loc += sizeof (Elf32_External_Rela);
7440
7441 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7442 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7443 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7444 loc += sizeof (Elf32_External_Rela);
7445 }
7446 }
7447 }
7448
7449 if (htab->glink != NULL && htab->glink->contents != NULL)
7450 {
7451 unsigned char *p;
7452 unsigned char *endp;
7453 bfd_vma res0;
7454 unsigned int i;
7455
7456 /*
7457 * PIC glink code is the following:
7458 *
7459 * # ith PLT code stub.
7460 * addis 11,30,(plt+(i-1)*4-got)@ha
7461 * lwz 11,(plt+(i-1)*4-got)@l(11)
7462 * mtctr 11
7463 * bctr
7464 *
7465 * # A table of branches, one for each plt entry.
7466 * # The idea is that the plt call stub loads ctr (and r11) with these
7467 * # addresses, so (r11 - res_0) gives the plt index * 4.
7468 * res_0: b PLTresolve
7469 * res_1: b PLTresolve
7470 * .
7471 * # Some number of entries towards the end can be nops
7472 * res_n_m3: nop
7473 * res_n_m2: nop
7474 * res_n_m1:
7475 *
7476 * PLTresolve:
7477 * addis 11,11,(1f-res_0)@ha
7478 * mflr 0
7479 * bcl 20,31,1f
7480 * 1: addi 11,11,(1b-res_0)@l
7481 * mflr 12
7482 * mtlr 0
7483 * sub 11,11,12 # r11 = index * 4
7484 * addis 12,12,(got+4-1b)@ha
7485 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7486 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7487 * mtctr 0
7488 * add 0,11,11
7489 * add 11,0,11 # r11 = index * 12 = reloc offset.
7490 * bctr
7491 */
7492 static const unsigned int pic_plt_resolve[] =
7493 {
7494 ADDIS_11_11,
7495 MFLR_0,
7496 BCL_20_31,
7497 ADDI_11_11,
7498 MFLR_12,
7499 MTLR_0,
7500 SUB_11_11_12,
7501 ADDIS_12_12,
7502 LWZ_0_12,
7503 LWZ_12_12,
7504 MTCTR_0,
7505 ADD_0_11_11,
7506 ADD_11_0_11,
7507 BCTR,
7508 NOP,
7509 NOP
7510 };
7511
7512 static const unsigned int plt_resolve[] =
7513 {
7514 LIS_12,
7515 ADDIS_11_11,
7516 LWZ_0_12,
7517 ADDI_11_11,
7518 MTCTR_0,
7519 ADD_0_11_11,
7520 LWZ_12_12,
7521 ADD_11_0_11,
7522 BCTR,
7523 NOP,
7524 NOP,
7525 NOP,
7526 NOP,
7527 NOP,
7528 NOP,
7529 NOP
7530 };
7531
7532 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7533 abort ();
7534 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7535 abort ();
7536
7537 /* Build the branch table, one for each plt entry (less one),
7538 and perhaps some padding. */
7539 p = htab->glink->contents;
7540 p += htab->glink_pltresolve;
7541 endp = htab->glink->contents;
7542 endp += htab->glink->size - GLINK_PLTRESOLVE;
7543 while (p < endp - 8 * 4)
7544 {
7545 bfd_put_32 (output_bfd, B + endp - p, p);
7546 p += 4;
7547 }
7548 while (p < endp)
7549 {
7550 bfd_put_32 (output_bfd, NOP, p);
7551 p += 4;
7552 }
7553
7554 res0 = (htab->glink_pltresolve
7555 + htab->glink->output_section->vma
7556 + htab->glink->output_offset);
7557
7558 /* Last comes the PLTresolve stub. */
7559 if (info->shared || info->pie)
7560 {
7561 bfd_vma bcl;
7562
7563 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7564 {
7565 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7566 p += 4;
7567 }
7568 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7569
7570 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7571 + htab->glink->output_section->vma
7572 + htab->glink->output_offset);
7573
7574 bfd_put_32 (output_bfd,
7575 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7576 bfd_put_32 (output_bfd,
7577 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7578 bfd_put_32 (output_bfd,
7579 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7580 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7581 {
7582 bfd_put_32 (output_bfd,
7583 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7584 bfd_put_32 (output_bfd,
7585 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7586 }
7587 else
7588 {
7589 bfd_put_32 (output_bfd,
7590 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7591 bfd_put_32 (output_bfd,
7592 LWZ_12_12 + 4, p + 9*4);
7593 }
7594 }
7595 else
7596 {
7597 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7598 {
7599 bfd_put_32 (output_bfd, plt_resolve[i], p);
7600 p += 4;
7601 }
7602 p -= 4 * ARRAY_SIZE (plt_resolve);
7603
7604 bfd_put_32 (output_bfd,
7605 LIS_12 + PPC_HA (got + 4), p + 0*4);
7606 bfd_put_32 (output_bfd,
7607 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7608 bfd_put_32 (output_bfd,
7609 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7610 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7611 {
7612 bfd_put_32 (output_bfd,
7613 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7614 bfd_put_32 (output_bfd,
7615 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7616 }
7617 else
7618 {
7619 bfd_put_32 (output_bfd,
7620 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7621 bfd_put_32 (output_bfd,
7622 LWZ_12_12 + 4, p + 6*4);
7623 }
7624 }
7625 }
7626
7627 return TRUE;
7628}
7629\f
7630#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7631#define TARGET_LITTLE_NAME "elf32-powerpcle"
7632#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7633#define TARGET_BIG_NAME "elf32-powerpc"
7634#define ELF_ARCH bfd_arch_powerpc
7635#define ELF_MACHINE_CODE EM_PPC
7636#ifdef __QNXTARGET__
7637#define ELF_MAXPAGESIZE 0x1000
7638#else
7639#define ELF_MAXPAGESIZE 0x10000
7640#endif
7641#define ELF_MINPAGESIZE 0x1000
7642#define ELF_COMMONPAGESIZE 0x1000
7643#define elf_info_to_howto ppc_elf_info_to_howto
7644
7645#ifdef EM_CYGNUS_POWERPC
7646#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7647#endif
7648
7649#ifdef EM_PPC_OLD
7650#define ELF_MACHINE_ALT2 EM_PPC_OLD
7651#endif
7652
7653#define elf_backend_plt_not_loaded 1
7654#define elf_backend_can_gc_sections 1
7655#define elf_backend_can_refcount 1
7656#define elf_backend_rela_normal 1
7657
7658#define bfd_elf32_mkobject ppc_elf_mkobject
7659#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7660#define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7661#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7662#define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7663#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7664#define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7665
7666#define elf_backend_object_p ppc_elf_object_p
7667#define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7668#define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7669#define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7670#define elf_backend_relocate_section ppc_elf_relocate_section
7671#define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7672#define elf_backend_check_relocs ppc_elf_check_relocs
7673#define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7674#define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7675#define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7676#define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7677#define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7678#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7679#define elf_backend_fake_sections ppc_elf_fake_sections
7680#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7681#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7682#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7683#define elf_backend_write_core_note ppc_elf_write_core_note
7684#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7685#define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7686#define elf_backend_final_write_processing ppc_elf_final_write_processing
7687#define elf_backend_write_section ppc_elf_write_section
7688#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7689#define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7690#define elf_backend_action_discarded ppc_elf_action_discarded
7691#define elf_backend_init_index_section _bfd_elf_init_1_index_section
7692
7693#include "elf32-target.h"
7694
7695/* VxWorks Target */
7696
7697#undef TARGET_LITTLE_SYM
7698#undef TARGET_LITTLE_NAME
7699
7700#undef TARGET_BIG_SYM
7701#define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7702#undef TARGET_BIG_NAME
7703#define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7704
7705/* VxWorks uses the elf default section flags for .plt. */
7706static const struct bfd_elf_special_section *
7707ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7708{
7709 if (sec->name == NULL)
7710 return NULL;
7711
7712 if (strcmp (sec->name, ".plt") == 0)
7713 return _bfd_elf_get_sec_type_attr (abfd, sec);
7714
7715 return ppc_elf_get_sec_type_attr (abfd, sec);
7716}
7717
7718/* Like ppc_elf_link_hash_table_create, but overrides
7719 appropriately for VxWorks. */
7720static struct bfd_link_hash_table *
7721ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7722{
7723 struct bfd_link_hash_table *ret;
7724
7725 ret = ppc_elf_link_hash_table_create (abfd);
7726 if (ret)
7727 {
7728 struct ppc_elf_link_hash_table *htab
7729 = (struct ppc_elf_link_hash_table *)ret;
7730 htab->is_vxworks = 1;
7731 htab->plt_type = PLT_VXWORKS;
7732 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7733 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7734 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7735 }
7736 return ret;
7737}
7738
7739/* Tweak magic VxWorks symbols as they are loaded. */
7740static bfd_boolean
7741ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7742 struct bfd_link_info *info,
7743 Elf_Internal_Sym *sym,
7744 const char **namep ATTRIBUTE_UNUSED,
7745 flagword *flagsp ATTRIBUTE_UNUSED,
7746 asection **secp,
7747 bfd_vma *valp)
7748{
7749 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7750 valp))
7751 return FALSE;
7752
7753 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7754}
7755
7756static void
7757ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7758{
7759 ppc_elf_final_write_processing(abfd, linker);
7760 elf_vxworks_final_write_processing(abfd, linker);
7761}
7762
7763/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7764 define it. */
7765#undef elf_backend_want_plt_sym
7766#define elf_backend_want_plt_sym 1
7767#undef elf_backend_want_got_plt
7768#define elf_backend_want_got_plt 1
7769#undef elf_backend_got_symbol_offset
7770#define elf_backend_got_symbol_offset 0
7771#undef elf_backend_plt_not_loaded
7772#define elf_backend_plt_not_loaded 0
7773#undef elf_backend_plt_readonly
7774#define elf_backend_plt_readonly 1
7775#undef elf_backend_got_header_size
7776#define elf_backend_got_header_size 12
7777
7778#undef bfd_elf32_bfd_link_hash_table_create
7779#define bfd_elf32_bfd_link_hash_table_create \
7780 ppc_elf_vxworks_link_hash_table_create
7781#undef elf_backend_add_symbol_hook
7782#define elf_backend_add_symbol_hook \
7783 ppc_elf_vxworks_add_symbol_hook
7784#undef elf_backend_link_output_symbol_hook
7785#define elf_backend_link_output_symbol_hook \
7786 elf_vxworks_link_output_symbol_hook
7787#undef elf_backend_final_write_processing
7788#define elf_backend_final_write_processing \
7789 ppc_elf_vxworks_final_write_processing
7790#undef elf_backend_get_sec_type_attr
7791#define elf_backend_get_sec_type_attr \
7792 ppc_elf_vxworks_get_sec_type_attr
7793#undef elf_backend_emit_relocs
7794#define elf_backend_emit_relocs \
7795 elf_vxworks_emit_relocs
7796
7797#undef elf32_bed
7798#define elf32_bed ppc_elf_vxworks_bed
7799
7800#include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.056813 seconds and 4 git commands to generate.