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2008-03-07 Paul Brook <paul@codesourcery.com>
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008 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
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static 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
69 static 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 };
81 static 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
96 static 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 };
108 static 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
161 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
163 static 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
1460 static void
1461 ppc_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
1477 static reloc_howto_type *
1478 ppc_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
1582 static reloc_howto_type *
1583 ppc_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
1600 static void
1601 ppc_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
1626 static bfd_reloc_status_type
1627 ppc_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
1662 static bfd_reloc_status_type
1663 ppc_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
1690 typedef 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
1708 typedef 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
1720 struct 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 #define is_ppc_elf(bfd) \
1740 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1741 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1742
1743 /* Override the generic function because we store some extras. */
1744
1745 static bfd_boolean
1746 ppc_elf_mkobject (bfd *abfd)
1747 {
1748 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1749 PPC32_ELF_TDATA);
1750 }
1751
1752 /* Fix bad default arch selected for a 32 bit input bfd when the
1753 default is 64 bit. */
1754
1755 static bfd_boolean
1756 ppc_elf_object_p (bfd *abfd)
1757 {
1758 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1759 {
1760 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1761
1762 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1763 {
1764 /* Relies on arch after 64 bit default being 32 bit default. */
1765 abfd->arch_info = abfd->arch_info->next;
1766 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1767 }
1768 }
1769 return TRUE;
1770 }
1771
1772 /* Function to set whether a module needs the -mrelocatable bit set. */
1773
1774 static bfd_boolean
1775 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1776 {
1777 BFD_ASSERT (!elf_flags_init (abfd)
1778 || elf_elfheader (abfd)->e_flags == flags);
1779
1780 elf_elfheader (abfd)->e_flags = flags;
1781 elf_flags_init (abfd) = TRUE;
1782 return TRUE;
1783 }
1784
1785 /* Support for core dump NOTE sections. */
1786
1787 static bfd_boolean
1788 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1789 {
1790 int offset;
1791 unsigned int size;
1792
1793 switch (note->descsz)
1794 {
1795 default:
1796 return FALSE;
1797
1798 case 268: /* Linux/PPC. */
1799 /* pr_cursig */
1800 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1801
1802 /* pr_pid */
1803 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1804
1805 /* pr_reg */
1806 offset = 72;
1807 size = 192;
1808
1809 break;
1810 }
1811
1812 /* Make a ".reg/999" section. */
1813 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1814 size, note->descpos + offset);
1815 }
1816
1817 static bfd_boolean
1818 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 switch (note->descsz)
1821 {
1822 default:
1823 return FALSE;
1824
1825 case 128: /* Linux/PPC elf_prpsinfo. */
1826 elf_tdata (abfd)->core_program
1827 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1828 elf_tdata (abfd)->core_command
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1830 }
1831
1832 /* Note that for some reason, a spurious space is tacked
1833 onto the end of the args in some (at least one anyway)
1834 implementations, so strip it off if it exists. */
1835
1836 {
1837 char *command = elf_tdata (abfd)->core_command;
1838 int n = strlen (command);
1839
1840 if (0 < n && command[n - 1] == ' ')
1841 command[n - 1] = '\0';
1842 }
1843
1844 return TRUE;
1845 }
1846
1847 static char *
1848 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1849 {
1850 switch (note_type)
1851 {
1852 default:
1853 return NULL;
1854
1855 case NT_PRPSINFO:
1856 {
1857 char data[128];
1858 va_list ap;
1859
1860 va_start (ap, note_type);
1861 memset (data, 0, 32);
1862 strncpy (data + 32, va_arg (ap, const char *), 16);
1863 strncpy (data + 48, va_arg (ap, const char *), 80);
1864 va_end (ap);
1865 return elfcore_write_note (abfd, buf, bufsiz,
1866 "CORE", note_type, data, sizeof (data));
1867 }
1868
1869 case NT_PRSTATUS:
1870 {
1871 char data[268];
1872 va_list ap;
1873 long pid;
1874 int cursig;
1875 const void *greg;
1876
1877 va_start (ap, note_type);
1878 memset (data, 0, 72);
1879 pid = va_arg (ap, long);
1880 bfd_put_32 (abfd, pid, data + 24);
1881 cursig = va_arg (ap, int);
1882 bfd_put_16 (abfd, cursig, data + 12);
1883 greg = va_arg (ap, const void *);
1884 memcpy (data + 72, greg, 192);
1885 memset (data + 264, 0, 4);
1886 va_end (ap);
1887 return elfcore_write_note (abfd, buf, bufsiz,
1888 "CORE", note_type, data, sizeof (data));
1889 }
1890 }
1891 }
1892
1893 /* Return address for Ith PLT stub in section PLT, for relocation REL
1894 or (bfd_vma) -1 if it should not be included. */
1895
1896 static bfd_vma
1897 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1898 const asection *plt ATTRIBUTE_UNUSED,
1899 const arelent *rel)
1900 {
1901 return rel->address;
1902 }
1903
1904 /* Handle a PowerPC specific section when reading an object file. This
1905 is called when bfd_section_from_shdr finds a section with an unknown
1906 type. */
1907
1908 static bfd_boolean
1909 ppc_elf_section_from_shdr (bfd *abfd,
1910 Elf_Internal_Shdr *hdr,
1911 const char *name,
1912 int shindex)
1913 {
1914 asection *newsect;
1915 flagword flags;
1916
1917 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918 return FALSE;
1919
1920 newsect = hdr->bfd_section;
1921 flags = bfd_get_section_flags (abfd, newsect);
1922 if (hdr->sh_flags & SHF_EXCLUDE)
1923 flags |= SEC_EXCLUDE;
1924
1925 if (hdr->sh_type == SHT_ORDERED)
1926 flags |= SEC_SORT_ENTRIES;
1927
1928 bfd_set_section_flags (abfd, newsect, flags);
1929 return TRUE;
1930 }
1931
1932 /* Set up any other section flags and such that may be necessary. */
1933
1934 static bfd_boolean
1935 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1936 Elf_Internal_Shdr *shdr,
1937 asection *asect)
1938 {
1939 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1940 shdr->sh_flags |= SHF_EXCLUDE;
1941
1942 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1943 shdr->sh_type = SHT_ORDERED;
1944
1945 return TRUE;
1946 }
1947
1948 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1949 need to bump up the number of section headers. */
1950
1951 static int
1952 ppc_elf_additional_program_headers (bfd *abfd,
1953 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1954 {
1955 asection *s;
1956 int ret = 0;
1957
1958 s = bfd_get_section_by_name (abfd, ".sbss2");
1959 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960 ++ret;
1961
1962 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1963 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1964 ++ret;
1965
1966 return ret;
1967 }
1968
1969 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1970 .PPC.EMB.sbss0 a normal section, and not a bss section so
1971 that the linker doesn't crater when trying to make more than
1972 2 sections. */
1973
1974 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1975 {
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1977 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1979 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1982 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1983 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1985 { NULL, 0, 0, 0, 0 }
1986 };
1987
1988 /* This is what we want for new plt/got. */
1989 static struct bfd_elf_special_section ppc_alt_plt =
1990 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1991
1992 static const struct bfd_elf_special_section *
1993 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1994 {
1995 const struct bfd_elf_special_section *ssect;
1996
1997 /* See if this is one of the special sections. */
1998 if (sec->name == NULL)
1999 return NULL;
2000
2001 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2002 sec->use_rela_p);
2003 if (ssect != NULL)
2004 {
2005 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2006 ssect = &ppc_alt_plt;
2007 return ssect;
2008 }
2009
2010 return _bfd_elf_get_sec_type_attr (abfd, sec);
2011 }
2012 \f
2013 /* Very simple linked list structure for recording apuinfo values. */
2014 typedef struct apuinfo_list
2015 {
2016 struct apuinfo_list *next;
2017 unsigned long value;
2018 }
2019 apuinfo_list;
2020
2021 static apuinfo_list *head;
2022
2023
2024 static void
2025 apuinfo_list_init (void)
2026 {
2027 head = NULL;
2028 }
2029
2030 static void
2031 apuinfo_list_add (unsigned long value)
2032 {
2033 apuinfo_list *entry = head;
2034
2035 while (entry != NULL)
2036 {
2037 if (entry->value == value)
2038 return;
2039 entry = entry->next;
2040 }
2041
2042 entry = bfd_malloc (sizeof (* entry));
2043 if (entry == NULL)
2044 return;
2045
2046 entry->value = value;
2047 entry->next = head;
2048 head = entry;
2049 }
2050
2051 static unsigned
2052 apuinfo_list_length (void)
2053 {
2054 apuinfo_list *entry;
2055 unsigned long count;
2056
2057 for (entry = head, count = 0;
2058 entry;
2059 entry = entry->next)
2060 ++ count;
2061
2062 return count;
2063 }
2064
2065 static inline unsigned long
2066 apuinfo_list_element (unsigned long number)
2067 {
2068 apuinfo_list * entry;
2069
2070 for (entry = head;
2071 entry && number --;
2072 entry = entry->next)
2073 ;
2074
2075 return entry ? entry->value : 0;
2076 }
2077
2078 static void
2079 apuinfo_list_finish (void)
2080 {
2081 apuinfo_list *entry;
2082
2083 for (entry = head; entry;)
2084 {
2085 apuinfo_list *next = entry->next;
2086 free (entry);
2087 entry = next;
2088 }
2089
2090 head = NULL;
2091 }
2092
2093 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2094 #define APUINFO_LABEL "APUinfo"
2095
2096 /* Scan the input BFDs and create a linked list of
2097 the APUinfo values that will need to be emitted. */
2098
2099 static void
2100 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2101 {
2102 bfd *ibfd;
2103 asection *asec;
2104 char *buffer;
2105 unsigned num_input_sections;
2106 bfd_size_type output_section_size;
2107 unsigned i;
2108 unsigned num_entries;
2109 unsigned long offset;
2110 unsigned long length;
2111 const char *error_message = NULL;
2112
2113 if (link_info == NULL)
2114 return;
2115
2116 /* Scan the input bfds, looking for apuinfo sections. */
2117 num_input_sections = 0;
2118 output_section_size = 0;
2119
2120 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2121 {
2122 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2123 if (asec)
2124 {
2125 ++ num_input_sections;
2126 output_section_size += asec->size;
2127 }
2128 }
2129
2130 /* We need at least one input sections
2131 in order to make merging worthwhile. */
2132 if (num_input_sections < 1)
2133 return;
2134
2135 /* Just make sure that the output section exists as well. */
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137 if (asec == NULL)
2138 return;
2139
2140 /* Allocate a buffer for the contents of the input sections. */
2141 buffer = bfd_malloc (output_section_size);
2142 if (buffer == NULL)
2143 return;
2144
2145 offset = 0;
2146 apuinfo_list_init ();
2147
2148 /* Read in the input sections contents. */
2149 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2150 {
2151 unsigned long datum;
2152 char *ptr;
2153
2154 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2155 if (asec == NULL)
2156 continue;
2157
2158 length = asec->size;
2159 if (length < 24)
2160 {
2161 error_message = _("corrupt or empty %s section in %B");
2162 goto fail;
2163 }
2164
2165 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2166 || (bfd_bread (buffer + offset, length, ibfd) != length))
2167 {
2168 error_message = _("unable to read in %s section from %B");
2169 goto fail;
2170 }
2171
2172 /* Process the contents of the section. */
2173 ptr = buffer + offset;
2174 error_message = _("corrupt %s section in %B");
2175
2176 /* Verify the contents of the header. Note - we have to
2177 extract the values this way in order to allow for a
2178 host whose endian-ness is different from the target. */
2179 datum = bfd_get_32 (ibfd, ptr);
2180 if (datum != sizeof APUINFO_LABEL)
2181 goto fail;
2182
2183 datum = bfd_get_32 (ibfd, ptr + 8);
2184 if (datum != 0x2)
2185 goto fail;
2186
2187 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2188 goto fail;
2189
2190 /* Get the number of bytes used for apuinfo entries. */
2191 datum = bfd_get_32 (ibfd, ptr + 4);
2192 if (datum + 20 != length)
2193 goto fail;
2194
2195 /* Make sure that we do not run off the end of the section. */
2196 if (offset + length > output_section_size)
2197 goto fail;
2198
2199 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2200 for (i = 0; i < datum; i += 4)
2201 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2202
2203 /* Update the offset. */
2204 offset += length;
2205 }
2206
2207 error_message = NULL;
2208
2209 /* Compute the size of the output section. */
2210 num_entries = apuinfo_list_length ();
2211 output_section_size = 20 + num_entries * 4;
2212
2213 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214
2215 if (! bfd_set_section_size (abfd, asec, output_section_size))
2216 ibfd = abfd,
2217 error_message = _("warning: unable to set size of %s section in %B");
2218
2219 fail:
2220 free (buffer);
2221
2222 if (error_message)
2223 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2224 }
2225
2226 /* Prevent the output section from accumulating the input sections'
2227 contents. We have already stored this in our linked list structure. */
2228
2229 static bfd_boolean
2230 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2231 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2232 asection *asec,
2233 bfd_byte *contents ATTRIBUTE_UNUSED)
2234 {
2235 return (apuinfo_list_length ()
2236 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2237 }
2238
2239 /* Finally we can generate the output section. */
2240
2241 static void
2242 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2243 {
2244 bfd_byte *buffer;
2245 asection *asec;
2246 unsigned i;
2247 unsigned num_entries;
2248 bfd_size_type length;
2249
2250 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2251 if (asec == NULL)
2252 return;
2253
2254 if (apuinfo_list_length () == 0)
2255 return;
2256
2257 length = asec->size;
2258 if (length < 20)
2259 return;
2260
2261 buffer = bfd_malloc (length);
2262 if (buffer == NULL)
2263 {
2264 (*_bfd_error_handler)
2265 (_("failed to allocate space for new APUinfo section."));
2266 return;
2267 }
2268
2269 /* Create the apuinfo header. */
2270 num_entries = apuinfo_list_length ();
2271 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2272 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2273 bfd_put_32 (abfd, 0x2, buffer + 8);
2274 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2275
2276 length = 20;
2277 for (i = 0; i < num_entries; i++)
2278 {
2279 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2280 length += 4;
2281 }
2282
2283 if (length != asec->size)
2284 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2285
2286 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2287 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2288
2289 free (buffer);
2290
2291 apuinfo_list_finish ();
2292 }
2293 \f
2294 /* The following functions are specific to the ELF linker, while
2295 functions above are used generally. They appear in this file more
2296 or less in the order in which they are called. eg.
2297 ppc_elf_check_relocs is called early in the link process,
2298 ppc_elf_finish_dynamic_sections is one of the last functions
2299 called. */
2300
2301 /* The PPC linker needs to keep track of the number of relocs that it
2302 decides to copy as dynamic relocs in check_relocs for each symbol.
2303 This is so that it can later discard them if they are found to be
2304 unnecessary. We store the information in a field extending the
2305 regular ELF linker hash table. */
2306
2307 struct ppc_elf_dyn_relocs
2308 {
2309 struct ppc_elf_dyn_relocs *next;
2310
2311 /* The input section of the reloc. */
2312 asection *sec;
2313
2314 /* Total number of relocs copied for the input section. */
2315 bfd_size_type count;
2316
2317 /* Number of pc-relative relocs copied for the input section. */
2318 bfd_size_type pc_count;
2319 };
2320
2321 /* Track PLT entries needed for a given symbol. We might need more
2322 than one glink entry per symbol. */
2323 struct plt_entry
2324 {
2325 struct plt_entry *next;
2326
2327 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2328 This field stores the offset into .got2 used to initialise the
2329 GOT pointer reg. It will always be at least 32768 (and for
2330 current gcc this is the only offset used). */
2331 bfd_vma addend;
2332
2333 /* The .got2 section. */
2334 asection *sec;
2335
2336 /* PLT refcount or offset. */
2337 union
2338 {
2339 bfd_signed_vma refcount;
2340 bfd_vma offset;
2341 } plt;
2342
2343 /* .glink stub offset. */
2344 bfd_vma glink_offset;
2345 };
2346
2347 /* Of those relocs that might be copied as dynamic relocs, this macro
2348 selects those that must be copied when linking a shared library,
2349 even when the symbol is local. */
2350
2351 #define MUST_BE_DYN_RELOC(RTYPE) \
2352 ((RTYPE) != R_PPC_REL24 \
2353 && (RTYPE) != R_PPC_REL14 \
2354 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2355 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2356 && (RTYPE) != R_PPC_REL32)
2357
2358 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2359 copying dynamic variables from a shared lib into an app's dynbss
2360 section, and instead use a dynamic relocation to point into the
2361 shared lib. */
2362 #define ELIMINATE_COPY_RELOCS 1
2363
2364 /* PPC ELF linker hash entry. */
2365
2366 struct ppc_elf_link_hash_entry
2367 {
2368 struct elf_link_hash_entry elf;
2369
2370 /* If this symbol is used in the linker created sections, the processor
2371 specific backend uses this field to map the field into the offset
2372 from the beginning of the section. */
2373 elf_linker_section_pointers_t *linker_section_pointer;
2374
2375 /* Track dynamic relocs copied for this symbol. */
2376 struct ppc_elf_dyn_relocs *dyn_relocs;
2377
2378 /* Contexts in which symbol is used in the GOT (or TOC).
2379 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2380 corresponding relocs are encountered during check_relocs.
2381 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2382 indicate the corresponding GOT entry type is not needed. */
2383 #define TLS_GD 1 /* GD reloc. */
2384 #define TLS_LD 2 /* LD reloc. */
2385 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2386 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2387 #define TLS_TLS 16 /* Any TLS reloc. */
2388 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2389 char tls_mask;
2390
2391 /* Nonzero if we have seen a small data relocation referring to this
2392 symbol. */
2393 unsigned char has_sda_refs;
2394 };
2395
2396 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2397
2398 /* PPC ELF linker hash table. */
2399
2400 struct ppc_elf_link_hash_table
2401 {
2402 struct elf_link_hash_table elf;
2403
2404 /* Short-cuts to get to dynamic linker sections. */
2405 asection *got;
2406 asection *relgot;
2407 asection *glink;
2408 asection *plt;
2409 asection *relplt;
2410 asection *dynbss;
2411 asection *relbss;
2412 asection *dynsbss;
2413 asection *relsbss;
2414 elf_linker_section_t sdata[2];
2415 asection *sbss;
2416
2417 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2418 asection *srelplt2;
2419
2420 /* The .got.plt section (VxWorks only)*/
2421 asection *sgotplt;
2422
2423 /* Shortcut to .__tls_get_addr. */
2424 struct elf_link_hash_entry *tls_get_addr;
2425
2426 /* The bfd that forced an old-style PLT. */
2427 bfd *old_bfd;
2428
2429 /* TLS local dynamic got entry handling. */
2430 union {
2431 bfd_signed_vma refcount;
2432 bfd_vma offset;
2433 } tlsld_got;
2434
2435 /* Offset of PltResolve function in glink. */
2436 bfd_vma glink_pltresolve;
2437
2438 /* Size of reserved GOT entries. */
2439 unsigned int got_header_size;
2440 /* Non-zero if allocating the header left a gap. */
2441 unsigned int got_gap;
2442
2443 /* The type of PLT we have chosen to use. */
2444 enum ppc_elf_plt_type plt_type;
2445
2446 /* Set if we should emit symbols for stubs. */
2447 unsigned int emit_stub_syms:1;
2448
2449 /* True if the target system is VxWorks. */
2450 unsigned int is_vxworks:1;
2451
2452 /* The size of PLT entries. */
2453 int plt_entry_size;
2454 /* The distance between adjacent PLT slots. */
2455 int plt_slot_size;
2456 /* The size of the first PLT entry. */
2457 int plt_initial_entry_size;
2458
2459 /* Small local sym to section mapping cache. */
2460 struct sym_sec_cache sym_sec;
2461 };
2462
2463 /* Get the PPC ELF linker hash table from a link_info structure. */
2464
2465 #define ppc_elf_hash_table(p) \
2466 ((struct ppc_elf_link_hash_table *) (p)->hash)
2467
2468 /* Create an entry in a PPC ELF linker hash table. */
2469
2470 static struct bfd_hash_entry *
2471 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2472 struct bfd_hash_table *table,
2473 const char *string)
2474 {
2475 /* Allocate the structure if it has not already been allocated by a
2476 subclass. */
2477 if (entry == NULL)
2478 {
2479 entry = bfd_hash_allocate (table,
2480 sizeof (struct ppc_elf_link_hash_entry));
2481 if (entry == NULL)
2482 return entry;
2483 }
2484
2485 /* Call the allocation method of the superclass. */
2486 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2487 if (entry != NULL)
2488 {
2489 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2490 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2491 ppc_elf_hash_entry (entry)->tls_mask = 0;
2492 }
2493
2494 return entry;
2495 }
2496
2497 /* Create a PPC ELF linker hash table. */
2498
2499 static struct bfd_link_hash_table *
2500 ppc_elf_link_hash_table_create (bfd *abfd)
2501 {
2502 struct ppc_elf_link_hash_table *ret;
2503
2504 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2505 if (ret == NULL)
2506 return NULL;
2507
2508 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2509 ppc_elf_link_hash_newfunc,
2510 sizeof (struct ppc_elf_link_hash_entry)))
2511 {
2512 free (ret);
2513 return NULL;
2514 }
2515
2516 ret->elf.init_plt_refcount.refcount = 0;
2517 ret->elf.init_plt_refcount.glist = NULL;
2518 ret->elf.init_plt_offset.offset = 0;
2519 ret->elf.init_plt_offset.glist = NULL;
2520
2521 ret->sdata[0].name = ".sdata";
2522 ret->sdata[0].sym_name = "_SDA_BASE_";
2523 ret->sdata[0].bss_name = ".sbss";
2524
2525 ret->sdata[1].name = ".sdata2";
2526 ret->sdata[1].sym_name = "_SDA2_BASE_";
2527 ret->sdata[1].bss_name = ".sbss2";
2528
2529 ret->plt_entry_size = 12;
2530 ret->plt_slot_size = 8;
2531 ret->plt_initial_entry_size = 72;
2532
2533 return &ret->elf.root;
2534 }
2535
2536 /* Create .got and the related sections. */
2537
2538 static bfd_boolean
2539 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2540 {
2541 struct ppc_elf_link_hash_table *htab;
2542 asection *s;
2543 flagword flags;
2544
2545 if (!_bfd_elf_create_got_section (abfd, info))
2546 return FALSE;
2547
2548 htab = ppc_elf_hash_table (info);
2549 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2550 if (s == NULL)
2551 abort ();
2552
2553 if (htab->is_vxworks)
2554 {
2555 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2556 if (!htab->sgotplt)
2557 abort ();
2558 }
2559 else
2560 {
2561 /* The powerpc .got has a blrl instruction in it. Mark it
2562 executable. */
2563 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2564 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2565 if (!bfd_set_section_flags (abfd, s, flags))
2566 return FALSE;
2567 }
2568
2569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2570 | SEC_LINKER_CREATED | SEC_READONLY);
2571 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2572 if (!htab->relgot
2573 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2574 return FALSE;
2575
2576 return TRUE;
2577 }
2578
2579 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2580 to output sections (just like _bfd_elf_create_dynamic_sections has
2581 to create .dynbss and .rela.bss). */
2582
2583 static bfd_boolean
2584 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2585 {
2586 struct ppc_elf_link_hash_table *htab;
2587 asection *s;
2588 flagword flags;
2589
2590 htab = ppc_elf_hash_table (info);
2591
2592 if (htab->got == NULL
2593 && !ppc_elf_create_got (abfd, info))
2594 return FALSE;
2595
2596 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2597 return FALSE;
2598
2599 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2600 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2601
2602 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2603 htab->glink = s;
2604 if (s == NULL
2605 || !bfd_set_section_alignment (abfd, s, 4))
2606 return FALSE;
2607
2608 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2609 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2610 SEC_ALLOC | SEC_LINKER_CREATED);
2611 htab->dynsbss = s;
2612 if (s == NULL)
2613 return FALSE;
2614
2615 if (! info->shared)
2616 {
2617 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2618 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2619 htab->relsbss = s;
2620 if (s == NULL
2621 || ! bfd_set_section_alignment (abfd, s, 2))
2622 return FALSE;
2623 }
2624
2625 if (htab->is_vxworks
2626 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2627 return FALSE;
2628
2629 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2630 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2631 if (s == NULL)
2632 abort ();
2633
2634 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2635 if (htab->plt_type == PLT_VXWORKS)
2636 /* The VxWorks PLT is a loaded section with contents. */
2637 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2638 return bfd_set_section_flags (abfd, s, flags);
2639 }
2640
2641 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2642
2643 static void
2644 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2645 struct elf_link_hash_entry *dir,
2646 struct elf_link_hash_entry *ind)
2647 {
2648 struct ppc_elf_link_hash_entry *edir, *eind;
2649
2650 edir = (struct ppc_elf_link_hash_entry *) dir;
2651 eind = (struct ppc_elf_link_hash_entry *) ind;
2652
2653 if (eind->dyn_relocs != NULL)
2654 {
2655 if (edir->dyn_relocs != NULL)
2656 {
2657 struct ppc_elf_dyn_relocs **pp;
2658 struct ppc_elf_dyn_relocs *p;
2659
2660 /* Add reloc counts against the indirect sym to the direct sym
2661 list. Merge any entries against the same section. */
2662 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2663 {
2664 struct ppc_elf_dyn_relocs *q;
2665
2666 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2667 if (q->sec == p->sec)
2668 {
2669 q->pc_count += p->pc_count;
2670 q->count += p->count;
2671 *pp = p->next;
2672 break;
2673 }
2674 if (q == NULL)
2675 pp = &p->next;
2676 }
2677 *pp = edir->dyn_relocs;
2678 }
2679
2680 edir->dyn_relocs = eind->dyn_relocs;
2681 eind->dyn_relocs = NULL;
2682 }
2683
2684 edir->tls_mask |= eind->tls_mask;
2685 edir->has_sda_refs |= eind->has_sda_refs;
2686
2687 /* If called to transfer flags for a weakdef during processing
2688 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2689 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2690 if (!(ELIMINATE_COPY_RELOCS
2691 && eind->elf.root.type != bfd_link_hash_indirect
2692 && edir->elf.dynamic_adjusted))
2693 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2694
2695 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2696 edir->elf.ref_regular |= eind->elf.ref_regular;
2697 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2698 edir->elf.needs_plt |= eind->elf.needs_plt;
2699 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2700
2701 /* If we were called to copy over info for a weak sym, that's all. */
2702 if (eind->elf.root.type != bfd_link_hash_indirect)
2703 return;
2704
2705 /* Copy over the GOT refcount entries that we may have already seen to
2706 the symbol which just became indirect. */
2707 edir->elf.got.refcount += eind->elf.got.refcount;
2708 eind->elf.got.refcount = 0;
2709
2710 /* And plt entries. */
2711 if (eind->elf.plt.plist != NULL)
2712 {
2713 if (edir->elf.plt.plist != NULL)
2714 {
2715 struct plt_entry **entp;
2716 struct plt_entry *ent;
2717
2718 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2719 {
2720 struct plt_entry *dent;
2721
2722 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2723 if (dent->sec == ent->sec && dent->addend == ent->addend)
2724 {
2725 dent->plt.refcount += ent->plt.refcount;
2726 *entp = ent->next;
2727 break;
2728 }
2729 if (dent == NULL)
2730 entp = &ent->next;
2731 }
2732 *entp = edir->elf.plt.plist;
2733 }
2734
2735 edir->elf.plt.plist = eind->elf.plt.plist;
2736 eind->elf.plt.plist = NULL;
2737 }
2738
2739 if (eind->elf.dynindx != -1)
2740 {
2741 if (edir->elf.dynindx != -1)
2742 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2743 edir->elf.dynstr_index);
2744 edir->elf.dynindx = eind->elf.dynindx;
2745 edir->elf.dynstr_index = eind->elf.dynstr_index;
2746 eind->elf.dynindx = -1;
2747 eind->elf.dynstr_index = 0;
2748 }
2749 }
2750
2751 /* Hook called by the linker routine which adds symbols from an object
2752 file. We use it to put .comm items in .sbss, and not .bss. */
2753
2754 static bfd_boolean
2755 ppc_elf_add_symbol_hook (bfd *abfd,
2756 struct bfd_link_info *info,
2757 Elf_Internal_Sym *sym,
2758 const char **namep ATTRIBUTE_UNUSED,
2759 flagword *flagsp ATTRIBUTE_UNUSED,
2760 asection **secp,
2761 bfd_vma *valp)
2762 {
2763 if (sym->st_shndx == SHN_COMMON
2764 && !info->relocatable
2765 && is_ppc_elf (info->output_bfd)
2766 && sym->st_size <= elf_gp_size (abfd))
2767 {
2768 /* Common symbols less than or equal to -G nn bytes are automatically
2769 put into .sbss. */
2770 struct ppc_elf_link_hash_table *htab;
2771
2772 htab = ppc_elf_hash_table (info);
2773 if (htab->sbss == NULL)
2774 {
2775 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2776
2777 if (!htab->elf.dynobj)
2778 htab->elf.dynobj = abfd;
2779
2780 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2781 ".sbss",
2782 flags);
2783 if (htab->sbss == NULL)
2784 return FALSE;
2785 }
2786
2787 *secp = htab->sbss;
2788 *valp = sym->st_size;
2789 }
2790
2791 return TRUE;
2792 }
2793 \f
2794 static bfd_boolean
2795 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2796 elf_linker_section_t *lsect)
2797 {
2798 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2799 TRUE, FALSE, TRUE);
2800 if (lsect->sym == NULL)
2801 return FALSE;
2802 if (lsect->sym->root.type == bfd_link_hash_new)
2803 lsect->sym->non_elf = 0;
2804 lsect->sym->ref_regular = 1;
2805 return TRUE;
2806 }
2807
2808 /* Create a special linker section. */
2809
2810 static bfd_boolean
2811 ppc_elf_create_linker_section (bfd *abfd,
2812 struct bfd_link_info *info,
2813 flagword flags,
2814 elf_linker_section_t *lsect)
2815 {
2816 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2817 asection *s;
2818
2819 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2820 | SEC_LINKER_CREATED);
2821
2822 /* Record the first bfd that needs the special sections. */
2823 if (!htab->elf.dynobj)
2824 htab->elf.dynobj = abfd;
2825
2826 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2827 lsect->name,
2828 flags);
2829 if (s == NULL
2830 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2831 return FALSE;
2832 lsect->section = s;
2833
2834 return create_sdata_sym (htab, lsect);
2835 }
2836
2837 /* Find a linker generated pointer with a given addend and type. */
2838
2839 static elf_linker_section_pointers_t *
2840 elf_find_pointer_linker_section
2841 (elf_linker_section_pointers_t *linker_pointers,
2842 bfd_vma addend,
2843 elf_linker_section_t *lsect)
2844 {
2845 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2846 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2847 return linker_pointers;
2848
2849 return NULL;
2850 }
2851
2852 /* Allocate a pointer to live in a linker created section. */
2853
2854 static bfd_boolean
2855 elf_create_pointer_linker_section (bfd *abfd,
2856 elf_linker_section_t *lsect,
2857 struct elf_link_hash_entry *h,
2858 const Elf_Internal_Rela *rel)
2859 {
2860 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2861 elf_linker_section_pointers_t *linker_section_ptr;
2862 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2863 bfd_size_type amt;
2864
2865 BFD_ASSERT (lsect != NULL);
2866
2867 /* Is this a global symbol? */
2868 if (h != NULL)
2869 {
2870 struct ppc_elf_link_hash_entry *eh;
2871
2872 /* Has this symbol already been allocated? If so, our work is done. */
2873 eh = (struct ppc_elf_link_hash_entry *) h;
2874 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2875 rel->r_addend,
2876 lsect))
2877 return TRUE;
2878
2879 ptr_linker_section_ptr = &eh->linker_section_pointer;
2880 }
2881 else
2882 {
2883 BFD_ASSERT (is_ppc_elf (abfd));
2884
2885 /* Allocation of a pointer to a local symbol. */
2886 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2887
2888 /* Allocate a table to hold the local symbols if first time. */
2889 if (!ptr)
2890 {
2891 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2892
2893 amt = num_symbols;
2894 amt *= sizeof (elf_linker_section_pointers_t *);
2895 ptr = bfd_zalloc (abfd, amt);
2896
2897 if (!ptr)
2898 return FALSE;
2899
2900 elf_local_ptr_offsets (abfd) = ptr;
2901 }
2902
2903 /* Has this symbol already been allocated? If so, our work is done. */
2904 if (elf_find_pointer_linker_section (ptr[r_symndx],
2905 rel->r_addend,
2906 lsect))
2907 return TRUE;
2908
2909 ptr_linker_section_ptr = &ptr[r_symndx];
2910 }
2911
2912 /* Allocate space for a pointer in the linker section, and allocate
2913 a new pointer record from internal memory. */
2914 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2915 amt = sizeof (elf_linker_section_pointers_t);
2916 linker_section_ptr = bfd_alloc (abfd, amt);
2917
2918 if (!linker_section_ptr)
2919 return FALSE;
2920
2921 linker_section_ptr->next = *ptr_linker_section_ptr;
2922 linker_section_ptr->addend = rel->r_addend;
2923 linker_section_ptr->lsect = lsect;
2924 *ptr_linker_section_ptr = linker_section_ptr;
2925
2926 linker_section_ptr->offset = lsect->section->size;
2927 lsect->section->size += 4;
2928
2929 #ifdef DEBUG
2930 fprintf (stderr,
2931 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2932 lsect->name, (long) linker_section_ptr->offset,
2933 (long) lsect->section->size);
2934 #endif
2935
2936 return TRUE;
2937 }
2938
2939 static bfd_boolean
2940 update_local_sym_info (bfd *abfd,
2941 Elf_Internal_Shdr *symtab_hdr,
2942 unsigned long r_symndx,
2943 int tls_type)
2944 {
2945 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2946 char *local_got_tls_masks;
2947
2948 if (local_got_refcounts == NULL)
2949 {
2950 bfd_size_type size = symtab_hdr->sh_info;
2951
2952 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2953 local_got_refcounts = bfd_zalloc (abfd, size);
2954 if (local_got_refcounts == NULL)
2955 return FALSE;
2956 elf_local_got_refcounts (abfd) = local_got_refcounts;
2957 }
2958
2959 local_got_refcounts[r_symndx] += 1;
2960 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2961 local_got_tls_masks[r_symndx] |= tls_type;
2962 return TRUE;
2963 }
2964
2965 static bfd_boolean
2966 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2967 asection *sec, bfd_vma addend)
2968 {
2969 struct plt_entry *ent;
2970
2971 if (addend < 32768)
2972 sec = NULL;
2973 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2974 if (ent->sec == sec && ent->addend == addend)
2975 break;
2976 if (ent == NULL)
2977 {
2978 bfd_size_type amt = sizeof (*ent);
2979 ent = bfd_alloc (abfd, amt);
2980 if (ent == NULL)
2981 return FALSE;
2982 ent->next = h->plt.plist;
2983 ent->sec = sec;
2984 ent->addend = addend;
2985 ent->plt.refcount = 0;
2986 h->plt.plist = ent;
2987 }
2988 ent->plt.refcount += 1;
2989 return TRUE;
2990 }
2991
2992 static struct plt_entry *
2993 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2994 {
2995 struct plt_entry *ent;
2996
2997 if (addend < 32768)
2998 sec = NULL;
2999 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3000 if (ent->sec == sec && ent->addend == addend)
3001 break;
3002 return ent;
3003 }
3004
3005 static void
3006 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3007 {
3008 (*_bfd_error_handler)
3009 (_("%B: relocation %s cannot be used when making a shared object"),
3010 abfd,
3011 ppc_elf_howto_table[r_type]->name);
3012 bfd_set_error (bfd_error_bad_value);
3013 }
3014
3015 /* Look through the relocs for a section during the first phase, and
3016 allocate space in the global offset table or procedure linkage
3017 table. */
3018
3019 static bfd_boolean
3020 ppc_elf_check_relocs (bfd *abfd,
3021 struct bfd_link_info *info,
3022 asection *sec,
3023 const Elf_Internal_Rela *relocs)
3024 {
3025 struct ppc_elf_link_hash_table *htab;
3026 Elf_Internal_Shdr *symtab_hdr;
3027 struct elf_link_hash_entry **sym_hashes;
3028 const Elf_Internal_Rela *rel;
3029 const Elf_Internal_Rela *rel_end;
3030 asection *got2, *sreloc;
3031
3032 if (info->relocatable)
3033 return TRUE;
3034
3035 /* Don't do anything special with non-loaded, non-alloced sections.
3036 In particular, any relocs in such sections should not affect GOT
3037 and PLT reference counting (ie. we don't allow them to create GOT
3038 or PLT entries), there's no possibility or desire to optimize TLS
3039 relocs, and there's not much point in propagating relocs to shared
3040 libs that the dynamic linker won't relocate. */
3041 if ((sec->flags & SEC_ALLOC) == 0)
3042 return TRUE;
3043
3044 #ifdef DEBUG
3045 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3046 sec, abfd);
3047 #endif
3048
3049 BFD_ASSERT (is_ppc_elf (abfd));
3050
3051 /* Initialize howto table if not already done. */
3052 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3053 ppc_elf_howto_init ();
3054
3055 htab = ppc_elf_hash_table (info);
3056 symtab_hdr = &elf_symtab_hdr (abfd);
3057 sym_hashes = elf_sym_hashes (abfd);
3058 got2 = bfd_get_section_by_name (abfd, ".got2");
3059 sreloc = NULL;
3060
3061 rel_end = relocs + sec->reloc_count;
3062 for (rel = relocs; rel < rel_end; rel++)
3063 {
3064 unsigned long r_symndx;
3065 enum elf_ppc_reloc_type r_type;
3066 struct elf_link_hash_entry *h;
3067 int tls_type = 0;
3068
3069 r_symndx = ELF32_R_SYM (rel->r_info);
3070 if (r_symndx < symtab_hdr->sh_info)
3071 h = NULL;
3072 else
3073 {
3074 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3075 while (h->root.type == bfd_link_hash_indirect
3076 || h->root.type == bfd_link_hash_warning)
3077 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3078 }
3079
3080 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3081 This shows up in particular in an R_PPC_ADDR32 in the eabi
3082 startup code. */
3083 if (h != NULL
3084 && htab->got == NULL
3085 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3086 {
3087 if (htab->elf.dynobj == NULL)
3088 htab->elf.dynobj = abfd;
3089 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3090 return FALSE;
3091 BFD_ASSERT (h == htab->elf.hgot);
3092 }
3093
3094 r_type = ELF32_R_TYPE (rel->r_info);
3095 switch (r_type)
3096 {
3097 case R_PPC_GOT_TLSLD16:
3098 case R_PPC_GOT_TLSLD16_LO:
3099 case R_PPC_GOT_TLSLD16_HI:
3100 case R_PPC_GOT_TLSLD16_HA:
3101 tls_type = TLS_TLS | TLS_LD;
3102 goto dogottls;
3103
3104 case R_PPC_GOT_TLSGD16:
3105 case R_PPC_GOT_TLSGD16_LO:
3106 case R_PPC_GOT_TLSGD16_HI:
3107 case R_PPC_GOT_TLSGD16_HA:
3108 tls_type = TLS_TLS | TLS_GD;
3109 goto dogottls;
3110
3111 case R_PPC_GOT_TPREL16:
3112 case R_PPC_GOT_TPREL16_LO:
3113 case R_PPC_GOT_TPREL16_HI:
3114 case R_PPC_GOT_TPREL16_HA:
3115 if (info->shared)
3116 info->flags |= DF_STATIC_TLS;
3117 tls_type = TLS_TLS | TLS_TPREL;
3118 goto dogottls;
3119
3120 case R_PPC_GOT_DTPREL16:
3121 case R_PPC_GOT_DTPREL16_LO:
3122 case R_PPC_GOT_DTPREL16_HI:
3123 case R_PPC_GOT_DTPREL16_HA:
3124 tls_type = TLS_TLS | TLS_DTPREL;
3125 dogottls:
3126 sec->has_tls_reloc = 1;
3127 /* Fall thru */
3128
3129 /* GOT16 relocations */
3130 case R_PPC_GOT16:
3131 case R_PPC_GOT16_LO:
3132 case R_PPC_GOT16_HI:
3133 case R_PPC_GOT16_HA:
3134 /* This symbol requires a global offset table entry. */
3135 if (htab->got == NULL)
3136 {
3137 if (htab->elf.dynobj == NULL)
3138 htab->elf.dynobj = abfd;
3139 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3140 return FALSE;
3141 }
3142 if (h != NULL)
3143 {
3144 h->got.refcount += 1;
3145 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3146 }
3147 else
3148 /* This is a global offset table entry for a local symbol. */
3149 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3150 return FALSE;
3151 break;
3152
3153 /* Indirect .sdata relocation. */
3154 case R_PPC_EMB_SDAI16:
3155 if (info->shared)
3156 {
3157 bad_shared_reloc (abfd, r_type);
3158 return FALSE;
3159 }
3160 if (htab->sdata[0].section == NULL
3161 && !ppc_elf_create_linker_section (abfd, info, 0,
3162 &htab->sdata[0]))
3163 return FALSE;
3164 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3165 h, rel))
3166 return FALSE;
3167 if (h != NULL)
3168 {
3169 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3170 h->non_got_ref = TRUE;
3171 }
3172 break;
3173
3174 /* Indirect .sdata2 relocation. */
3175 case R_PPC_EMB_SDA2I16:
3176 if (info->shared)
3177 {
3178 bad_shared_reloc (abfd, r_type);
3179 return FALSE;
3180 }
3181 if (htab->sdata[1].section == NULL
3182 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3183 &htab->sdata[1]))
3184 return FALSE;
3185 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3186 h, rel))
3187 return FALSE;
3188 if (h != NULL)
3189 {
3190 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3191 h->non_got_ref = TRUE;
3192 }
3193 break;
3194
3195 case R_PPC_SDAREL16:
3196 if (info->shared)
3197 {
3198 bad_shared_reloc (abfd, r_type);
3199 return FALSE;
3200 }
3201 if (htab->sdata[0].sym == NULL
3202 && !create_sdata_sym (htab, &htab->sdata[0]))
3203 return FALSE;
3204 if (h != NULL)
3205 {
3206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3207 h->non_got_ref = TRUE;
3208 }
3209 break;
3210
3211 case R_PPC_EMB_SDA2REL:
3212 if (info->shared)
3213 {
3214 bad_shared_reloc (abfd, r_type);
3215 return FALSE;
3216 }
3217 if (htab->sdata[1].sym == NULL
3218 && !create_sdata_sym (htab, &htab->sdata[1]))
3219 return FALSE;
3220 if (h != NULL)
3221 {
3222 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3223 h->non_got_ref = TRUE;
3224 }
3225 break;
3226
3227 case R_PPC_EMB_SDA21:
3228 case R_PPC_EMB_RELSDA:
3229 if (info->shared)
3230 {
3231 bad_shared_reloc (abfd, r_type);
3232 return FALSE;
3233 }
3234 if (htab->sdata[0].sym == NULL
3235 && !create_sdata_sym (htab, &htab->sdata[0]))
3236 return FALSE;
3237 if (htab->sdata[1].sym == NULL
3238 && !create_sdata_sym (htab, &htab->sdata[1]))
3239 return FALSE;
3240 if (h != NULL)
3241 {
3242 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3243 h->non_got_ref = TRUE;
3244 }
3245 break;
3246
3247 case R_PPC_EMB_NADDR32:
3248 case R_PPC_EMB_NADDR16:
3249 case R_PPC_EMB_NADDR16_LO:
3250 case R_PPC_EMB_NADDR16_HI:
3251 case R_PPC_EMB_NADDR16_HA:
3252 if (info->shared)
3253 {
3254 bad_shared_reloc (abfd, r_type);
3255 return FALSE;
3256 }
3257 if (h != NULL)
3258 h->non_got_ref = TRUE;
3259 break;
3260
3261 case R_PPC_PLT32:
3262 case R_PPC_PLTREL24:
3263 case R_PPC_PLTREL32:
3264 case R_PPC_PLT16_LO:
3265 case R_PPC_PLT16_HI:
3266 case R_PPC_PLT16_HA:
3267 #ifdef DEBUG
3268 fprintf (stderr, "Reloc requires a PLT entry\n");
3269 #endif
3270 /* This symbol requires a procedure linkage table entry. We
3271 actually build the entry in finish_dynamic_symbol,
3272 because this might be a case of linking PIC code without
3273 linking in any dynamic objects, in which case we don't
3274 need to generate a procedure linkage table after all. */
3275
3276 if (h == NULL)
3277 {
3278 /* It does not make sense to have a procedure linkage
3279 table entry for a local symbol. */
3280 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3281 "local symbol"),
3282 abfd,
3283 sec,
3284 (long) rel->r_offset,
3285 ppc_elf_howto_table[r_type]->name);
3286 bfd_set_error (bfd_error_bad_value);
3287 return FALSE;
3288 }
3289 else
3290 {
3291 bfd_vma addend = 0;
3292
3293 if (r_type == R_PPC_PLTREL24)
3294 {
3295 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3296 addend = rel->r_addend;
3297 }
3298 h->needs_plt = 1;
3299 if (!update_plt_info (abfd, h, got2, addend))
3300 return FALSE;
3301 }
3302 break;
3303
3304 /* The following relocations don't need to propagate the
3305 relocation if linking a shared object since they are
3306 section relative. */
3307 case R_PPC_SECTOFF:
3308 case R_PPC_SECTOFF_LO:
3309 case R_PPC_SECTOFF_HI:
3310 case R_PPC_SECTOFF_HA:
3311 case R_PPC_DTPREL16:
3312 case R_PPC_DTPREL16_LO:
3313 case R_PPC_DTPREL16_HI:
3314 case R_PPC_DTPREL16_HA:
3315 case R_PPC_TOC16:
3316 break;
3317
3318 case R_PPC_REL16:
3319 case R_PPC_REL16_LO:
3320 case R_PPC_REL16_HI:
3321 case R_PPC_REL16_HA:
3322 ppc_elf_tdata (abfd)->has_rel16 = 1;
3323 break;
3324
3325 /* These are just markers. */
3326 case R_PPC_TLS:
3327 case R_PPC_EMB_MRKREF:
3328 case R_PPC_NONE:
3329 case R_PPC_max:
3330 break;
3331
3332 /* These should only appear in dynamic objects. */
3333 case R_PPC_COPY:
3334 case R_PPC_GLOB_DAT:
3335 case R_PPC_JMP_SLOT:
3336 case R_PPC_RELATIVE:
3337 break;
3338
3339 /* These aren't handled yet. We'll report an error later. */
3340 case R_PPC_ADDR30:
3341 case R_PPC_EMB_RELSEC16:
3342 case R_PPC_EMB_RELST_LO:
3343 case R_PPC_EMB_RELST_HI:
3344 case R_PPC_EMB_RELST_HA:
3345 case R_PPC_EMB_BIT_FLD:
3346 break;
3347
3348 /* This refers only to functions defined in the shared library. */
3349 case R_PPC_LOCAL24PC:
3350 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351 {
3352 htab->plt_type = PLT_OLD;
3353 htab->old_bfd = abfd;
3354 }
3355 break;
3356
3357 /* This relocation describes the C++ object vtable hierarchy.
3358 Reconstruct it for later use during GC. */
3359 case R_PPC_GNU_VTINHERIT:
3360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3361 return FALSE;
3362 break;
3363
3364 /* This relocation describes which C++ vtable entries are actually
3365 used. Record for later use during GC. */
3366 case R_PPC_GNU_VTENTRY:
3367 BFD_ASSERT (h != NULL);
3368 if (h != NULL
3369 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3370 return FALSE;
3371 break;
3372
3373 /* We shouldn't really be seeing these. */
3374 case R_PPC_TPREL32:
3375 if (info->shared)
3376 info->flags |= DF_STATIC_TLS;
3377 goto dodyn;
3378
3379 /* Nor these. */
3380 case R_PPC_DTPMOD32:
3381 case R_PPC_DTPREL32:
3382 goto dodyn;
3383
3384 case R_PPC_TPREL16:
3385 case R_PPC_TPREL16_LO:
3386 case R_PPC_TPREL16_HI:
3387 case R_PPC_TPREL16_HA:
3388 if (info->shared)
3389 info->flags |= DF_STATIC_TLS;
3390 goto dodyn;
3391
3392 case R_PPC_REL32:
3393 if (h == NULL
3394 && got2 != NULL
3395 && (sec->flags & SEC_CODE) != 0
3396 && (info->shared || info->pie)
3397 && htab->plt_type == PLT_UNSET)
3398 {
3399 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3400 the start of a function, which assembles to a REL32
3401 reference to .got2. If we detect one of these, then
3402 force the old PLT layout because the linker cannot
3403 reliably deduce the GOT pointer value needed for
3404 PLT call stubs. */
3405 asection *s;
3406
3407 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3408 r_symndx);
3409 if (s == got2)
3410 {
3411 htab->plt_type = PLT_OLD;
3412 htab->old_bfd = abfd;
3413 }
3414 }
3415 if (h == NULL || h == htab->elf.hgot)
3416 break;
3417 /* fall through */
3418
3419 case R_PPC_ADDR32:
3420 case R_PPC_ADDR16:
3421 case R_PPC_ADDR16_LO:
3422 case R_PPC_ADDR16_HI:
3423 case R_PPC_ADDR16_HA:
3424 case R_PPC_UADDR32:
3425 case R_PPC_UADDR16:
3426 if (h != NULL && !info->shared)
3427 {
3428 /* We may need a plt entry if the symbol turns out to be
3429 a function defined in a dynamic object. */
3430 if (!update_plt_info (abfd, h, NULL, 0))
3431 return FALSE;
3432
3433 /* We may need a copy reloc too. */
3434 h->non_got_ref = 1;
3435 h->pointer_equality_needed = 1;
3436 }
3437 goto dodyn;
3438
3439 case R_PPC_REL24:
3440 case R_PPC_REL14:
3441 case R_PPC_REL14_BRTAKEN:
3442 case R_PPC_REL14_BRNTAKEN:
3443 if (h == NULL)
3444 break;
3445 if (h == htab->elf.hgot)
3446 {
3447 if (htab->plt_type == PLT_UNSET)
3448 {
3449 htab->plt_type = PLT_OLD;
3450 htab->old_bfd = abfd;
3451 }
3452 break;
3453 }
3454 /* fall through */
3455
3456 case R_PPC_ADDR24:
3457 case R_PPC_ADDR14:
3458 case R_PPC_ADDR14_BRTAKEN:
3459 case R_PPC_ADDR14_BRNTAKEN:
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 break;
3467 }
3468
3469 dodyn:
3470 /* If we are creating a shared library, and this is a reloc
3471 against a global symbol, or a non PC relative reloc
3472 against a local symbol, then we need to copy the reloc
3473 into the shared library. However, if we are linking with
3474 -Bsymbolic, we do not need to copy a reloc against a
3475 global symbol which is defined in an object we are
3476 including in the link (i.e., DEF_REGULAR is set). At
3477 this point we have not seen all the input files, so it is
3478 possible that DEF_REGULAR is not set now but will be set
3479 later (it is never cleared). In case of a weak definition,
3480 DEF_REGULAR may be cleared later by a strong definition in
3481 a shared library. We account for that possibility below by
3482 storing information in the dyn_relocs field of the hash
3483 table entry. A similar situation occurs when creating
3484 shared libraries and symbol visibility changes render the
3485 symbol local.
3486
3487 If on the other hand, we are creating an executable, we
3488 may need to keep relocations for symbols satisfied by a
3489 dynamic library if we manage to avoid copy relocs for the
3490 symbol. */
3491 if ((info->shared
3492 && (MUST_BE_DYN_RELOC (r_type)
3493 || (h != NULL
3494 && (! info->symbolic
3495 || h->root.type == bfd_link_hash_defweak
3496 || !h->def_regular))))
3497 || (ELIMINATE_COPY_RELOCS
3498 && !info->shared
3499 && h != NULL
3500 && (h->root.type == bfd_link_hash_defweak
3501 || !h->def_regular)))
3502 {
3503 struct ppc_elf_dyn_relocs *p;
3504 struct ppc_elf_dyn_relocs **head;
3505
3506 #ifdef DEBUG
3507 fprintf (stderr,
3508 "ppc_elf_check_relocs needs to "
3509 "create relocation for %s\n",
3510 (h && h->root.root.string
3511 ? h->root.root.string : "<unknown>"));
3512 #endif
3513 if (sreloc == NULL)
3514 {
3515 const char *name;
3516
3517 name = (bfd_elf_string_from_elf_section
3518 (abfd,
3519 elf_elfheader (abfd)->e_shstrndx,
3520 elf_section_data (sec)->rel_hdr.sh_name));
3521 if (name == NULL)
3522 return FALSE;
3523
3524 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3525 && strcmp (bfd_get_section_name (abfd, sec),
3526 name + 5) == 0);
3527
3528 if (htab->elf.dynobj == NULL)
3529 htab->elf.dynobj = abfd;
3530 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3531 if (sreloc == NULL)
3532 {
3533 flagword flags;
3534
3535 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3536 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3537 | SEC_ALLOC | SEC_LOAD);
3538 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3539 name,
3540 flags);
3541 if (sreloc == NULL
3542 || ! bfd_set_section_alignment (htab->elf.dynobj,
3543 sreloc, 2))
3544 return FALSE;
3545 }
3546 elf_section_data (sec)->sreloc = sreloc;
3547 }
3548
3549 /* If this is a global symbol, we count the number of
3550 relocations we need for this symbol. */
3551 if (h != NULL)
3552 {
3553 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3554 }
3555 else
3556 {
3557 /* Track dynamic relocs needed for local syms too.
3558 We really need local syms available to do this
3559 easily. Oh well. */
3560
3561 asection *s;
3562 void *vpp;
3563
3564 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3565 sec, r_symndx);
3566 if (s == NULL)
3567 return FALSE;
3568
3569 vpp = &elf_section_data (s)->local_dynrel;
3570 head = (struct ppc_elf_dyn_relocs **) vpp;
3571 }
3572
3573 p = *head;
3574 if (p == NULL || p->sec != sec)
3575 {
3576 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3577 if (p == NULL)
3578 return FALSE;
3579 p->next = *head;
3580 *head = p;
3581 p->sec = sec;
3582 p->count = 0;
3583 p->pc_count = 0;
3584 }
3585
3586 p->count += 1;
3587 if (!MUST_BE_DYN_RELOC (r_type))
3588 p->pc_count += 1;
3589 }
3590
3591 break;
3592 }
3593 }
3594
3595 return TRUE;
3596 }
3597 \f
3598
3599 /* Merge object attributes from IBFD into OBFD. Raise an error if
3600 there are conflicting attributes. */
3601 static bfd_boolean
3602 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3603 {
3604 obj_attribute *in_attr, *in_attrs;
3605 obj_attribute *out_attr, *out_attrs;
3606
3607 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3608 {
3609 /* This is the first object. Copy the attributes. */
3610 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3611
3612 /* Use the Tag_null value to indicate the attributes have been
3613 initialized. */
3614 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3615
3616 return TRUE;
3617 }
3618
3619 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3620 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3621
3622 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3623 non-conflicting ones. */
3624 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3625 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3626 if (in_attr->i != out_attr->i)
3627 {
3628 out_attr->type = 1;
3629 if (out_attr->i == 0)
3630 out_attr->i = in_attr->i;
3631 else if (in_attr->i == 0)
3632 ;
3633 else if (out_attr->i == 1 && in_attr->i == 2)
3634 _bfd_error_handler
3635 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3636 else if (out_attr->i == 2 && in_attr->i == 1)
3637 _bfd_error_handler
3638 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3639 else if (in_attr->i > 2)
3640 _bfd_error_handler
3641 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3642 in_attr->i);
3643 else
3644 _bfd_error_handler
3645 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3646 out_attr->i);
3647 }
3648
3649 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3650 merge non-conflicting ones. */
3651 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3652 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3653 if (in_attr->i != out_attr->i)
3654 {
3655 const char *in_abi = NULL, *out_abi = NULL;
3656
3657 switch (in_attr->i)
3658 {
3659 case 1: in_abi = "generic"; break;
3660 case 2: in_abi = "AltiVec"; break;
3661 case 3: in_abi = "SPE"; break;
3662 }
3663
3664 switch (out_attr->i)
3665 {
3666 case 1: out_abi = "generic"; break;
3667 case 2: out_abi = "AltiVec"; break;
3668 case 3: out_abi = "SPE"; break;
3669 }
3670
3671 out_attr->type = 1;
3672 if (out_attr->i == 0)
3673 out_attr->i = in_attr->i;
3674 else if (in_attr->i == 0)
3675 ;
3676 /* For now, allow generic to transition to AltiVec or SPE
3677 without a warning. If GCC marked files with their stack
3678 alignment and used don't-care markings for files which are
3679 not affected by the vector ABI, we could warn about this
3680 case too. */
3681 else if (out_attr->i == 1)
3682 out_attr->i = in_attr->i;
3683 else if (in_attr->i == 1)
3684 ;
3685 else if (in_abi == NULL)
3686 _bfd_error_handler
3687 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3688 in_attr->i);
3689 else if (out_abi == NULL)
3690 _bfd_error_handler
3691 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3692 in_attr->i);
3693 else
3694 _bfd_error_handler
3695 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3696 ibfd, obfd, in_abi, out_abi);
3697 }
3698
3699 /* Merge Tag_compatibility attributes and any common GNU ones. */
3700 _bfd_elf_merge_object_attributes (ibfd, obfd);
3701
3702 return TRUE;
3703 }
3704
3705 /* Merge backend specific data from an object file to the output
3706 object file when linking. */
3707
3708 static bfd_boolean
3709 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3710 {
3711 flagword old_flags;
3712 flagword new_flags;
3713 bfd_boolean error;
3714
3715 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3716 return TRUE;
3717
3718 /* Check if we have the same endianess. */
3719 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3720 return FALSE;
3721
3722 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3723 return FALSE;
3724
3725 new_flags = elf_elfheader (ibfd)->e_flags;
3726 old_flags = elf_elfheader (obfd)->e_flags;
3727 if (!elf_flags_init (obfd))
3728 {
3729 /* First call, no flags set. */
3730 elf_flags_init (obfd) = TRUE;
3731 elf_elfheader (obfd)->e_flags = new_flags;
3732 }
3733
3734 /* Compatible flags are ok. */
3735 else if (new_flags == old_flags)
3736 ;
3737
3738 /* Incompatible flags. */
3739 else
3740 {
3741 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3742 to be linked with either. */
3743 error = FALSE;
3744 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3745 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3746 {
3747 error = TRUE;
3748 (*_bfd_error_handler)
3749 (_("%B: compiled with -mrelocatable and linked with "
3750 "modules compiled normally"), ibfd);
3751 }
3752 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3753 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3754 {
3755 error = TRUE;
3756 (*_bfd_error_handler)
3757 (_("%B: compiled normally and linked with "
3758 "modules compiled with -mrelocatable"), ibfd);
3759 }
3760
3761 /* The output is -mrelocatable-lib iff both the input files are. */
3762 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3763 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3764
3765 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3766 but each input file is either -mrelocatable or -mrelocatable-lib. */
3767 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3768 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3769 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3770 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3771
3772 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3773 any module uses it. */
3774 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3775
3776 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3777 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3778
3779 /* Warn about any other mismatches. */
3780 if (new_flags != old_flags)
3781 {
3782 error = TRUE;
3783 (*_bfd_error_handler)
3784 (_("%B: uses different e_flags (0x%lx) fields "
3785 "than previous modules (0x%lx)"),
3786 ibfd, (long) new_flags, (long) old_flags);
3787 }
3788
3789 if (error)
3790 {
3791 bfd_set_error (bfd_error_bad_value);
3792 return FALSE;
3793 }
3794 }
3795
3796 return TRUE;
3797 }
3798 \f
3799 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3800 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3801 int
3802 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3803 struct bfd_link_info *info,
3804 enum ppc_elf_plt_type plt_style,
3805 int emit_stub_syms)
3806 {
3807 struct ppc_elf_link_hash_table *htab;
3808 flagword flags;
3809
3810 htab = ppc_elf_hash_table (info);
3811
3812 if (htab->plt_type == PLT_UNSET)
3813 {
3814 if (plt_style == PLT_OLD)
3815 htab->plt_type = PLT_OLD;
3816 else
3817 {
3818 bfd *ibfd;
3819 enum ppc_elf_plt_type plt_type = plt_style;
3820
3821 /* Look through the reloc flags left by ppc_elf_check_relocs.
3822 Use the old style bss plt if a file makes plt calls
3823 without using the new relocs, and if ld isn't given
3824 --secure-plt and we never see REL16 relocs. */
3825 if (plt_type == PLT_UNSET)
3826 plt_type = PLT_OLD;
3827 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3828 if (is_ppc_elf (ibfd))
3829 {
3830 if (ppc_elf_tdata (ibfd)->has_rel16)
3831 plt_type = PLT_NEW;
3832 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3833 {
3834 plt_type = PLT_OLD;
3835 htab->old_bfd = ibfd;
3836 break;
3837 }
3838 }
3839 htab->plt_type = plt_type;
3840 }
3841 }
3842 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3843 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3844
3845 htab->emit_stub_syms = emit_stub_syms;
3846
3847 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3848
3849 if (htab->plt_type == PLT_NEW)
3850 {
3851 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3852 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3853
3854 /* The new PLT is a loaded section. */
3855 if (htab->plt != NULL
3856 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3857 return -1;
3858
3859 /* The new GOT is not executable. */
3860 if (htab->got != NULL
3861 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3862 return -1;
3863 }
3864 else
3865 {
3866 /* Stop an unused .glink section from affecting .text alignment. */
3867 if (htab->glink != NULL
3868 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3869 return -1;
3870 }
3871 return htab->plt_type == PLT_NEW;
3872 }
3873 \f
3874 /* Return the section that should be marked against GC for a given
3875 relocation. */
3876
3877 static asection *
3878 ppc_elf_gc_mark_hook (asection *sec,
3879 struct bfd_link_info *info,
3880 Elf_Internal_Rela *rel,
3881 struct elf_link_hash_entry *h,
3882 Elf_Internal_Sym *sym)
3883 {
3884 if (h != NULL)
3885 switch (ELF32_R_TYPE (rel->r_info))
3886 {
3887 case R_PPC_GNU_VTINHERIT:
3888 case R_PPC_GNU_VTENTRY:
3889 return NULL;
3890 }
3891
3892 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3893 }
3894
3895 /* Update the got, plt and dynamic reloc reference counts for the
3896 section being removed. */
3897
3898 static bfd_boolean
3899 ppc_elf_gc_sweep_hook (bfd *abfd,
3900 struct bfd_link_info *info,
3901 asection *sec,
3902 const Elf_Internal_Rela *relocs)
3903 {
3904 struct ppc_elf_link_hash_table *htab;
3905 Elf_Internal_Shdr *symtab_hdr;
3906 struct elf_link_hash_entry **sym_hashes;
3907 bfd_signed_vma *local_got_refcounts;
3908 const Elf_Internal_Rela *rel, *relend;
3909 asection *got2;
3910
3911 if (info->relocatable)
3912 return TRUE;
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_symtab_hdr (abfd);
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 case R_PPC_GOT_TLSGD16:
3961 case R_PPC_GOT_TLSGD16_LO:
3962 case R_PPC_GOT_TLSGD16_HI:
3963 case R_PPC_GOT_TLSGD16_HA:
3964 case R_PPC_GOT_TPREL16:
3965 case R_PPC_GOT_TPREL16_LO:
3966 case R_PPC_GOT_TPREL16_HI:
3967 case R_PPC_GOT_TPREL16_HA:
3968 case R_PPC_GOT_DTPREL16:
3969 case R_PPC_GOT_DTPREL16_LO:
3970 case R_PPC_GOT_DTPREL16_HI:
3971 case R_PPC_GOT_DTPREL16_HA:
3972 case R_PPC_GOT16:
3973 case R_PPC_GOT16_LO:
3974 case R_PPC_GOT16_HI:
3975 case R_PPC_GOT16_HA:
3976 if (h != NULL)
3977 {
3978 if (h->got.refcount > 0)
3979 h->got.refcount--;
3980 }
3981 else if (local_got_refcounts != NULL)
3982 {
3983 if (local_got_refcounts[r_symndx] > 0)
3984 local_got_refcounts[r_symndx]--;
3985 }
3986 break;
3987
3988 case R_PPC_REL24:
3989 case R_PPC_REL14:
3990 case R_PPC_REL14_BRTAKEN:
3991 case R_PPC_REL14_BRNTAKEN:
3992 case R_PPC_REL32:
3993 if (h == NULL || h == htab->elf.hgot)
3994 break;
3995 /* Fall thru */
3996
3997 case R_PPC_ADDR32:
3998 case R_PPC_ADDR24:
3999 case R_PPC_ADDR16:
4000 case R_PPC_ADDR16_LO:
4001 case R_PPC_ADDR16_HI:
4002 case R_PPC_ADDR16_HA:
4003 case R_PPC_ADDR14:
4004 case R_PPC_ADDR14_BRTAKEN:
4005 case R_PPC_ADDR14_BRNTAKEN:
4006 case R_PPC_UADDR32:
4007 case R_PPC_UADDR16:
4008 if (info->shared)
4009 break;
4010
4011 case R_PPC_PLT32:
4012 case R_PPC_PLTREL24:
4013 case R_PPC_PLTREL32:
4014 case R_PPC_PLT16_LO:
4015 case R_PPC_PLT16_HI:
4016 case R_PPC_PLT16_HA:
4017 if (h != NULL)
4018 {
4019 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4020 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4021 if (ent->plt.refcount > 0)
4022 ent->plt.refcount -= 1;
4023 }
4024 break;
4025
4026 default:
4027 break;
4028 }
4029 }
4030 return TRUE;
4031 }
4032 \f
4033 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4034
4035 asection *
4036 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4037 {
4038 struct ppc_elf_link_hash_table *htab;
4039
4040 htab = ppc_elf_hash_table (info);
4041 if (htab->plt_type == PLT_NEW
4042 && htab->plt != NULL
4043 && htab->plt->output_section != NULL)
4044 {
4045 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4046 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4047 }
4048
4049 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4050 FALSE, FALSE, TRUE);
4051 return _bfd_elf_tls_setup (obfd, info);
4052 }
4053
4054 /* Run through all the TLS relocs looking for optimization
4055 opportunities. */
4056
4057 bfd_boolean
4058 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4059 struct bfd_link_info *info)
4060 {
4061 bfd *ibfd;
4062 asection *sec;
4063 struct ppc_elf_link_hash_table *htab;
4064 int pass;
4065
4066 if (info->relocatable || info->shared)
4067 return TRUE;
4068
4069 htab = ppc_elf_hash_table (info);
4070 /* Make two passes through the relocs. First time check that tls
4071 relocs involved in setting up a tls_get_addr call are indeed
4072 followed by such a call. If they are not, exclude them from
4073 the optimizations done on the second pass. */
4074 for (pass = 0; pass < 2; ++pass)
4075 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4076 {
4077 Elf_Internal_Sym *locsyms = NULL;
4078 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4079
4080 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4081 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4082 {
4083 Elf_Internal_Rela *relstart, *rel, *relend;
4084
4085 /* Read the relocations. */
4086 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4087 info->keep_memory);
4088 if (relstart == NULL)
4089 return FALSE;
4090
4091 relend = relstart + sec->reloc_count;
4092 for (rel = relstart; rel < relend; rel++)
4093 {
4094 enum elf_ppc_reloc_type r_type;
4095 unsigned long r_symndx;
4096 struct elf_link_hash_entry *h = NULL;
4097 char *tls_mask;
4098 char tls_set, tls_clear;
4099 bfd_boolean is_local;
4100 int expecting_tls_get_addr;
4101 bfd_signed_vma *got_count;
4102
4103 r_symndx = ELF32_R_SYM (rel->r_info);
4104 if (r_symndx >= symtab_hdr->sh_info)
4105 {
4106 struct elf_link_hash_entry **sym_hashes;
4107
4108 sym_hashes = elf_sym_hashes (ibfd);
4109 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4110 while (h->root.type == bfd_link_hash_indirect
4111 || h->root.type == bfd_link_hash_warning)
4112 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4113 }
4114
4115 expecting_tls_get_addr = 0;
4116 is_local = FALSE;
4117 if (h == NULL
4118 || !h->def_dynamic)
4119 is_local = TRUE;
4120
4121 r_type = ELF32_R_TYPE (rel->r_info);
4122 switch (r_type)
4123 {
4124 case R_PPC_GOT_TLSLD16:
4125 case R_PPC_GOT_TLSLD16_LO:
4126 expecting_tls_get_addr = 1;
4127 /* Fall thru */
4128
4129 case R_PPC_GOT_TLSLD16_HI:
4130 case R_PPC_GOT_TLSLD16_HA:
4131 /* These relocs should never be against a symbol
4132 defined in a shared lib. Leave them alone if
4133 that turns out to be the case. */
4134 if (!is_local)
4135 continue;
4136
4137 /* LD -> LE */
4138 tls_set = 0;
4139 tls_clear = TLS_LD;
4140 break;
4141
4142 case R_PPC_GOT_TLSGD16:
4143 case R_PPC_GOT_TLSGD16_LO:
4144 expecting_tls_get_addr = 1;
4145 /* Fall thru */
4146
4147 case R_PPC_GOT_TLSGD16_HI:
4148 case R_PPC_GOT_TLSGD16_HA:
4149 if (is_local)
4150 /* GD -> LE */
4151 tls_set = 0;
4152 else
4153 /* GD -> IE */
4154 tls_set = TLS_TLS | TLS_TPRELGD;
4155 tls_clear = TLS_GD;
4156 break;
4157
4158 case R_PPC_GOT_TPREL16:
4159 case R_PPC_GOT_TPREL16_LO:
4160 case R_PPC_GOT_TPREL16_HI:
4161 case R_PPC_GOT_TPREL16_HA:
4162 if (is_local)
4163 {
4164 /* IE -> LE */
4165 tls_set = 0;
4166 tls_clear = TLS_TPREL;
4167 break;
4168 }
4169 else
4170 continue;
4171
4172 default:
4173 continue;
4174 }
4175
4176 if (pass == 0)
4177 {
4178 if (!expecting_tls_get_addr)
4179 continue;
4180
4181 if (rel + 1 < relend)
4182 {
4183 enum elf_ppc_reloc_type r_type2;
4184 unsigned long r_symndx2;
4185 struct elf_link_hash_entry *h2;
4186
4187 /* The next instruction should be a call to
4188 __tls_get_addr. Peek at the reloc to be sure. */
4189 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4190 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4191 if (r_symndx2 >= symtab_hdr->sh_info
4192 && (r_type2 == R_PPC_REL14
4193 || r_type2 == R_PPC_REL14_BRTAKEN
4194 || r_type2 == R_PPC_REL14_BRNTAKEN
4195 || r_type2 == R_PPC_REL24
4196 || r_type2 == R_PPC_PLTREL24))
4197 {
4198 struct elf_link_hash_entry **sym_hashes;
4199
4200 sym_hashes = elf_sym_hashes (ibfd);
4201 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4202 while (h2->root.type == bfd_link_hash_indirect
4203 || h2->root.type == bfd_link_hash_warning)
4204 h2 = ((struct elf_link_hash_entry *)
4205 h2->root.u.i.link);
4206 if (h2 == htab->tls_get_addr)
4207 continue;
4208 }
4209 }
4210
4211 /* Uh oh, we didn't find the expected call. We
4212 could just mark this symbol to exclude it
4213 from tls optimization but it's safer to skip
4214 the entire section. */
4215 sec->has_tls_reloc = 0;
4216 break;
4217 }
4218
4219 if (h != NULL)
4220 {
4221 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4222 got_count = &h->got.refcount;
4223 }
4224 else
4225 {
4226 Elf_Internal_Sym *sym;
4227 bfd_signed_vma *lgot_refs;
4228 char *lgot_masks;
4229
4230 if (locsyms == NULL)
4231 {
4232 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4233 if (locsyms == NULL)
4234 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4235 symtab_hdr->sh_info,
4236 0, NULL, NULL, NULL);
4237 if (locsyms == NULL)
4238 {
4239 if (elf_section_data (sec)->relocs != relstart)
4240 free (relstart);
4241 return FALSE;
4242 }
4243 }
4244 sym = locsyms + r_symndx;
4245 lgot_refs = elf_local_got_refcounts (ibfd);
4246 if (lgot_refs == NULL)
4247 abort ();
4248 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4249 tls_mask = &lgot_masks[r_symndx];
4250 got_count = &lgot_refs[r_symndx];
4251 }
4252
4253 if (tls_set == 0)
4254 {
4255 /* We managed to get rid of a got entry. */
4256 if (*got_count > 0)
4257 *got_count -= 1;
4258 }
4259
4260 if (expecting_tls_get_addr)
4261 {
4262 struct plt_entry *ent;
4263
4264 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4265 if (ent != NULL && ent->plt.refcount > 0)
4266 ent->plt.refcount -= 1;
4267 }
4268
4269 *tls_mask |= tls_set;
4270 *tls_mask &= ~tls_clear;
4271 }
4272
4273 if (elf_section_data (sec)->relocs != relstart)
4274 free (relstart);
4275 }
4276
4277 if (locsyms != NULL
4278 && (symtab_hdr->contents != (unsigned char *) locsyms))
4279 {
4280 if (!info->keep_memory)
4281 free (locsyms);
4282 else
4283 symtab_hdr->contents = (unsigned char *) locsyms;
4284 }
4285 }
4286 return TRUE;
4287 }
4288 \f
4289 /* Return true if we have dynamic relocs that apply to read-only sections. */
4290
4291 static bfd_boolean
4292 readonly_dynrelocs (struct elf_link_hash_entry *h)
4293 {
4294 struct ppc_elf_dyn_relocs *p;
4295
4296 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4297 {
4298 asection *s = p->sec->output_section;
4299
4300 if (s != NULL
4301 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4302 == (SEC_READONLY | SEC_ALLOC)))
4303 return TRUE;
4304 }
4305 return FALSE;
4306 }
4307
4308 /* Adjust a symbol defined by a dynamic object and referenced by a
4309 regular object. The current definition is in some section of the
4310 dynamic object, but we're not including those sections. We have to
4311 change the definition to something the rest of the link can
4312 understand. */
4313
4314 static bfd_boolean
4315 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4316 struct elf_link_hash_entry *h)
4317 {
4318 struct ppc_elf_link_hash_table *htab;
4319 asection *s;
4320
4321 #ifdef DEBUG
4322 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4323 h->root.root.string);
4324 #endif
4325
4326 /* Make sure we know what is going on here. */
4327 htab = ppc_elf_hash_table (info);
4328 BFD_ASSERT (htab->elf.dynobj != NULL
4329 && (h->needs_plt
4330 || h->u.weakdef != NULL
4331 || (h->def_dynamic
4332 && h->ref_regular
4333 && !h->def_regular)));
4334
4335 /* Deal with function syms. */
4336 if (h->type == STT_FUNC
4337 || h->needs_plt)
4338 {
4339 /* Clear procedure linkage table information for any symbol that
4340 won't need a .plt entry. */
4341 struct plt_entry *ent;
4342 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4343 if (ent->plt.refcount > 0)
4344 break;
4345 if (ent == NULL
4346 || SYMBOL_CALLS_LOCAL (info, h)
4347 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4348 && h->root.type == bfd_link_hash_undefweak))
4349 {
4350 /* A PLT entry is not required/allowed when:
4351
4352 1. We are not using ld.so; because then the PLT entry
4353 can't be set up, so we can't use one. In this case,
4354 ppc_elf_adjust_dynamic_symbol won't even be called.
4355
4356 2. GC has rendered the entry unused.
4357
4358 3. We know for certain that a call to this symbol
4359 will go to this object, or will remain undefined. */
4360 h->plt.plist = NULL;
4361 h->needs_plt = 0;
4362 }
4363 else
4364 {
4365 /* After adjust_dynamic_symbol, non_got_ref set means that
4366 dyn_relocs for this symbol should be discarded.
4367 If we get here we know we are making a PLT entry for this
4368 symbol, and in an executable we'd normally resolve
4369 relocations against this symbol to the PLT entry. Allow
4370 dynamic relocs if the reference is weak, and the dynamic
4371 relocs will not cause text relocation. */
4372 if (!h->ref_regular_nonweak
4373 && h->non_got_ref
4374 && !htab->is_vxworks
4375 && !ppc_elf_hash_entry (h)->has_sda_refs
4376 && !readonly_dynrelocs (h))
4377 h->non_got_ref = 0;
4378 }
4379 return TRUE;
4380 }
4381 else
4382 h->plt.plist = NULL;
4383
4384 /* If this is a weak symbol, and there is a real definition, the
4385 processor independent code will have arranged for us to see the
4386 real definition first, and we can just use the same value. */
4387 if (h->u.weakdef != NULL)
4388 {
4389 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4390 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4391 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4392 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4393 if (ELIMINATE_COPY_RELOCS)
4394 h->non_got_ref = h->u.weakdef->non_got_ref;
4395 return TRUE;
4396 }
4397
4398 /* This is a reference to a symbol defined by a dynamic object which
4399 is not a function. */
4400
4401 /* If we are creating a shared library, we must presume that the
4402 only references to the symbol are via the global offset table.
4403 For such cases we need not do anything here; the relocations will
4404 be handled correctly by relocate_section. */
4405 if (info->shared)
4406 return TRUE;
4407
4408 /* If there are no references to this symbol that do not use the
4409 GOT, we don't need to generate a copy reloc. */
4410 if (!h->non_got_ref)
4411 return TRUE;
4412
4413 /* If we didn't find any dynamic relocs in read-only sections, then
4414 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4415 We can't do this if there are any small data relocations. This
4416 doesn't work on VxWorks, where we can not have dynamic
4417 relocations (other than copy and jump slot relocations) in an
4418 executable. */
4419 if (ELIMINATE_COPY_RELOCS
4420 && !ppc_elf_hash_entry (h)->has_sda_refs
4421 && !htab->is_vxworks
4422 && !h->def_regular
4423 && !readonly_dynrelocs (h))
4424 {
4425 h->non_got_ref = 0;
4426 return TRUE;
4427 }
4428
4429 if (h->size == 0)
4430 {
4431 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4432 h->root.root.string);
4433 return TRUE;
4434 }
4435
4436 /* We must allocate the symbol in our .dynbss section, which will
4437 become part of the .bss section of the executable. There will be
4438 an entry for this symbol in the .dynsym section. The dynamic
4439 object will contain position independent code, so all references
4440 from the dynamic object to this symbol will go through the global
4441 offset table. The dynamic linker will use the .dynsym entry to
4442 determine the address it must put in the global offset table, so
4443 both the dynamic object and the regular object will refer to the
4444 same memory location for the variable.
4445
4446 Of course, if the symbol is referenced using SDAREL relocs, we
4447 must instead allocate it in .sbss. */
4448
4449 if (ppc_elf_hash_entry (h)->has_sda_refs)
4450 s = htab->dynsbss;
4451 else
4452 s = htab->dynbss;
4453 BFD_ASSERT (s != NULL);
4454
4455 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4456 copy the initial value out of the dynamic object and into the
4457 runtime process image. We need to remember the offset into the
4458 .rela.bss section we are going to use. */
4459 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4460 {
4461 asection *srel;
4462
4463 if (ppc_elf_hash_entry (h)->has_sda_refs)
4464 srel = htab->relsbss;
4465 else
4466 srel = htab->relbss;
4467 BFD_ASSERT (srel != NULL);
4468 srel->size += sizeof (Elf32_External_Rela);
4469 h->needs_copy = 1;
4470 }
4471
4472 return _bfd_elf_adjust_dynamic_copy (h, s);
4473 }
4474 \f
4475 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4476 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4477 specifying the addend on the plt relocation. For -fpic code, the sym
4478 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4479 xxxxxxxx.got2.plt_pic32.<callee>. */
4480
4481 static bfd_boolean
4482 add_stub_sym (struct plt_entry *ent,
4483 struct elf_link_hash_entry *h,
4484 struct bfd_link_info *info)
4485 {
4486 struct elf_link_hash_entry *sh;
4487 size_t len1, len2, len3;
4488 char *name;
4489 const char *stub;
4490 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4491
4492 if (info->shared || info->pie)
4493 stub = ".plt_pic32.";
4494 else
4495 stub = ".plt_call32.";
4496
4497 len1 = strlen (h->root.root.string);
4498 len2 = strlen (stub);
4499 len3 = 0;
4500 if (ent->sec)
4501 len3 = strlen (ent->sec->name);
4502 name = bfd_malloc (len1 + len2 + len3 + 9);
4503 if (name == NULL)
4504 return FALSE;
4505 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4506 if (ent->sec)
4507 memcpy (name + 8, ent->sec->name, len3);
4508 memcpy (name + 8 + len3, stub, len2);
4509 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4510 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4511 if (sh == NULL)
4512 return FALSE;
4513 if (sh->root.type == bfd_link_hash_new)
4514 {
4515 sh->root.type = bfd_link_hash_defined;
4516 sh->root.u.def.section = htab->glink;
4517 sh->root.u.def.value = ent->glink_offset;
4518 sh->ref_regular = 1;
4519 sh->def_regular = 1;
4520 sh->ref_regular_nonweak = 1;
4521 sh->forced_local = 1;
4522 sh->non_elf = 0;
4523 }
4524 return TRUE;
4525 }
4526
4527 /* Allocate NEED contiguous space in .got, and return the offset.
4528 Handles allocation of the got header when crossing 32k. */
4529
4530 static bfd_vma
4531 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4532 {
4533 bfd_vma where;
4534 unsigned int max_before_header;
4535
4536 if (htab->plt_type == PLT_VXWORKS)
4537 {
4538 where = htab->got->size;
4539 htab->got->size += need;
4540 }
4541 else
4542 {
4543 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4544 if (need <= htab->got_gap)
4545 {
4546 where = max_before_header - htab->got_gap;
4547 htab->got_gap -= need;
4548 }
4549 else
4550 {
4551 if (htab->got->size + need > max_before_header
4552 && htab->got->size <= max_before_header)
4553 {
4554 htab->got_gap = max_before_header - htab->got->size;
4555 htab->got->size = max_before_header + htab->got_header_size;
4556 }
4557 where = htab->got->size;
4558 htab->got->size += need;
4559 }
4560 }
4561 return where;
4562 }
4563
4564 /* Allocate space in associated reloc sections for dynamic relocs. */
4565
4566 static bfd_boolean
4567 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4568 {
4569 struct bfd_link_info *info = inf;
4570 struct ppc_elf_link_hash_entry *eh;
4571 struct ppc_elf_link_hash_table *htab;
4572 struct ppc_elf_dyn_relocs *p;
4573
4574 if (h->root.type == bfd_link_hash_indirect)
4575 return TRUE;
4576
4577 if (h->root.type == bfd_link_hash_warning)
4578 /* When warning symbols are created, they **replace** the "real"
4579 entry in the hash table, thus we never get to see the real
4580 symbol in a hash traversal. So look at it now. */
4581 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4582
4583 htab = ppc_elf_hash_table (info);
4584 if (htab->elf.dynamic_sections_created)
4585 {
4586 struct plt_entry *ent;
4587 bfd_boolean doneone = FALSE;
4588 bfd_vma plt_offset = 0, glink_offset = 0;
4589
4590 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4591 if (ent->plt.refcount > 0)
4592 {
4593 /* Make sure this symbol is output as a dynamic symbol. */
4594 if (h->dynindx == -1
4595 && !h->forced_local)
4596 {
4597 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4598 return FALSE;
4599 }
4600
4601 if (info->shared
4602 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4603 {
4604 asection *s = htab->plt;
4605
4606 if (htab->plt_type == PLT_NEW)
4607 {
4608 if (!doneone)
4609 {
4610 plt_offset = s->size;
4611 s->size += 4;
4612 }
4613 ent->plt.offset = plt_offset;
4614
4615 s = htab->glink;
4616 if (!doneone || info->shared || info->pie)
4617 {
4618 glink_offset = s->size;
4619 s->size += GLINK_ENTRY_SIZE;
4620 }
4621 if (!doneone
4622 && !info->shared
4623 && h->def_dynamic
4624 && !h->def_regular)
4625 {
4626 h->root.u.def.section = s;
4627 h->root.u.def.value = glink_offset;
4628 }
4629 ent->glink_offset = glink_offset;
4630
4631 if (htab->emit_stub_syms
4632 && !add_stub_sym (ent, h, info))
4633 return FALSE;
4634 }
4635 else
4636 {
4637 if (!doneone)
4638 {
4639 /* If this is the first .plt entry, make room
4640 for the special first entry. */
4641 if (s->size == 0)
4642 s->size += htab->plt_initial_entry_size;
4643
4644 /* The PowerPC PLT is actually composed of two
4645 parts, the first part is 2 words (for a load
4646 and a jump), and then there is a remaining
4647 word available at the end. */
4648 plt_offset = (htab->plt_initial_entry_size
4649 + (htab->plt_slot_size
4650 * ((s->size
4651 - htab->plt_initial_entry_size)
4652 / htab->plt_entry_size)));
4653
4654 /* If this symbol is not defined in a regular
4655 file, and we are not generating a shared
4656 library, then set the symbol to this location
4657 in the .plt. This is required to make
4658 function pointers compare as equal between
4659 the normal executable and the shared library. */
4660 if (! info->shared
4661 && h->def_dynamic
4662 && !h->def_regular)
4663 {
4664 h->root.u.def.section = s;
4665 h->root.u.def.value = plt_offset;
4666 }
4667
4668 /* Make room for this entry. */
4669 s->size += htab->plt_entry_size;
4670 /* After the 8192nd entry, room for two entries
4671 is allocated. */
4672 if (htab->plt_type == PLT_OLD
4673 && (s->size - htab->plt_initial_entry_size)
4674 / htab->plt_entry_size
4675 > PLT_NUM_SINGLE_ENTRIES)
4676 s->size += htab->plt_entry_size;
4677 }
4678 ent->plt.offset = plt_offset;
4679 }
4680
4681 /* We also need to make an entry in the .rela.plt section. */
4682 if (!doneone)
4683 {
4684 htab->relplt->size += sizeof (Elf32_External_Rela);
4685
4686 if (htab->plt_type == PLT_VXWORKS)
4687 {
4688 /* Allocate space for the unloaded relocations. */
4689 if (!info->shared)
4690 {
4691 if (ent->plt.offset
4692 == (bfd_vma) htab->plt_initial_entry_size)
4693 {
4694 htab->srelplt2->size
4695 += sizeof (Elf32_External_Rela)
4696 * VXWORKS_PLTRESOLVE_RELOCS;
4697 }
4698
4699 htab->srelplt2->size
4700 += sizeof (Elf32_External_Rela)
4701 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4702 }
4703
4704 /* Every PLT entry has an associated GOT entry in
4705 .got.plt. */
4706 htab->sgotplt->size += 4;
4707 }
4708 doneone = TRUE;
4709 }
4710 }
4711 else
4712 ent->plt.offset = (bfd_vma) -1;
4713 }
4714 else
4715 ent->plt.offset = (bfd_vma) -1;
4716
4717 if (!doneone)
4718 {
4719 h->plt.plist = NULL;
4720 h->needs_plt = 0;
4721 }
4722 }
4723 else
4724 {
4725 h->plt.plist = NULL;
4726 h->needs_plt = 0;
4727 }
4728
4729 eh = (struct ppc_elf_link_hash_entry *) h;
4730 if (eh->elf.got.refcount > 0)
4731 {
4732 /* Make sure this symbol is output as a dynamic symbol. */
4733 if (eh->elf.dynindx == -1
4734 && !eh->elf.forced_local)
4735 {
4736 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4737 return FALSE;
4738 }
4739
4740 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4741 && !eh->elf.def_dynamic)
4742 {
4743 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4744 htab->tlsld_got.refcount += 1;
4745 eh->elf.got.offset = (bfd_vma) -1;
4746 }
4747 else
4748 {
4749 bfd_boolean dyn;
4750 unsigned int need = 0;
4751 if ((eh->tls_mask & TLS_TLS) != 0)
4752 {
4753 if ((eh->tls_mask & TLS_LD) != 0)
4754 need += 8;
4755 if ((eh->tls_mask & TLS_GD) != 0)
4756 need += 8;
4757 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4758 need += 4;
4759 if ((eh->tls_mask & TLS_DTPREL) != 0)
4760 need += 4;
4761 }
4762 else
4763 need += 4;
4764 eh->elf.got.offset = allocate_got (htab, need);
4765 dyn = htab->elf.dynamic_sections_created;
4766 if ((info->shared
4767 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4768 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4769 || eh->elf.root.type != bfd_link_hash_undefweak))
4770 {
4771 /* All the entries we allocated need relocs.
4772 Except LD only needs one. */
4773 if ((eh->tls_mask & TLS_LD) != 0)
4774 need -= 4;
4775 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4776 }
4777 }
4778 }
4779 else
4780 eh->elf.got.offset = (bfd_vma) -1;
4781
4782 if (eh->dyn_relocs == NULL)
4783 return TRUE;
4784
4785 /* In the shared -Bsymbolic case, discard space allocated for
4786 dynamic pc-relative relocs against symbols which turn out to be
4787 defined in regular objects. For the normal shared case, discard
4788 space for relocs that have become local due to symbol visibility
4789 changes. */
4790
4791 if (info->shared)
4792 {
4793 /* Relocs that use pc_count are those that appear on a call insn,
4794 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4795 generated via assembly. We want calls to protected symbols to
4796 resolve directly to the function rather than going via the plt.
4797 If people want function pointer comparisons to work as expected
4798 then they should avoid writing weird assembly. */
4799 if (SYMBOL_CALLS_LOCAL (info, h))
4800 {
4801 struct ppc_elf_dyn_relocs **pp;
4802
4803 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4804 {
4805 p->count -= p->pc_count;
4806 p->pc_count = 0;
4807 if (p->count == 0)
4808 *pp = p->next;
4809 else
4810 pp = &p->next;
4811 }
4812 }
4813
4814 /* Discard relocs on undefined symbols that must be local. */
4815 if (eh->dyn_relocs != NULL
4816 && h->root.type == bfd_link_hash_undefined
4817 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
4818 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
4819 eh->dyn_relocs = NULL;
4820
4821 /* Also discard relocs on undefined weak syms with non-default
4822 visibility. */
4823 if (eh->dyn_relocs != NULL
4824 && h->root.type == bfd_link_hash_undefweak)
4825 {
4826 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4827 eh->dyn_relocs = NULL;
4828
4829 /* Make sure undefined weak symbols are output as a dynamic
4830 symbol in PIEs. */
4831 else if (h->dynindx == -1
4832 && !h->forced_local)
4833 {
4834 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4835 return FALSE;
4836 }
4837 }
4838 }
4839 else if (ELIMINATE_COPY_RELOCS)
4840 {
4841 /* For the non-shared case, discard space for relocs against
4842 symbols which turn out to need copy relocs or are not
4843 dynamic. */
4844
4845 if (!h->non_got_ref
4846 && !h->def_regular)
4847 {
4848 /* Make sure this symbol is output as a dynamic symbol.
4849 Undefined weak syms won't yet be marked as dynamic. */
4850 if (h->dynindx == -1
4851 && !h->forced_local)
4852 {
4853 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4854 return FALSE;
4855 }
4856
4857 /* If that succeeded, we know we'll be keeping all the
4858 relocs. */
4859 if (h->dynindx != -1)
4860 goto keep;
4861 }
4862
4863 eh->dyn_relocs = NULL;
4864
4865 keep: ;
4866 }
4867
4868 /* Finally, allocate space. */
4869 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4870 {
4871 asection *sreloc = elf_section_data (p->sec)->sreloc;
4872 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4873 }
4874
4875 return TRUE;
4876 }
4877
4878 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
4879 read-only sections. */
4880
4881 static bfd_boolean
4882 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
4883 {
4884 if (h->root.type == bfd_link_hash_indirect)
4885 return TRUE;
4886
4887 if (h->root.type == bfd_link_hash_warning)
4888 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4889
4890 if (readonly_dynrelocs (h))
4891 {
4892 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4893
4894 /* Not an error, just cut short the traversal. */
4895 return FALSE;
4896 }
4897 return TRUE;
4898 }
4899
4900 /* Set the sizes of the dynamic sections. */
4901
4902 static bfd_boolean
4903 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4904 struct bfd_link_info *info)
4905 {
4906 struct ppc_elf_link_hash_table *htab;
4907 asection *s;
4908 bfd_boolean relocs;
4909 bfd *ibfd;
4910
4911 #ifdef DEBUG
4912 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4913 #endif
4914
4915 htab = ppc_elf_hash_table (info);
4916 BFD_ASSERT (htab->elf.dynobj != NULL);
4917
4918 if (elf_hash_table (info)->dynamic_sections_created)
4919 {
4920 /* Set the contents of the .interp section to the interpreter. */
4921 if (info->executable)
4922 {
4923 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4924 BFD_ASSERT (s != NULL);
4925 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4926 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4927 }
4928 }
4929
4930 if (htab->plt_type == PLT_OLD)
4931 htab->got_header_size = 16;
4932 else if (htab->plt_type == PLT_NEW)
4933 htab->got_header_size = 12;
4934
4935 /* Set up .got offsets for local syms, and space for local dynamic
4936 relocs. */
4937 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4938 {
4939 bfd_signed_vma *local_got;
4940 bfd_signed_vma *end_local_got;
4941 char *lgot_masks;
4942 bfd_size_type locsymcount;
4943 Elf_Internal_Shdr *symtab_hdr;
4944
4945 if (!is_ppc_elf (ibfd))
4946 continue;
4947
4948 for (s = ibfd->sections; s != NULL; s = s->next)
4949 {
4950 struct ppc_elf_dyn_relocs *p;
4951
4952 for (p = ((struct ppc_elf_dyn_relocs *)
4953 elf_section_data (s)->local_dynrel);
4954 p != NULL;
4955 p = p->next)
4956 {
4957 if (!bfd_is_abs_section (p->sec)
4958 && bfd_is_abs_section (p->sec->output_section))
4959 {
4960 /* Input section has been discarded, either because
4961 it is a copy of a linkonce section or due to
4962 linker script /DISCARD/, so we'll be discarding
4963 the relocs too. */
4964 }
4965 else if (p->count != 0)
4966 {
4967 elf_section_data (p->sec)->sreloc->size
4968 += p->count * sizeof (Elf32_External_Rela);
4969 if ((p->sec->output_section->flags
4970 & (SEC_READONLY | SEC_ALLOC))
4971 == (SEC_READONLY | SEC_ALLOC))
4972 info->flags |= DF_TEXTREL;
4973 }
4974 }
4975 }
4976
4977 local_got = elf_local_got_refcounts (ibfd);
4978 if (!local_got)
4979 continue;
4980
4981 symtab_hdr = &elf_symtab_hdr (ibfd);
4982 locsymcount = symtab_hdr->sh_info;
4983 end_local_got = local_got + locsymcount;
4984 lgot_masks = (char *) end_local_got;
4985 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4986 if (*local_got > 0)
4987 {
4988 if (*lgot_masks == (TLS_TLS | TLS_LD))
4989 {
4990 /* If just an LD reloc, we'll just use
4991 htab->tlsld_got.offset. */
4992 htab->tlsld_got.refcount += 1;
4993 *local_got = (bfd_vma) -1;
4994 }
4995 else
4996 {
4997 unsigned int need = 0;
4998 if ((*lgot_masks & TLS_TLS) != 0)
4999 {
5000 if ((*lgot_masks & TLS_GD) != 0)
5001 need += 8;
5002 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5003 need += 4;
5004 if ((*lgot_masks & TLS_DTPREL) != 0)
5005 need += 4;
5006 }
5007 else
5008 need += 4;
5009 *local_got = allocate_got (htab, need);
5010 if (info->shared)
5011 htab->relgot->size += (need
5012 * (sizeof (Elf32_External_Rela) / 4));
5013 }
5014 }
5015 else
5016 *local_got = (bfd_vma) -1;
5017 }
5018
5019 /* Allocate space for global sym dynamic relocs. */
5020 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5021
5022 if (htab->tlsld_got.refcount > 0)
5023 {
5024 htab->tlsld_got.offset = allocate_got (htab, 8);
5025 if (info->shared)
5026 htab->relgot->size += sizeof (Elf32_External_Rela);
5027 }
5028 else
5029 htab->tlsld_got.offset = (bfd_vma) -1;
5030
5031 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5032 {
5033 unsigned int g_o_t = 32768;
5034
5035 /* If we haven't allocated the header, do so now. When we get here,
5036 for old plt/got the got size will be 0 to 32764 (not allocated),
5037 or 32780 to 65536 (header allocated). For new plt/got, the
5038 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5039 if (htab->got->size <= 32768)
5040 {
5041 g_o_t = htab->got->size;
5042 if (htab->plt_type == PLT_OLD)
5043 g_o_t += 4;
5044 htab->got->size += htab->got_header_size;
5045 }
5046
5047 htab->elf.hgot->root.u.def.value = g_o_t;
5048 }
5049
5050 if (htab->glink != NULL && htab->glink->size != 0)
5051 {
5052 htab->glink_pltresolve = htab->glink->size;
5053 /* Space for the branch table. */
5054 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5055 /* Pad out to align the start of PLTresolve. */
5056 htab->glink->size += -htab->glink->size & 15;
5057 htab->glink->size += GLINK_PLTRESOLVE;
5058
5059 if (htab->emit_stub_syms)
5060 {
5061 struct elf_link_hash_entry *sh;
5062 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5063 TRUE, FALSE, FALSE);
5064 if (sh == NULL)
5065 return FALSE;
5066 if (sh->root.type == bfd_link_hash_new)
5067 {
5068 sh->root.type = bfd_link_hash_defined;
5069 sh->root.u.def.section = htab->glink;
5070 sh->root.u.def.value = htab->glink_pltresolve;
5071 sh->ref_regular = 1;
5072 sh->def_regular = 1;
5073 sh->ref_regular_nonweak = 1;
5074 sh->forced_local = 1;
5075 sh->non_elf = 0;
5076 }
5077 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5078 TRUE, FALSE, FALSE);
5079 if (sh == NULL)
5080 return FALSE;
5081 if (sh->root.type == bfd_link_hash_new)
5082 {
5083 sh->root.type = bfd_link_hash_defined;
5084 sh->root.u.def.section = htab->glink;
5085 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5086 sh->ref_regular = 1;
5087 sh->def_regular = 1;
5088 sh->ref_regular_nonweak = 1;
5089 sh->forced_local = 1;
5090 sh->non_elf = 0;
5091 }
5092 }
5093 }
5094
5095 /* We've now determined the sizes of the various dynamic sections.
5096 Allocate memory for them. */
5097 relocs = FALSE;
5098 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5099 {
5100 bfd_boolean strip_section = TRUE;
5101
5102 if ((s->flags & SEC_LINKER_CREATED) == 0)
5103 continue;
5104
5105 if (s == htab->plt
5106 || s == htab->glink
5107 || s == htab->got
5108 || s == htab->sgotplt
5109 || s == htab->sbss
5110 || s == htab->dynbss
5111 || s == htab->dynsbss)
5112 {
5113 /* We'd like to strip these sections if they aren't needed, but if
5114 we've exported dynamic symbols from them we must leave them.
5115 It's too late to tell BFD to get rid of the symbols. */
5116 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5117 strip_section = FALSE;
5118 /* Strip this section if we don't need it; see the
5119 comment below. */
5120 }
5121 else if (s == htab->sdata[0].section
5122 || s == htab->sdata[1].section)
5123 {
5124 /* Strip these too. */
5125 }
5126 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5127 {
5128 if (s->size != 0)
5129 {
5130 /* Remember whether there are any relocation sections. */
5131 relocs = TRUE;
5132
5133 /* We use the reloc_count field as a counter if we need
5134 to copy relocs into the output file. */
5135 s->reloc_count = 0;
5136 }
5137 }
5138 else
5139 {
5140 /* It's not one of our sections, so don't allocate space. */
5141 continue;
5142 }
5143
5144 if (s->size == 0 && strip_section)
5145 {
5146 /* If we don't need this section, strip it from the
5147 output file. This is mostly to handle .rela.bss and
5148 .rela.plt. We must create both sections in
5149 create_dynamic_sections, because they must be created
5150 before the linker maps input sections to output
5151 sections. The linker does that before
5152 adjust_dynamic_symbol is called, and it is that
5153 function which decides whether anything needs to go
5154 into these sections. */
5155 s->flags |= SEC_EXCLUDE;
5156 continue;
5157 }
5158
5159 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5160 continue;
5161
5162 /* Allocate memory for the section contents. */
5163 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5164 if (s->contents == NULL)
5165 return FALSE;
5166 }
5167
5168 if (htab->elf.dynamic_sections_created)
5169 {
5170 /* Add some entries to the .dynamic section. We fill in the
5171 values later, in ppc_elf_finish_dynamic_sections, but we
5172 must add the entries now so that we get the correct size for
5173 the .dynamic section. The DT_DEBUG entry is filled in by the
5174 dynamic linker and used by the debugger. */
5175 #define add_dynamic_entry(TAG, VAL) \
5176 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5177
5178 if (info->executable)
5179 {
5180 if (!add_dynamic_entry (DT_DEBUG, 0))
5181 return FALSE;
5182 }
5183
5184 if (htab->plt != NULL && htab->plt->size != 0)
5185 {
5186 if (!add_dynamic_entry (DT_PLTGOT, 0)
5187 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5188 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5189 || !add_dynamic_entry (DT_JMPREL, 0))
5190 return FALSE;
5191 }
5192
5193 if (htab->glink != NULL && htab->glink->size != 0)
5194 {
5195 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5196 return FALSE;
5197 }
5198
5199 if (relocs)
5200 {
5201 if (!add_dynamic_entry (DT_RELA, 0)
5202 || !add_dynamic_entry (DT_RELASZ, 0)
5203 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5204 return FALSE;
5205 }
5206
5207 /* If any dynamic relocs apply to a read-only section, then we
5208 need a DT_TEXTREL entry. */
5209 if ((info->flags & DF_TEXTREL) == 0)
5210 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5211 info);
5212
5213 if ((info->flags & DF_TEXTREL) != 0)
5214 {
5215 if (!add_dynamic_entry (DT_TEXTREL, 0))
5216 return FALSE;
5217 }
5218 if (htab->is_vxworks
5219 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5220 return FALSE;
5221 }
5222 #undef add_dynamic_entry
5223
5224 return TRUE;
5225 }
5226
5227 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5228
5229 static bfd_boolean
5230 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5231 {
5232 if (h->plt.plist != NULL
5233 && !h->def_regular
5234 && (!h->pointer_equality_needed
5235 || !h->ref_regular_nonweak))
5236 return FALSE;
5237
5238 return _bfd_elf_hash_symbol (h);
5239 }
5240 \f
5241 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5242
5243 static const int shared_stub_entry[] =
5244 {
5245 0x7c0802a6, /* mflr 0 */
5246 0x429f0005, /* bcl 20, 31, .Lxxx */
5247 0x7d6802a6, /* mflr 11 */
5248 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5249 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5250 0x7c0803a6, /* mtlr 0 */
5251 0x7d6903a6, /* mtctr 11 */
5252 0x4e800420, /* bctr */
5253 };
5254
5255 static const int stub_entry[] =
5256 {
5257 0x3d600000, /* lis 11,xxx@ha */
5258 0x396b0000, /* addi 11,11,xxx@l */
5259 0x7d6903a6, /* mtctr 11 */
5260 0x4e800420, /* bctr */
5261 };
5262
5263 static bfd_boolean
5264 ppc_elf_relax_section (bfd *abfd,
5265 asection *isec,
5266 struct bfd_link_info *link_info,
5267 bfd_boolean *again)
5268 {
5269 struct one_fixup
5270 {
5271 struct one_fixup *next;
5272 asection *tsec;
5273 bfd_vma toff;
5274 bfd_vma trampoff;
5275 };
5276
5277 Elf_Internal_Shdr *symtab_hdr;
5278 bfd_byte *contents = NULL;
5279 Elf_Internal_Sym *isymbuf = NULL;
5280 Elf_Internal_Rela *internal_relocs = NULL;
5281 Elf_Internal_Rela *irel, *irelend;
5282 struct one_fixup *fixups = NULL;
5283 bfd_boolean changed;
5284 struct ppc_elf_link_hash_table *htab;
5285 bfd_size_type trampoff;
5286 asection *got2;
5287
5288 *again = FALSE;
5289
5290 /* Nothing to do if there are no relocations, and no need to do
5291 anything with non-alloc sections. */
5292 if ((isec->flags & SEC_ALLOC) == 0
5293 || (isec->flags & SEC_RELOC) == 0
5294 || isec->reloc_count == 0)
5295 return TRUE;
5296
5297 trampoff = (isec->size + 3) & (bfd_vma) -4;
5298 /* Space for a branch around any trampolines. */
5299 trampoff += 4;
5300
5301 symtab_hdr = &elf_symtab_hdr (abfd);
5302
5303 /* Get a copy of the native relocations. */
5304 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5305 link_info->keep_memory);
5306 if (internal_relocs == NULL)
5307 goto error_return;
5308
5309 htab = ppc_elf_hash_table (link_info);
5310 got2 = bfd_get_section_by_name (abfd, ".got2");
5311
5312 irelend = internal_relocs + isec->reloc_count;
5313 for (irel = internal_relocs; irel < irelend; irel++)
5314 {
5315 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5316 bfd_vma symaddr, reladdr, toff, roff;
5317 asection *tsec;
5318 struct one_fixup *f;
5319 size_t insn_offset = 0;
5320 bfd_vma max_branch_offset, val;
5321 bfd_byte *hit_addr;
5322 unsigned long t0;
5323 unsigned char sym_type;
5324
5325 switch (r_type)
5326 {
5327 case R_PPC_REL24:
5328 case R_PPC_LOCAL24PC:
5329 case R_PPC_PLTREL24:
5330 max_branch_offset = 1 << 25;
5331 break;
5332
5333 case R_PPC_REL14:
5334 case R_PPC_REL14_BRTAKEN:
5335 case R_PPC_REL14_BRNTAKEN:
5336 max_branch_offset = 1 << 15;
5337 break;
5338
5339 default:
5340 continue;
5341 }
5342
5343 /* Get the value of the symbol referred to by the reloc. */
5344 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5345 {
5346 /* A local symbol. */
5347 Elf_Internal_Sym *isym;
5348
5349 /* Read this BFD's local symbols. */
5350 if (isymbuf == NULL)
5351 {
5352 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5353 if (isymbuf == NULL)
5354 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5355 symtab_hdr->sh_info, 0,
5356 NULL, NULL, NULL);
5357 if (isymbuf == 0)
5358 goto error_return;
5359 }
5360 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5361 if (isym->st_shndx == SHN_UNDEF)
5362 continue; /* We can't do anything with undefined symbols. */
5363 else if (isym->st_shndx == SHN_ABS)
5364 tsec = bfd_abs_section_ptr;
5365 else if (isym->st_shndx == SHN_COMMON)
5366 tsec = bfd_com_section_ptr;
5367 else
5368 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5369
5370 toff = isym->st_value;
5371 sym_type = ELF_ST_TYPE (isym->st_info);
5372 }
5373 else
5374 {
5375 /* Global symbol handling. */
5376 unsigned long indx;
5377 struct elf_link_hash_entry *h;
5378
5379 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5380 h = elf_sym_hashes (abfd)[indx];
5381
5382 while (h->root.type == bfd_link_hash_indirect
5383 || h->root.type == bfd_link_hash_warning)
5384 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5385
5386 tsec = NULL;
5387 toff = 0;
5388 if (r_type == R_PPC_PLTREL24
5389 && htab->plt != NULL)
5390 {
5391 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5392
5393 if (ent != NULL)
5394 {
5395 if (htab->plt_type == PLT_NEW)
5396 {
5397 tsec = htab->glink;
5398 toff = ent->glink_offset;
5399 }
5400 else
5401 {
5402 tsec = htab->plt;
5403 toff = ent->plt.offset;
5404 }
5405 }
5406 }
5407 if (tsec != NULL)
5408 ;
5409 else if (h->root.type == bfd_link_hash_defined
5410 || h->root.type == bfd_link_hash_defweak)
5411 {
5412 tsec = h->root.u.def.section;
5413 toff = h->root.u.def.value;
5414 }
5415 else
5416 continue;
5417
5418 sym_type = h->type;
5419 }
5420
5421 /* If the branch and target are in the same section, you have
5422 no hope of adding stubs. We'll error out later should the
5423 branch overflow. */
5424 if (tsec == isec)
5425 continue;
5426
5427 /* There probably isn't any reason to handle symbols in
5428 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5429 attribute for a code section, and we are only looking at
5430 branches. However, implement it correctly here as a
5431 reference for other target relax_section functions. */
5432 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5433 {
5434 /* At this stage in linking, no SEC_MERGE symbol has been
5435 adjusted, so all references to such symbols need to be
5436 passed through _bfd_merged_section_offset. (Later, in
5437 relocate_section, all SEC_MERGE symbols *except* for
5438 section symbols have been adjusted.)
5439
5440 gas may reduce relocations against symbols in SEC_MERGE
5441 sections to a relocation against the section symbol when
5442 the original addend was zero. When the reloc is against
5443 a section symbol we should include the addend in the
5444 offset passed to _bfd_merged_section_offset, since the
5445 location of interest is the original symbol. On the
5446 other hand, an access to "sym+addend" where "sym" is not
5447 a section symbol should not include the addend; Such an
5448 access is presumed to be an offset from "sym"; The
5449 location of interest is just "sym". */
5450 if (sym_type == STT_SECTION)
5451 toff += irel->r_addend;
5452
5453 toff = _bfd_merged_section_offset (abfd, &tsec,
5454 elf_section_data (tsec)->sec_info,
5455 toff);
5456
5457 if (sym_type != STT_SECTION)
5458 toff += irel->r_addend;
5459 }
5460 /* PLTREL24 addends are special. */
5461 else if (r_type != R_PPC_PLTREL24)
5462 toff += irel->r_addend;
5463
5464 /* Attempted -shared link of non-pic code loses. */
5465 if (tsec->output_section == NULL)
5466 continue;
5467
5468 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5469
5470 roff = irel->r_offset;
5471 reladdr = isec->output_section->vma + isec->output_offset + roff;
5472
5473 /* If the branch is in range, no need to do anything. */
5474 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5475 continue;
5476
5477 /* Look for an existing fixup to this address. */
5478 for (f = fixups; f ; f = f->next)
5479 if (f->tsec == tsec && f->toff == toff)
5480 break;
5481
5482 if (f == NULL)
5483 {
5484 size_t size;
5485 unsigned long stub_rtype;
5486
5487 val = trampoff - roff;
5488 if (val >= max_branch_offset)
5489 /* Oh dear, we can't reach a trampoline. Don't try to add
5490 one. We'll report an error later. */
5491 continue;
5492
5493 if (link_info->shared)
5494 {
5495 size = 4 * ARRAY_SIZE (shared_stub_entry);
5496 insn_offset = 12;
5497 stub_rtype = R_PPC_RELAX32PC;
5498 }
5499 else
5500 {
5501 size = 4 * ARRAY_SIZE (stub_entry);
5502 insn_offset = 0;
5503 stub_rtype = R_PPC_RELAX32;
5504 }
5505
5506 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5507 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5508 abort ();
5509 if (tsec == htab->plt
5510 || tsec == htab->glink)
5511 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5512
5513 /* Hijack the old relocation. Since we need two
5514 relocations for this use a "composite" reloc. */
5515 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5516 stub_rtype);
5517 irel->r_offset = trampoff + insn_offset;
5518
5519 /* Record the fixup so we don't do it again this section. */
5520 f = bfd_malloc (sizeof (*f));
5521 f->next = fixups;
5522 f->tsec = tsec;
5523 f->toff = toff;
5524 f->trampoff = trampoff;
5525 fixups = f;
5526
5527 trampoff += size;
5528 }
5529 else
5530 {
5531 val = f->trampoff - roff;
5532 if (val >= max_branch_offset)
5533 continue;
5534
5535 /* Nop out the reloc, since we're finalizing things here. */
5536 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5537 }
5538
5539 /* Get the section contents. */
5540 if (contents == NULL)
5541 {
5542 /* Get cached copy if it exists. */
5543 if (elf_section_data (isec)->this_hdr.contents != NULL)
5544 contents = elf_section_data (isec)->this_hdr.contents;
5545 else
5546 {
5547 /* Go get them off disk. */
5548 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5549 goto error_return;
5550 }
5551 }
5552
5553 /* Fix up the existing branch to hit the trampoline. */
5554 hit_addr = contents + roff;
5555 switch (r_type)
5556 {
5557 case R_PPC_REL24:
5558 case R_PPC_LOCAL24PC:
5559 case R_PPC_PLTREL24:
5560 t0 = bfd_get_32 (abfd, hit_addr);
5561 t0 &= ~0x3fffffc;
5562 t0 |= val & 0x3fffffc;
5563 bfd_put_32 (abfd, t0, hit_addr);
5564 break;
5565
5566 case R_PPC_REL14:
5567 case R_PPC_REL14_BRTAKEN:
5568 case R_PPC_REL14_BRNTAKEN:
5569 t0 = bfd_get_32 (abfd, hit_addr);
5570 t0 &= ~0xfffc;
5571 t0 |= val & 0xfffc;
5572 bfd_put_32 (abfd, t0, hit_addr);
5573 break;
5574 }
5575 }
5576
5577 /* Write out the trampolines. */
5578 changed = fixups != NULL;
5579 if (fixups != NULL)
5580 {
5581 const int *stub;
5582 bfd_byte *dest;
5583 bfd_vma val;
5584 int i, size;
5585
5586 do
5587 {
5588 struct one_fixup *f = fixups;
5589 fixups = fixups->next;
5590 free (f);
5591 }
5592 while (fixups);
5593
5594 contents = bfd_realloc_or_free (contents, trampoff);
5595 if (contents == NULL)
5596 goto error_return;
5597
5598 isec->size = (isec->size + 3) & (bfd_vma) -4;
5599 /* Branch around the trampolines. */
5600 val = trampoff - isec->size + 0x48000000;
5601 dest = contents + isec->size;
5602 isec->size = trampoff;
5603 bfd_put_32 (abfd, val, dest);
5604 dest += 4;
5605
5606 if (link_info->shared)
5607 {
5608 stub = shared_stub_entry;
5609 size = ARRAY_SIZE (shared_stub_entry);
5610 }
5611 else
5612 {
5613 stub = stub_entry;
5614 size = ARRAY_SIZE (stub_entry);
5615 }
5616
5617 i = 0;
5618 while (dest < contents + trampoff)
5619 {
5620 bfd_put_32 (abfd, stub[i], dest);
5621 i++;
5622 if (i == size)
5623 i = 0;
5624 dest += 4;
5625 }
5626 BFD_ASSERT (i == 0);
5627 }
5628
5629 if (isymbuf != NULL
5630 && symtab_hdr->contents != (unsigned char *) isymbuf)
5631 {
5632 if (! link_info->keep_memory)
5633 free (isymbuf);
5634 else
5635 {
5636 /* Cache the symbols for elf_link_input_bfd. */
5637 symtab_hdr->contents = (unsigned char *) isymbuf;
5638 }
5639 }
5640
5641 if (contents != NULL
5642 && elf_section_data (isec)->this_hdr.contents != contents)
5643 {
5644 if (!changed && !link_info->keep_memory)
5645 free (contents);
5646 else
5647 {
5648 /* Cache the section contents for elf_link_input_bfd. */
5649 elf_section_data (isec)->this_hdr.contents = contents;
5650 }
5651 }
5652
5653 if (elf_section_data (isec)->relocs != internal_relocs)
5654 {
5655 if (!changed)
5656 free (internal_relocs);
5657 else
5658 elf_section_data (isec)->relocs = internal_relocs;
5659 }
5660
5661 *again = changed;
5662 return TRUE;
5663
5664 error_return:
5665 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5666 free (isymbuf);
5667 if (contents != NULL
5668 && elf_section_data (isec)->this_hdr.contents != contents)
5669 free (contents);
5670 if (internal_relocs != NULL
5671 && elf_section_data (isec)->relocs != internal_relocs)
5672 free (internal_relocs);
5673 return FALSE;
5674 }
5675 \f
5676 /* What to do when ld finds relocations against symbols defined in
5677 discarded sections. */
5678
5679 static unsigned int
5680 ppc_elf_action_discarded (asection *sec)
5681 {
5682 if (strcmp (".fixup", sec->name) == 0)
5683 return 0;
5684
5685 if (strcmp (".got2", sec->name) == 0)
5686 return 0;
5687
5688 return _bfd_elf_default_action_discarded (sec);
5689 }
5690 \f
5691 /* Fill in the address for a pointer generated in a linker section. */
5692
5693 static bfd_vma
5694 elf_finish_pointer_linker_section (bfd *input_bfd,
5695 elf_linker_section_t *lsect,
5696 struct elf_link_hash_entry *h,
5697 bfd_vma relocation,
5698 const Elf_Internal_Rela *rel)
5699 {
5700 elf_linker_section_pointers_t *linker_section_ptr;
5701
5702 BFD_ASSERT (lsect != NULL);
5703
5704 if (h != NULL)
5705 {
5706 /* Handle global symbol. */
5707 struct ppc_elf_link_hash_entry *eh;
5708
5709 eh = (struct ppc_elf_link_hash_entry *) h;
5710 BFD_ASSERT (eh->elf.def_regular);
5711 linker_section_ptr = eh->linker_section_pointer;
5712 }
5713 else
5714 {
5715 /* Handle local symbol. */
5716 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5717
5718 BFD_ASSERT (is_ppc_elf (input_bfd));
5719 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5720 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5721 }
5722
5723 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5724 rel->r_addend,
5725 lsect);
5726 BFD_ASSERT (linker_section_ptr != NULL);
5727
5728 /* Offset will always be a multiple of four, so use the bottom bit
5729 as a "written" flag. */
5730 if ((linker_section_ptr->offset & 1) == 0)
5731 {
5732 bfd_put_32 (lsect->section->owner,
5733 relocation + linker_section_ptr->addend,
5734 lsect->section->contents + linker_section_ptr->offset);
5735 linker_section_ptr->offset += 1;
5736 }
5737
5738 relocation = (lsect->section->output_offset
5739 + linker_section_ptr->offset - 1
5740 - 0x8000);
5741
5742 #ifdef DEBUG
5743 fprintf (stderr,
5744 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5745 lsect->name, (long) relocation, (long) relocation);
5746 #endif
5747
5748 /* Subtract out the addend, because it will get added back in by the normal
5749 processing. */
5750 return relocation - linker_section_ptr->addend;
5751 }
5752
5753 /* The RELOCATE_SECTION function is called by the ELF backend linker
5754 to handle the relocations for a section.
5755
5756 The relocs are always passed as Rela structures; if the section
5757 actually uses Rel structures, the r_addend field will always be
5758 zero.
5759
5760 This function is responsible for adjust the section contents as
5761 necessary, and (if using Rela relocs and generating a
5762 relocatable output file) adjusting the reloc addend as
5763 necessary.
5764
5765 This function does not have to worry about setting the reloc
5766 address or the reloc symbol index.
5767
5768 LOCAL_SYMS is a pointer to the swapped in local symbols.
5769
5770 LOCAL_SECTIONS is an array giving the section in the input file
5771 corresponding to the st_shndx field of each local symbol.
5772
5773 The global hash table entry for the global symbols can be found
5774 via elf_sym_hashes (input_bfd).
5775
5776 When generating relocatable output, this function must handle
5777 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5778 going to be the section symbol corresponding to the output
5779 section, which means that the addend must be adjusted
5780 accordingly. */
5781
5782 static bfd_boolean
5783 ppc_elf_relocate_section (bfd *output_bfd,
5784 struct bfd_link_info *info,
5785 bfd *input_bfd,
5786 asection *input_section,
5787 bfd_byte *contents,
5788 Elf_Internal_Rela *relocs,
5789 Elf_Internal_Sym *local_syms,
5790 asection **local_sections)
5791 {
5792 Elf_Internal_Shdr *symtab_hdr;
5793 struct elf_link_hash_entry **sym_hashes;
5794 struct ppc_elf_link_hash_table *htab;
5795 Elf_Internal_Rela *rel;
5796 Elf_Internal_Rela *relend;
5797 Elf_Internal_Rela outrel;
5798 bfd_byte *loc;
5799 asection *got2, *sreloc = NULL;
5800 bfd_vma *local_got_offsets;
5801 bfd_boolean ret = TRUE;
5802 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5803
5804 #ifdef DEBUG
5805 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5806 "%ld relocations%s",
5807 input_bfd, input_section,
5808 (long) input_section->reloc_count,
5809 (info->relocatable) ? " (relocatable)" : "");
5810 #endif
5811
5812 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5813
5814 /* Initialize howto table if not already done. */
5815 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5816 ppc_elf_howto_init ();
5817
5818 htab = ppc_elf_hash_table (info);
5819 local_got_offsets = elf_local_got_offsets (input_bfd);
5820 symtab_hdr = &elf_symtab_hdr (input_bfd);
5821 sym_hashes = elf_sym_hashes (input_bfd);
5822 rel = relocs;
5823 relend = relocs + input_section->reloc_count;
5824 for (; rel < relend; rel++)
5825 {
5826 enum elf_ppc_reloc_type r_type;
5827 bfd_vma addend;
5828 bfd_reloc_status_type r;
5829 Elf_Internal_Sym *sym;
5830 asection *sec;
5831 struct elf_link_hash_entry *h;
5832 const char *sym_name;
5833 reloc_howto_type *howto;
5834 unsigned long r_symndx;
5835 bfd_vma relocation;
5836 bfd_vma branch_bit, insn, from;
5837 bfd_boolean unresolved_reloc;
5838 bfd_boolean warned;
5839 unsigned int tls_type, tls_mask, tls_gd;
5840
5841 r_type = ELF32_R_TYPE (rel->r_info);
5842 sym = NULL;
5843 sec = NULL;
5844 h = NULL;
5845 unresolved_reloc = FALSE;
5846 warned = FALSE;
5847 r_symndx = ELF32_R_SYM (rel->r_info);
5848
5849 if (r_symndx < symtab_hdr->sh_info)
5850 {
5851 sym = local_syms + r_symndx;
5852 sec = local_sections[r_symndx];
5853 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5854
5855 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5856 }
5857 else
5858 {
5859 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5860 r_symndx, symtab_hdr, sym_hashes,
5861 h, sec, relocation,
5862 unresolved_reloc, warned);
5863
5864 sym_name = h->root.root.string;
5865 }
5866
5867 if (sec != NULL && elf_discarded_section (sec))
5868 {
5869 /* For relocs against symbols from removed linkonce sections,
5870 or sections discarded by a linker script, we just want the
5871 section contents zeroed. Avoid any special processing. */
5872 howto = NULL;
5873 if (r_type < R_PPC_max)
5874 howto = ppc_elf_howto_table[r_type];
5875 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5876 rel->r_info = 0;
5877 rel->r_addend = 0;
5878 continue;
5879 }
5880
5881 if (info->relocatable)
5882 {
5883 if (got2 != NULL
5884 && r_type == R_PPC_PLTREL24
5885 && rel->r_addend >= 32768)
5886 {
5887 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5888 addend specifies the GOT pointer offset within .got2. */
5889 rel->r_addend += got2->output_offset;
5890 }
5891 continue;
5892 }
5893
5894 /* TLS optimizations. Replace instruction sequences and relocs
5895 based on information we collected in tls_optimize. We edit
5896 RELOCS so that --emit-relocs will output something sensible
5897 for the final instruction stream. */
5898 tls_mask = 0;
5899 tls_gd = 0;
5900 if (IS_PPC_TLS_RELOC (r_type))
5901 {
5902 if (h != NULL)
5903 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5904 else if (local_got_offsets != NULL)
5905 {
5906 char *lgot_masks;
5907 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5908 tls_mask = lgot_masks[r_symndx];
5909 }
5910 }
5911
5912 /* Ensure reloc mapping code below stays sane. */
5913 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5914 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5915 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5916 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5917 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5918 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5919 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5920 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5921 abort ();
5922 switch (r_type)
5923 {
5924 default:
5925 break;
5926
5927 case R_PPC_GOT_TPREL16:
5928 case R_PPC_GOT_TPREL16_LO:
5929 if (tls_mask != 0
5930 && (tls_mask & TLS_TPREL) == 0)
5931 {
5932 bfd_vma insn;
5933 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5934 insn &= 31 << 21;
5935 insn |= 0x3c020000; /* addis 0,2,0 */
5936 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5937 r_type = R_PPC_TPREL16_HA;
5938 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5939 }
5940 break;
5941
5942 case R_PPC_TLS:
5943 if (tls_mask != 0
5944 && (tls_mask & TLS_TPREL) == 0)
5945 {
5946 bfd_vma insn, rtra;
5947 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5948 if ((insn & ((31 << 26) | (31 << 11)))
5949 == ((31 << 26) | (2 << 11)))
5950 rtra = insn & ((1 << 26) - (1 << 16));
5951 else if ((insn & ((31 << 26) | (31 << 16)))
5952 == ((31 << 26) | (2 << 16)))
5953 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5954 else
5955 abort ();
5956 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5957 /* add -> addi. */
5958 insn = 14 << 26;
5959 else if ((insn & (31 << 1)) == 23 << 1
5960 && ((insn & (31 << 6)) < 14 << 6
5961 || ((insn & (31 << 6)) >= 16 << 6
5962 && (insn & (31 << 6)) < 24 << 6)))
5963 /* load and store indexed -> dform. */
5964 insn = (32 | ((insn >> 6) & 31)) << 26;
5965 else if ((insn & (31 << 1)) == 21 << 1
5966 && (insn & (0x1a << 6)) == 0)
5967 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5968 insn = (((58 | ((insn >> 6) & 4)) << 26)
5969 | ((insn >> 6) & 1));
5970 else if ((insn & (31 << 1)) == 21 << 1
5971 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5972 /* lwax -> lwa. */
5973 insn = (58 << 26) | 2;
5974 else
5975 abort ();
5976 insn |= rtra;
5977 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5978 r_type = R_PPC_TPREL16_LO;
5979 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5980
5981 /* Was PPC_TLS which sits on insn boundary, now
5982 PPC_TPREL16_LO which is at low-order half-word. */
5983 rel->r_offset += d_offset;
5984 }
5985 break;
5986
5987 case R_PPC_GOT_TLSGD16_HI:
5988 case R_PPC_GOT_TLSGD16_HA:
5989 tls_gd = TLS_TPRELGD;
5990 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5991 goto tls_gdld_hi;
5992 break;
5993
5994 case R_PPC_GOT_TLSLD16_HI:
5995 case R_PPC_GOT_TLSLD16_HA:
5996 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5997 {
5998 tls_gdld_hi:
5999 if ((tls_mask & tls_gd) != 0)
6000 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6001 + R_PPC_GOT_TPREL16);
6002 else
6003 {
6004 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6005 rel->r_offset -= d_offset;
6006 r_type = R_PPC_NONE;
6007 }
6008 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6009 }
6010 break;
6011
6012 case R_PPC_GOT_TLSGD16:
6013 case R_PPC_GOT_TLSGD16_LO:
6014 tls_gd = TLS_TPRELGD;
6015 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6016 goto tls_ldgd_opt;
6017 break;
6018
6019 case R_PPC_GOT_TLSLD16:
6020 case R_PPC_GOT_TLSLD16_LO:
6021 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6022 {
6023 bfd_vma insn1, insn2;
6024 bfd_vma offset;
6025
6026 tls_ldgd_opt:
6027 offset = rel[1].r_offset;
6028 insn1 = bfd_get_32 (output_bfd,
6029 contents + rel->r_offset - d_offset);
6030 if ((tls_mask & tls_gd) != 0)
6031 {
6032 /* IE */
6033 insn1 &= (1 << 26) - 1;
6034 insn1 |= 32 << 26; /* lwz */
6035 insn2 = 0x7c631214; /* add 3,3,2 */
6036 rel[1].r_info
6037 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6038 rel[1].r_addend = 0;
6039 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6040 + R_PPC_GOT_TPREL16);
6041 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6042 }
6043 else
6044 {
6045 /* LE */
6046 insn1 = 0x3c620000; /* addis 3,2,0 */
6047 insn2 = 0x38630000; /* addi 3,3,0 */
6048 if (tls_gd == 0)
6049 {
6050 /* Was an LD reloc. */
6051 r_symndx = 0;
6052 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6053 }
6054 r_type = R_PPC_TPREL16_HA;
6055 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6056 rel[1].r_info = ELF32_R_INFO (r_symndx,
6057 R_PPC_TPREL16_LO);
6058 rel[1].r_offset += d_offset;
6059 rel[1].r_addend = rel->r_addend;
6060 }
6061 bfd_put_32 (output_bfd, insn1,
6062 contents + rel->r_offset - d_offset);
6063 bfd_put_32 (output_bfd, insn2, contents + offset);
6064 if (tls_gd == 0)
6065 {
6066 /* We changed the symbol on an LD reloc. Start over
6067 in order to get h, sym, sec etc. right. */
6068 rel--;
6069 continue;
6070 }
6071 }
6072 break;
6073 }
6074
6075 /* Handle other relocations that tweak non-addend part of insn. */
6076 branch_bit = 0;
6077 switch (r_type)
6078 {
6079 default:
6080 break;
6081
6082 /* Branch taken prediction relocations. */
6083 case R_PPC_ADDR14_BRTAKEN:
6084 case R_PPC_REL14_BRTAKEN:
6085 branch_bit = BRANCH_PREDICT_BIT;
6086 /* Fall thru */
6087
6088 /* Branch not taken prediction relocations. */
6089 case R_PPC_ADDR14_BRNTAKEN:
6090 case R_PPC_REL14_BRNTAKEN:
6091 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6092 insn &= ~BRANCH_PREDICT_BIT;
6093 insn |= branch_bit;
6094
6095 from = (rel->r_offset
6096 + input_section->output_offset
6097 + input_section->output_section->vma);
6098
6099 /* Invert 'y' bit if not the default. */
6100 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6101 insn ^= BRANCH_PREDICT_BIT;
6102
6103 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6104 break;
6105 }
6106
6107 addend = rel->r_addend;
6108 tls_type = 0;
6109 howto = NULL;
6110 if (r_type < R_PPC_max)
6111 howto = ppc_elf_howto_table[r_type];
6112 switch (r_type)
6113 {
6114 default:
6115 (*_bfd_error_handler)
6116 (_("%B: unknown relocation type %d for symbol %s"),
6117 input_bfd, (int) r_type, sym_name);
6118
6119 bfd_set_error (bfd_error_bad_value);
6120 ret = FALSE;
6121 continue;
6122
6123 case R_PPC_NONE:
6124 case R_PPC_TLS:
6125 case R_PPC_EMB_MRKREF:
6126 case R_PPC_GNU_VTINHERIT:
6127 case R_PPC_GNU_VTENTRY:
6128 continue;
6129
6130 /* GOT16 relocations. Like an ADDR16 using the symbol's
6131 address in the GOT as relocation value instead of the
6132 symbol's value itself. Also, create a GOT entry for the
6133 symbol and put the symbol value there. */
6134 case R_PPC_GOT_TLSGD16:
6135 case R_PPC_GOT_TLSGD16_LO:
6136 case R_PPC_GOT_TLSGD16_HI:
6137 case R_PPC_GOT_TLSGD16_HA:
6138 tls_type = TLS_TLS | TLS_GD;
6139 goto dogot;
6140
6141 case R_PPC_GOT_TLSLD16:
6142 case R_PPC_GOT_TLSLD16_LO:
6143 case R_PPC_GOT_TLSLD16_HI:
6144 case R_PPC_GOT_TLSLD16_HA:
6145 tls_type = TLS_TLS | TLS_LD;
6146 goto dogot;
6147
6148 case R_PPC_GOT_TPREL16:
6149 case R_PPC_GOT_TPREL16_LO:
6150 case R_PPC_GOT_TPREL16_HI:
6151 case R_PPC_GOT_TPREL16_HA:
6152 tls_type = TLS_TLS | TLS_TPREL;
6153 goto dogot;
6154
6155 case R_PPC_GOT_DTPREL16:
6156 case R_PPC_GOT_DTPREL16_LO:
6157 case R_PPC_GOT_DTPREL16_HI:
6158 case R_PPC_GOT_DTPREL16_HA:
6159 tls_type = TLS_TLS | TLS_DTPREL;
6160 goto dogot;
6161
6162 case R_PPC_GOT16:
6163 case R_PPC_GOT16_LO:
6164 case R_PPC_GOT16_HI:
6165 case R_PPC_GOT16_HA:
6166 dogot:
6167 {
6168 /* Relocation is to the entry for this symbol in the global
6169 offset table. */
6170 bfd_vma off;
6171 bfd_vma *offp;
6172 unsigned long indx;
6173
6174 if (htab->got == NULL)
6175 abort ();
6176
6177 indx = 0;
6178 if (tls_type == (TLS_TLS | TLS_LD)
6179 && (h == NULL
6180 || !h->def_dynamic))
6181 offp = &htab->tlsld_got.offset;
6182 else if (h != NULL)
6183 {
6184 bfd_boolean dyn;
6185 dyn = htab->elf.dynamic_sections_created;
6186 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6187 || (info->shared
6188 && SYMBOL_REFERENCES_LOCAL (info, h)))
6189 /* This is actually a static link, or it is a
6190 -Bsymbolic link and the symbol is defined
6191 locally, or the symbol was forced to be local
6192 because of a version file. */
6193 ;
6194 else
6195 {
6196 indx = h->dynindx;
6197 unresolved_reloc = FALSE;
6198 }
6199 offp = &h->got.offset;
6200 }
6201 else
6202 {
6203 if (local_got_offsets == NULL)
6204 abort ();
6205 offp = &local_got_offsets[r_symndx];
6206 }
6207
6208 /* The offset must always be a multiple of 4. We use the
6209 least significant bit to record whether we have already
6210 processed this entry. */
6211 off = *offp;
6212 if ((off & 1) != 0)
6213 off &= ~1;
6214 else
6215 {
6216 unsigned int tls_m = (tls_mask
6217 & (TLS_LD | TLS_GD | TLS_DTPREL
6218 | TLS_TPREL | TLS_TPRELGD));
6219
6220 if (offp == &htab->tlsld_got.offset)
6221 tls_m = TLS_LD;
6222 else if (h == NULL
6223 || !h->def_dynamic)
6224 tls_m &= ~TLS_LD;
6225
6226 /* We might have multiple got entries for this sym.
6227 Initialize them all. */
6228 do
6229 {
6230 int tls_ty = 0;
6231
6232 if ((tls_m & TLS_LD) != 0)
6233 {
6234 tls_ty = TLS_TLS | TLS_LD;
6235 tls_m &= ~TLS_LD;
6236 }
6237 else if ((tls_m & TLS_GD) != 0)
6238 {
6239 tls_ty = TLS_TLS | TLS_GD;
6240 tls_m &= ~TLS_GD;
6241 }
6242 else if ((tls_m & TLS_DTPREL) != 0)
6243 {
6244 tls_ty = TLS_TLS | TLS_DTPREL;
6245 tls_m &= ~TLS_DTPREL;
6246 }
6247 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6248 {
6249 tls_ty = TLS_TLS | TLS_TPREL;
6250 tls_m = 0;
6251 }
6252
6253 /* Generate relocs for the dynamic linker. */
6254 if ((info->shared || indx != 0)
6255 && (h == NULL
6256 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6257 || h->root.type != bfd_link_hash_undefweak))
6258 {
6259 outrel.r_offset = (htab->got->output_section->vma
6260 + htab->got->output_offset
6261 + off);
6262 outrel.r_addend = 0;
6263 if (tls_ty & (TLS_LD | TLS_GD))
6264 {
6265 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6266 if (tls_ty == (TLS_TLS | TLS_GD))
6267 {
6268 loc = htab->relgot->contents;
6269 loc += (htab->relgot->reloc_count++
6270 * sizeof (Elf32_External_Rela));
6271 bfd_elf32_swap_reloca_out (output_bfd,
6272 &outrel, loc);
6273 outrel.r_offset += 4;
6274 outrel.r_info
6275 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6276 }
6277 }
6278 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6279 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6280 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6281 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6282 else if (indx == 0)
6283 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6284 else
6285 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6286 if (indx == 0)
6287 {
6288 outrel.r_addend += relocation;
6289 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6290 outrel.r_addend -= htab->elf.tls_sec->vma;
6291 }
6292 loc = htab->relgot->contents;
6293 loc += (htab->relgot->reloc_count++
6294 * sizeof (Elf32_External_Rela));
6295 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6296 }
6297
6298 /* Init the .got section contents if we're not
6299 emitting a reloc. */
6300 else
6301 {
6302 bfd_vma value = relocation;
6303
6304 if (tls_ty == (TLS_TLS | TLS_LD))
6305 value = 1;
6306 else if (tls_ty != 0)
6307 {
6308 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6309 if (tls_ty == (TLS_TLS | TLS_TPREL))
6310 value += DTP_OFFSET - TP_OFFSET;
6311
6312 if (tls_ty == (TLS_TLS | TLS_GD))
6313 {
6314 bfd_put_32 (output_bfd, value,
6315 htab->got->contents + off + 4);
6316 value = 1;
6317 }
6318 }
6319 bfd_put_32 (output_bfd, value,
6320 htab->got->contents + off);
6321 }
6322
6323 off += 4;
6324 if (tls_ty & (TLS_LD | TLS_GD))
6325 off += 4;
6326 }
6327 while (tls_m != 0);
6328
6329 off = *offp;
6330 *offp = off | 1;
6331 }
6332
6333 if (off >= (bfd_vma) -2)
6334 abort ();
6335
6336 if ((tls_type & TLS_TLS) != 0)
6337 {
6338 if (tls_type != (TLS_TLS | TLS_LD))
6339 {
6340 if ((tls_mask & TLS_LD) != 0
6341 && !(h == NULL
6342 || !h->def_dynamic))
6343 off += 8;
6344 if (tls_type != (TLS_TLS | TLS_GD))
6345 {
6346 if ((tls_mask & TLS_GD) != 0)
6347 off += 8;
6348 if (tls_type != (TLS_TLS | TLS_DTPREL))
6349 {
6350 if ((tls_mask & TLS_DTPREL) != 0)
6351 off += 4;
6352 }
6353 }
6354 }
6355 }
6356
6357 relocation = htab->got->output_offset + off;
6358 relocation -= htab->elf.hgot->root.u.def.value;
6359
6360 /* Addends on got relocations don't make much sense.
6361 x+off@got is actually x@got+off, and since the got is
6362 generated by a hash table traversal, the value in the
6363 got at entry m+n bears little relation to the entry m. */
6364 if (addend != 0)
6365 (*_bfd_error_handler)
6366 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6367 input_bfd,
6368 input_section,
6369 (long) rel->r_offset,
6370 howto->name,
6371 sym_name);
6372 }
6373 break;
6374
6375 /* Relocations that need no special processing. */
6376 case R_PPC_LOCAL24PC:
6377 /* It makes no sense to point a local relocation
6378 at a symbol not in this object. */
6379 if (unresolved_reloc)
6380 {
6381 if (! (*info->callbacks->undefined_symbol) (info,
6382 h->root.root.string,
6383 input_bfd,
6384 input_section,
6385 rel->r_offset,
6386 TRUE))
6387 return FALSE;
6388 continue;
6389 }
6390 break;
6391
6392 case R_PPC_DTPREL16:
6393 case R_PPC_DTPREL16_LO:
6394 case R_PPC_DTPREL16_HI:
6395 case R_PPC_DTPREL16_HA:
6396 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6397 break;
6398
6399 /* Relocations that may need to be propagated if this is a shared
6400 object. */
6401 case R_PPC_TPREL16:
6402 case R_PPC_TPREL16_LO:
6403 case R_PPC_TPREL16_HI:
6404 case R_PPC_TPREL16_HA:
6405 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6406 /* The TPREL16 relocs shouldn't really be used in shared
6407 libs as they will result in DT_TEXTREL being set, but
6408 support them anyway. */
6409 goto dodyn;
6410
6411 case R_PPC_TPREL32:
6412 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6413 goto dodyn;
6414
6415 case R_PPC_DTPREL32:
6416 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6417 goto dodyn;
6418
6419 case R_PPC_DTPMOD32:
6420 relocation = 1;
6421 addend = 0;
6422 goto dodyn;
6423
6424 case R_PPC_REL16:
6425 case R_PPC_REL16_LO:
6426 case R_PPC_REL16_HI:
6427 case R_PPC_REL16_HA:
6428 break;
6429
6430 case R_PPC_REL32:
6431 if (h == NULL || h == htab->elf.hgot)
6432 break;
6433 /* fall through */
6434
6435 case R_PPC_ADDR32:
6436 case R_PPC_ADDR16:
6437 case R_PPC_ADDR16_LO:
6438 case R_PPC_ADDR16_HI:
6439 case R_PPC_ADDR16_HA:
6440 case R_PPC_UADDR32:
6441 case R_PPC_UADDR16:
6442 goto dodyn;
6443
6444 case R_PPC_REL24:
6445 case R_PPC_REL14:
6446 case R_PPC_REL14_BRTAKEN:
6447 case R_PPC_REL14_BRNTAKEN:
6448 /* If these relocations are not to a named symbol, they can be
6449 handled right here, no need to bother the dynamic linker. */
6450 if (SYMBOL_CALLS_LOCAL (info, h)
6451 || h == htab->elf.hgot)
6452 break;
6453 /* fall through */
6454
6455 case R_PPC_ADDR24:
6456 case R_PPC_ADDR14:
6457 case R_PPC_ADDR14_BRTAKEN:
6458 case R_PPC_ADDR14_BRNTAKEN:
6459 if (h != NULL && !info->shared)
6460 break;
6461 /* fall through */
6462
6463 dodyn:
6464 if ((input_section->flags & SEC_ALLOC) == 0)
6465 break;
6466
6467 if ((info->shared
6468 && !(h != NULL
6469 && ((h->root.type == bfd_link_hash_undefined
6470 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6471 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6472 || (h->root.type == bfd_link_hash_undefweak
6473 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6474 && (MUST_BE_DYN_RELOC (r_type)
6475 || !SYMBOL_CALLS_LOCAL (info, h)))
6476 || (ELIMINATE_COPY_RELOCS
6477 && !info->shared
6478 && h != NULL
6479 && h->dynindx != -1
6480 && !h->non_got_ref
6481 && !h->def_regular))
6482 {
6483 int skip;
6484
6485 #ifdef DEBUG
6486 fprintf (stderr, "ppc_elf_relocate_section needs to "
6487 "create relocation for %s\n",
6488 (h && h->root.root.string
6489 ? h->root.root.string : "<unknown>"));
6490 #endif
6491
6492 /* When generating a shared object, these relocations
6493 are copied into the output file to be resolved at run
6494 time. */
6495 if (sreloc == NULL)
6496 {
6497 const char *name;
6498
6499 name = (bfd_elf_string_from_elf_section
6500 (input_bfd,
6501 elf_elfheader (input_bfd)->e_shstrndx,
6502 elf_section_data (input_section)->rel_hdr.sh_name));
6503 if (name == NULL)
6504 return FALSE;
6505
6506 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6507 && strcmp (bfd_get_section_name (input_bfd,
6508 input_section),
6509 name + 5) == 0);
6510
6511 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6512 BFD_ASSERT (sreloc != NULL);
6513 }
6514
6515 skip = 0;
6516 outrel.r_offset =
6517 _bfd_elf_section_offset (output_bfd, info, input_section,
6518 rel->r_offset);
6519 if (outrel.r_offset == (bfd_vma) -1
6520 || outrel.r_offset == (bfd_vma) -2)
6521 skip = (int) outrel.r_offset;
6522 outrel.r_offset += (input_section->output_section->vma
6523 + input_section->output_offset);
6524
6525 if (skip)
6526 memset (&outrel, 0, sizeof outrel);
6527 else if ((h != NULL
6528 && (h->root.type == bfd_link_hash_undefined
6529 || h->root.type == bfd_link_hash_undefweak))
6530 || !SYMBOL_REFERENCES_LOCAL (info, h))
6531 {
6532 unresolved_reloc = FALSE;
6533 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6534 outrel.r_addend = rel->r_addend;
6535 }
6536 else
6537 {
6538 outrel.r_addend = relocation + rel->r_addend;
6539
6540 if (r_type == R_PPC_ADDR32)
6541 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6542 else
6543 {
6544 long indx = 0;
6545
6546 if (bfd_is_abs_section (sec))
6547 ;
6548 else if (sec == NULL || sec->owner == NULL)
6549 {
6550 bfd_set_error (bfd_error_bad_value);
6551 ret = FALSE;
6552 }
6553 else
6554 {
6555 asection *osec;
6556
6557 /* We are turning this relocation into one
6558 against a section symbol. It would be
6559 proper to subtract the symbol's value,
6560 osec->vma, from the emitted reloc addend,
6561 but ld.so expects buggy relocs. */
6562 osec = sec->output_section;
6563 indx = elf_section_data (osec)->dynindx;
6564 if (indx == 0)
6565 {
6566 osec = htab->elf.text_index_section;
6567 indx = elf_section_data (osec)->dynindx;
6568 }
6569 BFD_ASSERT (indx != 0);
6570 #ifdef DEBUG
6571 if (indx == 0)
6572 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6573 indx, osec->name, osec->flags,
6574 h->root.root.string);
6575 #endif
6576 }
6577
6578 outrel.r_info = ELF32_R_INFO (indx, r_type);
6579 }
6580 }
6581
6582 loc = sreloc->contents;
6583 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6584 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6585
6586 if (skip == -1)
6587 continue;
6588
6589 /* This reloc will be computed at runtime. We clear the memory
6590 so that it contains predictable value. */
6591 if (! skip
6592 && ((input_section->flags & SEC_ALLOC) != 0
6593 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6594 {
6595 relocation = howto->pc_relative ? outrel.r_offset : 0;
6596 addend = 0;
6597 break;
6598 }
6599 }
6600 break;
6601
6602 case R_PPC_RELAX32PC_PLT:
6603 case R_PPC_RELAX32_PLT:
6604 {
6605 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6606
6607 if (htab->plt_type == PLT_NEW)
6608 relocation = (htab->glink->output_section->vma
6609 + htab->glink->output_offset
6610 + ent->glink_offset);
6611 else
6612 relocation = (htab->plt->output_section->vma
6613 + htab->plt->output_offset
6614 + ent->plt.offset);
6615 addend = 0;
6616 }
6617 if (r_type == R_PPC_RELAX32_PLT)
6618 goto relax32;
6619 /* Fall thru */
6620
6621 case R_PPC_RELAX32PC:
6622 relocation -= (input_section->output_section->vma
6623 + input_section->output_offset
6624 + rel->r_offset - 4);
6625 /* Fall thru */
6626
6627 case R_PPC_RELAX32:
6628 relax32:
6629 {
6630 unsigned long t0;
6631 unsigned long t1;
6632
6633 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6634 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6635
6636 /* We're clearing the bits for R_PPC_ADDR16_HA
6637 and R_PPC_ADDR16_LO here. */
6638 t0 &= ~0xffff;
6639 t1 &= ~0xffff;
6640
6641 /* t0 is HA, t1 is LO */
6642 relocation += addend;
6643 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6644 t1 |= relocation & 0xffff;
6645
6646 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6647 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6648 }
6649 continue;
6650
6651 /* Indirect .sdata relocation. */
6652 case R_PPC_EMB_SDAI16:
6653 BFD_ASSERT (htab->sdata[0].section != NULL);
6654 relocation
6655 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6656 h, relocation, rel);
6657 break;
6658
6659 /* Indirect .sdata2 relocation. */
6660 case R_PPC_EMB_SDA2I16:
6661 BFD_ASSERT (htab->sdata[1].section != NULL);
6662 relocation
6663 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6664 h, relocation, rel);
6665 break;
6666
6667 /* Handle the TOC16 reloc. We want to use the offset within the .got
6668 section, not the actual VMA. This is appropriate when generating
6669 an embedded ELF object, for which the .got section acts like the
6670 AIX .toc section. */
6671 case R_PPC_TOC16: /* phony GOT16 relocations */
6672 BFD_ASSERT (sec != NULL);
6673 BFD_ASSERT (bfd_is_und_section (sec)
6674 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6675 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6676
6677 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6678 break;
6679
6680 case R_PPC_PLTREL24:
6681 /* Relocation is to the entry for this symbol in the
6682 procedure linkage table. */
6683 {
6684 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6685
6686 addend = 0;
6687 if (ent == NULL
6688 || htab->plt == NULL)
6689 {
6690 /* We didn't make a PLT entry for this symbol. This
6691 happens when statically linking PIC code, or when
6692 using -Bsymbolic. */
6693 break;
6694 }
6695
6696 unresolved_reloc = FALSE;
6697 if (htab->plt_type == PLT_NEW)
6698 relocation = (htab->glink->output_section->vma
6699 + htab->glink->output_offset
6700 + ent->glink_offset);
6701 else
6702 relocation = (htab->plt->output_section->vma
6703 + htab->plt->output_offset
6704 + ent->plt.offset);
6705 }
6706 break;
6707
6708 /* Relocate against _SDA_BASE_. */
6709 case R_PPC_SDAREL16:
6710 {
6711 const char *name;
6712 struct elf_link_hash_entry *sh;
6713
6714 BFD_ASSERT (sec != NULL);
6715 name = bfd_get_section_name (abfd, sec->output_section);
6716 if (! ((CONST_STRNEQ (name, ".sdata")
6717 && (name[6] == 0 || name[6] == '.'))
6718 || (CONST_STRNEQ (name, ".sbss")
6719 && (name[5] == 0 || name[5] == '.'))))
6720 {
6721 (*_bfd_error_handler)
6722 (_("%B: the target (%s) of a %s relocation is "
6723 "in the wrong output section (%s)"),
6724 input_bfd,
6725 sym_name,
6726 howto->name,
6727 name);
6728 }
6729 sh = htab->sdata[0].sym;
6730 addend -= (sh->root.u.def.value
6731 + sh->root.u.def.section->output_offset
6732 + sh->root.u.def.section->output_section->vma);
6733 }
6734 break;
6735
6736 /* Relocate against _SDA2_BASE_. */
6737 case R_PPC_EMB_SDA2REL:
6738 {
6739 const char *name;
6740 struct elf_link_hash_entry *sh;
6741
6742 BFD_ASSERT (sec != NULL);
6743 name = bfd_get_section_name (abfd, sec->output_section);
6744 if (! (CONST_STRNEQ (name, ".sdata2")
6745 || CONST_STRNEQ (name, ".sbss2")))
6746 {
6747 (*_bfd_error_handler)
6748 (_("%B: the target (%s) of a %s relocation is "
6749 "in the wrong output section (%s)"),
6750 input_bfd,
6751 sym_name,
6752 howto->name,
6753 name);
6754
6755 bfd_set_error (bfd_error_bad_value);
6756 ret = FALSE;
6757 continue;
6758 }
6759 sh = htab->sdata[1].sym;
6760 addend -= (sh->root.u.def.value
6761 + sh->root.u.def.section->output_offset
6762 + sh->root.u.def.section->output_section->vma);
6763 }
6764 break;
6765
6766 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6767 case R_PPC_EMB_SDA21:
6768 case R_PPC_EMB_RELSDA:
6769 {
6770 const char *name;
6771 int reg;
6772 struct elf_link_hash_entry *sh;
6773
6774 BFD_ASSERT (sec != NULL);
6775 name = bfd_get_section_name (abfd, sec->output_section);
6776 if (((CONST_STRNEQ (name, ".sdata")
6777 && (name[6] == 0 || name[6] == '.'))
6778 || (CONST_STRNEQ (name, ".sbss")
6779 && (name[5] == 0 || name[5] == '.'))))
6780 {
6781 reg = 13;
6782 sh = htab->sdata[0].sym;
6783 addend -= (sh->root.u.def.value
6784 + sh->root.u.def.section->output_offset
6785 + sh->root.u.def.section->output_section->vma);
6786 }
6787
6788 else if (CONST_STRNEQ (name, ".sdata2")
6789 || CONST_STRNEQ (name, ".sbss2"))
6790 {
6791 reg = 2;
6792 sh = htab->sdata[1].sym;
6793 addend -= (sh->root.u.def.value
6794 + sh->root.u.def.section->output_offset
6795 + sh->root.u.def.section->output_section->vma);
6796 }
6797
6798 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6799 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6800 {
6801 reg = 0;
6802 }
6803
6804 else
6805 {
6806 (*_bfd_error_handler)
6807 (_("%B: the target (%s) of a %s relocation is "
6808 "in the wrong output section (%s)"),
6809 input_bfd,
6810 sym_name,
6811 howto->name,
6812 name);
6813
6814 bfd_set_error (bfd_error_bad_value);
6815 ret = FALSE;
6816 continue;
6817 }
6818
6819 if (r_type == R_PPC_EMB_SDA21)
6820 { /* fill in register field */
6821 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6822 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6823 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6824 }
6825 }
6826 break;
6827
6828 /* Relocate against the beginning of the section. */
6829 case R_PPC_SECTOFF:
6830 case R_PPC_SECTOFF_LO:
6831 case R_PPC_SECTOFF_HI:
6832 case R_PPC_SECTOFF_HA:
6833 BFD_ASSERT (sec != NULL);
6834 addend -= sec->output_section->vma;
6835 break;
6836
6837 /* Negative relocations. */
6838 case R_PPC_EMB_NADDR32:
6839 case R_PPC_EMB_NADDR16:
6840 case R_PPC_EMB_NADDR16_LO:
6841 case R_PPC_EMB_NADDR16_HI:
6842 case R_PPC_EMB_NADDR16_HA:
6843 addend -= 2 * relocation;
6844 break;
6845
6846 case R_PPC_COPY:
6847 case R_PPC_GLOB_DAT:
6848 case R_PPC_JMP_SLOT:
6849 case R_PPC_RELATIVE:
6850 case R_PPC_PLT32:
6851 case R_PPC_PLTREL32:
6852 case R_PPC_PLT16_LO:
6853 case R_PPC_PLT16_HI:
6854 case R_PPC_PLT16_HA:
6855 case R_PPC_ADDR30:
6856 case R_PPC_EMB_RELSEC16:
6857 case R_PPC_EMB_RELST_LO:
6858 case R_PPC_EMB_RELST_HI:
6859 case R_PPC_EMB_RELST_HA:
6860 case R_PPC_EMB_BIT_FLD:
6861 (*_bfd_error_handler)
6862 (_("%B: relocation %s is not yet supported for symbol %s."),
6863 input_bfd,
6864 howto->name,
6865 sym_name);
6866
6867 bfd_set_error (bfd_error_invalid_operation);
6868 ret = FALSE;
6869 continue;
6870 }
6871
6872 /* Do any further special processing. */
6873 switch (r_type)
6874 {
6875 default:
6876 break;
6877
6878 case R_PPC_ADDR16_HA:
6879 case R_PPC_REL16_HA:
6880 case R_PPC_SECTOFF_HA:
6881 case R_PPC_TPREL16_HA:
6882 case R_PPC_DTPREL16_HA:
6883 case R_PPC_EMB_NADDR16_HA:
6884 case R_PPC_EMB_RELST_HA:
6885 /* It's just possible that this symbol is a weak symbol
6886 that's not actually defined anywhere. In that case,
6887 'sec' would be NULL, and we should leave the symbol
6888 alone (it will be set to zero elsewhere in the link). */
6889 if (sec == NULL)
6890 break;
6891 /* Fall thru */
6892
6893 case R_PPC_PLT16_HA:
6894 case R_PPC_GOT16_HA:
6895 case R_PPC_GOT_TLSGD16_HA:
6896 case R_PPC_GOT_TLSLD16_HA:
6897 case R_PPC_GOT_TPREL16_HA:
6898 case R_PPC_GOT_DTPREL16_HA:
6899 /* Add 0x10000 if sign bit in 0:15 is set.
6900 Bits 0:15 are not used. */
6901 addend += 0x8000;
6902 break;
6903 }
6904
6905 #ifdef DEBUG
6906 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6907 "offset = %ld, addend = %ld\n",
6908 howto->name,
6909 (int) r_type,
6910 sym_name,
6911 r_symndx,
6912 (long) rel->r_offset,
6913 (long) addend);
6914 #endif
6915
6916 if (unresolved_reloc
6917 && !((input_section->flags & SEC_DEBUGGING) != 0
6918 && h->def_dynamic))
6919 {
6920 (*_bfd_error_handler)
6921 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6922 input_bfd,
6923 input_section,
6924 (long) rel->r_offset,
6925 howto->name,
6926 sym_name);
6927 ret = FALSE;
6928 }
6929
6930 r = _bfd_final_link_relocate (howto,
6931 input_bfd,
6932 input_section,
6933 contents,
6934 rel->r_offset,
6935 relocation,
6936 addend);
6937
6938 if (r != bfd_reloc_ok)
6939 {
6940 if (r == bfd_reloc_overflow)
6941 {
6942 if (warned)
6943 continue;
6944 if (h != NULL
6945 && h->root.type == bfd_link_hash_undefweak
6946 && howto->pc_relative)
6947 {
6948 /* Assume this is a call protected by other code that
6949 detect the symbol is undefined. If this is the case,
6950 we can safely ignore the overflow. If not, the
6951 program is hosed anyway, and a little warning isn't
6952 going to help. */
6953
6954 continue;
6955 }
6956
6957 if (! (*info->callbacks->reloc_overflow) (info,
6958 (h ? &h->root : NULL),
6959 sym_name,
6960 howto->name,
6961 rel->r_addend,
6962 input_bfd,
6963 input_section,
6964 rel->r_offset))
6965 return FALSE;
6966 }
6967 else
6968 {
6969 (*_bfd_error_handler)
6970 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6971 input_bfd, input_section,
6972 (long) rel->r_offset, howto->name, sym_name, (int) r);
6973 ret = FALSE;
6974 }
6975 }
6976 }
6977
6978 #ifdef DEBUG
6979 fprintf (stderr, "\n");
6980 #endif
6981
6982 return ret;
6983 }
6984 \f
6985 #define PPC_LO(v) ((v) & 0xffff)
6986 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6987 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6988
6989 /* Finish up dynamic symbol handling. We set the contents of various
6990 dynamic sections here. */
6991
6992 static bfd_boolean
6993 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6994 struct bfd_link_info *info,
6995 struct elf_link_hash_entry *h,
6996 Elf_Internal_Sym *sym)
6997 {
6998 struct ppc_elf_link_hash_table *htab;
6999 struct plt_entry *ent;
7000 bfd_boolean doneone;
7001
7002 #ifdef DEBUG
7003 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7004 h->root.root.string);
7005 #endif
7006
7007 htab = ppc_elf_hash_table (info);
7008 BFD_ASSERT (htab->elf.dynobj != NULL);
7009
7010 doneone = FALSE;
7011 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7012 if (ent->plt.offset != (bfd_vma) -1)
7013 {
7014 if (!doneone)
7015 {
7016 Elf_Internal_Rela rela;
7017 bfd_byte *loc;
7018 bfd_vma reloc_index;
7019
7020 if (htab->plt_type == PLT_NEW)
7021 reloc_index = ent->plt.offset / 4;
7022 else
7023 {
7024 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7025 / htab->plt_slot_size);
7026 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7027 && htab->plt_type == PLT_OLD)
7028 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7029 }
7030
7031 /* This symbol has an entry in the procedure linkage table.
7032 Set it up. */
7033 if (htab->plt_type == PLT_VXWORKS)
7034 {
7035 bfd_vma got_offset;
7036 const bfd_vma *plt_entry;
7037
7038 /* The first three entries in .got.plt are reserved. */
7039 got_offset = (reloc_index + 3) * 4;
7040
7041 /* Use the right PLT. */
7042 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7043 : ppc_elf_vxworks_plt_entry;
7044
7045 /* Fill in the .plt on VxWorks. */
7046 if (info->shared)
7047 {
7048 bfd_vma got_offset_hi = (got_offset >> 16)
7049 + ((got_offset & 0x8000) >> 15);
7050
7051 bfd_put_32 (output_bfd,
7052 plt_entry[0] | (got_offset_hi & 0xffff),
7053 htab->plt->contents + ent->plt.offset + 0);
7054 bfd_put_32 (output_bfd,
7055 plt_entry[1] | (got_offset & 0xffff),
7056 htab->plt->contents + ent->plt.offset + 4);
7057 }
7058 else
7059 {
7060 bfd_vma got_loc
7061 = (got_offset
7062 + htab->elf.hgot->root.u.def.value
7063 + htab->elf.hgot->root.u.def.section->output_offset
7064 + htab->elf.hgot->root.u.def.section->output_section->vma);
7065 bfd_vma got_loc_hi = (got_loc >> 16)
7066 + ((got_loc & 0x8000) >> 15);
7067
7068 bfd_put_32 (output_bfd,
7069 plt_entry[0] | (got_loc_hi & 0xffff),
7070 htab->plt->contents + ent->plt.offset + 0);
7071 bfd_put_32 (output_bfd,
7072 plt_entry[1] | (got_loc & 0xffff),
7073 htab->plt->contents + ent->plt.offset + 4);
7074 }
7075
7076 bfd_put_32 (output_bfd, plt_entry[2],
7077 htab->plt->contents + ent->plt.offset + 8);
7078 bfd_put_32 (output_bfd, plt_entry[3],
7079 htab->plt->contents + ent->plt.offset + 12);
7080
7081 /* This instruction is an immediate load. The value loaded is
7082 the byte offset of the R_PPC_JMP_SLOT relocation from the
7083 start of the .rela.plt section. The value is stored in the
7084 low-order 16 bits of the load instruction. */
7085 /* NOTE: It appears that this is now an index rather than a
7086 prescaled offset. */
7087 bfd_put_32 (output_bfd,
7088 plt_entry[4] | reloc_index,
7089 htab->plt->contents + ent->plt.offset + 16);
7090 /* This instruction is a PC-relative branch whose target is
7091 the start of the PLT section. The address of this branch
7092 instruction is 20 bytes beyond the start of this PLT entry.
7093 The address is encoded in bits 6-29, inclusive. The value
7094 stored is right-shifted by two bits, permitting a 26-bit
7095 offset. */
7096 bfd_put_32 (output_bfd,
7097 (plt_entry[5]
7098 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7099 htab->plt->contents + ent->plt.offset + 20);
7100 bfd_put_32 (output_bfd, plt_entry[6],
7101 htab->plt->contents + ent->plt.offset + 24);
7102 bfd_put_32 (output_bfd, plt_entry[7],
7103 htab->plt->contents + ent->plt.offset + 28);
7104
7105 /* Fill in the GOT entry corresponding to this PLT slot with
7106 the address immediately after the the "bctr" instruction
7107 in this PLT entry. */
7108 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7109 + htab->plt->output_offset
7110 + ent->plt.offset + 16),
7111 htab->sgotplt->contents + got_offset);
7112
7113 if (!info->shared)
7114 {
7115 /* Fill in a couple of entries in .rela.plt.unloaded. */
7116 loc = htab->srelplt2->contents
7117 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7118 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7119 * sizeof (Elf32_External_Rela));
7120
7121 /* Provide the @ha relocation for the first instruction. */
7122 rela.r_offset = (htab->plt->output_section->vma
7123 + htab->plt->output_offset
7124 + ent->plt.offset + 2);
7125 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7126 R_PPC_ADDR16_HA);
7127 rela.r_addend = got_offset;
7128 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7129 loc += sizeof (Elf32_External_Rela);
7130
7131 /* Provide the @l relocation for the second instruction. */
7132 rela.r_offset = (htab->plt->output_section->vma
7133 + htab->plt->output_offset
7134 + ent->plt.offset + 6);
7135 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7136 R_PPC_ADDR16_LO);
7137 rela.r_addend = got_offset;
7138 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7139 loc += sizeof (Elf32_External_Rela);
7140
7141 /* Provide a relocation for the GOT entry corresponding to this
7142 PLT slot. Point it at the middle of the .plt entry. */
7143 rela.r_offset = (htab->sgotplt->output_section->vma
7144 + htab->sgotplt->output_offset
7145 + got_offset);
7146 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7147 R_PPC_ADDR32);
7148 rela.r_addend = ent->plt.offset + 16;
7149 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7150 }
7151
7152 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7153 In particular, the offset for the relocation is not the
7154 address of the PLT entry for this function, as specified
7155 by the ABI. Instead, the offset is set to the address of
7156 the GOT slot for this function. See EABI 4.4.4.1. */
7157 rela.r_offset = (htab->sgotplt->output_section->vma
7158 + htab->sgotplt->output_offset
7159 + got_offset);
7160
7161 }
7162 else
7163 {
7164 rela.r_offset = (htab->plt->output_section->vma
7165 + htab->plt->output_offset
7166 + ent->plt.offset);
7167 if (htab->plt_type == PLT_OLD)
7168 {
7169 /* We don't need to fill in the .plt. The ppc dynamic
7170 linker will fill it in. */
7171 }
7172 else
7173 {
7174 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7175 + htab->glink->output_section->vma
7176 + htab->glink->output_offset);
7177 bfd_put_32 (output_bfd, val,
7178 htab->plt->contents + ent->plt.offset);
7179 }
7180 }
7181
7182 /* Fill in the entry in the .rela.plt section. */
7183 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7184 rela.r_addend = 0;
7185
7186 loc = (htab->relplt->contents
7187 + reloc_index * sizeof (Elf32_External_Rela));
7188 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7189
7190 if (!h->def_regular)
7191 {
7192 /* Mark the symbol as undefined, rather than as
7193 defined in the .plt section. Leave the value if
7194 there were any relocations where pointer equality
7195 matters (this is a clue for the dynamic linker, to
7196 make function pointer comparisons work between an
7197 application and shared library), otherwise set it
7198 to zero. */
7199 sym->st_shndx = SHN_UNDEF;
7200 if (!h->pointer_equality_needed)
7201 sym->st_value = 0;
7202 else if (!h->ref_regular_nonweak)
7203 {
7204 /* This breaks function pointer comparisons, but
7205 that is better than breaking tests for a NULL
7206 function pointer. */
7207 sym->st_value = 0;
7208 }
7209 }
7210 doneone = TRUE;
7211 }
7212
7213 if (htab->plt_type == PLT_NEW)
7214 {
7215 bfd_vma plt;
7216 unsigned char *p;
7217
7218 plt = (ent->plt.offset
7219 + htab->plt->output_section->vma
7220 + htab->plt->output_offset);
7221 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7222
7223 if (info->shared || info->pie)
7224 {
7225 bfd_vma got = 0;
7226
7227 if (ent->addend >= 32768)
7228 got = (ent->addend
7229 + ent->sec->output_section->vma
7230 + ent->sec->output_offset);
7231 else if (htab->elf.hgot != NULL)
7232 got = (htab->elf.hgot->root.u.def.value
7233 + htab->elf.hgot->root.u.def.section->output_section->vma
7234 + htab->elf.hgot->root.u.def.section->output_offset);
7235
7236 plt -= got;
7237
7238 if (plt + 0x8000 < 0x10000)
7239 {
7240 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7241 p += 4;
7242 bfd_put_32 (output_bfd, MTCTR_11, p);
7243 p += 4;
7244 bfd_put_32 (output_bfd, BCTR, p);
7245 p += 4;
7246 bfd_put_32 (output_bfd, NOP, p);
7247 p += 4;
7248 }
7249 else
7250 {
7251 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7252 p += 4;
7253 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7254 p += 4;
7255 bfd_put_32 (output_bfd, MTCTR_11, p);
7256 p += 4;
7257 bfd_put_32 (output_bfd, BCTR, p);
7258 p += 4;
7259 }
7260 }
7261 else
7262 {
7263 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7264 p += 4;
7265 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7266 p += 4;
7267 bfd_put_32 (output_bfd, MTCTR_11, p);
7268 p += 4;
7269 bfd_put_32 (output_bfd, BCTR, p);
7270 p += 4;
7271
7272 /* We only need one non-PIC glink stub. */
7273 break;
7274 }
7275 }
7276 else
7277 break;
7278 }
7279
7280 if (h->needs_copy)
7281 {
7282 asection *s;
7283 Elf_Internal_Rela rela;
7284 bfd_byte *loc;
7285
7286 /* This symbols needs a copy reloc. Set it up. */
7287
7288 #ifdef DEBUG
7289 fprintf (stderr, ", copy");
7290 #endif
7291
7292 BFD_ASSERT (h->dynindx != -1);
7293
7294 if (ppc_elf_hash_entry (h)->has_sda_refs)
7295 s = htab->relsbss;
7296 else
7297 s = htab->relbss;
7298 BFD_ASSERT (s != NULL);
7299
7300 rela.r_offset = (h->root.u.def.value
7301 + h->root.u.def.section->output_section->vma
7302 + h->root.u.def.section->output_offset);
7303 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7304 rela.r_addend = 0;
7305 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7306 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7307 }
7308
7309 #ifdef DEBUG
7310 fprintf (stderr, "\n");
7311 #endif
7312
7313 /* Mark some specially defined symbols as absolute. */
7314 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7315 || (!htab->is_vxworks
7316 && (h == htab->elf.hgot
7317 || strcmp (h->root.root.string,
7318 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7319 sym->st_shndx = SHN_ABS;
7320
7321 return TRUE;
7322 }
7323 \f
7324 static enum elf_reloc_type_class
7325 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7326 {
7327 switch (ELF32_R_TYPE (rela->r_info))
7328 {
7329 case R_PPC_RELATIVE:
7330 return reloc_class_relative;
7331 case R_PPC_REL24:
7332 case R_PPC_ADDR24:
7333 case R_PPC_JMP_SLOT:
7334 return reloc_class_plt;
7335 case R_PPC_COPY:
7336 return reloc_class_copy;
7337 default:
7338 return reloc_class_normal;
7339 }
7340 }
7341 \f
7342 /* Finish up the dynamic sections. */
7343
7344 static bfd_boolean
7345 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7346 struct bfd_link_info *info)
7347 {
7348 asection *sdyn;
7349 asection *splt;
7350 struct ppc_elf_link_hash_table *htab;
7351 bfd_vma got;
7352 bfd * dynobj;
7353
7354 #ifdef DEBUG
7355 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7356 #endif
7357
7358 htab = ppc_elf_hash_table (info);
7359 dynobj = elf_hash_table (info)->dynobj;
7360 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7361 if (htab->is_vxworks)
7362 splt = bfd_get_section_by_name (dynobj, ".plt");
7363 else
7364 splt = NULL;
7365
7366 got = 0;
7367 if (htab->elf.hgot != NULL)
7368 got = (htab->elf.hgot->root.u.def.value
7369 + htab->elf.hgot->root.u.def.section->output_section->vma
7370 + htab->elf.hgot->root.u.def.section->output_offset);
7371
7372 if (htab->elf.dynamic_sections_created)
7373 {
7374 Elf32_External_Dyn *dyncon, *dynconend;
7375
7376 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7377
7378 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7379 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7380 for (; dyncon < dynconend; dyncon++)
7381 {
7382 Elf_Internal_Dyn dyn;
7383 asection *s;
7384
7385 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7386
7387 switch (dyn.d_tag)
7388 {
7389 case DT_PLTGOT:
7390 if (htab->is_vxworks)
7391 s = htab->sgotplt;
7392 else
7393 s = htab->plt;
7394 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7395 break;
7396
7397 case DT_PLTRELSZ:
7398 dyn.d_un.d_val = htab->relplt->size;
7399 break;
7400
7401 case DT_JMPREL:
7402 s = htab->relplt;
7403 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7404 break;
7405
7406 case DT_PPC_GOT:
7407 dyn.d_un.d_ptr = got;
7408 break;
7409
7410 case DT_RELASZ:
7411 if (htab->is_vxworks)
7412 {
7413 if (htab->relplt)
7414 dyn.d_un.d_ptr -= htab->relplt->size;
7415 break;
7416 }
7417 continue;
7418
7419 default:
7420 if (htab->is_vxworks
7421 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7422 break;
7423 continue;
7424 }
7425
7426 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7427 }
7428 }
7429
7430 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7431 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7432 if (htab->got != NULL)
7433 {
7434 unsigned char *p = htab->got->contents;
7435 bfd_vma val;
7436
7437 p += htab->elf.hgot->root.u.def.value;
7438 if (htab->plt_type == PLT_OLD)
7439 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7440
7441 val = 0;
7442 if (sdyn != NULL)
7443 val = sdyn->output_section->vma + sdyn->output_offset;
7444 bfd_put_32 (output_bfd, val, p);
7445
7446 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7447 }
7448
7449 /* Fill in the first entry in the VxWorks procedure linkage table. */
7450 if (splt && splt->size > 0)
7451 {
7452 /* Use the right PLT. */
7453 static const bfd_vma *plt_entry = NULL;
7454 plt_entry = info->shared ?
7455 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7456
7457 if (!info->shared)
7458 {
7459 bfd_vma got_value =
7460 (htab->elf.hgot->root.u.def.section->output_section->vma
7461 + htab->elf.hgot->root.u.def.section->output_offset
7462 + htab->elf.hgot->root.u.def.value);
7463 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7464
7465 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7466 splt->contents + 0);
7467 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7468 splt->contents + 4);
7469 }
7470 else
7471 {
7472 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7473 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7474 }
7475 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7476 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7477 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7478 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7479 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7480 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7481
7482 if (! info->shared)
7483 {
7484 Elf_Internal_Rela rela;
7485 bfd_byte *loc;
7486
7487 loc = htab->srelplt2->contents;
7488
7489 /* Output the @ha relocation for the first instruction. */
7490 rela.r_offset = (htab->plt->output_section->vma
7491 + htab->plt->output_offset
7492 + 2);
7493 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7494 rela.r_addend = 0;
7495 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7496 loc += sizeof (Elf32_External_Rela);
7497
7498 /* Output the @l relocation for the second instruction. */
7499 rela.r_offset = (htab->plt->output_section->vma
7500 + htab->plt->output_offset
7501 + 6);
7502 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7503 rela.r_addend = 0;
7504 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7505 loc += sizeof (Elf32_External_Rela);
7506
7507 /* Fix up the remaining relocations. They may have the wrong
7508 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7509 in which symbols were output. */
7510 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7511 {
7512 Elf_Internal_Rela rel;
7513
7514 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7515 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7516 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7517 loc += sizeof (Elf32_External_Rela);
7518
7519 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7520 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7521 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7522 loc += sizeof (Elf32_External_Rela);
7523
7524 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7525 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7526 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7527 loc += sizeof (Elf32_External_Rela);
7528 }
7529 }
7530 }
7531
7532 if (htab->glink != NULL && htab->glink->contents != NULL)
7533 {
7534 unsigned char *p;
7535 unsigned char *endp;
7536 bfd_vma res0;
7537 unsigned int i;
7538
7539 /*
7540 * PIC glink code is the following:
7541 *
7542 * # ith PLT code stub.
7543 * addis 11,30,(plt+(i-1)*4-got)@ha
7544 * lwz 11,(plt+(i-1)*4-got)@l(11)
7545 * mtctr 11
7546 * bctr
7547 *
7548 * # A table of branches, one for each plt entry.
7549 * # The idea is that the plt call stub loads ctr and r11 with these
7550 * # addresses, so (r11 - res_0) gives the plt index * 4.
7551 * res_0: b PLTresolve
7552 * res_1: b PLTresolve
7553 * .
7554 * # Some number of entries towards the end can be nops
7555 * res_n_m3: nop
7556 * res_n_m2: nop
7557 * res_n_m1:
7558 *
7559 * PLTresolve:
7560 * addis 11,11,(1f-res_0)@ha
7561 * mflr 0
7562 * bcl 20,31,1f
7563 * 1: addi 11,11,(1b-res_0)@l
7564 * mflr 12
7565 * mtlr 0
7566 * sub 11,11,12 # r11 = index * 4
7567 * addis 12,12,(got+4-1b)@ha
7568 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7569 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7570 * mtctr 0
7571 * add 0,11,11
7572 * add 11,0,11 # r11 = index * 12 = reloc offset.
7573 * bctr
7574 */
7575 static const unsigned int pic_plt_resolve[] =
7576 {
7577 ADDIS_11_11,
7578 MFLR_0,
7579 BCL_20_31,
7580 ADDI_11_11,
7581 MFLR_12,
7582 MTLR_0,
7583 SUB_11_11_12,
7584 ADDIS_12_12,
7585 LWZ_0_12,
7586 LWZ_12_12,
7587 MTCTR_0,
7588 ADD_0_11_11,
7589 ADD_11_0_11,
7590 BCTR,
7591 NOP,
7592 NOP
7593 };
7594
7595 /*
7596 * Non-PIC glink code is a little simpler.
7597 *
7598 * # ith PLT code stub.
7599 * lis 11,(plt+(i-1)*4)@ha
7600 * lwz 11,(plt+(i-1)*4)@l(11)
7601 * mtctr 11
7602 * bctr
7603 *
7604 * The branch table is the same, then comes
7605 *
7606 * PLTresolve:
7607 * lis 12,(got+4)@ha
7608 * addis 11,11,(-res_0)@ha
7609 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7610 * addi 11,11,(-res_0)@l # r11 = index * 4
7611 * mtctr 0
7612 * add 0,11,11
7613 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7614 * add 11,0,11 # r11 = index * 12 = reloc offset.
7615 * bctr
7616 */
7617 static const unsigned int plt_resolve[] =
7618 {
7619 LIS_12,
7620 ADDIS_11_11,
7621 LWZ_0_12,
7622 ADDI_11_11,
7623 MTCTR_0,
7624 ADD_0_11_11,
7625 LWZ_12_12,
7626 ADD_11_0_11,
7627 BCTR,
7628 NOP,
7629 NOP,
7630 NOP,
7631 NOP,
7632 NOP,
7633 NOP,
7634 NOP
7635 };
7636
7637 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7638 abort ();
7639 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7640 abort ();
7641
7642 /* Build the branch table, one for each plt entry (less one),
7643 and perhaps some padding. */
7644 p = htab->glink->contents;
7645 p += htab->glink_pltresolve;
7646 endp = htab->glink->contents;
7647 endp += htab->glink->size - GLINK_PLTRESOLVE;
7648 while (p < endp - 8 * 4)
7649 {
7650 bfd_put_32 (output_bfd, B + endp - p, p);
7651 p += 4;
7652 }
7653 while (p < endp)
7654 {
7655 bfd_put_32 (output_bfd, NOP, p);
7656 p += 4;
7657 }
7658
7659 res0 = (htab->glink_pltresolve
7660 + htab->glink->output_section->vma
7661 + htab->glink->output_offset);
7662
7663 /* Last comes the PLTresolve stub. */
7664 if (info->shared || info->pie)
7665 {
7666 bfd_vma bcl;
7667
7668 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7669 {
7670 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7671 p += 4;
7672 }
7673 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7674
7675 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7676 + htab->glink->output_section->vma
7677 + htab->glink->output_offset);
7678
7679 bfd_put_32 (output_bfd,
7680 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7681 bfd_put_32 (output_bfd,
7682 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7683 bfd_put_32 (output_bfd,
7684 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7685 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7686 {
7687 bfd_put_32 (output_bfd,
7688 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7689 bfd_put_32 (output_bfd,
7690 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7691 }
7692 else
7693 {
7694 bfd_put_32 (output_bfd,
7695 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7696 bfd_put_32 (output_bfd,
7697 LWZ_12_12 + 4, p + 9*4);
7698 }
7699 }
7700 else
7701 {
7702 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7703 {
7704 bfd_put_32 (output_bfd, plt_resolve[i], p);
7705 p += 4;
7706 }
7707 p -= 4 * ARRAY_SIZE (plt_resolve);
7708
7709 bfd_put_32 (output_bfd,
7710 LIS_12 + PPC_HA (got + 4), p + 0*4);
7711 bfd_put_32 (output_bfd,
7712 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7713 bfd_put_32 (output_bfd,
7714 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7715 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7716 {
7717 bfd_put_32 (output_bfd,
7718 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7719 bfd_put_32 (output_bfd,
7720 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7721 }
7722 else
7723 {
7724 bfd_put_32 (output_bfd,
7725 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7726 bfd_put_32 (output_bfd,
7727 LWZ_12_12 + 4, p + 6*4);
7728 }
7729 }
7730 }
7731
7732 return TRUE;
7733 }
7734 \f
7735 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7736 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7737 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7738 #define TARGET_BIG_NAME "elf32-powerpc"
7739 #define ELF_ARCH bfd_arch_powerpc
7740 #define ELF_MACHINE_CODE EM_PPC
7741 #ifdef __QNXTARGET__
7742 #define ELF_MAXPAGESIZE 0x1000
7743 #else
7744 #define ELF_MAXPAGESIZE 0x10000
7745 #endif
7746 #define ELF_MINPAGESIZE 0x1000
7747 #define ELF_COMMONPAGESIZE 0x1000
7748 #define elf_info_to_howto ppc_elf_info_to_howto
7749
7750 #ifdef EM_CYGNUS_POWERPC
7751 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7752 #endif
7753
7754 #ifdef EM_PPC_OLD
7755 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7756 #endif
7757
7758 #define elf_backend_plt_not_loaded 1
7759 #define elf_backend_can_gc_sections 1
7760 #define elf_backend_can_refcount 1
7761 #define elf_backend_rela_normal 1
7762
7763 #define bfd_elf32_mkobject ppc_elf_mkobject
7764 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7765 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7766 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7767 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7768 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7769 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7770
7771 #define elf_backend_object_p ppc_elf_object_p
7772 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7773 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7774 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7775 #define elf_backend_relocate_section ppc_elf_relocate_section
7776 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7777 #define elf_backend_check_relocs ppc_elf_check_relocs
7778 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7779 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7780 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7781 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7782 #define elf_backend_hash_symbol ppc_elf_hash_symbol
7783 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7784 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7785 #define elf_backend_fake_sections ppc_elf_fake_sections
7786 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7787 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7788 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7789 #define elf_backend_write_core_note ppc_elf_write_core_note
7790 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7791 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7792 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7793 #define elf_backend_write_section ppc_elf_write_section
7794 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7795 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7796 #define elf_backend_action_discarded ppc_elf_action_discarded
7797 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7798
7799 #include "elf32-target.h"
7800
7801 /* VxWorks Target */
7802
7803 #undef TARGET_LITTLE_SYM
7804 #undef TARGET_LITTLE_NAME
7805
7806 #undef TARGET_BIG_SYM
7807 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7808 #undef TARGET_BIG_NAME
7809 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7810
7811 /* VxWorks uses the elf default section flags for .plt. */
7812 static const struct bfd_elf_special_section *
7813 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7814 {
7815 if (sec->name == NULL)
7816 return NULL;
7817
7818 if (strcmp (sec->name, ".plt") == 0)
7819 return _bfd_elf_get_sec_type_attr (abfd, sec);
7820
7821 return ppc_elf_get_sec_type_attr (abfd, sec);
7822 }
7823
7824 /* Like ppc_elf_link_hash_table_create, but overrides
7825 appropriately for VxWorks. */
7826 static struct bfd_link_hash_table *
7827 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7828 {
7829 struct bfd_link_hash_table *ret;
7830
7831 ret = ppc_elf_link_hash_table_create (abfd);
7832 if (ret)
7833 {
7834 struct ppc_elf_link_hash_table *htab
7835 = (struct ppc_elf_link_hash_table *)ret;
7836 htab->is_vxworks = 1;
7837 htab->plt_type = PLT_VXWORKS;
7838 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7839 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7840 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7841 }
7842 return ret;
7843 }
7844
7845 /* Tweak magic VxWorks symbols as they are loaded. */
7846 static bfd_boolean
7847 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7848 struct bfd_link_info *info,
7849 Elf_Internal_Sym *sym,
7850 const char **namep ATTRIBUTE_UNUSED,
7851 flagword *flagsp ATTRIBUTE_UNUSED,
7852 asection **secp,
7853 bfd_vma *valp)
7854 {
7855 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7856 valp))
7857 return FALSE;
7858
7859 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7860 }
7861
7862 static void
7863 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7864 {
7865 ppc_elf_final_write_processing(abfd, linker);
7866 elf_vxworks_final_write_processing(abfd, linker);
7867 }
7868
7869 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7870 define it. */
7871 #undef elf_backend_want_plt_sym
7872 #define elf_backend_want_plt_sym 1
7873 #undef elf_backend_want_got_plt
7874 #define elf_backend_want_got_plt 1
7875 #undef elf_backend_got_symbol_offset
7876 #define elf_backend_got_symbol_offset 0
7877 #undef elf_backend_plt_not_loaded
7878 #define elf_backend_plt_not_loaded 0
7879 #undef elf_backend_plt_readonly
7880 #define elf_backend_plt_readonly 1
7881 #undef elf_backend_got_header_size
7882 #define elf_backend_got_header_size 12
7883
7884 #undef bfd_elf32_bfd_link_hash_table_create
7885 #define bfd_elf32_bfd_link_hash_table_create \
7886 ppc_elf_vxworks_link_hash_table_create
7887 #undef elf_backend_add_symbol_hook
7888 #define elf_backend_add_symbol_hook \
7889 ppc_elf_vxworks_add_symbol_hook
7890 #undef elf_backend_link_output_symbol_hook
7891 #define elf_backend_link_output_symbol_hook \
7892 elf_vxworks_link_output_symbol_hook
7893 #undef elf_backend_final_write_processing
7894 #define elf_backend_final_write_processing \
7895 ppc_elf_vxworks_final_write_processing
7896 #undef elf_backend_get_sec_type_attr
7897 #define elf_backend_get_sec_type_attr \
7898 ppc_elf_vxworks_get_sec_type_attr
7899 #undef elf_backend_emit_relocs
7900 #define elf_backend_emit_relocs \
7901 elf_vxworks_emit_relocs
7902
7903 #undef elf32_bed
7904 #define elf32_bed ppc_elf_vxworks_bed
7905
7906 #include "elf32-target.h"
GDB Binutils - Deliverables
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