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* elf-bfd.h (enum elf_object_id): Add HPPA_ELF_TDATA.
[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
2700 /* If we were called to copy over info for a weak sym, that's all. */
2701 if (eind->elf.root.type != bfd_link_hash_indirect)
2702 return;
2703
2704 /* Copy over the GOT refcount entries that we may have already seen to
2705 the symbol which just became indirect. */
2706 edir->elf.got.refcount += eind->elf.got.refcount;
2707 eind->elf.got.refcount = 0;
2708
2709 /* And plt entries. */
2710 if (eind->elf.plt.plist != NULL)
2711 {
2712 if (edir->elf.plt.plist != NULL)
2713 {
2714 struct plt_entry **entp;
2715 struct plt_entry *ent;
2716
2717 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2718 {
2719 struct plt_entry *dent;
2720
2721 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2722 if (dent->sec == ent->sec && dent->addend == ent->addend)
2723 {
2724 dent->plt.refcount += ent->plt.refcount;
2725 *entp = ent->next;
2726 break;
2727 }
2728 if (dent == NULL)
2729 entp = &ent->next;
2730 }
2731 *entp = edir->elf.plt.plist;
2732 }
2733
2734 edir->elf.plt.plist = eind->elf.plt.plist;
2735 eind->elf.plt.plist = NULL;
2736 }
2737
2738 if (eind->elf.dynindx != -1)
2739 {
2740 if (edir->elf.dynindx != -1)
2741 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2742 edir->elf.dynstr_index);
2743 edir->elf.dynindx = eind->elf.dynindx;
2744 edir->elf.dynstr_index = eind->elf.dynstr_index;
2745 eind->elf.dynindx = -1;
2746 eind->elf.dynstr_index = 0;
2747 }
2748 }
2749
2750 /* Hook called by the linker routine which adds symbols from an object
2751 file. We use it to put .comm items in .sbss, and not .bss. */
2752
2753 static bfd_boolean
2754 ppc_elf_add_symbol_hook (bfd *abfd,
2755 struct bfd_link_info *info,
2756 Elf_Internal_Sym *sym,
2757 const char **namep ATTRIBUTE_UNUSED,
2758 flagword *flagsp ATTRIBUTE_UNUSED,
2759 asection **secp,
2760 bfd_vma *valp)
2761 {
2762 if (sym->st_shndx == SHN_COMMON
2763 && !info->relocatable
2764 && is_ppc_elf (info->output_bfd)
2765 && sym->st_size <= elf_gp_size (abfd))
2766 {
2767 /* Common symbols less than or equal to -G nn bytes are automatically
2768 put into .sbss. */
2769 struct ppc_elf_link_hash_table *htab;
2770
2771 htab = ppc_elf_hash_table (info);
2772 if (htab->sbss == NULL)
2773 {
2774 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2775
2776 if (!htab->elf.dynobj)
2777 htab->elf.dynobj = abfd;
2778
2779 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2780 ".sbss",
2781 flags);
2782 if (htab->sbss == NULL)
2783 return FALSE;
2784 }
2785
2786 *secp = htab->sbss;
2787 *valp = sym->st_size;
2788 }
2789
2790 return TRUE;
2791 }
2792 \f
2793 static bfd_boolean
2794 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2795 elf_linker_section_t *lsect)
2796 {
2797 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2798 TRUE, FALSE, TRUE);
2799 if (lsect->sym == NULL)
2800 return FALSE;
2801 if (lsect->sym->root.type == bfd_link_hash_new)
2802 lsect->sym->non_elf = 0;
2803 lsect->sym->ref_regular = 1;
2804 return TRUE;
2805 }
2806
2807 /* Create a special linker section. */
2808
2809 static bfd_boolean
2810 ppc_elf_create_linker_section (bfd *abfd,
2811 struct bfd_link_info *info,
2812 flagword flags,
2813 elf_linker_section_t *lsect)
2814 {
2815 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2816 asection *s;
2817
2818 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2819 | SEC_LINKER_CREATED);
2820
2821 /* Record the first bfd that needs the special sections. */
2822 if (!htab->elf.dynobj)
2823 htab->elf.dynobj = abfd;
2824
2825 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2826 lsect->name,
2827 flags);
2828 if (s == NULL
2829 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2830 return FALSE;
2831 lsect->section = s;
2832
2833 return create_sdata_sym (htab, lsect);
2834 }
2835
2836 /* Find a linker generated pointer with a given addend and type. */
2837
2838 static elf_linker_section_pointers_t *
2839 elf_find_pointer_linker_section
2840 (elf_linker_section_pointers_t *linker_pointers,
2841 bfd_vma addend,
2842 elf_linker_section_t *lsect)
2843 {
2844 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2845 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2846 return linker_pointers;
2847
2848 return NULL;
2849 }
2850
2851 /* Allocate a pointer to live in a linker created section. */
2852
2853 static bfd_boolean
2854 elf_create_pointer_linker_section (bfd *abfd,
2855 elf_linker_section_t *lsect,
2856 struct elf_link_hash_entry *h,
2857 const Elf_Internal_Rela *rel)
2858 {
2859 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2860 elf_linker_section_pointers_t *linker_section_ptr;
2861 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2862 bfd_size_type amt;
2863
2864 BFD_ASSERT (lsect != NULL);
2865
2866 /* Is this a global symbol? */
2867 if (h != NULL)
2868 {
2869 struct ppc_elf_link_hash_entry *eh;
2870
2871 /* Has this symbol already been allocated? If so, our work is done. */
2872 eh = (struct ppc_elf_link_hash_entry *) h;
2873 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2874 rel->r_addend,
2875 lsect))
2876 return TRUE;
2877
2878 ptr_linker_section_ptr = &eh->linker_section_pointer;
2879 }
2880 else
2881 {
2882 BFD_ASSERT (is_ppc_elf (abfd));
2883
2884 /* Allocation of a pointer to a local symbol. */
2885 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2886
2887 /* Allocate a table to hold the local symbols if first time. */
2888 if (!ptr)
2889 {
2890 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2891
2892 amt = num_symbols;
2893 amt *= sizeof (elf_linker_section_pointers_t *);
2894 ptr = bfd_zalloc (abfd, amt);
2895
2896 if (!ptr)
2897 return FALSE;
2898
2899 elf_local_ptr_offsets (abfd) = ptr;
2900 }
2901
2902 /* Has this symbol already been allocated? If so, our work is done. */
2903 if (elf_find_pointer_linker_section (ptr[r_symndx],
2904 rel->r_addend,
2905 lsect))
2906 return TRUE;
2907
2908 ptr_linker_section_ptr = &ptr[r_symndx];
2909 }
2910
2911 /* Allocate space for a pointer in the linker section, and allocate
2912 a new pointer record from internal memory. */
2913 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2914 amt = sizeof (elf_linker_section_pointers_t);
2915 linker_section_ptr = bfd_alloc (abfd, amt);
2916
2917 if (!linker_section_ptr)
2918 return FALSE;
2919
2920 linker_section_ptr->next = *ptr_linker_section_ptr;
2921 linker_section_ptr->addend = rel->r_addend;
2922 linker_section_ptr->lsect = lsect;
2923 *ptr_linker_section_ptr = linker_section_ptr;
2924
2925 linker_section_ptr->offset = lsect->section->size;
2926 lsect->section->size += 4;
2927
2928 #ifdef DEBUG
2929 fprintf (stderr,
2930 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2931 lsect->name, (long) linker_section_ptr->offset,
2932 (long) lsect->section->size);
2933 #endif
2934
2935 return TRUE;
2936 }
2937
2938 static bfd_boolean
2939 update_local_sym_info (bfd *abfd,
2940 Elf_Internal_Shdr *symtab_hdr,
2941 unsigned long r_symndx,
2942 int tls_type)
2943 {
2944 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2945 char *local_got_tls_masks;
2946
2947 if (local_got_refcounts == NULL)
2948 {
2949 bfd_size_type size = symtab_hdr->sh_info;
2950
2951 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2952 local_got_refcounts = bfd_zalloc (abfd, size);
2953 if (local_got_refcounts == NULL)
2954 return FALSE;
2955 elf_local_got_refcounts (abfd) = local_got_refcounts;
2956 }
2957
2958 local_got_refcounts[r_symndx] += 1;
2959 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2960 local_got_tls_masks[r_symndx] |= tls_type;
2961 return TRUE;
2962 }
2963
2964 static bfd_boolean
2965 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2966 asection *sec, bfd_vma addend)
2967 {
2968 struct plt_entry *ent;
2969
2970 if (addend < 32768)
2971 sec = NULL;
2972 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2973 if (ent->sec == sec && ent->addend == addend)
2974 break;
2975 if (ent == NULL)
2976 {
2977 bfd_size_type amt = sizeof (*ent);
2978 ent = bfd_alloc (abfd, amt);
2979 if (ent == NULL)
2980 return FALSE;
2981 ent->next = h->plt.plist;
2982 ent->sec = sec;
2983 ent->addend = addend;
2984 ent->plt.refcount = 0;
2985 h->plt.plist = ent;
2986 }
2987 ent->plt.refcount += 1;
2988 return TRUE;
2989 }
2990
2991 static struct plt_entry *
2992 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2993 {
2994 struct plt_entry *ent;
2995
2996 if (addend < 32768)
2997 sec = NULL;
2998 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2999 if (ent->sec == sec && ent->addend == addend)
3000 break;
3001 return ent;
3002 }
3003
3004 static void
3005 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3006 {
3007 (*_bfd_error_handler)
3008 (_("%B: relocation %s cannot be used when making a shared object"),
3009 abfd,
3010 ppc_elf_howto_table[r_type]->name);
3011 bfd_set_error (bfd_error_bad_value);
3012 }
3013
3014 /* Look through the relocs for a section during the first phase, and
3015 allocate space in the global offset table or procedure linkage
3016 table. */
3017
3018 static bfd_boolean
3019 ppc_elf_check_relocs (bfd *abfd,
3020 struct bfd_link_info *info,
3021 asection *sec,
3022 const Elf_Internal_Rela *relocs)
3023 {
3024 struct ppc_elf_link_hash_table *htab;
3025 Elf_Internal_Shdr *symtab_hdr;
3026 struct elf_link_hash_entry **sym_hashes;
3027 const Elf_Internal_Rela *rel;
3028 const Elf_Internal_Rela *rel_end;
3029 asection *got2, *sreloc;
3030
3031 if (info->relocatable)
3032 return TRUE;
3033
3034 /* Don't do anything special with non-loaded, non-alloced sections.
3035 In particular, any relocs in such sections should not affect GOT
3036 and PLT reference counting (ie. we don't allow them to create GOT
3037 or PLT entries), there's no possibility or desire to optimize TLS
3038 relocs, and there's not much point in propagating relocs to shared
3039 libs that the dynamic linker won't relocate. */
3040 if ((sec->flags & SEC_ALLOC) == 0)
3041 return TRUE;
3042
3043 #ifdef DEBUG
3044 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3045 sec, abfd);
3046 #endif
3047
3048 BFD_ASSERT (is_ppc_elf (abfd));
3049
3050 /* Initialize howto table if not already done. */
3051 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3052 ppc_elf_howto_init ();
3053
3054 htab = ppc_elf_hash_table (info);
3055 symtab_hdr = &elf_symtab_hdr (abfd);
3056 sym_hashes = elf_sym_hashes (abfd);
3057 got2 = bfd_get_section_by_name (abfd, ".got2");
3058 sreloc = NULL;
3059
3060 rel_end = relocs + sec->reloc_count;
3061 for (rel = relocs; rel < rel_end; rel++)
3062 {
3063 unsigned long r_symndx;
3064 enum elf_ppc_reloc_type r_type;
3065 struct elf_link_hash_entry *h;
3066 int tls_type = 0;
3067
3068 r_symndx = ELF32_R_SYM (rel->r_info);
3069 if (r_symndx < symtab_hdr->sh_info)
3070 h = NULL;
3071 else
3072 {
3073 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3074 while (h->root.type == bfd_link_hash_indirect
3075 || h->root.type == bfd_link_hash_warning)
3076 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3077 }
3078
3079 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3080 This shows up in particular in an R_PPC_ADDR32 in the eabi
3081 startup code. */
3082 if (h != NULL
3083 && htab->got == NULL
3084 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3085 {
3086 if (htab->elf.dynobj == NULL)
3087 htab->elf.dynobj = abfd;
3088 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3089 return FALSE;
3090 BFD_ASSERT (h == htab->elf.hgot);
3091 }
3092
3093 r_type = ELF32_R_TYPE (rel->r_info);
3094 switch (r_type)
3095 {
3096 case R_PPC_GOT_TLSLD16:
3097 case R_PPC_GOT_TLSLD16_LO:
3098 case R_PPC_GOT_TLSLD16_HI:
3099 case R_PPC_GOT_TLSLD16_HA:
3100 tls_type = TLS_TLS | TLS_LD;
3101 goto dogottls;
3102
3103 case R_PPC_GOT_TLSGD16:
3104 case R_PPC_GOT_TLSGD16_LO:
3105 case R_PPC_GOT_TLSGD16_HI:
3106 case R_PPC_GOT_TLSGD16_HA:
3107 tls_type = TLS_TLS | TLS_GD;
3108 goto dogottls;
3109
3110 case R_PPC_GOT_TPREL16:
3111 case R_PPC_GOT_TPREL16_LO:
3112 case R_PPC_GOT_TPREL16_HI:
3113 case R_PPC_GOT_TPREL16_HA:
3114 if (info->shared)
3115 info->flags |= DF_STATIC_TLS;
3116 tls_type = TLS_TLS | TLS_TPREL;
3117 goto dogottls;
3118
3119 case R_PPC_GOT_DTPREL16:
3120 case R_PPC_GOT_DTPREL16_LO:
3121 case R_PPC_GOT_DTPREL16_HI:
3122 case R_PPC_GOT_DTPREL16_HA:
3123 tls_type = TLS_TLS | TLS_DTPREL;
3124 dogottls:
3125 sec->has_tls_reloc = 1;
3126 /* Fall thru */
3127
3128 /* GOT16 relocations */
3129 case R_PPC_GOT16:
3130 case R_PPC_GOT16_LO:
3131 case R_PPC_GOT16_HI:
3132 case R_PPC_GOT16_HA:
3133 /* This symbol requires a global offset table entry. */
3134 if (htab->got == NULL)
3135 {
3136 if (htab->elf.dynobj == NULL)
3137 htab->elf.dynobj = abfd;
3138 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3139 return FALSE;
3140 }
3141 if (h != NULL)
3142 {
3143 h->got.refcount += 1;
3144 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3145 }
3146 else
3147 /* This is a global offset table entry for a local symbol. */
3148 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3149 return FALSE;
3150 break;
3151
3152 /* Indirect .sdata relocation. */
3153 case R_PPC_EMB_SDAI16:
3154 if (info->shared)
3155 {
3156 bad_shared_reloc (abfd, r_type);
3157 return FALSE;
3158 }
3159 if (htab->sdata[0].section == NULL
3160 && !ppc_elf_create_linker_section (abfd, info, 0,
3161 &htab->sdata[0]))
3162 return FALSE;
3163 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3164 h, rel))
3165 return FALSE;
3166 if (h != NULL)
3167 {
3168 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3169 h->non_got_ref = TRUE;
3170 }
3171 break;
3172
3173 /* Indirect .sdata2 relocation. */
3174 case R_PPC_EMB_SDA2I16:
3175 if (info->shared)
3176 {
3177 bad_shared_reloc (abfd, r_type);
3178 return FALSE;
3179 }
3180 if (htab->sdata[1].section == NULL
3181 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3182 &htab->sdata[1]))
3183 return FALSE;
3184 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3185 h, rel))
3186 return FALSE;
3187 if (h != NULL)
3188 {
3189 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3190 h->non_got_ref = TRUE;
3191 }
3192 break;
3193
3194 case R_PPC_SDAREL16:
3195 if (info->shared)
3196 {
3197 bad_shared_reloc (abfd, r_type);
3198 return FALSE;
3199 }
3200 if (htab->sdata[0].sym == NULL
3201 && !create_sdata_sym (htab, &htab->sdata[0]))
3202 return FALSE;
3203 if (h != NULL)
3204 {
3205 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3206 h->non_got_ref = TRUE;
3207 }
3208 break;
3209
3210 case R_PPC_EMB_SDA2REL:
3211 if (info->shared)
3212 {
3213 bad_shared_reloc (abfd, r_type);
3214 return FALSE;
3215 }
3216 if (htab->sdata[1].sym == NULL
3217 && !create_sdata_sym (htab, &htab->sdata[1]))
3218 return FALSE;
3219 if (h != NULL)
3220 {
3221 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3222 h->non_got_ref = TRUE;
3223 }
3224 break;
3225
3226 case R_PPC_EMB_SDA21:
3227 case R_PPC_EMB_RELSDA:
3228 if (info->shared)
3229 {
3230 bad_shared_reloc (abfd, r_type);
3231 return FALSE;
3232 }
3233 if (htab->sdata[0].sym == NULL
3234 && !create_sdata_sym (htab, &htab->sdata[0]))
3235 return FALSE;
3236 if (htab->sdata[1].sym == NULL
3237 && !create_sdata_sym (htab, &htab->sdata[1]))
3238 return FALSE;
3239 if (h != NULL)
3240 {
3241 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3242 h->non_got_ref = TRUE;
3243 }
3244 break;
3245
3246 case R_PPC_EMB_NADDR32:
3247 case R_PPC_EMB_NADDR16:
3248 case R_PPC_EMB_NADDR16_LO:
3249 case R_PPC_EMB_NADDR16_HI:
3250 case R_PPC_EMB_NADDR16_HA:
3251 if (info->shared)
3252 {
3253 bad_shared_reloc (abfd, r_type);
3254 return FALSE;
3255 }
3256 if (h != NULL)
3257 h->non_got_ref = TRUE;
3258 break;
3259
3260 case R_PPC_PLT32:
3261 case R_PPC_PLTREL24:
3262 case R_PPC_PLTREL32:
3263 case R_PPC_PLT16_LO:
3264 case R_PPC_PLT16_HI:
3265 case R_PPC_PLT16_HA:
3266 #ifdef DEBUG
3267 fprintf (stderr, "Reloc requires a PLT entry\n");
3268 #endif
3269 /* This symbol requires a procedure linkage table entry. We
3270 actually build the entry in finish_dynamic_symbol,
3271 because this might be a case of linking PIC code without
3272 linking in any dynamic objects, in which case we don't
3273 need to generate a procedure linkage table after all. */
3274
3275 if (h == NULL)
3276 {
3277 /* It does not make sense to have a procedure linkage
3278 table entry for a local symbol. */
3279 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3280 "local symbol"),
3281 abfd,
3282 sec,
3283 (long) rel->r_offset,
3284 ppc_elf_howto_table[r_type]->name);
3285 bfd_set_error (bfd_error_bad_value);
3286 return FALSE;
3287 }
3288 else
3289 {
3290 bfd_vma addend = 0;
3291
3292 if (r_type == R_PPC_PLTREL24)
3293 {
3294 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3295 addend = rel->r_addend;
3296 }
3297 h->needs_plt = 1;
3298 if (!update_plt_info (abfd, h, got2, addend))
3299 return FALSE;
3300 }
3301 break;
3302
3303 /* The following relocations don't need to propagate the
3304 relocation if linking a shared object since they are
3305 section relative. */
3306 case R_PPC_SECTOFF:
3307 case R_PPC_SECTOFF_LO:
3308 case R_PPC_SECTOFF_HI:
3309 case R_PPC_SECTOFF_HA:
3310 case R_PPC_DTPREL16:
3311 case R_PPC_DTPREL16_LO:
3312 case R_PPC_DTPREL16_HI:
3313 case R_PPC_DTPREL16_HA:
3314 case R_PPC_TOC16:
3315 break;
3316
3317 case R_PPC_REL16:
3318 case R_PPC_REL16_LO:
3319 case R_PPC_REL16_HI:
3320 case R_PPC_REL16_HA:
3321 ppc_elf_tdata (abfd)->has_rel16 = 1;
3322 break;
3323
3324 /* These are just markers. */
3325 case R_PPC_TLS:
3326 case R_PPC_EMB_MRKREF:
3327 case R_PPC_NONE:
3328 case R_PPC_max:
3329 break;
3330
3331 /* These should only appear in dynamic objects. */
3332 case R_PPC_COPY:
3333 case R_PPC_GLOB_DAT:
3334 case R_PPC_JMP_SLOT:
3335 case R_PPC_RELATIVE:
3336 break;
3337
3338 /* These aren't handled yet. We'll report an error later. */
3339 case R_PPC_ADDR30:
3340 case R_PPC_EMB_RELSEC16:
3341 case R_PPC_EMB_RELST_LO:
3342 case R_PPC_EMB_RELST_HI:
3343 case R_PPC_EMB_RELST_HA:
3344 case R_PPC_EMB_BIT_FLD:
3345 break;
3346
3347 /* This refers only to functions defined in the shared library. */
3348 case R_PPC_LOCAL24PC:
3349 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3350 {
3351 htab->plt_type = PLT_OLD;
3352 htab->old_bfd = abfd;
3353 }
3354 break;
3355
3356 /* This relocation describes the C++ object vtable hierarchy.
3357 Reconstruct it for later use during GC. */
3358 case R_PPC_GNU_VTINHERIT:
3359 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3360 return FALSE;
3361 break;
3362
3363 /* This relocation describes which C++ vtable entries are actually
3364 used. Record for later use during GC. */
3365 case R_PPC_GNU_VTENTRY:
3366 BFD_ASSERT (h != NULL);
3367 if (h != NULL
3368 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3369 return FALSE;
3370 break;
3371
3372 /* We shouldn't really be seeing these. */
3373 case R_PPC_TPREL32:
3374 if (info->shared)
3375 info->flags |= DF_STATIC_TLS;
3376 goto dodyn;
3377
3378 /* Nor these. */
3379 case R_PPC_DTPMOD32:
3380 case R_PPC_DTPREL32:
3381 goto dodyn;
3382
3383 case R_PPC_TPREL16:
3384 case R_PPC_TPREL16_LO:
3385 case R_PPC_TPREL16_HI:
3386 case R_PPC_TPREL16_HA:
3387 if (info->shared)
3388 info->flags |= DF_STATIC_TLS;
3389 goto dodyn;
3390
3391 case R_PPC_REL32:
3392 if (h == NULL
3393 && got2 != NULL
3394 && (sec->flags & SEC_CODE) != 0
3395 && (info->shared || info->pie)
3396 && htab->plt_type == PLT_UNSET)
3397 {
3398 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3399 the start of a function, which assembles to a REL32
3400 reference to .got2. If we detect one of these, then
3401 force the old PLT layout because the linker cannot
3402 reliably deduce the GOT pointer value needed for
3403 PLT call stubs. */
3404 asection *s;
3405
3406 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3407 r_symndx);
3408 if (s == got2)
3409 {
3410 htab->plt_type = PLT_OLD;
3411 htab->old_bfd = abfd;
3412 }
3413 }
3414 if (h == NULL || h == htab->elf.hgot)
3415 break;
3416 goto dodyn1;
3417
3418 case R_PPC_REL24:
3419 case R_PPC_REL14:
3420 case R_PPC_REL14_BRTAKEN:
3421 case R_PPC_REL14_BRNTAKEN:
3422 if (h == NULL)
3423 break;
3424 if (h == htab->elf.hgot)
3425 {
3426 if (htab->plt_type == PLT_UNSET)
3427 {
3428 htab->plt_type = PLT_OLD;
3429 htab->old_bfd = abfd;
3430 }
3431 break;
3432 }
3433 /* fall through */
3434
3435 case R_PPC_ADDR32:
3436 case R_PPC_ADDR24:
3437 case R_PPC_ADDR16:
3438 case R_PPC_ADDR16_LO:
3439 case R_PPC_ADDR16_HI:
3440 case R_PPC_ADDR16_HA:
3441 case R_PPC_ADDR14:
3442 case R_PPC_ADDR14_BRTAKEN:
3443 case R_PPC_ADDR14_BRNTAKEN:
3444 case R_PPC_UADDR32:
3445 case R_PPC_UADDR16:
3446 dodyn1:
3447 if (h != NULL && !info->shared)
3448 {
3449 /* We may need a plt entry if the symbol turns out to be
3450 a function defined in a dynamic object. */
3451 if (!update_plt_info (abfd, h, NULL, 0))
3452 return FALSE;
3453
3454 /* We may need a copy reloc too. */
3455 h->non_got_ref = 1;
3456 }
3457
3458 dodyn:
3459 /* If we are creating a shared library, and this is a reloc
3460 against a global symbol, or a non PC relative reloc
3461 against a local symbol, then we need to copy the reloc
3462 into the shared library. However, if we are linking with
3463 -Bsymbolic, we do not need to copy a reloc against a
3464 global symbol which is defined in an object we are
3465 including in the link (i.e., DEF_REGULAR is set). At
3466 this point we have not seen all the input files, so it is
3467 possible that DEF_REGULAR is not set now but will be set
3468 later (it is never cleared). In case of a weak definition,
3469 DEF_REGULAR may be cleared later by a strong definition in
3470 a shared library. We account for that possibility below by
3471 storing information in the dyn_relocs field of the hash
3472 table entry. A similar situation occurs when creating
3473 shared libraries and symbol visibility changes render the
3474 symbol local.
3475
3476 If on the other hand, we are creating an executable, we
3477 may need to keep relocations for symbols satisfied by a
3478 dynamic library if we manage to avoid copy relocs for the
3479 symbol. */
3480 if ((info->shared
3481 && (MUST_BE_DYN_RELOC (r_type)
3482 || (h != NULL
3483 && (! info->symbolic
3484 || h->root.type == bfd_link_hash_defweak
3485 || !h->def_regular))))
3486 || (ELIMINATE_COPY_RELOCS
3487 && !info->shared
3488 && h != NULL
3489 && (h->root.type == bfd_link_hash_defweak
3490 || !h->def_regular)))
3491 {
3492 struct ppc_elf_dyn_relocs *p;
3493 struct ppc_elf_dyn_relocs **head;
3494
3495 #ifdef DEBUG
3496 fprintf (stderr,
3497 "ppc_elf_check_relocs needs to "
3498 "create relocation for %s\n",
3499 (h && h->root.root.string
3500 ? h->root.root.string : "<unknown>"));
3501 #endif
3502 if (sreloc == NULL)
3503 {
3504 const char *name;
3505
3506 name = (bfd_elf_string_from_elf_section
3507 (abfd,
3508 elf_elfheader (abfd)->e_shstrndx,
3509 elf_section_data (sec)->rel_hdr.sh_name));
3510 if (name == NULL)
3511 return FALSE;
3512
3513 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3514 && strcmp (bfd_get_section_name (abfd, sec),
3515 name + 5) == 0);
3516
3517 if (htab->elf.dynobj == NULL)
3518 htab->elf.dynobj = abfd;
3519 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3520 if (sreloc == NULL)
3521 {
3522 flagword flags;
3523
3524 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3525 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3526 | SEC_ALLOC | SEC_LOAD);
3527 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3528 name,
3529 flags);
3530 if (sreloc == NULL
3531 || ! bfd_set_section_alignment (htab->elf.dynobj,
3532 sreloc, 2))
3533 return FALSE;
3534 }
3535 elf_section_data (sec)->sreloc = sreloc;
3536 }
3537
3538 /* If this is a global symbol, we count the number of
3539 relocations we need for this symbol. */
3540 if (h != NULL)
3541 {
3542 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3543 }
3544 else
3545 {
3546 /* Track dynamic relocs needed for local syms too.
3547 We really need local syms available to do this
3548 easily. Oh well. */
3549
3550 asection *s;
3551 void *vpp;
3552
3553 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3554 sec, r_symndx);
3555 if (s == NULL)
3556 return FALSE;
3557
3558 vpp = &elf_section_data (s)->local_dynrel;
3559 head = (struct ppc_elf_dyn_relocs **) vpp;
3560 }
3561
3562 p = *head;
3563 if (p == NULL || p->sec != sec)
3564 {
3565 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3566 if (p == NULL)
3567 return FALSE;
3568 p->next = *head;
3569 *head = p;
3570 p->sec = sec;
3571 p->count = 0;
3572 p->pc_count = 0;
3573 }
3574
3575 p->count += 1;
3576 if (!MUST_BE_DYN_RELOC (r_type))
3577 p->pc_count += 1;
3578 }
3579
3580 break;
3581 }
3582 }
3583
3584 return TRUE;
3585 }
3586 \f
3587
3588 /* Merge object attributes from IBFD into OBFD. Raise an error if
3589 there are conflicting attributes. */
3590 static bfd_boolean
3591 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3592 {
3593 obj_attribute *in_attr, *in_attrs;
3594 obj_attribute *out_attr, *out_attrs;
3595
3596 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3597 {
3598 /* This is the first object. Copy the attributes. */
3599 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3600
3601 /* Use the Tag_null value to indicate the attributes have been
3602 initialized. */
3603 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3604
3605 return TRUE;
3606 }
3607
3608 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3609 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3610
3611 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3612 non-conflicting ones. */
3613 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3614 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3615 if (in_attr->i != out_attr->i)
3616 {
3617 out_attr->type = 1;
3618 if (out_attr->i == 0)
3619 out_attr->i = in_attr->i;
3620 else if (in_attr->i == 0)
3621 ;
3622 else if (out_attr->i == 1 && in_attr->i == 2)
3623 _bfd_error_handler
3624 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3625 else if (out_attr->i == 2 && in_attr->i == 1)
3626 _bfd_error_handler
3627 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3628 else if (in_attr->i > 2)
3629 _bfd_error_handler
3630 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3631 in_attr->i);
3632 else
3633 _bfd_error_handler
3634 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3635 out_attr->i);
3636 }
3637
3638 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3639 merge non-conflicting ones. */
3640 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3641 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3642 if (in_attr->i != out_attr->i)
3643 {
3644 const char *in_abi = NULL, *out_abi = NULL;
3645
3646 switch (in_attr->i)
3647 {
3648 case 1: in_abi = "generic"; break;
3649 case 2: in_abi = "AltiVec"; break;
3650 case 3: in_abi = "SPE"; break;
3651 }
3652
3653 switch (out_attr->i)
3654 {
3655 case 1: out_abi = "generic"; break;
3656 case 2: out_abi = "AltiVec"; break;
3657 case 3: out_abi = "SPE"; break;
3658 }
3659
3660 out_attr->type = 1;
3661 if (out_attr->i == 0)
3662 out_attr->i = in_attr->i;
3663 else if (in_attr->i == 0)
3664 ;
3665 /* For now, allow generic to transition to AltiVec or SPE
3666 without a warning. If GCC marked files with their stack
3667 alignment and used don't-care markings for files which are
3668 not affected by the vector ABI, we could warn about this
3669 case too. */
3670 else if (out_attr->i == 1)
3671 out_attr->i = in_attr->i;
3672 else if (in_attr->i == 1)
3673 ;
3674 else if (in_abi == NULL)
3675 _bfd_error_handler
3676 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3677 in_attr->i);
3678 else if (out_abi == NULL)
3679 _bfd_error_handler
3680 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3681 in_attr->i);
3682 else
3683 _bfd_error_handler
3684 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3685 ibfd, obfd, in_abi, out_abi);
3686 }
3687
3688 /* Merge Tag_compatibility attributes and any common GNU ones. */
3689 _bfd_elf_merge_object_attributes (ibfd, obfd);
3690
3691 return TRUE;
3692 }
3693
3694 /* Merge backend specific data from an object file to the output
3695 object file when linking. */
3696
3697 static bfd_boolean
3698 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3699 {
3700 flagword old_flags;
3701 flagword new_flags;
3702 bfd_boolean error;
3703
3704 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3705 return TRUE;
3706
3707 /* Check if we have the same endianess. */
3708 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3709 return FALSE;
3710
3711 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3712 return FALSE;
3713
3714 new_flags = elf_elfheader (ibfd)->e_flags;
3715 old_flags = elf_elfheader (obfd)->e_flags;
3716 if (!elf_flags_init (obfd))
3717 {
3718 /* First call, no flags set. */
3719 elf_flags_init (obfd) = TRUE;
3720 elf_elfheader (obfd)->e_flags = new_flags;
3721 }
3722
3723 /* Compatible flags are ok. */
3724 else if (new_flags == old_flags)
3725 ;
3726
3727 /* Incompatible flags. */
3728 else
3729 {
3730 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3731 to be linked with either. */
3732 error = FALSE;
3733 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3734 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3735 {
3736 error = TRUE;
3737 (*_bfd_error_handler)
3738 (_("%B: compiled with -mrelocatable and linked with "
3739 "modules compiled normally"), ibfd);
3740 }
3741 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3742 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3743 {
3744 error = TRUE;
3745 (*_bfd_error_handler)
3746 (_("%B: compiled normally and linked with "
3747 "modules compiled with -mrelocatable"), ibfd);
3748 }
3749
3750 /* The output is -mrelocatable-lib iff both the input files are. */
3751 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3752 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3753
3754 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3755 but each input file is either -mrelocatable or -mrelocatable-lib. */
3756 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3757 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3758 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3759 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3760
3761 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3762 any module uses it. */
3763 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3764
3765 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3766 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3767
3768 /* Warn about any other mismatches. */
3769 if (new_flags != old_flags)
3770 {
3771 error = TRUE;
3772 (*_bfd_error_handler)
3773 (_("%B: uses different e_flags (0x%lx) fields "
3774 "than previous modules (0x%lx)"),
3775 ibfd, (long) new_flags, (long) old_flags);
3776 }
3777
3778 if (error)
3779 {
3780 bfd_set_error (bfd_error_bad_value);
3781 return FALSE;
3782 }
3783 }
3784
3785 return TRUE;
3786 }
3787 \f
3788 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3789 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3790 int
3791 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3792 struct bfd_link_info *info,
3793 enum ppc_elf_plt_type plt_style,
3794 int emit_stub_syms)
3795 {
3796 struct ppc_elf_link_hash_table *htab;
3797 flagword flags;
3798
3799 htab = ppc_elf_hash_table (info);
3800
3801 if (htab->plt_type == PLT_UNSET)
3802 {
3803 if (plt_style == PLT_OLD)
3804 htab->plt_type = PLT_OLD;
3805 else
3806 {
3807 bfd *ibfd;
3808 enum ppc_elf_plt_type plt_type = plt_style;
3809
3810 /* Look through the reloc flags left by ppc_elf_check_relocs.
3811 Use the old style bss plt if a file makes plt calls
3812 without using the new relocs, and if ld isn't given
3813 --secure-plt and we never see REL16 relocs. */
3814 if (plt_type == PLT_UNSET)
3815 plt_type = PLT_OLD;
3816 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3817 if (is_ppc_elf (ibfd))
3818 {
3819 if (ppc_elf_tdata (ibfd)->has_rel16)
3820 plt_type = PLT_NEW;
3821 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3822 {
3823 plt_type = PLT_OLD;
3824 htab->old_bfd = ibfd;
3825 break;
3826 }
3827 }
3828 htab->plt_type = plt_type;
3829 }
3830 }
3831 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3832 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3833
3834 htab->emit_stub_syms = emit_stub_syms;
3835
3836 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3837
3838 if (htab->plt_type == PLT_NEW)
3839 {
3840 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3841 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3842
3843 /* The new PLT is a loaded section. */
3844 if (htab->plt != NULL
3845 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3846 return -1;
3847
3848 /* The new GOT is not executable. */
3849 if (htab->got != NULL
3850 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3851 return -1;
3852 }
3853 else
3854 {
3855 /* Stop an unused .glink section from affecting .text alignment. */
3856 if (htab->glink != NULL
3857 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3858 return -1;
3859 }
3860 return htab->plt_type == PLT_NEW;
3861 }
3862 \f
3863 /* Return the section that should be marked against GC for a given
3864 relocation. */
3865
3866 static asection *
3867 ppc_elf_gc_mark_hook (asection *sec,
3868 struct bfd_link_info *info,
3869 Elf_Internal_Rela *rel,
3870 struct elf_link_hash_entry *h,
3871 Elf_Internal_Sym *sym)
3872 {
3873 if (h != NULL)
3874 switch (ELF32_R_TYPE (rel->r_info))
3875 {
3876 case R_PPC_GNU_VTINHERIT:
3877 case R_PPC_GNU_VTENTRY:
3878 return NULL;
3879 }
3880
3881 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3882 }
3883
3884 /* Update the got, plt and dynamic reloc reference counts for the
3885 section being removed. */
3886
3887 static bfd_boolean
3888 ppc_elf_gc_sweep_hook (bfd *abfd,
3889 struct bfd_link_info *info,
3890 asection *sec,
3891 const Elf_Internal_Rela *relocs)
3892 {
3893 struct ppc_elf_link_hash_table *htab;
3894 Elf_Internal_Shdr *symtab_hdr;
3895 struct elf_link_hash_entry **sym_hashes;
3896 bfd_signed_vma *local_got_refcounts;
3897 const Elf_Internal_Rela *rel, *relend;
3898 asection *got2;
3899
3900 if (info->relocatable)
3901 return TRUE;
3902
3903 if ((sec->flags & SEC_ALLOC) == 0)
3904 return TRUE;
3905
3906 elf_section_data (sec)->local_dynrel = NULL;
3907
3908 htab = ppc_elf_hash_table (info);
3909 symtab_hdr = &elf_symtab_hdr (abfd);
3910 sym_hashes = elf_sym_hashes (abfd);
3911 local_got_refcounts = elf_local_got_refcounts (abfd);
3912 got2 = bfd_get_section_by_name (abfd, ".got2");
3913
3914 relend = relocs + sec->reloc_count;
3915 for (rel = relocs; rel < relend; rel++)
3916 {
3917 unsigned long r_symndx;
3918 enum elf_ppc_reloc_type r_type;
3919 struct elf_link_hash_entry *h = NULL;
3920
3921 r_symndx = ELF32_R_SYM (rel->r_info);
3922 if (r_symndx >= symtab_hdr->sh_info)
3923 {
3924 struct ppc_elf_dyn_relocs **pp, *p;
3925 struct ppc_elf_link_hash_entry *eh;
3926
3927 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3928 while (h->root.type == bfd_link_hash_indirect
3929 || h->root.type == bfd_link_hash_warning)
3930 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3931 eh = (struct ppc_elf_link_hash_entry *) h;
3932
3933 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3934 if (p->sec == sec)
3935 {
3936 /* Everything must go for SEC. */
3937 *pp = p->next;
3938 break;
3939 }
3940 }
3941
3942 r_type = ELF32_R_TYPE (rel->r_info);
3943 switch (r_type)
3944 {
3945 case R_PPC_GOT_TLSLD16:
3946 case R_PPC_GOT_TLSLD16_LO:
3947 case R_PPC_GOT_TLSLD16_HI:
3948 case R_PPC_GOT_TLSLD16_HA:
3949 case R_PPC_GOT_TLSGD16:
3950 case R_PPC_GOT_TLSGD16_LO:
3951 case R_PPC_GOT_TLSGD16_HI:
3952 case R_PPC_GOT_TLSGD16_HA:
3953 case R_PPC_GOT_TPREL16:
3954 case R_PPC_GOT_TPREL16_LO:
3955 case R_PPC_GOT_TPREL16_HI:
3956 case R_PPC_GOT_TPREL16_HA:
3957 case R_PPC_GOT_DTPREL16:
3958 case R_PPC_GOT_DTPREL16_LO:
3959 case R_PPC_GOT_DTPREL16_HI:
3960 case R_PPC_GOT_DTPREL16_HA:
3961 case R_PPC_GOT16:
3962 case R_PPC_GOT16_LO:
3963 case R_PPC_GOT16_HI:
3964 case R_PPC_GOT16_HA:
3965 if (h != NULL)
3966 {
3967 if (h->got.refcount > 0)
3968 h->got.refcount--;
3969 }
3970 else if (local_got_refcounts != NULL)
3971 {
3972 if (local_got_refcounts[r_symndx] > 0)
3973 local_got_refcounts[r_symndx]--;
3974 }
3975 break;
3976
3977 case R_PPC_REL24:
3978 case R_PPC_REL14:
3979 case R_PPC_REL14_BRTAKEN:
3980 case R_PPC_REL14_BRNTAKEN:
3981 case R_PPC_REL32:
3982 if (h == NULL || h == htab->elf.hgot)
3983 break;
3984 /* Fall thru */
3985
3986 case R_PPC_ADDR32:
3987 case R_PPC_ADDR24:
3988 case R_PPC_ADDR16:
3989 case R_PPC_ADDR16_LO:
3990 case R_PPC_ADDR16_HI:
3991 case R_PPC_ADDR16_HA:
3992 case R_PPC_ADDR14:
3993 case R_PPC_ADDR14_BRTAKEN:
3994 case R_PPC_ADDR14_BRNTAKEN:
3995 case R_PPC_UADDR32:
3996 case R_PPC_UADDR16:
3997 if (info->shared)
3998 break;
3999
4000 case R_PPC_PLT32:
4001 case R_PPC_PLTREL24:
4002 case R_PPC_PLTREL32:
4003 case R_PPC_PLT16_LO:
4004 case R_PPC_PLT16_HI:
4005 case R_PPC_PLT16_HA:
4006 if (h != NULL)
4007 {
4008 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4009 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4010 if (ent->plt.refcount > 0)
4011 ent->plt.refcount -= 1;
4012 }
4013 break;
4014
4015 default:
4016 break;
4017 }
4018 }
4019 return TRUE;
4020 }
4021 \f
4022 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4023
4024 asection *
4025 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4026 {
4027 struct ppc_elf_link_hash_table *htab;
4028
4029 htab = ppc_elf_hash_table (info);
4030 if (htab->plt_type == PLT_NEW
4031 && htab->plt != NULL
4032 && htab->plt->output_section != NULL)
4033 {
4034 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4035 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4036 }
4037
4038 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4039 FALSE, FALSE, TRUE);
4040 return _bfd_elf_tls_setup (obfd, info);
4041 }
4042
4043 /* Run through all the TLS relocs looking for optimization
4044 opportunities. */
4045
4046 bfd_boolean
4047 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4048 struct bfd_link_info *info)
4049 {
4050 bfd *ibfd;
4051 asection *sec;
4052 struct ppc_elf_link_hash_table *htab;
4053 int pass;
4054
4055 if (info->relocatable || info->shared)
4056 return TRUE;
4057
4058 htab = ppc_elf_hash_table (info);
4059 /* Make two passes through the relocs. First time check that tls
4060 relocs involved in setting up a tls_get_addr call are indeed
4061 followed by such a call. If they are not, exclude them from
4062 the optimizations done on the second pass. */
4063 for (pass = 0; pass < 2; ++pass)
4064 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4065 {
4066 Elf_Internal_Sym *locsyms = NULL;
4067 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4068
4069 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4070 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4071 {
4072 Elf_Internal_Rela *relstart, *rel, *relend;
4073
4074 /* Read the relocations. */
4075 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4076 info->keep_memory);
4077 if (relstart == NULL)
4078 return FALSE;
4079
4080 relend = relstart + sec->reloc_count;
4081 for (rel = relstart; rel < relend; rel++)
4082 {
4083 enum elf_ppc_reloc_type r_type;
4084 unsigned long r_symndx;
4085 struct elf_link_hash_entry *h = NULL;
4086 char *tls_mask;
4087 char tls_set, tls_clear;
4088 bfd_boolean is_local;
4089 int expecting_tls_get_addr;
4090 bfd_signed_vma *got_count;
4091
4092 r_symndx = ELF32_R_SYM (rel->r_info);
4093 if (r_symndx >= symtab_hdr->sh_info)
4094 {
4095 struct elf_link_hash_entry **sym_hashes;
4096
4097 sym_hashes = elf_sym_hashes (ibfd);
4098 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4099 while (h->root.type == bfd_link_hash_indirect
4100 || h->root.type == bfd_link_hash_warning)
4101 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4102 }
4103
4104 expecting_tls_get_addr = 0;
4105 is_local = FALSE;
4106 if (h == NULL
4107 || !h->def_dynamic)
4108 is_local = TRUE;
4109
4110 r_type = ELF32_R_TYPE (rel->r_info);
4111 switch (r_type)
4112 {
4113 case R_PPC_GOT_TLSLD16:
4114 case R_PPC_GOT_TLSLD16_LO:
4115 expecting_tls_get_addr = 1;
4116 /* Fall thru */
4117
4118 case R_PPC_GOT_TLSLD16_HI:
4119 case R_PPC_GOT_TLSLD16_HA:
4120 /* These relocs should never be against a symbol
4121 defined in a shared lib. Leave them alone if
4122 that turns out to be the case. */
4123 if (!is_local)
4124 continue;
4125
4126 /* LD -> LE */
4127 tls_set = 0;
4128 tls_clear = TLS_LD;
4129 break;
4130
4131 case R_PPC_GOT_TLSGD16:
4132 case R_PPC_GOT_TLSGD16_LO:
4133 expecting_tls_get_addr = 1;
4134 /* Fall thru */
4135
4136 case R_PPC_GOT_TLSGD16_HI:
4137 case R_PPC_GOT_TLSGD16_HA:
4138 if (is_local)
4139 /* GD -> LE */
4140 tls_set = 0;
4141 else
4142 /* GD -> IE */
4143 tls_set = TLS_TLS | TLS_TPRELGD;
4144 tls_clear = TLS_GD;
4145 break;
4146
4147 case R_PPC_GOT_TPREL16:
4148 case R_PPC_GOT_TPREL16_LO:
4149 case R_PPC_GOT_TPREL16_HI:
4150 case R_PPC_GOT_TPREL16_HA:
4151 if (is_local)
4152 {
4153 /* IE -> LE */
4154 tls_set = 0;
4155 tls_clear = TLS_TPREL;
4156 break;
4157 }
4158 else
4159 continue;
4160
4161 default:
4162 continue;
4163 }
4164
4165 if (pass == 0)
4166 {
4167 if (!expecting_tls_get_addr)
4168 continue;
4169
4170 if (rel + 1 < relend)
4171 {
4172 enum elf_ppc_reloc_type r_type2;
4173 unsigned long r_symndx2;
4174 struct elf_link_hash_entry *h2;
4175
4176 /* The next instruction should be a call to
4177 __tls_get_addr. Peek at the reloc to be sure. */
4178 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4179 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4180 if (r_symndx2 >= symtab_hdr->sh_info
4181 && (r_type2 == R_PPC_REL14
4182 || r_type2 == R_PPC_REL14_BRTAKEN
4183 || r_type2 == R_PPC_REL14_BRNTAKEN
4184 || r_type2 == R_PPC_REL24
4185 || r_type2 == R_PPC_PLTREL24))
4186 {
4187 struct elf_link_hash_entry **sym_hashes;
4188
4189 sym_hashes = elf_sym_hashes (ibfd);
4190 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4191 while (h2->root.type == bfd_link_hash_indirect
4192 || h2->root.type == bfd_link_hash_warning)
4193 h2 = ((struct elf_link_hash_entry *)
4194 h2->root.u.i.link);
4195 if (h2 == htab->tls_get_addr)
4196 continue;
4197 }
4198 }
4199
4200 /* Uh oh, we didn't find the expected call. We
4201 could just mark this symbol to exclude it
4202 from tls optimization but it's safer to skip
4203 the entire section. */
4204 sec->has_tls_reloc = 0;
4205 break;
4206 }
4207
4208 if (h != NULL)
4209 {
4210 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4211 got_count = &h->got.refcount;
4212 }
4213 else
4214 {
4215 Elf_Internal_Sym *sym;
4216 bfd_signed_vma *lgot_refs;
4217 char *lgot_masks;
4218
4219 if (locsyms == NULL)
4220 {
4221 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4222 if (locsyms == NULL)
4223 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4224 symtab_hdr->sh_info,
4225 0, NULL, NULL, NULL);
4226 if (locsyms == NULL)
4227 {
4228 if (elf_section_data (sec)->relocs != relstart)
4229 free (relstart);
4230 return FALSE;
4231 }
4232 }
4233 sym = locsyms + r_symndx;
4234 lgot_refs = elf_local_got_refcounts (ibfd);
4235 if (lgot_refs == NULL)
4236 abort ();
4237 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4238 tls_mask = &lgot_masks[r_symndx];
4239 got_count = &lgot_refs[r_symndx];
4240 }
4241
4242 if (tls_set == 0)
4243 {
4244 /* We managed to get rid of a got entry. */
4245 if (*got_count > 0)
4246 *got_count -= 1;
4247 }
4248
4249 if (expecting_tls_get_addr)
4250 {
4251 struct plt_entry *ent;
4252
4253 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4254 if (ent != NULL && ent->plt.refcount > 0)
4255 ent->plt.refcount -= 1;
4256 }
4257
4258 *tls_mask |= tls_set;
4259 *tls_mask &= ~tls_clear;
4260 }
4261
4262 if (elf_section_data (sec)->relocs != relstart)
4263 free (relstart);
4264 }
4265
4266 if (locsyms != NULL
4267 && (symtab_hdr->contents != (unsigned char *) locsyms))
4268 {
4269 if (!info->keep_memory)
4270 free (locsyms);
4271 else
4272 symtab_hdr->contents = (unsigned char *) locsyms;
4273 }
4274 }
4275 return TRUE;
4276 }
4277 \f
4278 /* Adjust a symbol defined by a dynamic object and referenced by a
4279 regular object. The current definition is in some section of the
4280 dynamic object, but we're not including those sections. We have to
4281 change the definition to something the rest of the link can
4282 understand. */
4283
4284 static bfd_boolean
4285 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4286 struct elf_link_hash_entry *h)
4287 {
4288 struct ppc_elf_link_hash_table *htab;
4289 asection *s;
4290
4291 #ifdef DEBUG
4292 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4293 h->root.root.string);
4294 #endif
4295
4296 /* Make sure we know what is going on here. */
4297 htab = ppc_elf_hash_table (info);
4298 BFD_ASSERT (htab->elf.dynobj != NULL
4299 && (h->needs_plt
4300 || h->u.weakdef != NULL
4301 || (h->def_dynamic
4302 && h->ref_regular
4303 && !h->def_regular)));
4304
4305 /* Deal with function syms. */
4306 if (h->type == STT_FUNC
4307 || h->needs_plt)
4308 {
4309 /* Clear procedure linkage table information for any symbol that
4310 won't need a .plt entry. */
4311 struct plt_entry *ent;
4312 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4313 if (ent->plt.refcount > 0)
4314 break;
4315 if (ent == NULL
4316 || SYMBOL_CALLS_LOCAL (info, h)
4317 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4318 && h->root.type == bfd_link_hash_undefweak))
4319 {
4320 /* A PLT entry is not required/allowed when:
4321
4322 1. We are not using ld.so; because then the PLT entry
4323 can't be set up, so we can't use one. In this case,
4324 ppc_elf_adjust_dynamic_symbol won't even be called.
4325
4326 2. GC has rendered the entry unused.
4327
4328 3. We know for certain that a call to this symbol
4329 will go to this object, or will remain undefined. */
4330 h->plt.plist = NULL;
4331 h->needs_plt = 0;
4332 }
4333 return TRUE;
4334 }
4335 else
4336 h->plt.plist = NULL;
4337
4338 /* If this is a weak symbol, and there is a real definition, the
4339 processor independent code will have arranged for us to see the
4340 real definition first, and we can just use the same value. */
4341 if (h->u.weakdef != NULL)
4342 {
4343 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4344 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4345 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4346 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4347 if (ELIMINATE_COPY_RELOCS)
4348 h->non_got_ref = h->u.weakdef->non_got_ref;
4349 return TRUE;
4350 }
4351
4352 /* This is a reference to a symbol defined by a dynamic object which
4353 is not a function. */
4354
4355 /* If we are creating a shared library, we must presume that the
4356 only references to the symbol are via the global offset table.
4357 For such cases we need not do anything here; the relocations will
4358 be handled correctly by relocate_section. */
4359 if (info->shared)
4360 return TRUE;
4361
4362 /* If there are no references to this symbol that do not use the
4363 GOT, we don't need to generate a copy reloc. */
4364 if (!h->non_got_ref)
4365 return TRUE;
4366
4367 /* If we didn't find any dynamic relocs in read-only sections, then
4368 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4369 We can't do this if there are any small data relocations. This
4370 doesn't work on VxWorks, where we can not have dynamic
4371 relocations (other than copy and jump slot relocations) in an
4372 executable. */
4373 if (ELIMINATE_COPY_RELOCS
4374 && !ppc_elf_hash_entry (h)->has_sda_refs
4375 && !htab->is_vxworks)
4376 {
4377 struct ppc_elf_dyn_relocs *p;
4378 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4379 {
4380 s = p->sec->output_section;
4381 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4382 break;
4383 }
4384
4385 if (p == NULL)
4386 {
4387 h->non_got_ref = 0;
4388 return TRUE;
4389 }
4390 }
4391
4392 if (h->size == 0)
4393 {
4394 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4395 h->root.root.string);
4396 return TRUE;
4397 }
4398
4399 /* We must allocate the symbol in our .dynbss section, which will
4400 become part of the .bss section of the executable. There will be
4401 an entry for this symbol in the .dynsym section. The dynamic
4402 object will contain position independent code, so all references
4403 from the dynamic object to this symbol will go through the global
4404 offset table. The dynamic linker will use the .dynsym entry to
4405 determine the address it must put in the global offset table, so
4406 both the dynamic object and the regular object will refer to the
4407 same memory location for the variable.
4408
4409 Of course, if the symbol is referenced using SDAREL relocs, we
4410 must instead allocate it in .sbss. */
4411
4412 if (ppc_elf_hash_entry (h)->has_sda_refs)
4413 s = htab->dynsbss;
4414 else
4415 s = htab->dynbss;
4416 BFD_ASSERT (s != NULL);
4417
4418 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4419 copy the initial value out of the dynamic object and into the
4420 runtime process image. We need to remember the offset into the
4421 .rela.bss section we are going to use. */
4422 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4423 {
4424 asection *srel;
4425
4426 if (ppc_elf_hash_entry (h)->has_sda_refs)
4427 srel = htab->relsbss;
4428 else
4429 srel = htab->relbss;
4430 BFD_ASSERT (srel != NULL);
4431 srel->size += sizeof (Elf32_External_Rela);
4432 h->needs_copy = 1;
4433 }
4434
4435 return _bfd_elf_adjust_dynamic_copy (h, s);
4436 }
4437 \f
4438 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4439 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4440 specifying the addend on the plt relocation. For -fpic code, the sym
4441 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4442 xxxxxxxx.got2.plt_pic32.<callee>. */
4443
4444 static bfd_boolean
4445 add_stub_sym (struct plt_entry *ent,
4446 struct elf_link_hash_entry *h,
4447 struct bfd_link_info *info)
4448 {
4449 struct elf_link_hash_entry *sh;
4450 size_t len1, len2, len3;
4451 char *name;
4452 const char *stub;
4453 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4454
4455 if (info->shared || info->pie)
4456 stub = ".plt_pic32.";
4457 else
4458 stub = ".plt_call32.";
4459
4460 len1 = strlen (h->root.root.string);
4461 len2 = strlen (stub);
4462 len3 = 0;
4463 if (ent->sec)
4464 len3 = strlen (ent->sec->name);
4465 name = bfd_malloc (len1 + len2 + len3 + 9);
4466 if (name == NULL)
4467 return FALSE;
4468 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4469 if (ent->sec)
4470 memcpy (name + 8, ent->sec->name, len3);
4471 memcpy (name + 8 + len3, stub, len2);
4472 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4473 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4474 if (sh == NULL)
4475 return FALSE;
4476 if (sh->root.type == bfd_link_hash_new)
4477 {
4478 sh->root.type = bfd_link_hash_defined;
4479 sh->root.u.def.section = htab->glink;
4480 sh->root.u.def.value = ent->glink_offset;
4481 sh->ref_regular = 1;
4482 sh->def_regular = 1;
4483 sh->ref_regular_nonweak = 1;
4484 sh->forced_local = 1;
4485 sh->non_elf = 0;
4486 }
4487 return TRUE;
4488 }
4489
4490 /* Allocate NEED contiguous space in .got, and return the offset.
4491 Handles allocation of the got header when crossing 32k. */
4492
4493 static bfd_vma
4494 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4495 {
4496 bfd_vma where;
4497 unsigned int max_before_header;
4498
4499 if (htab->plt_type == PLT_VXWORKS)
4500 {
4501 where = htab->got->size;
4502 htab->got->size += need;
4503 }
4504 else
4505 {
4506 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4507 if (need <= htab->got_gap)
4508 {
4509 where = max_before_header - htab->got_gap;
4510 htab->got_gap -= need;
4511 }
4512 else
4513 {
4514 if (htab->got->size + need > max_before_header
4515 && htab->got->size <= max_before_header)
4516 {
4517 htab->got_gap = max_before_header - htab->got->size;
4518 htab->got->size = max_before_header + htab->got_header_size;
4519 }
4520 where = htab->got->size;
4521 htab->got->size += need;
4522 }
4523 }
4524 return where;
4525 }
4526
4527 /* Allocate space in associated reloc sections for dynamic relocs. */
4528
4529 static bfd_boolean
4530 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4531 {
4532 struct bfd_link_info *info = inf;
4533 struct ppc_elf_link_hash_entry *eh;
4534 struct ppc_elf_link_hash_table *htab;
4535 struct ppc_elf_dyn_relocs *p;
4536
4537 if (h->root.type == bfd_link_hash_indirect)
4538 return TRUE;
4539
4540 if (h->root.type == bfd_link_hash_warning)
4541 /* When warning symbols are created, they **replace** the "real"
4542 entry in the hash table, thus we never get to see the real
4543 symbol in a hash traversal. So look at it now. */
4544 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4545
4546 htab = ppc_elf_hash_table (info);
4547 if (htab->elf.dynamic_sections_created)
4548 {
4549 struct plt_entry *ent;
4550 bfd_boolean doneone = FALSE;
4551 bfd_vma plt_offset = 0, glink_offset = 0;
4552
4553 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4554 if (ent->plt.refcount > 0)
4555 {
4556 /* Make sure this symbol is output as a dynamic symbol. */
4557 if (h->dynindx == -1
4558 && !h->forced_local)
4559 {
4560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4561 return FALSE;
4562 }
4563
4564 if (info->shared
4565 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4566 {
4567 asection *s = htab->plt;
4568
4569 if (htab->plt_type == PLT_NEW)
4570 {
4571 if (!doneone)
4572 {
4573 plt_offset = s->size;
4574 s->size += 4;
4575 }
4576 ent->plt.offset = plt_offset;
4577
4578 s = htab->glink;
4579 if (!doneone || info->shared || info->pie)
4580 {
4581 glink_offset = s->size;
4582 s->size += GLINK_ENTRY_SIZE;
4583 }
4584 if (!doneone
4585 && !info->shared
4586 && !h->def_regular)
4587 {
4588 h->root.u.def.section = s;
4589 h->root.u.def.value = glink_offset;
4590 }
4591 ent->glink_offset = glink_offset;
4592
4593 if (htab->emit_stub_syms
4594 && !add_stub_sym (ent, h, info))
4595 return FALSE;
4596 }
4597 else
4598 {
4599 if (!doneone)
4600 {
4601 /* If this is the first .plt entry, make room
4602 for the special first entry. */
4603 if (s->size == 0)
4604 s->size += htab->plt_initial_entry_size;
4605
4606 /* The PowerPC PLT is actually composed of two
4607 parts, the first part is 2 words (for a load
4608 and a jump), and then there is a remaining
4609 word available at the end. */
4610 plt_offset = (htab->plt_initial_entry_size
4611 + (htab->plt_slot_size
4612 * ((s->size
4613 - htab->plt_initial_entry_size)
4614 / htab->plt_entry_size)));
4615
4616 /* If this symbol is not defined in a regular
4617 file, and we are not generating a shared
4618 library, then set the symbol to this location
4619 in the .plt. This is required to make
4620 function pointers compare as equal between
4621 the normal executable and the shared library. */
4622 if (! info->shared
4623 && !h->def_regular)
4624 {
4625 h->root.u.def.section = s;
4626 h->root.u.def.value = plt_offset;
4627 }
4628
4629 /* Make room for this entry. */
4630 s->size += htab->plt_entry_size;
4631 /* After the 8192nd entry, room for two entries
4632 is allocated. */
4633 if (htab->plt_type == PLT_OLD
4634 && (s->size - htab->plt_initial_entry_size)
4635 / htab->plt_entry_size
4636 > PLT_NUM_SINGLE_ENTRIES)
4637 s->size += htab->plt_entry_size;
4638 }
4639 ent->plt.offset = plt_offset;
4640 }
4641
4642 /* We also need to make an entry in the .rela.plt section. */
4643 if (!doneone)
4644 {
4645 htab->relplt->size += sizeof (Elf32_External_Rela);
4646
4647 if (htab->plt_type == PLT_VXWORKS)
4648 {
4649 /* Allocate space for the unloaded relocations. */
4650 if (!info->shared)
4651 {
4652 if (ent->plt.offset
4653 == (bfd_vma) htab->plt_initial_entry_size)
4654 {
4655 htab->srelplt2->size
4656 += sizeof (Elf32_External_Rela)
4657 * VXWORKS_PLTRESOLVE_RELOCS;
4658 }
4659
4660 htab->srelplt2->size
4661 += sizeof (Elf32_External_Rela)
4662 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4663 }
4664
4665 /* Every PLT entry has an associated GOT entry in
4666 .got.plt. */
4667 htab->sgotplt->size += 4;
4668 }
4669 doneone = TRUE;
4670 }
4671 }
4672 else
4673 ent->plt.offset = (bfd_vma) -1;
4674 }
4675 else
4676 ent->plt.offset = (bfd_vma) -1;
4677
4678 if (!doneone)
4679 {
4680 h->plt.plist = NULL;
4681 h->needs_plt = 0;
4682 }
4683 }
4684 else
4685 {
4686 h->plt.plist = NULL;
4687 h->needs_plt = 0;
4688 }
4689
4690 eh = (struct ppc_elf_link_hash_entry *) h;
4691 if (eh->elf.got.refcount > 0)
4692 {
4693 /* Make sure this symbol is output as a dynamic symbol. */
4694 if (eh->elf.dynindx == -1
4695 && !eh->elf.forced_local)
4696 {
4697 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4698 return FALSE;
4699 }
4700
4701 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4702 && !eh->elf.def_dynamic)
4703 {
4704 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4705 htab->tlsld_got.refcount += 1;
4706 eh->elf.got.offset = (bfd_vma) -1;
4707 }
4708 else
4709 {
4710 bfd_boolean dyn;
4711 unsigned int need = 0;
4712 if ((eh->tls_mask & TLS_TLS) != 0)
4713 {
4714 if ((eh->tls_mask & TLS_LD) != 0)
4715 need += 8;
4716 if ((eh->tls_mask & TLS_GD) != 0)
4717 need += 8;
4718 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4719 need += 4;
4720 if ((eh->tls_mask & TLS_DTPREL) != 0)
4721 need += 4;
4722 }
4723 else
4724 need += 4;
4725 eh->elf.got.offset = allocate_got (htab, need);
4726 dyn = htab->elf.dynamic_sections_created;
4727 if ((info->shared
4728 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4729 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4730 || eh->elf.root.type != bfd_link_hash_undefweak))
4731 {
4732 /* All the entries we allocated need relocs.
4733 Except LD only needs one. */
4734 if ((eh->tls_mask & TLS_LD) != 0)
4735 need -= 4;
4736 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4737 }
4738 }
4739 }
4740 else
4741 eh->elf.got.offset = (bfd_vma) -1;
4742
4743 if (eh->dyn_relocs == NULL)
4744 return TRUE;
4745
4746 /* In the shared -Bsymbolic case, discard space allocated for
4747 dynamic pc-relative relocs against symbols which turn out to be
4748 defined in regular objects. For the normal shared case, discard
4749 space for relocs that have become local due to symbol visibility
4750 changes. */
4751
4752 if (info->shared)
4753 {
4754 /* Relocs that use pc_count are those that appear on a call insn,
4755 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4756 generated via assembly. We want calls to protected symbols to
4757 resolve directly to the function rather than going via the plt.
4758 If people want function pointer comparisons to work as expected
4759 then they should avoid writing weird assembly. */
4760 if (SYMBOL_CALLS_LOCAL (info, h))
4761 {
4762 struct ppc_elf_dyn_relocs **pp;
4763
4764 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4765 {
4766 p->count -= p->pc_count;
4767 p->pc_count = 0;
4768 if (p->count == 0)
4769 *pp = p->next;
4770 else
4771 pp = &p->next;
4772 }
4773 }
4774
4775 /* Also discard relocs on undefined weak syms with non-default
4776 visibility. */
4777 if (eh->dyn_relocs != NULL
4778 && h->root.type == bfd_link_hash_undefweak)
4779 {
4780 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4781 eh->dyn_relocs = NULL;
4782
4783 /* Make sure undefined weak symbols are output as a dynamic
4784 symbol in PIEs. */
4785 else if (h->dynindx == -1
4786 && !h->forced_local)
4787 {
4788 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4789 return FALSE;
4790 }
4791 }
4792 }
4793 else if (ELIMINATE_COPY_RELOCS)
4794 {
4795 /* For the non-shared case, discard space for relocs against
4796 symbols which turn out to need copy relocs or are not
4797 dynamic. */
4798
4799 if (!h->non_got_ref
4800 && h->def_dynamic
4801 && !h->def_regular)
4802 {
4803 /* Make sure this symbol is output as a dynamic symbol.
4804 Undefined weak syms won't yet be marked as dynamic. */
4805 if (h->dynindx == -1
4806 && !h->forced_local)
4807 {
4808 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4809 return FALSE;
4810 }
4811
4812 /* If that succeeded, we know we'll be keeping all the
4813 relocs. */
4814 if (h->dynindx != -1)
4815 goto keep;
4816 }
4817
4818 eh->dyn_relocs = NULL;
4819
4820 keep: ;
4821 }
4822
4823 /* Finally, allocate space. */
4824 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4825 {
4826 asection *sreloc = elf_section_data (p->sec)->sreloc;
4827 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4828 }
4829
4830 return TRUE;
4831 }
4832
4833 /* Find any dynamic relocs that apply to read-only sections. */
4834
4835 static bfd_boolean
4836 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4837 {
4838 struct ppc_elf_dyn_relocs *p;
4839
4840 if (h->root.type == bfd_link_hash_indirect)
4841 return TRUE;
4842
4843 if (h->root.type == bfd_link_hash_warning)
4844 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4845
4846 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4847 {
4848 asection *s = p->sec->output_section;
4849
4850 if (s != NULL
4851 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4852 == (SEC_READONLY | SEC_ALLOC)))
4853 {
4854 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4855
4856 /* Not an error, just cut short the traversal. */
4857 return FALSE;
4858 }
4859 }
4860 return TRUE;
4861 }
4862
4863 /* Set the sizes of the dynamic sections. */
4864
4865 static bfd_boolean
4866 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4867 struct bfd_link_info *info)
4868 {
4869 struct ppc_elf_link_hash_table *htab;
4870 asection *s;
4871 bfd_boolean relocs;
4872 bfd *ibfd;
4873
4874 #ifdef DEBUG
4875 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4876 #endif
4877
4878 htab = ppc_elf_hash_table (info);
4879 BFD_ASSERT (htab->elf.dynobj != NULL);
4880
4881 if (elf_hash_table (info)->dynamic_sections_created)
4882 {
4883 /* Set the contents of the .interp section to the interpreter. */
4884 if (info->executable)
4885 {
4886 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4887 BFD_ASSERT (s != NULL);
4888 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4889 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4890 }
4891 }
4892
4893 if (htab->plt_type == PLT_OLD)
4894 htab->got_header_size = 16;
4895 else if (htab->plt_type == PLT_NEW)
4896 htab->got_header_size = 12;
4897
4898 /* Set up .got offsets for local syms, and space for local dynamic
4899 relocs. */
4900 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4901 {
4902 bfd_signed_vma *local_got;
4903 bfd_signed_vma *end_local_got;
4904 char *lgot_masks;
4905 bfd_size_type locsymcount;
4906 Elf_Internal_Shdr *symtab_hdr;
4907
4908 if (!is_ppc_elf (ibfd))
4909 continue;
4910
4911 for (s = ibfd->sections; s != NULL; s = s->next)
4912 {
4913 struct ppc_elf_dyn_relocs *p;
4914
4915 for (p = ((struct ppc_elf_dyn_relocs *)
4916 elf_section_data (s)->local_dynrel);
4917 p != NULL;
4918 p = p->next)
4919 {
4920 if (!bfd_is_abs_section (p->sec)
4921 && bfd_is_abs_section (p->sec->output_section))
4922 {
4923 /* Input section has been discarded, either because
4924 it is a copy of a linkonce section or due to
4925 linker script /DISCARD/, so we'll be discarding
4926 the relocs too. */
4927 }
4928 else if (p->count != 0)
4929 {
4930 elf_section_data (p->sec)->sreloc->size
4931 += p->count * sizeof (Elf32_External_Rela);
4932 if ((p->sec->output_section->flags
4933 & (SEC_READONLY | SEC_ALLOC))
4934 == (SEC_READONLY | SEC_ALLOC))
4935 info->flags |= DF_TEXTREL;
4936 }
4937 }
4938 }
4939
4940 local_got = elf_local_got_refcounts (ibfd);
4941 if (!local_got)
4942 continue;
4943
4944 symtab_hdr = &elf_symtab_hdr (ibfd);
4945 locsymcount = symtab_hdr->sh_info;
4946 end_local_got = local_got + locsymcount;
4947 lgot_masks = (char *) end_local_got;
4948 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4949 if (*local_got > 0)
4950 {
4951 if (*lgot_masks == (TLS_TLS | TLS_LD))
4952 {
4953 /* If just an LD reloc, we'll just use
4954 htab->tlsld_got.offset. */
4955 htab->tlsld_got.refcount += 1;
4956 *local_got = (bfd_vma) -1;
4957 }
4958 else
4959 {
4960 unsigned int need = 0;
4961 if ((*lgot_masks & TLS_TLS) != 0)
4962 {
4963 if ((*lgot_masks & TLS_GD) != 0)
4964 need += 8;
4965 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4966 need += 4;
4967 if ((*lgot_masks & TLS_DTPREL) != 0)
4968 need += 4;
4969 }
4970 else
4971 need += 4;
4972 *local_got = allocate_got (htab, need);
4973 if (info->shared)
4974 htab->relgot->size += (need
4975 * (sizeof (Elf32_External_Rela) / 4));
4976 }
4977 }
4978 else
4979 *local_got = (bfd_vma) -1;
4980 }
4981
4982 /* Allocate space for global sym dynamic relocs. */
4983 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4984
4985 if (htab->tlsld_got.refcount > 0)
4986 {
4987 htab->tlsld_got.offset = allocate_got (htab, 8);
4988 if (info->shared)
4989 htab->relgot->size += sizeof (Elf32_External_Rela);
4990 }
4991 else
4992 htab->tlsld_got.offset = (bfd_vma) -1;
4993
4994 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
4995 {
4996 unsigned int g_o_t = 32768;
4997
4998 /* If we haven't allocated the header, do so now. When we get here,
4999 for old plt/got the got size will be 0 to 32764 (not allocated),
5000 or 32780 to 65536 (header allocated). For new plt/got, the
5001 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5002 if (htab->got->size <= 32768)
5003 {
5004 g_o_t = htab->got->size;
5005 if (htab->plt_type == PLT_OLD)
5006 g_o_t += 4;
5007 htab->got->size += htab->got_header_size;
5008 }
5009
5010 htab->elf.hgot->root.u.def.value = g_o_t;
5011 }
5012
5013 if (htab->glink != NULL && htab->glink->size != 0)
5014 {
5015 htab->glink_pltresolve = htab->glink->size;
5016 /* Space for the branch table. */
5017 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5018 /* Pad out to align the start of PLTresolve. */
5019 htab->glink->size += -htab->glink->size & 15;
5020 htab->glink->size += GLINK_PLTRESOLVE;
5021
5022 if (htab->emit_stub_syms)
5023 {
5024 struct elf_link_hash_entry *sh;
5025 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5026 TRUE, FALSE, FALSE);
5027 if (sh == NULL)
5028 return FALSE;
5029 if (sh->root.type == bfd_link_hash_new)
5030 {
5031 sh->root.type = bfd_link_hash_defined;
5032 sh->root.u.def.section = htab->glink;
5033 sh->root.u.def.value = htab->glink_pltresolve;
5034 sh->ref_regular = 1;
5035 sh->def_regular = 1;
5036 sh->ref_regular_nonweak = 1;
5037 sh->forced_local = 1;
5038 sh->non_elf = 0;
5039 }
5040 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5041 TRUE, FALSE, FALSE);
5042 if (sh == NULL)
5043 return FALSE;
5044 if (sh->root.type == bfd_link_hash_new)
5045 {
5046 sh->root.type = bfd_link_hash_defined;
5047 sh->root.u.def.section = htab->glink;
5048 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5049 sh->ref_regular = 1;
5050 sh->def_regular = 1;
5051 sh->ref_regular_nonweak = 1;
5052 sh->forced_local = 1;
5053 sh->non_elf = 0;
5054 }
5055 }
5056 }
5057
5058 /* We've now determined the sizes of the various dynamic sections.
5059 Allocate memory for them. */
5060 relocs = FALSE;
5061 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5062 {
5063 bfd_boolean strip_section = TRUE;
5064
5065 if ((s->flags & SEC_LINKER_CREATED) == 0)
5066 continue;
5067
5068 if (s == htab->plt
5069 || s == htab->glink
5070 || s == htab->got
5071 || s == htab->sgotplt
5072 || s == htab->sbss
5073 || s == htab->dynbss
5074 || s == htab->dynsbss)
5075 {
5076 /* We'd like to strip these sections if they aren't needed, but if
5077 we've exported dynamic symbols from them we must leave them.
5078 It's too late to tell BFD to get rid of the symbols. */
5079 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5080 strip_section = FALSE;
5081 /* Strip this section if we don't need it; see the
5082 comment below. */
5083 }
5084 else if (s == htab->sdata[0].section
5085 || s == htab->sdata[1].section)
5086 {
5087 /* Strip these too. */
5088 }
5089 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5090 {
5091 if (s->size != 0)
5092 {
5093 /* Remember whether there are any relocation sections. */
5094 relocs = TRUE;
5095
5096 /* We use the reloc_count field as a counter if we need
5097 to copy relocs into the output file. */
5098 s->reloc_count = 0;
5099 }
5100 }
5101 else
5102 {
5103 /* It's not one of our sections, so don't allocate space. */
5104 continue;
5105 }
5106
5107 if (s->size == 0 && strip_section)
5108 {
5109 /* If we don't need this section, strip it from the
5110 output file. This is mostly to handle .rela.bss and
5111 .rela.plt. We must create both sections in
5112 create_dynamic_sections, because they must be created
5113 before the linker maps input sections to output
5114 sections. The linker does that before
5115 adjust_dynamic_symbol is called, and it is that
5116 function which decides whether anything needs to go
5117 into these sections. */
5118 s->flags |= SEC_EXCLUDE;
5119 continue;
5120 }
5121
5122 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5123 continue;
5124
5125 /* Allocate memory for the section contents. */
5126 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5127 if (s->contents == NULL)
5128 return FALSE;
5129 }
5130
5131 if (htab->elf.dynamic_sections_created)
5132 {
5133 /* Add some entries to the .dynamic section. We fill in the
5134 values later, in ppc_elf_finish_dynamic_sections, but we
5135 must add the entries now so that we get the correct size for
5136 the .dynamic section. The DT_DEBUG entry is filled in by the
5137 dynamic linker and used by the debugger. */
5138 #define add_dynamic_entry(TAG, VAL) \
5139 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5140
5141 if (info->executable)
5142 {
5143 if (!add_dynamic_entry (DT_DEBUG, 0))
5144 return FALSE;
5145 }
5146
5147 if (htab->plt != NULL && htab->plt->size != 0)
5148 {
5149 if (!add_dynamic_entry (DT_PLTGOT, 0)
5150 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5151 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5152 || !add_dynamic_entry (DT_JMPREL, 0))
5153 return FALSE;
5154 }
5155
5156 if (htab->glink != NULL && htab->glink->size != 0)
5157 {
5158 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5159 return FALSE;
5160 }
5161
5162 if (relocs)
5163 {
5164 if (!add_dynamic_entry (DT_RELA, 0)
5165 || !add_dynamic_entry (DT_RELASZ, 0)
5166 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5167 return FALSE;
5168 }
5169
5170 /* If any dynamic relocs apply to a read-only section, then we
5171 need a DT_TEXTREL entry. */
5172 if ((info->flags & DF_TEXTREL) == 0)
5173 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5174 info);
5175
5176 if ((info->flags & DF_TEXTREL) != 0)
5177 {
5178 if (!add_dynamic_entry (DT_TEXTREL, 0))
5179 return FALSE;
5180 }
5181 if (htab->is_vxworks
5182 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5183 return FALSE;
5184 }
5185 #undef add_dynamic_entry
5186
5187 return TRUE;
5188 }
5189 \f
5190 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5191
5192 static const int shared_stub_entry[] =
5193 {
5194 0x7c0802a6, /* mflr 0 */
5195 0x429f0005, /* bcl 20, 31, .Lxxx */
5196 0x7d6802a6, /* mflr 11 */
5197 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5198 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5199 0x7c0803a6, /* mtlr 0 */
5200 0x7d6903a6, /* mtctr 11 */
5201 0x4e800420, /* bctr */
5202 };
5203
5204 static const int stub_entry[] =
5205 {
5206 0x3d600000, /* lis 11,xxx@ha */
5207 0x396b0000, /* addi 11,11,xxx@l */
5208 0x7d6903a6, /* mtctr 11 */
5209 0x4e800420, /* bctr */
5210 };
5211
5212 static bfd_boolean
5213 ppc_elf_relax_section (bfd *abfd,
5214 asection *isec,
5215 struct bfd_link_info *link_info,
5216 bfd_boolean *again)
5217 {
5218 struct one_fixup
5219 {
5220 struct one_fixup *next;
5221 asection *tsec;
5222 bfd_vma toff;
5223 bfd_vma trampoff;
5224 };
5225
5226 Elf_Internal_Shdr *symtab_hdr;
5227 bfd_byte *contents = NULL;
5228 Elf_Internal_Sym *isymbuf = NULL;
5229 Elf_Internal_Rela *internal_relocs = NULL;
5230 Elf_Internal_Rela *irel, *irelend;
5231 struct one_fixup *fixups = NULL;
5232 bfd_boolean changed;
5233 struct ppc_elf_link_hash_table *htab;
5234 bfd_size_type trampoff;
5235 asection *got2;
5236
5237 *again = FALSE;
5238
5239 /* Nothing to do if there are no relocations, and no need to do
5240 anything with non-alloc sections. */
5241 if ((isec->flags & SEC_ALLOC) == 0
5242 || (isec->flags & SEC_RELOC) == 0
5243 || isec->reloc_count == 0)
5244 return TRUE;
5245
5246 trampoff = (isec->size + 3) & (bfd_vma) -4;
5247 /* Space for a branch around any trampolines. */
5248 trampoff += 4;
5249
5250 symtab_hdr = &elf_symtab_hdr (abfd);
5251
5252 /* Get a copy of the native relocations. */
5253 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5254 link_info->keep_memory);
5255 if (internal_relocs == NULL)
5256 goto error_return;
5257
5258 htab = ppc_elf_hash_table (link_info);
5259 got2 = bfd_get_section_by_name (abfd, ".got2");
5260
5261 irelend = internal_relocs + isec->reloc_count;
5262 for (irel = internal_relocs; irel < irelend; irel++)
5263 {
5264 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5265 bfd_vma symaddr, reladdr, toff, roff;
5266 asection *tsec;
5267 struct one_fixup *f;
5268 size_t insn_offset = 0;
5269 bfd_vma max_branch_offset, val;
5270 bfd_byte *hit_addr;
5271 unsigned long t0;
5272 unsigned char sym_type;
5273
5274 switch (r_type)
5275 {
5276 case R_PPC_REL24:
5277 case R_PPC_LOCAL24PC:
5278 case R_PPC_PLTREL24:
5279 max_branch_offset = 1 << 25;
5280 break;
5281
5282 case R_PPC_REL14:
5283 case R_PPC_REL14_BRTAKEN:
5284 case R_PPC_REL14_BRNTAKEN:
5285 max_branch_offset = 1 << 15;
5286 break;
5287
5288 default:
5289 continue;
5290 }
5291
5292 /* Get the value of the symbol referred to by the reloc. */
5293 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5294 {
5295 /* A local symbol. */
5296 Elf_Internal_Sym *isym;
5297
5298 /* Read this BFD's local symbols. */
5299 if (isymbuf == NULL)
5300 {
5301 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5302 if (isymbuf == NULL)
5303 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5304 symtab_hdr->sh_info, 0,
5305 NULL, NULL, NULL);
5306 if (isymbuf == 0)
5307 goto error_return;
5308 }
5309 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5310 if (isym->st_shndx == SHN_UNDEF)
5311 continue; /* We can't do anything with undefined symbols. */
5312 else if (isym->st_shndx == SHN_ABS)
5313 tsec = bfd_abs_section_ptr;
5314 else if (isym->st_shndx == SHN_COMMON)
5315 tsec = bfd_com_section_ptr;
5316 else
5317 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5318
5319 toff = isym->st_value;
5320 sym_type = ELF_ST_TYPE (isym->st_info);
5321 }
5322 else
5323 {
5324 /* Global symbol handling. */
5325 unsigned long indx;
5326 struct elf_link_hash_entry *h;
5327
5328 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5329 h = elf_sym_hashes (abfd)[indx];
5330
5331 while (h->root.type == bfd_link_hash_indirect
5332 || h->root.type == bfd_link_hash_warning)
5333 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5334
5335 tsec = NULL;
5336 toff = 0;
5337 if (r_type == R_PPC_PLTREL24
5338 && htab->plt != NULL)
5339 {
5340 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5341
5342 if (ent != NULL)
5343 {
5344 if (htab->plt_type == PLT_NEW)
5345 {
5346 tsec = htab->glink;
5347 toff = ent->glink_offset;
5348 }
5349 else
5350 {
5351 tsec = htab->plt;
5352 toff = ent->plt.offset;
5353 }
5354 }
5355 }
5356 if (tsec != NULL)
5357 ;
5358 else if (h->root.type == bfd_link_hash_defined
5359 || h->root.type == bfd_link_hash_defweak)
5360 {
5361 tsec = h->root.u.def.section;
5362 toff = h->root.u.def.value;
5363 }
5364 else
5365 continue;
5366
5367 sym_type = h->type;
5368 }
5369
5370 /* If the branch and target are in the same section, you have
5371 no hope of adding stubs. We'll error out later should the
5372 branch overflow. */
5373 if (tsec == isec)
5374 continue;
5375
5376 /* There probably isn't any reason to handle symbols in
5377 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5378 attribute for a code section, and we are only looking at
5379 branches. However, implement it correctly here as a
5380 reference for other target relax_section functions. */
5381 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5382 {
5383 /* At this stage in linking, no SEC_MERGE symbol has been
5384 adjusted, so all references to such symbols need to be
5385 passed through _bfd_merged_section_offset. (Later, in
5386 relocate_section, all SEC_MERGE symbols *except* for
5387 section symbols have been adjusted.)
5388
5389 gas may reduce relocations against symbols in SEC_MERGE
5390 sections to a relocation against the section symbol when
5391 the original addend was zero. When the reloc is against
5392 a section symbol we should include the addend in the
5393 offset passed to _bfd_merged_section_offset, since the
5394 location of interest is the original symbol. On the
5395 other hand, an access to "sym+addend" where "sym" is not
5396 a section symbol should not include the addend; Such an
5397 access is presumed to be an offset from "sym"; The
5398 location of interest is just "sym". */
5399 if (sym_type == STT_SECTION)
5400 toff += irel->r_addend;
5401
5402 toff = _bfd_merged_section_offset (abfd, &tsec,
5403 elf_section_data (tsec)->sec_info,
5404 toff);
5405
5406 if (sym_type != STT_SECTION)
5407 toff += irel->r_addend;
5408 }
5409 /* PLTREL24 addends are special. */
5410 else if (r_type != R_PPC_PLTREL24)
5411 toff += irel->r_addend;
5412
5413 /* Attempted -shared link of non-pic code loses. */
5414 if (tsec->output_section == NULL)
5415 continue;
5416
5417 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5418
5419 roff = irel->r_offset;
5420 reladdr = isec->output_section->vma + isec->output_offset + roff;
5421
5422 /* If the branch is in range, no need to do anything. */
5423 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5424 continue;
5425
5426 /* Look for an existing fixup to this address. */
5427 for (f = fixups; f ; f = f->next)
5428 if (f->tsec == tsec && f->toff == toff)
5429 break;
5430
5431 if (f == NULL)
5432 {
5433 size_t size;
5434 unsigned long stub_rtype;
5435
5436 val = trampoff - roff;
5437 if (val >= max_branch_offset)
5438 /* Oh dear, we can't reach a trampoline. Don't try to add
5439 one. We'll report an error later. */
5440 continue;
5441
5442 if (link_info->shared)
5443 {
5444 size = 4 * ARRAY_SIZE (shared_stub_entry);
5445 insn_offset = 12;
5446 stub_rtype = R_PPC_RELAX32PC;
5447 }
5448 else
5449 {
5450 size = 4 * ARRAY_SIZE (stub_entry);
5451 insn_offset = 0;
5452 stub_rtype = R_PPC_RELAX32;
5453 }
5454
5455 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5456 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5457 abort ();
5458 if (tsec == htab->plt
5459 || tsec == htab->glink)
5460 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5461
5462 /* Hijack the old relocation. Since we need two
5463 relocations for this use a "composite" reloc. */
5464 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5465 stub_rtype);
5466 irel->r_offset = trampoff + insn_offset;
5467
5468 /* Record the fixup so we don't do it again this section. */
5469 f = bfd_malloc (sizeof (*f));
5470 f->next = fixups;
5471 f->tsec = tsec;
5472 f->toff = toff;
5473 f->trampoff = trampoff;
5474 fixups = f;
5475
5476 trampoff += size;
5477 }
5478 else
5479 {
5480 val = f->trampoff - roff;
5481 if (val >= max_branch_offset)
5482 continue;
5483
5484 /* Nop out the reloc, since we're finalizing things here. */
5485 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5486 }
5487
5488 /* Get the section contents. */
5489 if (contents == NULL)
5490 {
5491 /* Get cached copy if it exists. */
5492 if (elf_section_data (isec)->this_hdr.contents != NULL)
5493 contents = elf_section_data (isec)->this_hdr.contents;
5494 else
5495 {
5496 /* Go get them off disk. */
5497 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5498 goto error_return;
5499 }
5500 }
5501
5502 /* Fix up the existing branch to hit the trampoline. */
5503 hit_addr = contents + roff;
5504 switch (r_type)
5505 {
5506 case R_PPC_REL24:
5507 case R_PPC_LOCAL24PC:
5508 case R_PPC_PLTREL24:
5509 t0 = bfd_get_32 (abfd, hit_addr);
5510 t0 &= ~0x3fffffc;
5511 t0 |= val & 0x3fffffc;
5512 bfd_put_32 (abfd, t0, hit_addr);
5513 break;
5514
5515 case R_PPC_REL14:
5516 case R_PPC_REL14_BRTAKEN:
5517 case R_PPC_REL14_BRNTAKEN:
5518 t0 = bfd_get_32 (abfd, hit_addr);
5519 t0 &= ~0xfffc;
5520 t0 |= val & 0xfffc;
5521 bfd_put_32 (abfd, t0, hit_addr);
5522 break;
5523 }
5524 }
5525
5526 /* Write out the trampolines. */
5527 changed = fixups != NULL;
5528 if (fixups != NULL)
5529 {
5530 const int *stub;
5531 bfd_byte *dest;
5532 bfd_vma val;
5533 int i, size;
5534
5535 do
5536 {
5537 struct one_fixup *f = fixups;
5538 fixups = fixups->next;
5539 free (f);
5540 }
5541 while (fixups);
5542
5543 contents = bfd_realloc (contents, trampoff);
5544 if (contents == NULL)
5545 goto error_return;
5546
5547 isec->size = (isec->size + 3) & (bfd_vma) -4;
5548 /* Branch around the trampolines. */
5549 val = trampoff - isec->size + 0x48000000;
5550 dest = contents + isec->size;
5551 isec->size = trampoff;
5552 bfd_put_32 (abfd, val, dest);
5553 dest += 4;
5554
5555 if (link_info->shared)
5556 {
5557 stub = shared_stub_entry;
5558 size = ARRAY_SIZE (shared_stub_entry);
5559 }
5560 else
5561 {
5562 stub = stub_entry;
5563 size = ARRAY_SIZE (stub_entry);
5564 }
5565
5566 i = 0;
5567 while (dest < contents + trampoff)
5568 {
5569 bfd_put_32 (abfd, stub[i], dest);
5570 i++;
5571 if (i == size)
5572 i = 0;
5573 dest += 4;
5574 }
5575 BFD_ASSERT (i == 0);
5576 }
5577
5578 if (isymbuf != NULL
5579 && symtab_hdr->contents != (unsigned char *) isymbuf)
5580 {
5581 if (! link_info->keep_memory)
5582 free (isymbuf);
5583 else
5584 {
5585 /* Cache the symbols for elf_link_input_bfd. */
5586 symtab_hdr->contents = (unsigned char *) isymbuf;
5587 }
5588 }
5589
5590 if (contents != NULL
5591 && elf_section_data (isec)->this_hdr.contents != contents)
5592 {
5593 if (!changed && !link_info->keep_memory)
5594 free (contents);
5595 else
5596 {
5597 /* Cache the section contents for elf_link_input_bfd. */
5598 elf_section_data (isec)->this_hdr.contents = contents;
5599 }
5600 }
5601
5602 if (elf_section_data (isec)->relocs != internal_relocs)
5603 {
5604 if (!changed)
5605 free (internal_relocs);
5606 else
5607 elf_section_data (isec)->relocs = internal_relocs;
5608 }
5609
5610 *again = changed;
5611 return TRUE;
5612
5613 error_return:
5614 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5615 free (isymbuf);
5616 if (contents != NULL
5617 && elf_section_data (isec)->this_hdr.contents != contents)
5618 free (contents);
5619 if (internal_relocs != NULL
5620 && elf_section_data (isec)->relocs != internal_relocs)
5621 free (internal_relocs);
5622 return FALSE;
5623 }
5624 \f
5625 /* What to do when ld finds relocations against symbols defined in
5626 discarded sections. */
5627
5628 static unsigned int
5629 ppc_elf_action_discarded (asection *sec)
5630 {
5631 if (strcmp (".fixup", sec->name) == 0)
5632 return 0;
5633
5634 if (strcmp (".got2", sec->name) == 0)
5635 return 0;
5636
5637 return _bfd_elf_default_action_discarded (sec);
5638 }
5639 \f
5640 /* Fill in the address for a pointer generated in a linker section. */
5641
5642 static bfd_vma
5643 elf_finish_pointer_linker_section (bfd *input_bfd,
5644 elf_linker_section_t *lsect,
5645 struct elf_link_hash_entry *h,
5646 bfd_vma relocation,
5647 const Elf_Internal_Rela *rel)
5648 {
5649 elf_linker_section_pointers_t *linker_section_ptr;
5650
5651 BFD_ASSERT (lsect != NULL);
5652
5653 if (h != NULL)
5654 {
5655 /* Handle global symbol. */
5656 struct ppc_elf_link_hash_entry *eh;
5657
5658 eh = (struct ppc_elf_link_hash_entry *) h;
5659 BFD_ASSERT (eh->elf.def_regular);
5660 linker_section_ptr = eh->linker_section_pointer;
5661 }
5662 else
5663 {
5664 /* Handle local symbol. */
5665 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5666
5667 BFD_ASSERT (is_ppc_elf (input_bfd));
5668 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5669 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5670 }
5671
5672 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5673 rel->r_addend,
5674 lsect);
5675 BFD_ASSERT (linker_section_ptr != NULL);
5676
5677 /* Offset will always be a multiple of four, so use the bottom bit
5678 as a "written" flag. */
5679 if ((linker_section_ptr->offset & 1) == 0)
5680 {
5681 bfd_put_32 (lsect->section->owner,
5682 relocation + linker_section_ptr->addend,
5683 lsect->section->contents + linker_section_ptr->offset);
5684 linker_section_ptr->offset += 1;
5685 }
5686
5687 relocation = (lsect->section->output_offset
5688 + linker_section_ptr->offset - 1
5689 - 0x8000);
5690
5691 #ifdef DEBUG
5692 fprintf (stderr,
5693 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5694 lsect->name, (long) relocation, (long) relocation);
5695 #endif
5696
5697 /* Subtract out the addend, because it will get added back in by the normal
5698 processing. */
5699 return relocation - linker_section_ptr->addend;
5700 }
5701
5702 /* The RELOCATE_SECTION function is called by the ELF backend linker
5703 to handle the relocations for a section.
5704
5705 The relocs are always passed as Rela structures; if the section
5706 actually uses Rel structures, the r_addend field will always be
5707 zero.
5708
5709 This function is responsible for adjust the section contents as
5710 necessary, and (if using Rela relocs and generating a
5711 relocatable output file) adjusting the reloc addend as
5712 necessary.
5713
5714 This function does not have to worry about setting the reloc
5715 address or the reloc symbol index.
5716
5717 LOCAL_SYMS is a pointer to the swapped in local symbols.
5718
5719 LOCAL_SECTIONS is an array giving the section in the input file
5720 corresponding to the st_shndx field of each local symbol.
5721
5722 The global hash table entry for the global symbols can be found
5723 via elf_sym_hashes (input_bfd).
5724
5725 When generating relocatable output, this function must handle
5726 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5727 going to be the section symbol corresponding to the output
5728 section, which means that the addend must be adjusted
5729 accordingly. */
5730
5731 static bfd_boolean
5732 ppc_elf_relocate_section (bfd *output_bfd,
5733 struct bfd_link_info *info,
5734 bfd *input_bfd,
5735 asection *input_section,
5736 bfd_byte *contents,
5737 Elf_Internal_Rela *relocs,
5738 Elf_Internal_Sym *local_syms,
5739 asection **local_sections)
5740 {
5741 Elf_Internal_Shdr *symtab_hdr;
5742 struct elf_link_hash_entry **sym_hashes;
5743 struct ppc_elf_link_hash_table *htab;
5744 Elf_Internal_Rela *rel;
5745 Elf_Internal_Rela *relend;
5746 Elf_Internal_Rela outrel;
5747 bfd_byte *loc;
5748 asection *got2, *sreloc = NULL;
5749 bfd_vma *local_got_offsets;
5750 bfd_boolean ret = TRUE;
5751 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5752
5753 #ifdef DEBUG
5754 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5755 "%ld relocations%s",
5756 input_bfd, input_section,
5757 (long) input_section->reloc_count,
5758 (info->relocatable) ? " (relocatable)" : "");
5759 #endif
5760
5761 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5762
5763 /* Initialize howto table if not already done. */
5764 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5765 ppc_elf_howto_init ();
5766
5767 htab = ppc_elf_hash_table (info);
5768 local_got_offsets = elf_local_got_offsets (input_bfd);
5769 symtab_hdr = &elf_symtab_hdr (input_bfd);
5770 sym_hashes = elf_sym_hashes (input_bfd);
5771 rel = relocs;
5772 relend = relocs + input_section->reloc_count;
5773 for (; rel < relend; rel++)
5774 {
5775 enum elf_ppc_reloc_type r_type;
5776 bfd_vma addend;
5777 bfd_reloc_status_type r;
5778 Elf_Internal_Sym *sym;
5779 asection *sec;
5780 struct elf_link_hash_entry *h;
5781 const char *sym_name;
5782 reloc_howto_type *howto;
5783 unsigned long r_symndx;
5784 bfd_vma relocation;
5785 bfd_vma branch_bit, insn, from;
5786 bfd_boolean unresolved_reloc;
5787 bfd_boolean warned;
5788 unsigned int tls_type, tls_mask, tls_gd;
5789
5790 r_type = ELF32_R_TYPE (rel->r_info);
5791 sym = NULL;
5792 sec = NULL;
5793 h = NULL;
5794 unresolved_reloc = FALSE;
5795 warned = FALSE;
5796 r_symndx = ELF32_R_SYM (rel->r_info);
5797
5798 if (r_symndx < symtab_hdr->sh_info)
5799 {
5800 sym = local_syms + r_symndx;
5801 sec = local_sections[r_symndx];
5802 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5803
5804 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5805 }
5806 else
5807 {
5808 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5809 r_symndx, symtab_hdr, sym_hashes,
5810 h, sec, relocation,
5811 unresolved_reloc, warned);
5812
5813 sym_name = h->root.root.string;
5814 }
5815
5816 if (sec != NULL && elf_discarded_section (sec))
5817 {
5818 /* For relocs against symbols from removed linkonce sections,
5819 or sections discarded by a linker script, we just want the
5820 section contents zeroed. Avoid any special processing. */
5821 howto = NULL;
5822 if (r_type < R_PPC_max)
5823 howto = ppc_elf_howto_table[r_type];
5824 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5825 rel->r_info = 0;
5826 rel->r_addend = 0;
5827 continue;
5828 }
5829
5830 if (info->relocatable)
5831 {
5832 if (got2 != NULL
5833 && r_type == R_PPC_PLTREL24
5834 && rel->r_addend >= 32768)
5835 {
5836 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5837 addend specifies the GOT pointer offset within .got2. */
5838 rel->r_addend += got2->output_offset;
5839 }
5840 continue;
5841 }
5842
5843 /* TLS optimizations. Replace instruction sequences and relocs
5844 based on information we collected in tls_optimize. We edit
5845 RELOCS so that --emit-relocs will output something sensible
5846 for the final instruction stream. */
5847 tls_mask = 0;
5848 tls_gd = 0;
5849 if (IS_PPC_TLS_RELOC (r_type))
5850 {
5851 if (h != NULL)
5852 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5853 else if (local_got_offsets != NULL)
5854 {
5855 char *lgot_masks;
5856 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5857 tls_mask = lgot_masks[r_symndx];
5858 }
5859 }
5860
5861 /* Ensure reloc mapping code below stays sane. */
5862 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5863 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5864 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5865 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5866 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5867 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5868 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5869 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5870 abort ();
5871 switch (r_type)
5872 {
5873 default:
5874 break;
5875
5876 case R_PPC_GOT_TPREL16:
5877 case R_PPC_GOT_TPREL16_LO:
5878 if (tls_mask != 0
5879 && (tls_mask & TLS_TPREL) == 0)
5880 {
5881 bfd_vma insn;
5882 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5883 insn &= 31 << 21;
5884 insn |= 0x3c020000; /* addis 0,2,0 */
5885 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5886 r_type = R_PPC_TPREL16_HA;
5887 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5888 }
5889 break;
5890
5891 case R_PPC_TLS:
5892 if (tls_mask != 0
5893 && (tls_mask & TLS_TPREL) == 0)
5894 {
5895 bfd_vma insn, rtra;
5896 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5897 if ((insn & ((31 << 26) | (31 << 11)))
5898 == ((31 << 26) | (2 << 11)))
5899 rtra = insn & ((1 << 26) - (1 << 16));
5900 else if ((insn & ((31 << 26) | (31 << 16)))
5901 == ((31 << 26) | (2 << 16)))
5902 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5903 else
5904 abort ();
5905 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5906 /* add -> addi. */
5907 insn = 14 << 26;
5908 else if ((insn & (31 << 1)) == 23 << 1
5909 && ((insn & (31 << 6)) < 14 << 6
5910 || ((insn & (31 << 6)) >= 16 << 6
5911 && (insn & (31 << 6)) < 24 << 6)))
5912 /* load and store indexed -> dform. */
5913 insn = (32 | ((insn >> 6) & 31)) << 26;
5914 else if ((insn & (31 << 1)) == 21 << 1
5915 && (insn & (0x1a << 6)) == 0)
5916 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5917 insn = (((58 | ((insn >> 6) & 4)) << 26)
5918 | ((insn >> 6) & 1));
5919 else if ((insn & (31 << 1)) == 21 << 1
5920 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5921 /* lwax -> lwa. */
5922 insn = (58 << 26) | 2;
5923 else
5924 abort ();
5925 insn |= rtra;
5926 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5927 r_type = R_PPC_TPREL16_LO;
5928 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5929
5930 /* Was PPC_TLS which sits on insn boundary, now
5931 PPC_TPREL16_LO which is at low-order half-word. */
5932 rel->r_offset += d_offset;
5933 }
5934 break;
5935
5936 case R_PPC_GOT_TLSGD16_HI:
5937 case R_PPC_GOT_TLSGD16_HA:
5938 tls_gd = TLS_TPRELGD;
5939 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5940 goto tls_gdld_hi;
5941 break;
5942
5943 case R_PPC_GOT_TLSLD16_HI:
5944 case R_PPC_GOT_TLSLD16_HA:
5945 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5946 {
5947 tls_gdld_hi:
5948 if ((tls_mask & tls_gd) != 0)
5949 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5950 + R_PPC_GOT_TPREL16);
5951 else
5952 {
5953 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5954 rel->r_offset -= d_offset;
5955 r_type = R_PPC_NONE;
5956 }
5957 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5958 }
5959 break;
5960
5961 case R_PPC_GOT_TLSGD16:
5962 case R_PPC_GOT_TLSGD16_LO:
5963 tls_gd = TLS_TPRELGD;
5964 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5965 goto tls_ldgd_opt;
5966 break;
5967
5968 case R_PPC_GOT_TLSLD16:
5969 case R_PPC_GOT_TLSLD16_LO:
5970 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5971 {
5972 bfd_vma insn1, insn2;
5973 bfd_vma offset;
5974
5975 tls_ldgd_opt:
5976 offset = rel[1].r_offset;
5977 insn1 = bfd_get_32 (output_bfd,
5978 contents + rel->r_offset - d_offset);
5979 if ((tls_mask & tls_gd) != 0)
5980 {
5981 /* IE */
5982 insn1 &= (1 << 26) - 1;
5983 insn1 |= 32 << 26; /* lwz */
5984 insn2 = 0x7c631214; /* add 3,3,2 */
5985 rel[1].r_info
5986 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
5987 rel[1].r_addend = 0;
5988 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5989 + R_PPC_GOT_TPREL16);
5990 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5991 }
5992 else
5993 {
5994 /* LE */
5995 insn1 = 0x3c620000; /* addis 3,2,0 */
5996 insn2 = 0x38630000; /* addi 3,3,0 */
5997 if (tls_gd == 0)
5998 {
5999 /* Was an LD reloc. */
6000 r_symndx = 0;
6001 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6002 }
6003 r_type = R_PPC_TPREL16_HA;
6004 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6005 rel[1].r_info = ELF32_R_INFO (r_symndx,
6006 R_PPC_TPREL16_LO);
6007 rel[1].r_offset += d_offset;
6008 rel[1].r_addend = rel->r_addend;
6009 }
6010 bfd_put_32 (output_bfd, insn1,
6011 contents + rel->r_offset - d_offset);
6012 bfd_put_32 (output_bfd, insn2, contents + offset);
6013 if (tls_gd == 0)
6014 {
6015 /* We changed the symbol on an LD reloc. Start over
6016 in order to get h, sym, sec etc. right. */
6017 rel--;
6018 continue;
6019 }
6020 }
6021 break;
6022 }
6023
6024 /* Handle other relocations that tweak non-addend part of insn. */
6025 branch_bit = 0;
6026 switch (r_type)
6027 {
6028 default:
6029 break;
6030
6031 /* Branch taken prediction relocations. */
6032 case R_PPC_ADDR14_BRTAKEN:
6033 case R_PPC_REL14_BRTAKEN:
6034 branch_bit = BRANCH_PREDICT_BIT;
6035 /* Fall thru */
6036
6037 /* Branch not taken prediction relocations. */
6038 case R_PPC_ADDR14_BRNTAKEN:
6039 case R_PPC_REL14_BRNTAKEN:
6040 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6041 insn &= ~BRANCH_PREDICT_BIT;
6042 insn |= branch_bit;
6043
6044 from = (rel->r_offset
6045 + input_section->output_offset
6046 + input_section->output_section->vma);
6047
6048 /* Invert 'y' bit if not the default. */
6049 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6050 insn ^= BRANCH_PREDICT_BIT;
6051
6052 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6053 break;
6054 }
6055
6056 addend = rel->r_addend;
6057 tls_type = 0;
6058 howto = NULL;
6059 if (r_type < R_PPC_max)
6060 howto = ppc_elf_howto_table[r_type];
6061 switch (r_type)
6062 {
6063 default:
6064 (*_bfd_error_handler)
6065 (_("%B: unknown relocation type %d for symbol %s"),
6066 input_bfd, (int) r_type, sym_name);
6067
6068 bfd_set_error (bfd_error_bad_value);
6069 ret = FALSE;
6070 continue;
6071
6072 case R_PPC_NONE:
6073 case R_PPC_TLS:
6074 case R_PPC_EMB_MRKREF:
6075 case R_PPC_GNU_VTINHERIT:
6076 case R_PPC_GNU_VTENTRY:
6077 continue;
6078
6079 /* GOT16 relocations. Like an ADDR16 using the symbol's
6080 address in the GOT as relocation value instead of the
6081 symbol's value itself. Also, create a GOT entry for the
6082 symbol and put the symbol value there. */
6083 case R_PPC_GOT_TLSGD16:
6084 case R_PPC_GOT_TLSGD16_LO:
6085 case R_PPC_GOT_TLSGD16_HI:
6086 case R_PPC_GOT_TLSGD16_HA:
6087 tls_type = TLS_TLS | TLS_GD;
6088 goto dogot;
6089
6090 case R_PPC_GOT_TLSLD16:
6091 case R_PPC_GOT_TLSLD16_LO:
6092 case R_PPC_GOT_TLSLD16_HI:
6093 case R_PPC_GOT_TLSLD16_HA:
6094 tls_type = TLS_TLS | TLS_LD;
6095 goto dogot;
6096
6097 case R_PPC_GOT_TPREL16:
6098 case R_PPC_GOT_TPREL16_LO:
6099 case R_PPC_GOT_TPREL16_HI:
6100 case R_PPC_GOT_TPREL16_HA:
6101 tls_type = TLS_TLS | TLS_TPREL;
6102 goto dogot;
6103
6104 case R_PPC_GOT_DTPREL16:
6105 case R_PPC_GOT_DTPREL16_LO:
6106 case R_PPC_GOT_DTPREL16_HI:
6107 case R_PPC_GOT_DTPREL16_HA:
6108 tls_type = TLS_TLS | TLS_DTPREL;
6109 goto dogot;
6110
6111 case R_PPC_GOT16:
6112 case R_PPC_GOT16_LO:
6113 case R_PPC_GOT16_HI:
6114 case R_PPC_GOT16_HA:
6115 dogot:
6116 {
6117 /* Relocation is to the entry for this symbol in the global
6118 offset table. */
6119 bfd_vma off;
6120 bfd_vma *offp;
6121 unsigned long indx;
6122
6123 if (htab->got == NULL)
6124 abort ();
6125
6126 indx = 0;
6127 if (tls_type == (TLS_TLS | TLS_LD)
6128 && (h == NULL
6129 || !h->def_dynamic))
6130 offp = &htab->tlsld_got.offset;
6131 else if (h != NULL)
6132 {
6133 bfd_boolean dyn;
6134 dyn = htab->elf.dynamic_sections_created;
6135 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6136 || (info->shared
6137 && SYMBOL_REFERENCES_LOCAL (info, h)))
6138 /* This is actually a static link, or it is a
6139 -Bsymbolic link and the symbol is defined
6140 locally, or the symbol was forced to be local
6141 because of a version file. */
6142 ;
6143 else
6144 {
6145 indx = h->dynindx;
6146 unresolved_reloc = FALSE;
6147 }
6148 offp = &h->got.offset;
6149 }
6150 else
6151 {
6152 if (local_got_offsets == NULL)
6153 abort ();
6154 offp = &local_got_offsets[r_symndx];
6155 }
6156
6157 /* The offset must always be a multiple of 4. We use the
6158 least significant bit to record whether we have already
6159 processed this entry. */
6160 off = *offp;
6161 if ((off & 1) != 0)
6162 off &= ~1;
6163 else
6164 {
6165 unsigned int tls_m = (tls_mask
6166 & (TLS_LD | TLS_GD | TLS_DTPREL
6167 | TLS_TPREL | TLS_TPRELGD));
6168
6169 if (offp == &htab->tlsld_got.offset)
6170 tls_m = TLS_LD;
6171 else if (h == NULL
6172 || !h->def_dynamic)
6173 tls_m &= ~TLS_LD;
6174
6175 /* We might have multiple got entries for this sym.
6176 Initialize them all. */
6177 do
6178 {
6179 int tls_ty = 0;
6180
6181 if ((tls_m & TLS_LD) != 0)
6182 {
6183 tls_ty = TLS_TLS | TLS_LD;
6184 tls_m &= ~TLS_LD;
6185 }
6186 else if ((tls_m & TLS_GD) != 0)
6187 {
6188 tls_ty = TLS_TLS | TLS_GD;
6189 tls_m &= ~TLS_GD;
6190 }
6191 else if ((tls_m & TLS_DTPREL) != 0)
6192 {
6193 tls_ty = TLS_TLS | TLS_DTPREL;
6194 tls_m &= ~TLS_DTPREL;
6195 }
6196 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6197 {
6198 tls_ty = TLS_TLS | TLS_TPREL;
6199 tls_m = 0;
6200 }
6201
6202 /* Generate relocs for the dynamic linker. */
6203 if ((info->shared || indx != 0)
6204 && (h == NULL
6205 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6206 || h->root.type != bfd_link_hash_undefweak))
6207 {
6208 outrel.r_offset = (htab->got->output_section->vma
6209 + htab->got->output_offset
6210 + off);
6211 outrel.r_addend = 0;
6212 if (tls_ty & (TLS_LD | TLS_GD))
6213 {
6214 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6215 if (tls_ty == (TLS_TLS | TLS_GD))
6216 {
6217 loc = htab->relgot->contents;
6218 loc += (htab->relgot->reloc_count++
6219 * sizeof (Elf32_External_Rela));
6220 bfd_elf32_swap_reloca_out (output_bfd,
6221 &outrel, loc);
6222 outrel.r_offset += 4;
6223 outrel.r_info
6224 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6225 }
6226 }
6227 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6228 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6229 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6230 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6231 else if (indx == 0)
6232 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6233 else
6234 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6235 if (indx == 0)
6236 {
6237 outrel.r_addend += relocation;
6238 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6239 outrel.r_addend -= htab->elf.tls_sec->vma;
6240 }
6241 loc = htab->relgot->contents;
6242 loc += (htab->relgot->reloc_count++
6243 * sizeof (Elf32_External_Rela));
6244 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6245 }
6246
6247 /* Init the .got section contents if we're not
6248 emitting a reloc. */
6249 else
6250 {
6251 bfd_vma value = relocation;
6252
6253 if (tls_ty == (TLS_TLS | TLS_LD))
6254 value = 1;
6255 else if (tls_ty != 0)
6256 {
6257 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6258 if (tls_ty == (TLS_TLS | TLS_TPREL))
6259 value += DTP_OFFSET - TP_OFFSET;
6260
6261 if (tls_ty == (TLS_TLS | TLS_GD))
6262 {
6263 bfd_put_32 (output_bfd, value,
6264 htab->got->contents + off + 4);
6265 value = 1;
6266 }
6267 }
6268 bfd_put_32 (output_bfd, value,
6269 htab->got->contents + off);
6270 }
6271
6272 off += 4;
6273 if (tls_ty & (TLS_LD | TLS_GD))
6274 off += 4;
6275 }
6276 while (tls_m != 0);
6277
6278 off = *offp;
6279 *offp = off | 1;
6280 }
6281
6282 if (off >= (bfd_vma) -2)
6283 abort ();
6284
6285 if ((tls_type & TLS_TLS) != 0)
6286 {
6287 if (tls_type != (TLS_TLS | TLS_LD))
6288 {
6289 if ((tls_mask & TLS_LD) != 0
6290 && !(h == NULL
6291 || !h->def_dynamic))
6292 off += 8;
6293 if (tls_type != (TLS_TLS | TLS_GD))
6294 {
6295 if ((tls_mask & TLS_GD) != 0)
6296 off += 8;
6297 if (tls_type != (TLS_TLS | TLS_DTPREL))
6298 {
6299 if ((tls_mask & TLS_DTPREL) != 0)
6300 off += 4;
6301 }
6302 }
6303 }
6304 }
6305
6306 relocation = htab->got->output_offset + off;
6307 relocation -= htab->elf.hgot->root.u.def.value;
6308
6309 /* Addends on got relocations don't make much sense.
6310 x+off@got is actually x@got+off, and since the got is
6311 generated by a hash table traversal, the value in the
6312 got at entry m+n bears little relation to the entry m. */
6313 if (addend != 0)
6314 (*_bfd_error_handler)
6315 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6316 input_bfd,
6317 input_section,
6318 (long) rel->r_offset,
6319 howto->name,
6320 sym_name);
6321 }
6322 break;
6323
6324 /* Relocations that need no special processing. */
6325 case R_PPC_LOCAL24PC:
6326 /* It makes no sense to point a local relocation
6327 at a symbol not in this object. */
6328 if (unresolved_reloc)
6329 {
6330 if (! (*info->callbacks->undefined_symbol) (info,
6331 h->root.root.string,
6332 input_bfd,
6333 input_section,
6334 rel->r_offset,
6335 TRUE))
6336 return FALSE;
6337 continue;
6338 }
6339 break;
6340
6341 case R_PPC_DTPREL16:
6342 case R_PPC_DTPREL16_LO:
6343 case R_PPC_DTPREL16_HI:
6344 case R_PPC_DTPREL16_HA:
6345 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6346 break;
6347
6348 /* Relocations that may need to be propagated if this is a shared
6349 object. */
6350 case R_PPC_TPREL16:
6351 case R_PPC_TPREL16_LO:
6352 case R_PPC_TPREL16_HI:
6353 case R_PPC_TPREL16_HA:
6354 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6355 /* The TPREL16 relocs shouldn't really be used in shared
6356 libs as they will result in DT_TEXTREL being set, but
6357 support them anyway. */
6358 goto dodyn;
6359
6360 case R_PPC_TPREL32:
6361 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6362 goto dodyn;
6363
6364 case R_PPC_DTPREL32:
6365 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6366 goto dodyn;
6367
6368 case R_PPC_DTPMOD32:
6369 relocation = 1;
6370 addend = 0;
6371 goto dodyn;
6372
6373 case R_PPC_REL16:
6374 case R_PPC_REL16_LO:
6375 case R_PPC_REL16_HI:
6376 case R_PPC_REL16_HA:
6377 break;
6378
6379 case R_PPC_REL24:
6380 case R_PPC_REL32:
6381 case R_PPC_REL14:
6382 case R_PPC_REL14_BRTAKEN:
6383 case R_PPC_REL14_BRNTAKEN:
6384 /* If these relocations are not to a named symbol, they can be
6385 handled right here, no need to bother the dynamic linker. */
6386 if (SYMBOL_REFERENCES_LOCAL (info, h)
6387 || h == htab->elf.hgot)
6388 break;
6389 /* fall through */
6390
6391 /* Relocations that always need to be propagated if this is a shared
6392 object. */
6393 case R_PPC_ADDR32:
6394 case R_PPC_ADDR24:
6395 case R_PPC_ADDR16:
6396 case R_PPC_ADDR16_LO:
6397 case R_PPC_ADDR16_HI:
6398 case R_PPC_ADDR16_HA:
6399 case R_PPC_ADDR14:
6400 case R_PPC_ADDR14_BRTAKEN:
6401 case R_PPC_ADDR14_BRNTAKEN:
6402 case R_PPC_UADDR32:
6403 case R_PPC_UADDR16:
6404 dodyn:
6405 if ((input_section->flags & SEC_ALLOC) == 0)
6406 break;
6407 /* Fall thru. */
6408
6409 if ((info->shared
6410 && (h == NULL
6411 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6412 || h->root.type != bfd_link_hash_undefweak)
6413 && (MUST_BE_DYN_RELOC (r_type)
6414 || !SYMBOL_CALLS_LOCAL (info, h)))
6415 || (ELIMINATE_COPY_RELOCS
6416 && !info->shared
6417 && h != NULL
6418 && h->dynindx != -1
6419 && !h->non_got_ref
6420 && h->def_dynamic
6421 && !h->def_regular))
6422 {
6423 int skip;
6424
6425 #ifdef DEBUG
6426 fprintf (stderr, "ppc_elf_relocate_section needs to "
6427 "create relocation for %s\n",
6428 (h && h->root.root.string
6429 ? h->root.root.string : "<unknown>"));
6430 #endif
6431
6432 /* When generating a shared object, these relocations
6433 are copied into the output file to be resolved at run
6434 time. */
6435 if (sreloc == NULL)
6436 {
6437 const char *name;
6438
6439 name = (bfd_elf_string_from_elf_section
6440 (input_bfd,
6441 elf_elfheader (input_bfd)->e_shstrndx,
6442 elf_section_data (input_section)->rel_hdr.sh_name));
6443 if (name == NULL)
6444 return FALSE;
6445
6446 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6447 && strcmp (bfd_get_section_name (input_bfd,
6448 input_section),
6449 name + 5) == 0);
6450
6451 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6452 BFD_ASSERT (sreloc != NULL);
6453 }
6454
6455 skip = 0;
6456
6457 outrel.r_offset =
6458 _bfd_elf_section_offset (output_bfd, info, input_section,
6459 rel->r_offset);
6460 if (outrel.r_offset == (bfd_vma) -1
6461 || outrel.r_offset == (bfd_vma) -2)
6462 skip = (int) outrel.r_offset;
6463 outrel.r_offset += (input_section->output_section->vma
6464 + input_section->output_offset);
6465
6466 if (skip)
6467 memset (&outrel, 0, sizeof outrel);
6468 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6469 {
6470 unresolved_reloc = FALSE;
6471 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6472 outrel.r_addend = rel->r_addend;
6473 }
6474 else
6475 {
6476 outrel.r_addend = relocation + rel->r_addend;
6477
6478 if (r_type == R_PPC_ADDR32)
6479 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6480 else
6481 {
6482 long indx;
6483
6484 if (bfd_is_abs_section (sec))
6485 indx = 0;
6486 else if (sec == NULL || sec->owner == NULL)
6487 {
6488 bfd_set_error (bfd_error_bad_value);
6489 return FALSE;
6490 }
6491 else
6492 {
6493 asection *osec;
6494
6495 /* We are turning this relocation into one
6496 against a section symbol. It would be
6497 proper to subtract the symbol's value,
6498 osec->vma, from the emitted reloc addend,
6499 but ld.so expects buggy relocs. */
6500 osec = sec->output_section;
6501 indx = elf_section_data (osec)->dynindx;
6502 if (indx == 0)
6503 {
6504 osec = htab->elf.text_index_section;
6505 indx = elf_section_data (osec)->dynindx;
6506 }
6507 BFD_ASSERT (indx != 0);
6508 #ifdef DEBUG
6509 if (indx == 0)
6510 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6511 indx, osec->name, osec->flags,
6512 h->root.root.string);
6513 #endif
6514 }
6515
6516 outrel.r_info = ELF32_R_INFO (indx, r_type);
6517 }
6518 }
6519
6520 loc = sreloc->contents;
6521 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6522 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6523
6524 if (skip == -1)
6525 continue;
6526
6527 /* This reloc will be computed at runtime. We clear the memory
6528 so that it contains predictable value. */
6529 if (! skip
6530 && ((input_section->flags & SEC_ALLOC) != 0
6531 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6532 {
6533 relocation = howto->pc_relative ? outrel.r_offset : 0;
6534 addend = 0;
6535 break;
6536 }
6537 }
6538 break;
6539
6540 case R_PPC_RELAX32PC_PLT:
6541 case R_PPC_RELAX32_PLT:
6542 {
6543 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6544
6545 if (htab->plt_type == PLT_NEW)
6546 relocation = (htab->glink->output_section->vma
6547 + htab->glink->output_offset
6548 + ent->glink_offset);
6549 else
6550 relocation = (htab->plt->output_section->vma
6551 + htab->plt->output_offset
6552 + ent->plt.offset);
6553 addend = 0;
6554 }
6555 if (r_type == R_PPC_RELAX32_PLT)
6556 goto relax32;
6557 /* Fall thru */
6558
6559 case R_PPC_RELAX32PC:
6560 relocation -= (input_section->output_section->vma
6561 + input_section->output_offset
6562 + rel->r_offset - 4);
6563 /* Fall thru */
6564
6565 case R_PPC_RELAX32:
6566 relax32:
6567 {
6568 unsigned long t0;
6569 unsigned long t1;
6570
6571 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6572 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6573
6574 /* We're clearing the bits for R_PPC_ADDR16_HA
6575 and R_PPC_ADDR16_LO here. */
6576 t0 &= ~0xffff;
6577 t1 &= ~0xffff;
6578
6579 /* t0 is HA, t1 is LO */
6580 relocation += addend;
6581 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6582 t1 |= relocation & 0xffff;
6583
6584 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6585 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6586 }
6587 continue;
6588
6589 /* Indirect .sdata relocation. */
6590 case R_PPC_EMB_SDAI16:
6591 BFD_ASSERT (htab->sdata[0].section != NULL);
6592 relocation
6593 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6594 h, relocation, rel);
6595 break;
6596
6597 /* Indirect .sdata2 relocation. */
6598 case R_PPC_EMB_SDA2I16:
6599 BFD_ASSERT (htab->sdata[1].section != NULL);
6600 relocation
6601 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6602 h, relocation, rel);
6603 break;
6604
6605 /* Handle the TOC16 reloc. We want to use the offset within the .got
6606 section, not the actual VMA. This is appropriate when generating
6607 an embedded ELF object, for which the .got section acts like the
6608 AIX .toc section. */
6609 case R_PPC_TOC16: /* phony GOT16 relocations */
6610 BFD_ASSERT (sec != NULL);
6611 BFD_ASSERT (bfd_is_und_section (sec)
6612 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6613 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6614
6615 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6616 break;
6617
6618 case R_PPC_PLTREL24:
6619 /* Relocation is to the entry for this symbol in the
6620 procedure linkage table. */
6621 {
6622 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6623
6624 addend = 0;
6625 if (ent == NULL
6626 || htab->plt == NULL)
6627 {
6628 /* We didn't make a PLT entry for this symbol. This
6629 happens when statically linking PIC code, or when
6630 using -Bsymbolic. */
6631 break;
6632 }
6633
6634 unresolved_reloc = FALSE;
6635 if (htab->plt_type == PLT_NEW)
6636 relocation = (htab->glink->output_section->vma
6637 + htab->glink->output_offset
6638 + ent->glink_offset);
6639 else
6640 relocation = (htab->plt->output_section->vma
6641 + htab->plt->output_offset
6642 + ent->plt.offset);
6643 }
6644 break;
6645
6646 /* Relocate against _SDA_BASE_. */
6647 case R_PPC_SDAREL16:
6648 {
6649 const char *name;
6650 struct elf_link_hash_entry *sh;
6651
6652 BFD_ASSERT (sec != NULL);
6653 name = bfd_get_section_name (abfd, sec->output_section);
6654 if (! ((CONST_STRNEQ (name, ".sdata")
6655 && (name[6] == 0 || name[6] == '.'))
6656 || (CONST_STRNEQ (name, ".sbss")
6657 && (name[5] == 0 || name[5] == '.'))))
6658 {
6659 (*_bfd_error_handler)
6660 (_("%B: the target (%s) of a %s relocation is "
6661 "in the wrong output section (%s)"),
6662 input_bfd,
6663 sym_name,
6664 howto->name,
6665 name);
6666 }
6667 sh = htab->sdata[0].sym;
6668 addend -= (sh->root.u.def.value
6669 + sh->root.u.def.section->output_offset
6670 + sh->root.u.def.section->output_section->vma);
6671 }
6672 break;
6673
6674 /* Relocate against _SDA2_BASE_. */
6675 case R_PPC_EMB_SDA2REL:
6676 {
6677 const char *name;
6678 struct elf_link_hash_entry *sh;
6679
6680 BFD_ASSERT (sec != NULL);
6681 name = bfd_get_section_name (abfd, sec->output_section);
6682 if (! (CONST_STRNEQ (name, ".sdata2")
6683 || CONST_STRNEQ (name, ".sbss2")))
6684 {
6685 (*_bfd_error_handler)
6686 (_("%B: the target (%s) of a %s relocation is "
6687 "in the wrong output section (%s)"),
6688 input_bfd,
6689 sym_name,
6690 howto->name,
6691 name);
6692
6693 bfd_set_error (bfd_error_bad_value);
6694 ret = FALSE;
6695 continue;
6696 }
6697 sh = htab->sdata[1].sym;
6698 addend -= (sh->root.u.def.value
6699 + sh->root.u.def.section->output_offset
6700 + sh->root.u.def.section->output_section->vma);
6701 }
6702 break;
6703
6704 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6705 case R_PPC_EMB_SDA21:
6706 case R_PPC_EMB_RELSDA:
6707 {
6708 const char *name;
6709 int reg;
6710 struct elf_link_hash_entry *sh;
6711
6712 BFD_ASSERT (sec != NULL);
6713 name = bfd_get_section_name (abfd, sec->output_section);
6714 if (((CONST_STRNEQ (name, ".sdata")
6715 && (name[6] == 0 || name[6] == '.'))
6716 || (CONST_STRNEQ (name, ".sbss")
6717 && (name[5] == 0 || name[5] == '.'))))
6718 {
6719 reg = 13;
6720 sh = htab->sdata[0].sym;
6721 addend -= (sh->root.u.def.value
6722 + sh->root.u.def.section->output_offset
6723 + sh->root.u.def.section->output_section->vma);
6724 }
6725
6726 else if (CONST_STRNEQ (name, ".sdata2")
6727 || CONST_STRNEQ (name, ".sbss2"))
6728 {
6729 reg = 2;
6730 sh = htab->sdata[1].sym;
6731 addend -= (sh->root.u.def.value
6732 + sh->root.u.def.section->output_offset
6733 + sh->root.u.def.section->output_section->vma);
6734 }
6735
6736 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6737 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6738 {
6739 reg = 0;
6740 }
6741
6742 else
6743 {
6744 (*_bfd_error_handler)
6745 (_("%B: the target (%s) of a %s relocation is "
6746 "in the wrong output section (%s)"),
6747 input_bfd,
6748 sym_name,
6749 howto->name,
6750 name);
6751
6752 bfd_set_error (bfd_error_bad_value);
6753 ret = FALSE;
6754 continue;
6755 }
6756
6757 if (r_type == R_PPC_EMB_SDA21)
6758 { /* fill in register field */
6759 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6760 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6761 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6762 }
6763 }
6764 break;
6765
6766 /* Relocate against the beginning of the section. */
6767 case R_PPC_SECTOFF:
6768 case R_PPC_SECTOFF_LO:
6769 case R_PPC_SECTOFF_HI:
6770 case R_PPC_SECTOFF_HA:
6771 BFD_ASSERT (sec != NULL);
6772 addend -= sec->output_section->vma;
6773 break;
6774
6775 /* Negative relocations. */
6776 case R_PPC_EMB_NADDR32:
6777 case R_PPC_EMB_NADDR16:
6778 case R_PPC_EMB_NADDR16_LO:
6779 case R_PPC_EMB_NADDR16_HI:
6780 case R_PPC_EMB_NADDR16_HA:
6781 addend -= 2 * relocation;
6782 break;
6783
6784 case R_PPC_COPY:
6785 case R_PPC_GLOB_DAT:
6786 case R_PPC_JMP_SLOT:
6787 case R_PPC_RELATIVE:
6788 case R_PPC_PLT32:
6789 case R_PPC_PLTREL32:
6790 case R_PPC_PLT16_LO:
6791 case R_PPC_PLT16_HI:
6792 case R_PPC_PLT16_HA:
6793 case R_PPC_ADDR30:
6794 case R_PPC_EMB_RELSEC16:
6795 case R_PPC_EMB_RELST_LO:
6796 case R_PPC_EMB_RELST_HI:
6797 case R_PPC_EMB_RELST_HA:
6798 case R_PPC_EMB_BIT_FLD:
6799 (*_bfd_error_handler)
6800 (_("%B: relocation %s is not yet supported for symbol %s."),
6801 input_bfd,
6802 howto->name,
6803 sym_name);
6804
6805 bfd_set_error (bfd_error_invalid_operation);
6806 ret = FALSE;
6807 continue;
6808 }
6809
6810 /* Do any further special processing. */
6811 switch (r_type)
6812 {
6813 default:
6814 break;
6815
6816 case R_PPC_ADDR16_HA:
6817 case R_PPC_REL16_HA:
6818 case R_PPC_SECTOFF_HA:
6819 case R_PPC_TPREL16_HA:
6820 case R_PPC_DTPREL16_HA:
6821 case R_PPC_EMB_NADDR16_HA:
6822 case R_PPC_EMB_RELST_HA:
6823 /* It's just possible that this symbol is a weak symbol
6824 that's not actually defined anywhere. In that case,
6825 'sec' would be NULL, and we should leave the symbol
6826 alone (it will be set to zero elsewhere in the link). */
6827 if (sec == NULL)
6828 break;
6829 /* Fall thru */
6830
6831 case R_PPC_PLT16_HA:
6832 case R_PPC_GOT16_HA:
6833 case R_PPC_GOT_TLSGD16_HA:
6834 case R_PPC_GOT_TLSLD16_HA:
6835 case R_PPC_GOT_TPREL16_HA:
6836 case R_PPC_GOT_DTPREL16_HA:
6837 /* Add 0x10000 if sign bit in 0:15 is set.
6838 Bits 0:15 are not used. */
6839 addend += 0x8000;
6840 break;
6841 }
6842
6843 #ifdef DEBUG
6844 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6845 "offset = %ld, addend = %ld\n",
6846 howto->name,
6847 (int) r_type,
6848 sym_name,
6849 r_symndx,
6850 (long) rel->r_offset,
6851 (long) addend);
6852 #endif
6853
6854 if (unresolved_reloc
6855 && !((input_section->flags & SEC_DEBUGGING) != 0
6856 && h->def_dynamic))
6857 {
6858 (*_bfd_error_handler)
6859 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6860 input_bfd,
6861 input_section,
6862 (long) rel->r_offset,
6863 howto->name,
6864 sym_name);
6865 ret = FALSE;
6866 }
6867
6868 r = _bfd_final_link_relocate (howto,
6869 input_bfd,
6870 input_section,
6871 contents,
6872 rel->r_offset,
6873 relocation,
6874 addend);
6875
6876 if (r != bfd_reloc_ok)
6877 {
6878 if (r == bfd_reloc_overflow)
6879 {
6880 if (warned)
6881 continue;
6882 if (h != NULL
6883 && h->root.type == bfd_link_hash_undefweak
6884 && howto->pc_relative)
6885 {
6886 /* Assume this is a call protected by other code that
6887 detect the symbol is undefined. If this is the case,
6888 we can safely ignore the overflow. If not, the
6889 program is hosed anyway, and a little warning isn't
6890 going to help. */
6891
6892 continue;
6893 }
6894
6895 if (! (*info->callbacks->reloc_overflow) (info,
6896 (h ? &h->root : NULL),
6897 sym_name,
6898 howto->name,
6899 rel->r_addend,
6900 input_bfd,
6901 input_section,
6902 rel->r_offset))
6903 return FALSE;
6904 }
6905 else
6906 {
6907 (*_bfd_error_handler)
6908 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6909 input_bfd, input_section,
6910 (long) rel->r_offset, howto->name, sym_name, (int) r);
6911 ret = FALSE;
6912 }
6913 }
6914 }
6915
6916 #ifdef DEBUG
6917 fprintf (stderr, "\n");
6918 #endif
6919
6920 return ret;
6921 }
6922 \f
6923 #define PPC_LO(v) ((v) & 0xffff)
6924 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6925 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6926
6927 /* Finish up dynamic symbol handling. We set the contents of various
6928 dynamic sections here. */
6929
6930 static bfd_boolean
6931 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6932 struct bfd_link_info *info,
6933 struct elf_link_hash_entry *h,
6934 Elf_Internal_Sym *sym)
6935 {
6936 struct ppc_elf_link_hash_table *htab;
6937 struct plt_entry *ent;
6938 bfd_boolean doneone;
6939
6940 #ifdef DEBUG
6941 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6942 h->root.root.string);
6943 #endif
6944
6945 htab = ppc_elf_hash_table (info);
6946 BFD_ASSERT (htab->elf.dynobj != NULL);
6947
6948 doneone = FALSE;
6949 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6950 if (ent->plt.offset != (bfd_vma) -1)
6951 {
6952 if (!doneone)
6953 {
6954 Elf_Internal_Rela rela;
6955 bfd_byte *loc;
6956 bfd_vma reloc_index;
6957
6958 if (htab->plt_type == PLT_NEW)
6959 reloc_index = ent->plt.offset / 4;
6960 else
6961 {
6962 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6963 / htab->plt_slot_size);
6964 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6965 && htab->plt_type == PLT_OLD)
6966 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6967 }
6968
6969 /* This symbol has an entry in the procedure linkage table.
6970 Set it up. */
6971 if (htab->plt_type == PLT_VXWORKS)
6972 {
6973 bfd_vma got_offset;
6974 const bfd_vma *plt_entry;
6975
6976 /* The first three entries in .got.plt are reserved. */
6977 got_offset = (reloc_index + 3) * 4;
6978
6979 /* Use the right PLT. */
6980 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6981 : ppc_elf_vxworks_plt_entry;
6982
6983 /* Fill in the .plt on VxWorks. */
6984 if (info->shared)
6985 {
6986 bfd_vma got_offset_hi = (got_offset >> 16)
6987 + ((got_offset & 0x8000) >> 15);
6988
6989 bfd_put_32 (output_bfd,
6990 plt_entry[0] | (got_offset_hi & 0xffff),
6991 htab->plt->contents + ent->plt.offset + 0);
6992 bfd_put_32 (output_bfd,
6993 plt_entry[1] | (got_offset & 0xffff),
6994 htab->plt->contents + ent->plt.offset + 4);
6995 }
6996 else
6997 {
6998 bfd_vma got_loc
6999 = (got_offset
7000 + htab->elf.hgot->root.u.def.value
7001 + htab->elf.hgot->root.u.def.section->output_offset
7002 + htab->elf.hgot->root.u.def.section->output_section->vma);
7003 bfd_vma got_loc_hi = (got_loc >> 16)
7004 + ((got_loc & 0x8000) >> 15);
7005
7006 bfd_put_32 (output_bfd,
7007 plt_entry[0] | (got_loc_hi & 0xffff),
7008 htab->plt->contents + ent->plt.offset + 0);
7009 bfd_put_32 (output_bfd,
7010 plt_entry[1] | (got_loc & 0xffff),
7011 htab->plt->contents + ent->plt.offset + 4);
7012 }
7013
7014 bfd_put_32 (output_bfd, plt_entry[2],
7015 htab->plt->contents + ent->plt.offset + 8);
7016 bfd_put_32 (output_bfd, plt_entry[3],
7017 htab->plt->contents + ent->plt.offset + 12);
7018
7019 /* This instruction is an immediate load. The value loaded is
7020 the byte offset of the R_PPC_JMP_SLOT relocation from the
7021 start of the .rela.plt section. The value is stored in the
7022 low-order 16 bits of the load instruction. */
7023 /* NOTE: It appears that this is now an index rather than a
7024 prescaled offset. */
7025 bfd_put_32 (output_bfd,
7026 plt_entry[4] | reloc_index,
7027 htab->plt->contents + ent->plt.offset + 16);
7028 /* This instruction is a PC-relative branch whose target is
7029 the start of the PLT section. The address of this branch
7030 instruction is 20 bytes beyond the start of this PLT entry.
7031 The address is encoded in bits 6-29, inclusive. The value
7032 stored is right-shifted by two bits, permitting a 26-bit
7033 offset. */
7034 bfd_put_32 (output_bfd,
7035 (plt_entry[5]
7036 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7037 htab->plt->contents + ent->plt.offset + 20);
7038 bfd_put_32 (output_bfd, plt_entry[6],
7039 htab->plt->contents + ent->plt.offset + 24);
7040 bfd_put_32 (output_bfd, plt_entry[7],
7041 htab->plt->contents + ent->plt.offset + 28);
7042
7043 /* Fill in the GOT entry corresponding to this PLT slot with
7044 the address immediately after the the "bctr" instruction
7045 in this PLT entry. */
7046 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7047 + htab->plt->output_offset
7048 + ent->plt.offset + 16),
7049 htab->sgotplt->contents + got_offset);
7050
7051 if (!info->shared)
7052 {
7053 /* Fill in a couple of entries in .rela.plt.unloaded. */
7054 loc = htab->srelplt2->contents
7055 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7056 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7057 * sizeof (Elf32_External_Rela));
7058
7059 /* Provide the @ha relocation for the first instruction. */
7060 rela.r_offset = (htab->plt->output_section->vma
7061 + htab->plt->output_offset
7062 + ent->plt.offset + 2);
7063 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7064 R_PPC_ADDR16_HA);
7065 rela.r_addend = got_offset;
7066 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7067 loc += sizeof (Elf32_External_Rela);
7068
7069 /* Provide the @l relocation for the second instruction. */
7070 rela.r_offset = (htab->plt->output_section->vma
7071 + htab->plt->output_offset
7072 + ent->plt.offset + 6);
7073 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7074 R_PPC_ADDR16_LO);
7075 rela.r_addend = got_offset;
7076 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7077 loc += sizeof (Elf32_External_Rela);
7078
7079 /* Provide a relocation for the GOT entry corresponding to this
7080 PLT slot. Point it at the middle of the .plt entry. */
7081 rela.r_offset = (htab->sgotplt->output_section->vma
7082 + htab->sgotplt->output_offset
7083 + got_offset);
7084 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7085 R_PPC_ADDR32);
7086 rela.r_addend = ent->plt.offset + 16;
7087 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7088 }
7089
7090 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7091 In particular, the offset for the relocation is not the
7092 address of the PLT entry for this function, as specified
7093 by the ABI. Instead, the offset is set to the address of
7094 the GOT slot for this function. See EABI 4.4.4.1. */
7095 rela.r_offset = (htab->sgotplt->output_section->vma
7096 + htab->sgotplt->output_offset
7097 + got_offset);
7098
7099 }
7100 else
7101 {
7102 rela.r_offset = (htab->plt->output_section->vma
7103 + htab->plt->output_offset
7104 + ent->plt.offset);
7105 if (htab->plt_type == PLT_OLD)
7106 {
7107 /* We don't need to fill in the .plt. The ppc dynamic
7108 linker will fill it in. */
7109 }
7110 else
7111 {
7112 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7113 + htab->glink->output_section->vma
7114 + htab->glink->output_offset);
7115 bfd_put_32 (output_bfd, val,
7116 htab->plt->contents + ent->plt.offset);
7117 }
7118 }
7119
7120 /* Fill in the entry in the .rela.plt section. */
7121 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7122 rela.r_addend = 0;
7123
7124 loc = (htab->relplt->contents
7125 + reloc_index * sizeof (Elf32_External_Rela));
7126 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7127
7128 if (!h->def_regular)
7129 {
7130 /* Mark the symbol as undefined, rather than as defined in
7131 the .plt section. Leave the value alone. */
7132 sym->st_shndx = SHN_UNDEF;
7133 /* If the symbol is weak, we do need to clear the value.
7134 Otherwise, the PLT entry would provide a definition for
7135 the symbol even if the symbol wasn't defined anywhere,
7136 and so the symbol would never be NULL. */
7137 if (!h->ref_regular_nonweak)
7138 sym->st_value = 0;
7139 }
7140 doneone = TRUE;
7141 }
7142
7143 if (htab->plt_type == PLT_NEW)
7144 {
7145 bfd_vma plt;
7146 unsigned char *p;
7147
7148 plt = (ent->plt.offset
7149 + htab->plt->output_section->vma
7150 + htab->plt->output_offset);
7151 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7152
7153 if (info->shared || info->pie)
7154 {
7155 bfd_vma got = 0;
7156
7157 if (ent->addend >= 32768)
7158 got = (ent->addend
7159 + ent->sec->output_section->vma
7160 + ent->sec->output_offset);
7161 else if (htab->elf.hgot != NULL)
7162 got = (htab->elf.hgot->root.u.def.value
7163 + htab->elf.hgot->root.u.def.section->output_section->vma
7164 + htab->elf.hgot->root.u.def.section->output_offset);
7165
7166 plt -= got;
7167
7168 if (plt + 0x8000 < 0x10000)
7169 {
7170 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7171 p += 4;
7172 bfd_put_32 (output_bfd, MTCTR_11, p);
7173 p += 4;
7174 bfd_put_32 (output_bfd, BCTR, p);
7175 p += 4;
7176 bfd_put_32 (output_bfd, NOP, p);
7177 p += 4;
7178 }
7179 else
7180 {
7181 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7182 p += 4;
7183 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7184 p += 4;
7185 bfd_put_32 (output_bfd, MTCTR_11, p);
7186 p += 4;
7187 bfd_put_32 (output_bfd, BCTR, p);
7188 p += 4;
7189 }
7190 }
7191 else
7192 {
7193 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7194 p += 4;
7195 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7196 p += 4;
7197 bfd_put_32 (output_bfd, MTCTR_11, p);
7198 p += 4;
7199 bfd_put_32 (output_bfd, BCTR, p);
7200 p += 4;
7201
7202 /* We only need one non-PIC glink stub. */
7203 break;
7204 }
7205 }
7206 else
7207 break;
7208 }
7209
7210 if (h->needs_copy)
7211 {
7212 asection *s;
7213 Elf_Internal_Rela rela;
7214 bfd_byte *loc;
7215
7216 /* This symbols needs a copy reloc. Set it up. */
7217
7218 #ifdef DEBUG
7219 fprintf (stderr, ", copy");
7220 #endif
7221
7222 BFD_ASSERT (h->dynindx != -1);
7223
7224 if (ppc_elf_hash_entry (h)->has_sda_refs)
7225 s = htab->relsbss;
7226 else
7227 s = htab->relbss;
7228 BFD_ASSERT (s != NULL);
7229
7230 rela.r_offset = (h->root.u.def.value
7231 + h->root.u.def.section->output_section->vma
7232 + h->root.u.def.section->output_offset);
7233 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7234 rela.r_addend = 0;
7235 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7236 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7237 }
7238
7239 #ifdef DEBUG
7240 fprintf (stderr, "\n");
7241 #endif
7242
7243 /* Mark some specially defined symbols as absolute. */
7244 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7245 || (!htab->is_vxworks
7246 && (h == htab->elf.hgot
7247 || strcmp (h->root.root.string,
7248 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7249 sym->st_shndx = SHN_ABS;
7250
7251 return TRUE;
7252 }
7253 \f
7254 static enum elf_reloc_type_class
7255 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7256 {
7257 switch (ELF32_R_TYPE (rela->r_info))
7258 {
7259 case R_PPC_RELATIVE:
7260 return reloc_class_relative;
7261 case R_PPC_REL24:
7262 case R_PPC_ADDR24:
7263 case R_PPC_JMP_SLOT:
7264 return reloc_class_plt;
7265 case R_PPC_COPY:
7266 return reloc_class_copy;
7267 default:
7268 return reloc_class_normal;
7269 }
7270 }
7271 \f
7272 /* Finish up the dynamic sections. */
7273
7274 static bfd_boolean
7275 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7276 struct bfd_link_info *info)
7277 {
7278 asection *sdyn;
7279 asection *splt;
7280 struct ppc_elf_link_hash_table *htab;
7281 bfd_vma got;
7282 bfd * dynobj;
7283
7284 #ifdef DEBUG
7285 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7286 #endif
7287
7288 htab = ppc_elf_hash_table (info);
7289 dynobj = elf_hash_table (info)->dynobj;
7290 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7291 if (htab->is_vxworks)
7292 splt = bfd_get_section_by_name (dynobj, ".plt");
7293 else
7294 splt = NULL;
7295
7296 got = 0;
7297 if (htab->elf.hgot != NULL)
7298 got = (htab->elf.hgot->root.u.def.value
7299 + htab->elf.hgot->root.u.def.section->output_section->vma
7300 + htab->elf.hgot->root.u.def.section->output_offset);
7301
7302 if (htab->elf.dynamic_sections_created)
7303 {
7304 Elf32_External_Dyn *dyncon, *dynconend;
7305
7306 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7307
7308 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7309 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7310 for (; dyncon < dynconend; dyncon++)
7311 {
7312 Elf_Internal_Dyn dyn;
7313 asection *s;
7314
7315 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7316
7317 switch (dyn.d_tag)
7318 {
7319 case DT_PLTGOT:
7320 if (htab->is_vxworks)
7321 s = htab->sgotplt;
7322 else
7323 s = htab->plt;
7324 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7325 break;
7326
7327 case DT_PLTRELSZ:
7328 dyn.d_un.d_val = htab->relplt->size;
7329 break;
7330
7331 case DT_JMPREL:
7332 s = htab->relplt;
7333 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7334 break;
7335
7336 case DT_PPC_GOT:
7337 dyn.d_un.d_ptr = got;
7338 break;
7339
7340 case DT_RELASZ:
7341 if (htab->is_vxworks)
7342 {
7343 if (htab->relplt)
7344 dyn.d_un.d_ptr -= htab->relplt->size;
7345 break;
7346 }
7347 continue;
7348
7349 default:
7350 if (htab->is_vxworks
7351 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7352 break;
7353 continue;
7354 }
7355
7356 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7357 }
7358 }
7359
7360 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7361 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7362 if (htab->got != NULL)
7363 {
7364 unsigned char *p = htab->got->contents;
7365 bfd_vma val;
7366
7367 p += htab->elf.hgot->root.u.def.value;
7368 if (htab->plt_type == PLT_OLD)
7369 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7370
7371 val = 0;
7372 if (sdyn != NULL)
7373 val = sdyn->output_section->vma + sdyn->output_offset;
7374 bfd_put_32 (output_bfd, val, p);
7375
7376 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7377 }
7378
7379 /* Fill in the first entry in the VxWorks procedure linkage table. */
7380 if (splt && splt->size > 0)
7381 {
7382 /* Use the right PLT. */
7383 static const bfd_vma *plt_entry = NULL;
7384 plt_entry = info->shared ?
7385 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7386
7387 if (!info->shared)
7388 {
7389 bfd_vma got_value =
7390 (htab->elf.hgot->root.u.def.section->output_section->vma
7391 + htab->elf.hgot->root.u.def.section->output_offset
7392 + htab->elf.hgot->root.u.def.value);
7393 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7394
7395 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7396 splt->contents + 0);
7397 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7398 splt->contents + 4);
7399 }
7400 else
7401 {
7402 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7403 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7404 }
7405 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7406 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7407 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7408 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7409 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7410 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7411
7412 if (! info->shared)
7413 {
7414 Elf_Internal_Rela rela;
7415 bfd_byte *loc;
7416
7417 loc = htab->srelplt2->contents;
7418
7419 /* Output the @ha relocation for the first instruction. */
7420 rela.r_offset = (htab->plt->output_section->vma
7421 + htab->plt->output_offset
7422 + 2);
7423 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7424 rela.r_addend = 0;
7425 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7426 loc += sizeof (Elf32_External_Rela);
7427
7428 /* Output the @l relocation for the second instruction. */
7429 rela.r_offset = (htab->plt->output_section->vma
7430 + htab->plt->output_offset
7431 + 6);
7432 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7433 rela.r_addend = 0;
7434 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7435 loc += sizeof (Elf32_External_Rela);
7436
7437 /* Fix up the remaining relocations. They may have the wrong
7438 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7439 in which symbols were output. */
7440 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7441 {
7442 Elf_Internal_Rela rel;
7443
7444 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7445 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7446 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7447 loc += sizeof (Elf32_External_Rela);
7448
7449 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7450 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7451 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7452 loc += sizeof (Elf32_External_Rela);
7453
7454 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7455 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7456 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7457 loc += sizeof (Elf32_External_Rela);
7458 }
7459 }
7460 }
7461
7462 if (htab->glink != NULL && htab->glink->contents != NULL)
7463 {
7464 unsigned char *p;
7465 unsigned char *endp;
7466 bfd_vma res0;
7467 unsigned int i;
7468
7469 /*
7470 * PIC glink code is the following:
7471 *
7472 * # ith PLT code stub.
7473 * addis 11,30,(plt+(i-1)*4-got)@ha
7474 * lwz 11,(plt+(i-1)*4-got)@l(11)
7475 * mtctr 11
7476 * bctr
7477 *
7478 * # A table of branches, one for each plt entry.
7479 * # The idea is that the plt call stub loads ctr (and r11) with these
7480 * # addresses, so (r11 - res_0) gives the plt index * 4.
7481 * res_0: b PLTresolve
7482 * res_1: b PLTresolve
7483 * .
7484 * # Some number of entries towards the end can be nops
7485 * res_n_m3: nop
7486 * res_n_m2: nop
7487 * res_n_m1:
7488 *
7489 * PLTresolve:
7490 * addis 11,11,(1f-res_0)@ha
7491 * mflr 0
7492 * bcl 20,31,1f
7493 * 1: addi 11,11,(1b-res_0)@l
7494 * mflr 12
7495 * mtlr 0
7496 * sub 11,11,12 # r11 = index * 4
7497 * addis 12,12,(got+4-1b)@ha
7498 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7499 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7500 * mtctr 0
7501 * add 0,11,11
7502 * add 11,0,11 # r11 = index * 12 = reloc offset.
7503 * bctr
7504 */
7505 static const unsigned int pic_plt_resolve[] =
7506 {
7507 ADDIS_11_11,
7508 MFLR_0,
7509 BCL_20_31,
7510 ADDI_11_11,
7511 MFLR_12,
7512 MTLR_0,
7513 SUB_11_11_12,
7514 ADDIS_12_12,
7515 LWZ_0_12,
7516 LWZ_12_12,
7517 MTCTR_0,
7518 ADD_0_11_11,
7519 ADD_11_0_11,
7520 BCTR,
7521 NOP,
7522 NOP
7523 };
7524
7525 static const unsigned int plt_resolve[] =
7526 {
7527 LIS_12,
7528 ADDIS_11_11,
7529 LWZ_0_12,
7530 ADDI_11_11,
7531 MTCTR_0,
7532 ADD_0_11_11,
7533 LWZ_12_12,
7534 ADD_11_0_11,
7535 BCTR,
7536 NOP,
7537 NOP,
7538 NOP,
7539 NOP,
7540 NOP,
7541 NOP,
7542 NOP
7543 };
7544
7545 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7546 abort ();
7547 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7548 abort ();
7549
7550 /* Build the branch table, one for each plt entry (less one),
7551 and perhaps some padding. */
7552 p = htab->glink->contents;
7553 p += htab->glink_pltresolve;
7554 endp = htab->glink->contents;
7555 endp += htab->glink->size - GLINK_PLTRESOLVE;
7556 while (p < endp - 8 * 4)
7557 {
7558 bfd_put_32 (output_bfd, B + endp - p, p);
7559 p += 4;
7560 }
7561 while (p < endp)
7562 {
7563 bfd_put_32 (output_bfd, NOP, p);
7564 p += 4;
7565 }
7566
7567 res0 = (htab->glink_pltresolve
7568 + htab->glink->output_section->vma
7569 + htab->glink->output_offset);
7570
7571 /* Last comes the PLTresolve stub. */
7572 if (info->shared || info->pie)
7573 {
7574 bfd_vma bcl;
7575
7576 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7577 {
7578 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7579 p += 4;
7580 }
7581 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7582
7583 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7584 + htab->glink->output_section->vma
7585 + htab->glink->output_offset);
7586
7587 bfd_put_32 (output_bfd,
7588 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7589 bfd_put_32 (output_bfd,
7590 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7591 bfd_put_32 (output_bfd,
7592 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7593 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7594 {
7595 bfd_put_32 (output_bfd,
7596 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7597 bfd_put_32 (output_bfd,
7598 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7599 }
7600 else
7601 {
7602 bfd_put_32 (output_bfd,
7603 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7604 bfd_put_32 (output_bfd,
7605 LWZ_12_12 + 4, p + 9*4);
7606 }
7607 }
7608 else
7609 {
7610 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7611 {
7612 bfd_put_32 (output_bfd, plt_resolve[i], p);
7613 p += 4;
7614 }
7615 p -= 4 * ARRAY_SIZE (plt_resolve);
7616
7617 bfd_put_32 (output_bfd,
7618 LIS_12 + PPC_HA (got + 4), p + 0*4);
7619 bfd_put_32 (output_bfd,
7620 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7621 bfd_put_32 (output_bfd,
7622 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7623 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7624 {
7625 bfd_put_32 (output_bfd,
7626 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7627 bfd_put_32 (output_bfd,
7628 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7629 }
7630 else
7631 {
7632 bfd_put_32 (output_bfd,
7633 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7634 bfd_put_32 (output_bfd,
7635 LWZ_12_12 + 4, p + 6*4);
7636 }
7637 }
7638 }
7639
7640 return TRUE;
7641 }
7642 \f
7643 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7644 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7645 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7646 #define TARGET_BIG_NAME "elf32-powerpc"
7647 #define ELF_ARCH bfd_arch_powerpc
7648 #define ELF_MACHINE_CODE EM_PPC
7649 #ifdef __QNXTARGET__
7650 #define ELF_MAXPAGESIZE 0x1000
7651 #else
7652 #define ELF_MAXPAGESIZE 0x10000
7653 #endif
7654 #define ELF_MINPAGESIZE 0x1000
7655 #define ELF_COMMONPAGESIZE 0x1000
7656 #define elf_info_to_howto ppc_elf_info_to_howto
7657
7658 #ifdef EM_CYGNUS_POWERPC
7659 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7660 #endif
7661
7662 #ifdef EM_PPC_OLD
7663 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7664 #endif
7665
7666 #define elf_backend_plt_not_loaded 1
7667 #define elf_backend_can_gc_sections 1
7668 #define elf_backend_can_refcount 1
7669 #define elf_backend_rela_normal 1
7670
7671 #define bfd_elf32_mkobject ppc_elf_mkobject
7672 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7673 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7674 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7675 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7676 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7677 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7678
7679 #define elf_backend_object_p ppc_elf_object_p
7680 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7681 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7682 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7683 #define elf_backend_relocate_section ppc_elf_relocate_section
7684 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7685 #define elf_backend_check_relocs ppc_elf_check_relocs
7686 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7687 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7688 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7689 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7690 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7691 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7692 #define elf_backend_fake_sections ppc_elf_fake_sections
7693 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7694 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7695 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7696 #define elf_backend_write_core_note ppc_elf_write_core_note
7697 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7698 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7699 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7700 #define elf_backend_write_section ppc_elf_write_section
7701 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7702 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7703 #define elf_backend_action_discarded ppc_elf_action_discarded
7704 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7705
7706 #include "elf32-target.h"
7707
7708 /* VxWorks Target */
7709
7710 #undef TARGET_LITTLE_SYM
7711 #undef TARGET_LITTLE_NAME
7712
7713 #undef TARGET_BIG_SYM
7714 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7715 #undef TARGET_BIG_NAME
7716 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7717
7718 /* VxWorks uses the elf default section flags for .plt. */
7719 static const struct bfd_elf_special_section *
7720 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7721 {
7722 if (sec->name == NULL)
7723 return NULL;
7724
7725 if (strcmp (sec->name, ".plt") == 0)
7726 return _bfd_elf_get_sec_type_attr (abfd, sec);
7727
7728 return ppc_elf_get_sec_type_attr (abfd, sec);
7729 }
7730
7731 /* Like ppc_elf_link_hash_table_create, but overrides
7732 appropriately for VxWorks. */
7733 static struct bfd_link_hash_table *
7734 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7735 {
7736 struct bfd_link_hash_table *ret;
7737
7738 ret = ppc_elf_link_hash_table_create (abfd);
7739 if (ret)
7740 {
7741 struct ppc_elf_link_hash_table *htab
7742 = (struct ppc_elf_link_hash_table *)ret;
7743 htab->is_vxworks = 1;
7744 htab->plt_type = PLT_VXWORKS;
7745 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7746 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7747 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7748 }
7749 return ret;
7750 }
7751
7752 /* Tweak magic VxWorks symbols as they are loaded. */
7753 static bfd_boolean
7754 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7755 struct bfd_link_info *info,
7756 Elf_Internal_Sym *sym,
7757 const char **namep ATTRIBUTE_UNUSED,
7758 flagword *flagsp ATTRIBUTE_UNUSED,
7759 asection **secp,
7760 bfd_vma *valp)
7761 {
7762 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7763 valp))
7764 return FALSE;
7765
7766 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7767 }
7768
7769 static void
7770 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7771 {
7772 ppc_elf_final_write_processing(abfd, linker);
7773 elf_vxworks_final_write_processing(abfd, linker);
7774 }
7775
7776 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7777 define it. */
7778 #undef elf_backend_want_plt_sym
7779 #define elf_backend_want_plt_sym 1
7780 #undef elf_backend_want_got_plt
7781 #define elf_backend_want_got_plt 1
7782 #undef elf_backend_got_symbol_offset
7783 #define elf_backend_got_symbol_offset 0
7784 #undef elf_backend_plt_not_loaded
7785 #define elf_backend_plt_not_loaded 0
7786 #undef elf_backend_plt_readonly
7787 #define elf_backend_plt_readonly 1
7788 #undef elf_backend_got_header_size
7789 #define elf_backend_got_header_size 12
7790
7791 #undef bfd_elf32_bfd_link_hash_table_create
7792 #define bfd_elf32_bfd_link_hash_table_create \
7793 ppc_elf_vxworks_link_hash_table_create
7794 #undef elf_backend_add_symbol_hook
7795 #define elf_backend_add_symbol_hook \
7796 ppc_elf_vxworks_add_symbol_hook
7797 #undef elf_backend_link_output_symbol_hook
7798 #define elf_backend_link_output_symbol_hook \
7799 elf_vxworks_link_output_symbol_hook
7800 #undef elf_backend_final_write_processing
7801 #define elf_backend_final_write_processing \
7802 ppc_elf_vxworks_final_write_processing
7803 #undef elf_backend_get_sec_type_attr
7804 #define elf_backend_get_sec_type_attr \
7805 ppc_elf_vxworks_get_sec_type_attr
7806 #undef elf_backend_emit_relocs
7807 #define elf_backend_emit_relocs \
7808 elf_vxworks_emit_relocs
7809
7810 #undef elf32_bed
7811 #define elf32_bed ppc_elf_vxworks_bed
7812
7813 #include "elf32-target.h"
GDB Binutils - Deliverables
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