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[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
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 /* Override the generic function because we store some extras. */
1740
1741 static bfd_boolean
1742 ppc_elf_mkobject (bfd *abfd)
1743 {
1744 if (abfd->tdata.any == NULL)
1745 {
1746 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1747 abfd->tdata.any = bfd_zalloc (abfd, amt);
1748 if (abfd->tdata.any == NULL)
1749 return FALSE;
1750 }
1751 return bfd_elf_mkobject (abfd);
1752 }
1753
1754 /* Fix bad default arch selected for a 32 bit input bfd when the
1755 default is 64 bit. */
1756
1757 static bfd_boolean
1758 ppc_elf_object_p (bfd *abfd)
1759 {
1760 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1761 {
1762 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1763
1764 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1765 {
1766 /* Relies on arch after 64 bit default being 32 bit default. */
1767 abfd->arch_info = abfd->arch_info->next;
1768 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1769 }
1770 }
1771 return TRUE;
1772 }
1773
1774 /* Function to set whether a module needs the -mrelocatable bit set. */
1775
1776 static bfd_boolean
1777 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1778 {
1779 BFD_ASSERT (!elf_flags_init (abfd)
1780 || elf_elfheader (abfd)->e_flags == flags);
1781
1782 elf_elfheader (abfd)->e_flags = flags;
1783 elf_flags_init (abfd) = TRUE;
1784 return TRUE;
1785 }
1786
1787 /* Support for core dump NOTE sections. */
1788
1789 static bfd_boolean
1790 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1791 {
1792 int offset;
1793 unsigned int size;
1794
1795 switch (note->descsz)
1796 {
1797 default:
1798 return FALSE;
1799
1800 case 268: /* Linux/PPC. */
1801 /* pr_cursig */
1802 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1803
1804 /* pr_pid */
1805 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1806
1807 /* pr_reg */
1808 offset = 72;
1809 size = 192;
1810
1811 break;
1812 }
1813
1814 /* Make a ".reg/999" section. */
1815 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1816 size, note->descpos + offset);
1817 }
1818
1819 static bfd_boolean
1820 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1821 {
1822 switch (note->descsz)
1823 {
1824 default:
1825 return FALSE;
1826
1827 case 128: /* Linux/PPC elf_prpsinfo. */
1828 elf_tdata (abfd)->core_program
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1830 elf_tdata (abfd)->core_command
1831 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1832 }
1833
1834 /* Note that for some reason, a spurious space is tacked
1835 onto the end of the args in some (at least one anyway)
1836 implementations, so strip it off if it exists. */
1837
1838 {
1839 char *command = elf_tdata (abfd)->core_command;
1840 int n = strlen (command);
1841
1842 if (0 < n && command[n - 1] == ' ')
1843 command[n - 1] = '\0';
1844 }
1845
1846 return TRUE;
1847 }
1848
1849 static char *
1850 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1851 {
1852 switch (note_type)
1853 {
1854 default:
1855 return NULL;
1856
1857 case NT_PRPSINFO:
1858 {
1859 char data[128];
1860 va_list ap;
1861
1862 va_start (ap, note_type);
1863 memset (data, 0, 32);
1864 strncpy (data + 32, va_arg (ap, const char *), 16);
1865 strncpy (data + 48, va_arg (ap, const char *), 80);
1866 va_end (ap);
1867 return elfcore_write_note (abfd, buf, bufsiz,
1868 "CORE", note_type, data, sizeof (data));
1869 }
1870
1871 case NT_PRSTATUS:
1872 {
1873 char data[268];
1874 va_list ap;
1875 long pid;
1876 int cursig;
1877 const void *greg;
1878
1879 va_start (ap, note_type);
1880 memset (data, 0, 72);
1881 pid = va_arg (ap, long);
1882 bfd_put_32 (abfd, pid, data + 24);
1883 cursig = va_arg (ap, int);
1884 bfd_put_16 (abfd, cursig, data + 12);
1885 greg = va_arg (ap, const void *);
1886 memcpy (data + 72, greg, 192);
1887 memset (data + 264, 0, 4);
1888 va_end (ap);
1889 return elfcore_write_note (abfd, buf, bufsiz,
1890 "CORE", note_type, data, sizeof (data));
1891 }
1892 }
1893 }
1894
1895 /* Return address for Ith PLT stub in section PLT, for relocation REL
1896 or (bfd_vma) -1 if it should not be included. */
1897
1898 static bfd_vma
1899 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1900 const asection *plt ATTRIBUTE_UNUSED,
1901 const arelent *rel)
1902 {
1903 return rel->address;
1904 }
1905
1906 /* Handle a PowerPC specific section when reading an object file. This
1907 is called when bfd_section_from_shdr finds a section with an unknown
1908 type. */
1909
1910 static bfd_boolean
1911 ppc_elf_section_from_shdr (bfd *abfd,
1912 Elf_Internal_Shdr *hdr,
1913 const char *name,
1914 int shindex)
1915 {
1916 asection *newsect;
1917 flagword flags;
1918
1919 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1920 return FALSE;
1921
1922 newsect = hdr->bfd_section;
1923 flags = bfd_get_section_flags (abfd, newsect);
1924 if (hdr->sh_flags & SHF_EXCLUDE)
1925 flags |= SEC_EXCLUDE;
1926
1927 if (hdr->sh_type == SHT_ORDERED)
1928 flags |= SEC_SORT_ENTRIES;
1929
1930 bfd_set_section_flags (abfd, newsect, flags);
1931 return TRUE;
1932 }
1933
1934 /* Set up any other section flags and such that may be necessary. */
1935
1936 static bfd_boolean
1937 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1938 Elf_Internal_Shdr *shdr,
1939 asection *asect)
1940 {
1941 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1942 shdr->sh_flags |= SHF_EXCLUDE;
1943
1944 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1945 shdr->sh_type = SHT_ORDERED;
1946
1947 return TRUE;
1948 }
1949
1950 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1951 need to bump up the number of section headers. */
1952
1953 static int
1954 ppc_elf_additional_program_headers (bfd *abfd,
1955 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1956 {
1957 asection *s;
1958 int ret = 0;
1959
1960 s = bfd_get_section_by_name (abfd, ".sbss2");
1961 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1962 ++ret;
1963
1964 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1965 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1966 ++ret;
1967
1968 return ret;
1969 }
1970
1971 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1972 .PPC.EMB.sbss0 a normal section, and not a bss section so
1973 that the linker doesn't crater when trying to make more than
1974 2 sections. */
1975
1976 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1977 {
1978 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1979 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1982 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1983 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1985 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1986 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1987 { NULL, 0, 0, 0, 0 }
1988 };
1989
1990 /* This is what we want for new plt/got. */
1991 static struct bfd_elf_special_section ppc_alt_plt =
1992 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1993
1994 static const struct bfd_elf_special_section *
1995 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1996 {
1997 const struct bfd_elf_special_section *ssect;
1998
1999 /* See if this is one of the special sections. */
2000 if (sec->name == NULL)
2001 return NULL;
2002
2003 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2004 sec->use_rela_p);
2005 if (ssect != NULL)
2006 {
2007 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2008 ssect = &ppc_alt_plt;
2009 return ssect;
2010 }
2011
2012 return _bfd_elf_get_sec_type_attr (abfd, sec);
2013 }
2014 \f
2015 /* Very simple linked list structure for recording apuinfo values. */
2016 typedef struct apuinfo_list
2017 {
2018 struct apuinfo_list *next;
2019 unsigned long value;
2020 }
2021 apuinfo_list;
2022
2023 static apuinfo_list *head;
2024
2025
2026 static void
2027 apuinfo_list_init (void)
2028 {
2029 head = NULL;
2030 }
2031
2032 static void
2033 apuinfo_list_add (unsigned long value)
2034 {
2035 apuinfo_list *entry = head;
2036
2037 while (entry != NULL)
2038 {
2039 if (entry->value == value)
2040 return;
2041 entry = entry->next;
2042 }
2043
2044 entry = bfd_malloc (sizeof (* entry));
2045 if (entry == NULL)
2046 return;
2047
2048 entry->value = value;
2049 entry->next = head;
2050 head = entry;
2051 }
2052
2053 static unsigned
2054 apuinfo_list_length (void)
2055 {
2056 apuinfo_list *entry;
2057 unsigned long count;
2058
2059 for (entry = head, count = 0;
2060 entry;
2061 entry = entry->next)
2062 ++ count;
2063
2064 return count;
2065 }
2066
2067 static inline unsigned long
2068 apuinfo_list_element (unsigned long number)
2069 {
2070 apuinfo_list * entry;
2071
2072 for (entry = head;
2073 entry && number --;
2074 entry = entry->next)
2075 ;
2076
2077 return entry ? entry->value : 0;
2078 }
2079
2080 static void
2081 apuinfo_list_finish (void)
2082 {
2083 apuinfo_list *entry;
2084
2085 for (entry = head; entry;)
2086 {
2087 apuinfo_list *next = entry->next;
2088 free (entry);
2089 entry = next;
2090 }
2091
2092 head = NULL;
2093 }
2094
2095 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2096 #define APUINFO_LABEL "APUinfo"
2097
2098 /* Scan the input BFDs and create a linked list of
2099 the APUinfo values that will need to be emitted. */
2100
2101 static void
2102 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2103 {
2104 bfd *ibfd;
2105 asection *asec;
2106 char *buffer;
2107 unsigned num_input_sections;
2108 bfd_size_type output_section_size;
2109 unsigned i;
2110 unsigned num_entries;
2111 unsigned long offset;
2112 unsigned long length;
2113 const char *error_message = NULL;
2114
2115 if (link_info == NULL)
2116 return;
2117
2118 /* Scan the input bfds, looking for apuinfo sections. */
2119 num_input_sections = 0;
2120 output_section_size = 0;
2121
2122 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2123 {
2124 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2125 if (asec)
2126 {
2127 ++ num_input_sections;
2128 output_section_size += asec->size;
2129 }
2130 }
2131
2132 /* We need at least one input sections
2133 in order to make merging worthwhile. */
2134 if (num_input_sections < 1)
2135 return;
2136
2137 /* Just make sure that the output section exists as well. */
2138 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2139 if (asec == NULL)
2140 return;
2141
2142 /* Allocate a buffer for the contents of the input sections. */
2143 buffer = bfd_malloc (output_section_size);
2144 if (buffer == NULL)
2145 return;
2146
2147 offset = 0;
2148 apuinfo_list_init ();
2149
2150 /* Read in the input sections contents. */
2151 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2152 {
2153 unsigned long datum;
2154 char *ptr;
2155
2156 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2157 if (asec == NULL)
2158 continue;
2159
2160 length = asec->size;
2161 if (length < 24)
2162 {
2163 error_message = _("corrupt or empty %s section in %B");
2164 goto fail;
2165 }
2166
2167 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2168 || (bfd_bread (buffer + offset, length, ibfd) != length))
2169 {
2170 error_message = _("unable to read in %s section from %B");
2171 goto fail;
2172 }
2173
2174 /* Process the contents of the section. */
2175 ptr = buffer + offset;
2176 error_message = _("corrupt %s section in %B");
2177
2178 /* Verify the contents of the header. Note - we have to
2179 extract the values this way in order to allow for a
2180 host whose endian-ness is different from the target. */
2181 datum = bfd_get_32 (ibfd, ptr);
2182 if (datum != sizeof APUINFO_LABEL)
2183 goto fail;
2184
2185 datum = bfd_get_32 (ibfd, ptr + 8);
2186 if (datum != 0x2)
2187 goto fail;
2188
2189 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2190 goto fail;
2191
2192 /* Get the number of bytes used for apuinfo entries. */
2193 datum = bfd_get_32 (ibfd, ptr + 4);
2194 if (datum + 20 != length)
2195 goto fail;
2196
2197 /* Make sure that we do not run off the end of the section. */
2198 if (offset + length > output_section_size)
2199 goto fail;
2200
2201 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2202 for (i = 0; i < datum; i += 4)
2203 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2204
2205 /* Update the offset. */
2206 offset += length;
2207 }
2208
2209 error_message = NULL;
2210
2211 /* Compute the size of the output section. */
2212 num_entries = apuinfo_list_length ();
2213 output_section_size = 20 + num_entries * 4;
2214
2215 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2216
2217 if (! bfd_set_section_size (abfd, asec, output_section_size))
2218 ibfd = abfd,
2219 error_message = _("warning: unable to set size of %s section in %B");
2220
2221 fail:
2222 free (buffer);
2223
2224 if (error_message)
2225 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2226 }
2227
2228 /* Prevent the output section from accumulating the input sections'
2229 contents. We have already stored this in our linked list structure. */
2230
2231 static bfd_boolean
2232 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2233 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2234 asection *asec,
2235 bfd_byte *contents ATTRIBUTE_UNUSED)
2236 {
2237 return (apuinfo_list_length ()
2238 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2239 }
2240
2241 /* Finally we can generate the output section. */
2242
2243 static void
2244 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2245 {
2246 bfd_byte *buffer;
2247 asection *asec;
2248 unsigned i;
2249 unsigned num_entries;
2250 bfd_size_type length;
2251
2252 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2253 if (asec == NULL)
2254 return;
2255
2256 if (apuinfo_list_length () == 0)
2257 return;
2258
2259 length = asec->size;
2260 if (length < 20)
2261 return;
2262
2263 buffer = bfd_malloc (length);
2264 if (buffer == NULL)
2265 {
2266 (*_bfd_error_handler)
2267 (_("failed to allocate space for new APUinfo section."));
2268 return;
2269 }
2270
2271 /* Create the apuinfo header. */
2272 num_entries = apuinfo_list_length ();
2273 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2274 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2275 bfd_put_32 (abfd, 0x2, buffer + 8);
2276 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2277
2278 length = 20;
2279 for (i = 0; i < num_entries; i++)
2280 {
2281 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2282 length += 4;
2283 }
2284
2285 if (length != asec->size)
2286 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2287
2288 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2289 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2290
2291 free (buffer);
2292
2293 apuinfo_list_finish ();
2294 }
2295 \f
2296 /* The following functions are specific to the ELF linker, while
2297 functions above are used generally. They appear in this file more
2298 or less in the order in which they are called. eg.
2299 ppc_elf_check_relocs is called early in the link process,
2300 ppc_elf_finish_dynamic_sections is one of the last functions
2301 called. */
2302
2303 /* The PPC linker needs to keep track of the number of relocs that it
2304 decides to copy as dynamic relocs in check_relocs for each symbol.
2305 This is so that it can later discard them if they are found to be
2306 unnecessary. We store the information in a field extending the
2307 regular ELF linker hash table. */
2308
2309 struct ppc_elf_dyn_relocs
2310 {
2311 struct ppc_elf_dyn_relocs *next;
2312
2313 /* The input section of the reloc. */
2314 asection *sec;
2315
2316 /* Total number of relocs copied for the input section. */
2317 bfd_size_type count;
2318
2319 /* Number of pc-relative relocs copied for the input section. */
2320 bfd_size_type pc_count;
2321 };
2322
2323 /* Track PLT entries needed for a given symbol. We might need more
2324 than one glink entry per symbol. */
2325 struct plt_entry
2326 {
2327 struct plt_entry *next;
2328
2329 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2330 This field stores the offset into .got2 used to initialise the
2331 GOT pointer reg. It will always be at least 32768 (and for
2332 current gcc this is the only offset used). */
2333 bfd_vma addend;
2334
2335 /* The .got2 section. */
2336 asection *sec;
2337
2338 /* PLT refcount or offset. */
2339 union
2340 {
2341 bfd_signed_vma refcount;
2342 bfd_vma offset;
2343 } plt;
2344
2345 /* .glink stub offset. */
2346 bfd_vma glink_offset;
2347 };
2348
2349 /* Of those relocs that might be copied as dynamic relocs, this macro
2350 selects those that must be copied when linking a shared library,
2351 even when the symbol is local. */
2352
2353 #define MUST_BE_DYN_RELOC(RTYPE) \
2354 ((RTYPE) != R_PPC_REL24 \
2355 && (RTYPE) != R_PPC_REL14 \
2356 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2357 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2358 && (RTYPE) != R_PPC_REL32)
2359
2360 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2361 copying dynamic variables from a shared lib into an app's dynbss
2362 section, and instead use a dynamic relocation to point into the
2363 shared lib. */
2364 #define ELIMINATE_COPY_RELOCS 1
2365
2366 /* PPC ELF linker hash entry. */
2367
2368 struct ppc_elf_link_hash_entry
2369 {
2370 struct elf_link_hash_entry elf;
2371
2372 /* If this symbol is used in the linker created sections, the processor
2373 specific backend uses this field to map the field into the offset
2374 from the beginning of the section. */
2375 elf_linker_section_pointers_t *linker_section_pointer;
2376
2377 /* Track dynamic relocs copied for this symbol. */
2378 struct ppc_elf_dyn_relocs *dyn_relocs;
2379
2380 /* Contexts in which symbol is used in the GOT (or TOC).
2381 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2382 corresponding relocs are encountered during check_relocs.
2383 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2384 indicate the corresponding GOT entry type is not needed. */
2385 #define TLS_GD 1 /* GD reloc. */
2386 #define TLS_LD 2 /* LD reloc. */
2387 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2388 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2389 #define TLS_TLS 16 /* Any TLS reloc. */
2390 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2391 char tls_mask;
2392
2393 /* Nonzero if we have seen a small data relocation referring to this
2394 symbol. */
2395 unsigned char has_sda_refs;
2396 };
2397
2398 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2399
2400 /* PPC ELF linker hash table. */
2401
2402 struct ppc_elf_link_hash_table
2403 {
2404 struct elf_link_hash_table elf;
2405
2406 /* Short-cuts to get to dynamic linker sections. */
2407 asection *got;
2408 asection *relgot;
2409 asection *glink;
2410 asection *plt;
2411 asection *relplt;
2412 asection *dynbss;
2413 asection *relbss;
2414 asection *dynsbss;
2415 asection *relsbss;
2416 elf_linker_section_t sdata[2];
2417 asection *sbss;
2418
2419 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2420 asection *srelplt2;
2421
2422 /* The .got.plt section (VxWorks only)*/
2423 asection *sgotplt;
2424
2425 /* Shortcut to .__tls_get_addr. */
2426 struct elf_link_hash_entry *tls_get_addr;
2427
2428 /* The bfd that forced an old-style PLT. */
2429 bfd *old_bfd;
2430
2431 /* TLS local dynamic got entry handling. */
2432 union {
2433 bfd_signed_vma refcount;
2434 bfd_vma offset;
2435 } tlsld_got;
2436
2437 /* Offset of PltResolve function in glink. */
2438 bfd_vma glink_pltresolve;
2439
2440 /* Size of reserved GOT entries. */
2441 unsigned int got_header_size;
2442 /* Non-zero if allocating the header left a gap. */
2443 unsigned int got_gap;
2444
2445 /* The type of PLT we have chosen to use. */
2446 enum ppc_elf_plt_type plt_type;
2447
2448 /* Set if we should emit symbols for stubs. */
2449 unsigned int emit_stub_syms:1;
2450
2451 /* True if the target system is VxWorks. */
2452 unsigned int is_vxworks:1;
2453
2454 /* The size of PLT entries. */
2455 int plt_entry_size;
2456 /* The distance between adjacent PLT slots. */
2457 int plt_slot_size;
2458 /* The size of the first PLT entry. */
2459 int plt_initial_entry_size;
2460
2461 /* Small local sym to section mapping cache. */
2462 struct sym_sec_cache sym_sec;
2463 };
2464
2465 /* Get the PPC ELF linker hash table from a link_info structure. */
2466
2467 #define ppc_elf_hash_table(p) \
2468 ((struct ppc_elf_link_hash_table *) (p)->hash)
2469
2470 /* Create an entry in a PPC ELF linker hash table. */
2471
2472 static struct bfd_hash_entry *
2473 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2474 struct bfd_hash_table *table,
2475 const char *string)
2476 {
2477 /* Allocate the structure if it has not already been allocated by a
2478 subclass. */
2479 if (entry == NULL)
2480 {
2481 entry = bfd_hash_allocate (table,
2482 sizeof (struct ppc_elf_link_hash_entry));
2483 if (entry == NULL)
2484 return entry;
2485 }
2486
2487 /* Call the allocation method of the superclass. */
2488 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2489 if (entry != NULL)
2490 {
2491 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2492 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2493 ppc_elf_hash_entry (entry)->tls_mask = 0;
2494 }
2495
2496 return entry;
2497 }
2498
2499 /* Create a PPC ELF linker hash table. */
2500
2501 static struct bfd_link_hash_table *
2502 ppc_elf_link_hash_table_create (bfd *abfd)
2503 {
2504 struct ppc_elf_link_hash_table *ret;
2505
2506 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2507 if (ret == NULL)
2508 return NULL;
2509
2510 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2511 ppc_elf_link_hash_newfunc,
2512 sizeof (struct ppc_elf_link_hash_entry)))
2513 {
2514 free (ret);
2515 return NULL;
2516 }
2517
2518 ret->elf.init_plt_refcount.refcount = 0;
2519 ret->elf.init_plt_refcount.glist = NULL;
2520 ret->elf.init_plt_offset.offset = 0;
2521 ret->elf.init_plt_offset.glist = NULL;
2522
2523 ret->sdata[0].name = ".sdata";
2524 ret->sdata[0].sym_name = "_SDA_BASE_";
2525 ret->sdata[0].bss_name = ".sbss";
2526
2527 ret->sdata[1].name = ".sdata2";
2528 ret->sdata[1].sym_name = "_SDA2_BASE_";
2529 ret->sdata[1].bss_name = ".sbss2";
2530
2531 ret->plt_entry_size = 12;
2532 ret->plt_slot_size = 8;
2533 ret->plt_initial_entry_size = 72;
2534
2535 return &ret->elf.root;
2536 }
2537
2538 /* Create .got and the related sections. */
2539
2540 static bfd_boolean
2541 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2542 {
2543 struct ppc_elf_link_hash_table *htab;
2544 asection *s;
2545 flagword flags;
2546
2547 if (!_bfd_elf_create_got_section (abfd, info))
2548 return FALSE;
2549
2550 htab = ppc_elf_hash_table (info);
2551 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2552 if (s == NULL)
2553 abort ();
2554
2555 if (htab->is_vxworks)
2556 {
2557 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2558 if (!htab->sgotplt)
2559 abort ();
2560 }
2561 else
2562 {
2563 /* The powerpc .got has a blrl instruction in it. Mark it
2564 executable. */
2565 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2567 if (!bfd_set_section_flags (abfd, s, flags))
2568 return FALSE;
2569 }
2570
2571 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2572 | SEC_LINKER_CREATED | SEC_READONLY);
2573 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2574 if (!htab->relgot
2575 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2576 return FALSE;
2577
2578 return TRUE;
2579 }
2580
2581 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2582 to output sections (just like _bfd_elf_create_dynamic_sections has
2583 to create .dynbss and .rela.bss). */
2584
2585 static bfd_boolean
2586 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2587 {
2588 struct ppc_elf_link_hash_table *htab;
2589 asection *s;
2590 flagword flags;
2591
2592 htab = ppc_elf_hash_table (info);
2593
2594 if (htab->got == NULL
2595 && !ppc_elf_create_got (abfd, info))
2596 return FALSE;
2597
2598 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2599 return FALSE;
2600
2601 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2602 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2603
2604 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2605 htab->glink = s;
2606 if (s == NULL
2607 || !bfd_set_section_alignment (abfd, s, 4))
2608 return FALSE;
2609
2610 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2611 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2612 SEC_ALLOC | SEC_LINKER_CREATED);
2613 htab->dynsbss = s;
2614 if (s == NULL)
2615 return FALSE;
2616
2617 if (! info->shared)
2618 {
2619 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2620 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2621 htab->relsbss = s;
2622 if (s == NULL
2623 || ! bfd_set_section_alignment (abfd, s, 2))
2624 return FALSE;
2625 }
2626
2627 if (htab->is_vxworks
2628 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2629 return FALSE;
2630
2631 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2632 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2633 if (s == NULL)
2634 abort ();
2635
2636 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2637 if (htab->plt_type == PLT_VXWORKS)
2638 /* The VxWorks PLT is a loaded section with contents. */
2639 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2640 return bfd_set_section_flags (abfd, s, flags);
2641 }
2642
2643 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2644
2645 static void
2646 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2647 struct elf_link_hash_entry *dir,
2648 struct elf_link_hash_entry *ind)
2649 {
2650 struct ppc_elf_link_hash_entry *edir, *eind;
2651
2652 edir = (struct ppc_elf_link_hash_entry *) dir;
2653 eind = (struct ppc_elf_link_hash_entry *) ind;
2654
2655 if (eind->dyn_relocs != NULL)
2656 {
2657 if (edir->dyn_relocs != NULL)
2658 {
2659 struct ppc_elf_dyn_relocs **pp;
2660 struct ppc_elf_dyn_relocs *p;
2661
2662 /* Add reloc counts against the indirect sym to the direct sym
2663 list. Merge any entries against the same section. */
2664 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2665 {
2666 struct ppc_elf_dyn_relocs *q;
2667
2668 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2669 if (q->sec == p->sec)
2670 {
2671 q->pc_count += p->pc_count;
2672 q->count += p->count;
2673 *pp = p->next;
2674 break;
2675 }
2676 if (q == NULL)
2677 pp = &p->next;
2678 }
2679 *pp = edir->dyn_relocs;
2680 }
2681
2682 edir->dyn_relocs = eind->dyn_relocs;
2683 eind->dyn_relocs = NULL;
2684 }
2685
2686 edir->tls_mask |= eind->tls_mask;
2687 edir->has_sda_refs |= eind->has_sda_refs;
2688
2689 /* If called to transfer flags for a weakdef during processing
2690 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2691 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2692 if (!(ELIMINATE_COPY_RELOCS
2693 && eind->elf.root.type != bfd_link_hash_indirect
2694 && edir->elf.dynamic_adjusted))
2695 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2696
2697 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2698 edir->elf.ref_regular |= eind->elf.ref_regular;
2699 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2700 edir->elf.needs_plt |= eind->elf.needs_plt;
2701
2702 /* If we were called to copy over info for a weak sym, that's all. */
2703 if (eind->elf.root.type != bfd_link_hash_indirect)
2704 return;
2705
2706 /* Copy over the GOT refcount entries that we may have already seen to
2707 the symbol which just became indirect. */
2708 edir->elf.got.refcount += eind->elf.got.refcount;
2709 eind->elf.got.refcount = 0;
2710
2711 /* And plt entries. */
2712 if (eind->elf.plt.plist != NULL)
2713 {
2714 if (edir->elf.plt.plist != NULL)
2715 {
2716 struct plt_entry **entp;
2717 struct plt_entry *ent;
2718
2719 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2720 {
2721 struct plt_entry *dent;
2722
2723 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2724 if (dent->sec == ent->sec && dent->addend == ent->addend)
2725 {
2726 dent->plt.refcount += ent->plt.refcount;
2727 *entp = ent->next;
2728 break;
2729 }
2730 if (dent == NULL)
2731 entp = &ent->next;
2732 }
2733 *entp = edir->elf.plt.plist;
2734 }
2735
2736 edir->elf.plt.plist = eind->elf.plt.plist;
2737 eind->elf.plt.plist = NULL;
2738 }
2739
2740 if (eind->elf.dynindx != -1)
2741 {
2742 if (edir->elf.dynindx != -1)
2743 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2744 edir->elf.dynstr_index);
2745 edir->elf.dynindx = eind->elf.dynindx;
2746 edir->elf.dynstr_index = eind->elf.dynstr_index;
2747 eind->elf.dynindx = -1;
2748 eind->elf.dynstr_index = 0;
2749 }
2750 }
2751
2752 /* Return 1 if target is one of ours. */
2753
2754 static bfd_boolean
2755 is_ppc_elf_target (const struct bfd_target *targ)
2756 {
2757 extern const bfd_target bfd_elf32_powerpc_vec;
2758 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2759 extern const bfd_target bfd_elf32_powerpcle_vec;
2760
2761 return (targ == &bfd_elf32_powerpc_vec
2762 || targ == &bfd_elf32_powerpc_vxworks_vec
2763 || targ == &bfd_elf32_powerpcle_vec);
2764 }
2765
2766 /* Hook called by the linker routine which adds symbols from an object
2767 file. We use it to put .comm items in .sbss, and not .bss. */
2768
2769 static bfd_boolean
2770 ppc_elf_add_symbol_hook (bfd *abfd,
2771 struct bfd_link_info *info,
2772 Elf_Internal_Sym *sym,
2773 const char **namep ATTRIBUTE_UNUSED,
2774 flagword *flagsp ATTRIBUTE_UNUSED,
2775 asection **secp,
2776 bfd_vma *valp)
2777 {
2778 if (sym->st_shndx == SHN_COMMON
2779 && !info->relocatable
2780 && sym->st_size <= elf_gp_size (abfd)
2781 && is_ppc_elf_target (info->hash->creator))
2782 {
2783 /* Common symbols less than or equal to -G nn bytes are automatically
2784 put into .sbss. */
2785 struct ppc_elf_link_hash_table *htab;
2786
2787 htab = ppc_elf_hash_table (info);
2788 if (htab->sbss == NULL)
2789 {
2790 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2791
2792 if (!htab->elf.dynobj)
2793 htab->elf.dynobj = abfd;
2794
2795 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2796 ".sbss",
2797 flags);
2798 if (htab->sbss == NULL)
2799 return FALSE;
2800 }
2801
2802 *secp = htab->sbss;
2803 *valp = sym->st_size;
2804 }
2805
2806 return TRUE;
2807 }
2808 \f
2809 static bfd_boolean
2810 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2811 elf_linker_section_t *lsect)
2812 {
2813 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2814 TRUE, FALSE, TRUE);
2815 if (lsect->sym == NULL)
2816 return FALSE;
2817 if (lsect->sym->root.type == bfd_link_hash_new)
2818 lsect->sym->non_elf = 0;
2819 lsect->sym->ref_regular = 1;
2820 return TRUE;
2821 }
2822
2823 /* Create a special linker section. */
2824
2825 static bfd_boolean
2826 ppc_elf_create_linker_section (bfd *abfd,
2827 struct bfd_link_info *info,
2828 flagword flags,
2829 elf_linker_section_t *lsect)
2830 {
2831 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2832 asection *s;
2833
2834 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2835 | SEC_LINKER_CREATED);
2836
2837 /* Record the first bfd that needs the special sections. */
2838 if (!htab->elf.dynobj)
2839 htab->elf.dynobj = abfd;
2840
2841 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2842 lsect->name,
2843 flags);
2844 if (s == NULL
2845 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2846 return FALSE;
2847 lsect->section = s;
2848
2849 return create_sdata_sym (htab, lsect);
2850 }
2851
2852 /* Find a linker generated pointer with a given addend and type. */
2853
2854 static elf_linker_section_pointers_t *
2855 elf_find_pointer_linker_section
2856 (elf_linker_section_pointers_t *linker_pointers,
2857 bfd_vma addend,
2858 elf_linker_section_t *lsect)
2859 {
2860 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2861 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2862 return linker_pointers;
2863
2864 return NULL;
2865 }
2866
2867 /* Allocate a pointer to live in a linker created section. */
2868
2869 static bfd_boolean
2870 elf_create_pointer_linker_section (bfd *abfd,
2871 elf_linker_section_t *lsect,
2872 struct elf_link_hash_entry *h,
2873 const Elf_Internal_Rela *rel)
2874 {
2875 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2876 elf_linker_section_pointers_t *linker_section_ptr;
2877 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2878 bfd_size_type amt;
2879
2880 BFD_ASSERT (lsect != NULL);
2881
2882 /* Is this a global symbol? */
2883 if (h != NULL)
2884 {
2885 struct ppc_elf_link_hash_entry *eh;
2886
2887 /* Has this symbol already been allocated? If so, our work is done. */
2888 eh = (struct ppc_elf_link_hash_entry *) h;
2889 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2890 rel->r_addend,
2891 lsect))
2892 return TRUE;
2893
2894 ptr_linker_section_ptr = &eh->linker_section_pointer;
2895 }
2896 else
2897 {
2898 /* Allocation of a pointer to a local symbol. */
2899 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2900
2901 /* Allocate a table to hold the local symbols if first time. */
2902 if (!ptr)
2903 {
2904 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2905
2906 amt = num_symbols;
2907 amt *= sizeof (elf_linker_section_pointers_t *);
2908 ptr = bfd_zalloc (abfd, amt);
2909
2910 if (!ptr)
2911 return FALSE;
2912
2913 elf_local_ptr_offsets (abfd) = ptr;
2914 }
2915
2916 /* Has this symbol already been allocated? If so, our work is done. */
2917 if (elf_find_pointer_linker_section (ptr[r_symndx],
2918 rel->r_addend,
2919 lsect))
2920 return TRUE;
2921
2922 ptr_linker_section_ptr = &ptr[r_symndx];
2923 }
2924
2925 /* Allocate space for a pointer in the linker section, and allocate
2926 a new pointer record from internal memory. */
2927 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2928 amt = sizeof (elf_linker_section_pointers_t);
2929 linker_section_ptr = bfd_alloc (abfd, amt);
2930
2931 if (!linker_section_ptr)
2932 return FALSE;
2933
2934 linker_section_ptr->next = *ptr_linker_section_ptr;
2935 linker_section_ptr->addend = rel->r_addend;
2936 linker_section_ptr->lsect = lsect;
2937 *ptr_linker_section_ptr = linker_section_ptr;
2938
2939 linker_section_ptr->offset = lsect->section->size;
2940 lsect->section->size += 4;
2941
2942 #ifdef DEBUG
2943 fprintf (stderr,
2944 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2945 lsect->name, (long) linker_section_ptr->offset,
2946 (long) lsect->section->size);
2947 #endif
2948
2949 return TRUE;
2950 }
2951
2952 static bfd_boolean
2953 update_local_sym_info (bfd *abfd,
2954 Elf_Internal_Shdr *symtab_hdr,
2955 unsigned long r_symndx,
2956 int tls_type)
2957 {
2958 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2959 char *local_got_tls_masks;
2960
2961 if (local_got_refcounts == NULL)
2962 {
2963 bfd_size_type size = symtab_hdr->sh_info;
2964
2965 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2966 local_got_refcounts = bfd_zalloc (abfd, size);
2967 if (local_got_refcounts == NULL)
2968 return FALSE;
2969 elf_local_got_refcounts (abfd) = local_got_refcounts;
2970 }
2971
2972 local_got_refcounts[r_symndx] += 1;
2973 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2974 local_got_tls_masks[r_symndx] |= tls_type;
2975 return TRUE;
2976 }
2977
2978 static bfd_boolean
2979 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2980 asection *sec, bfd_vma addend)
2981 {
2982 struct plt_entry *ent;
2983
2984 if (addend < 32768)
2985 sec = NULL;
2986 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2987 if (ent->sec == sec && ent->addend == addend)
2988 break;
2989 if (ent == NULL)
2990 {
2991 bfd_size_type amt = sizeof (*ent);
2992 ent = bfd_alloc (abfd, amt);
2993 if (ent == NULL)
2994 return FALSE;
2995 ent->next = h->plt.plist;
2996 ent->sec = sec;
2997 ent->addend = addend;
2998 ent->plt.refcount = 0;
2999 h->plt.plist = ent;
3000 }
3001 ent->plt.refcount += 1;
3002 return TRUE;
3003 }
3004
3005 static struct plt_entry *
3006 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3007 {
3008 struct plt_entry *ent;
3009
3010 if (addend < 32768)
3011 sec = NULL;
3012 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3013 if (ent->sec == sec && ent->addend == addend)
3014 break;
3015 return ent;
3016 }
3017
3018 static void
3019 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3020 {
3021 (*_bfd_error_handler)
3022 (_("%B: relocation %s cannot be used when making a shared object"),
3023 abfd,
3024 ppc_elf_howto_table[r_type]->name);
3025 bfd_set_error (bfd_error_bad_value);
3026 }
3027
3028 /* Look through the relocs for a section during the first phase, and
3029 allocate space in the global offset table or procedure linkage
3030 table. */
3031
3032 static bfd_boolean
3033 ppc_elf_check_relocs (bfd *abfd,
3034 struct bfd_link_info *info,
3035 asection *sec,
3036 const Elf_Internal_Rela *relocs)
3037 {
3038 struct ppc_elf_link_hash_table *htab;
3039 Elf_Internal_Shdr *symtab_hdr;
3040 struct elf_link_hash_entry **sym_hashes;
3041 const Elf_Internal_Rela *rel;
3042 const Elf_Internal_Rela *rel_end;
3043 asection *got2, *sreloc;
3044
3045 if (info->relocatable)
3046 return TRUE;
3047
3048 /* Don't do anything special with non-loaded, non-alloced sections.
3049 In particular, any relocs in such sections should not affect GOT
3050 and PLT reference counting (ie. we don't allow them to create GOT
3051 or PLT entries), there's no possibility or desire to optimize TLS
3052 relocs, and there's not much point in propagating relocs to shared
3053 libs that the dynamic linker won't relocate. */
3054 if ((sec->flags & SEC_ALLOC) == 0)
3055 return TRUE;
3056
3057 #ifdef DEBUG
3058 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3059 sec, abfd);
3060 #endif
3061
3062 /* Initialize howto table if not already done. */
3063 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3064 ppc_elf_howto_init ();
3065
3066 htab = ppc_elf_hash_table (info);
3067 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3068 sym_hashes = elf_sym_hashes (abfd);
3069 got2 = bfd_get_section_by_name (abfd, ".got2");
3070 sreloc = NULL;
3071
3072 rel_end = relocs + sec->reloc_count;
3073 for (rel = relocs; rel < rel_end; rel++)
3074 {
3075 unsigned long r_symndx;
3076 enum elf_ppc_reloc_type r_type;
3077 struct elf_link_hash_entry *h;
3078 int tls_type = 0;
3079
3080 r_symndx = ELF32_R_SYM (rel->r_info);
3081 if (r_symndx < symtab_hdr->sh_info)
3082 h = NULL;
3083 else
3084 {
3085 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3086 while (h->root.type == bfd_link_hash_indirect
3087 || h->root.type == bfd_link_hash_warning)
3088 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3089 }
3090
3091 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3092 This shows up in particular in an R_PPC_ADDR32 in the eabi
3093 startup code. */
3094 if (h != NULL
3095 && htab->got == NULL
3096 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3097 {
3098 if (htab->elf.dynobj == NULL)
3099 htab->elf.dynobj = abfd;
3100 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3101 return FALSE;
3102 BFD_ASSERT (h == htab->elf.hgot);
3103 }
3104
3105 r_type = ELF32_R_TYPE (rel->r_info);
3106 switch (r_type)
3107 {
3108 case R_PPC_GOT_TLSLD16:
3109 case R_PPC_GOT_TLSLD16_LO:
3110 case R_PPC_GOT_TLSLD16_HI:
3111 case R_PPC_GOT_TLSLD16_HA:
3112 tls_type = TLS_TLS | TLS_LD;
3113 goto dogottls;
3114
3115 case R_PPC_GOT_TLSGD16:
3116 case R_PPC_GOT_TLSGD16_LO:
3117 case R_PPC_GOT_TLSGD16_HI:
3118 case R_PPC_GOT_TLSGD16_HA:
3119 tls_type = TLS_TLS | TLS_GD;
3120 goto dogottls;
3121
3122 case R_PPC_GOT_TPREL16:
3123 case R_PPC_GOT_TPREL16_LO:
3124 case R_PPC_GOT_TPREL16_HI:
3125 case R_PPC_GOT_TPREL16_HA:
3126 if (info->shared)
3127 info->flags |= DF_STATIC_TLS;
3128 tls_type = TLS_TLS | TLS_TPREL;
3129 goto dogottls;
3130
3131 case R_PPC_GOT_DTPREL16:
3132 case R_PPC_GOT_DTPREL16_LO:
3133 case R_PPC_GOT_DTPREL16_HI:
3134 case R_PPC_GOT_DTPREL16_HA:
3135 tls_type = TLS_TLS | TLS_DTPREL;
3136 dogottls:
3137 sec->has_tls_reloc = 1;
3138 /* Fall thru */
3139
3140 /* GOT16 relocations */
3141 case R_PPC_GOT16:
3142 case R_PPC_GOT16_LO:
3143 case R_PPC_GOT16_HI:
3144 case R_PPC_GOT16_HA:
3145 /* This symbol requires a global offset table entry. */
3146 if (htab->got == NULL)
3147 {
3148 if (htab->elf.dynobj == NULL)
3149 htab->elf.dynobj = abfd;
3150 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3151 return FALSE;
3152 }
3153 if (h != NULL)
3154 {
3155 h->got.refcount += 1;
3156 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3157 }
3158 else
3159 /* This is a global offset table entry for a local symbol. */
3160 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3161 return FALSE;
3162 break;
3163
3164 /* Indirect .sdata relocation. */
3165 case R_PPC_EMB_SDAI16:
3166 if (info->shared)
3167 {
3168 bad_shared_reloc (abfd, r_type);
3169 return FALSE;
3170 }
3171 if (htab->sdata[0].section == NULL
3172 && !ppc_elf_create_linker_section (abfd, info, 0,
3173 &htab->sdata[0]))
3174 return FALSE;
3175 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3176 h, rel))
3177 return FALSE;
3178 if (h != NULL)
3179 {
3180 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3181 h->non_got_ref = TRUE;
3182 }
3183 break;
3184
3185 /* Indirect .sdata2 relocation. */
3186 case R_PPC_EMB_SDA2I16:
3187 if (info->shared)
3188 {
3189 bad_shared_reloc (abfd, r_type);
3190 return FALSE;
3191 }
3192 if (htab->sdata[1].section == NULL
3193 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3194 &htab->sdata[1]))
3195 return FALSE;
3196 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3197 h, rel))
3198 return FALSE;
3199 if (h != NULL)
3200 {
3201 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3202 h->non_got_ref = TRUE;
3203 }
3204 break;
3205
3206 case R_PPC_SDAREL16:
3207 if (info->shared)
3208 {
3209 bad_shared_reloc (abfd, r_type);
3210 return FALSE;
3211 }
3212 if (htab->sdata[0].sym == NULL
3213 && !create_sdata_sym (htab, &htab->sdata[0]))
3214 return FALSE;
3215 if (h != NULL)
3216 {
3217 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3218 h->non_got_ref = TRUE;
3219 }
3220 break;
3221
3222 case R_PPC_EMB_SDA2REL:
3223 if (info->shared)
3224 {
3225 bad_shared_reloc (abfd, r_type);
3226 return FALSE;
3227 }
3228 if (htab->sdata[1].sym == NULL
3229 && !create_sdata_sym (htab, &htab->sdata[1]))
3230 return FALSE;
3231 if (h != NULL)
3232 {
3233 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3234 h->non_got_ref = TRUE;
3235 }
3236 break;
3237
3238 case R_PPC_EMB_SDA21:
3239 case R_PPC_EMB_RELSDA:
3240 if (info->shared)
3241 {
3242 bad_shared_reloc (abfd, r_type);
3243 return FALSE;
3244 }
3245 if (htab->sdata[0].sym == NULL
3246 && !create_sdata_sym (htab, &htab->sdata[0]))
3247 return FALSE;
3248 if (htab->sdata[1].sym == NULL
3249 && !create_sdata_sym (htab, &htab->sdata[1]))
3250 return FALSE;
3251 if (h != NULL)
3252 {
3253 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3254 h->non_got_ref = TRUE;
3255 }
3256 break;
3257
3258 case R_PPC_EMB_NADDR32:
3259 case R_PPC_EMB_NADDR16:
3260 case R_PPC_EMB_NADDR16_LO:
3261 case R_PPC_EMB_NADDR16_HI:
3262 case R_PPC_EMB_NADDR16_HA:
3263 if (info->shared)
3264 {
3265 bad_shared_reloc (abfd, r_type);
3266 return FALSE;
3267 }
3268 if (h != NULL)
3269 h->non_got_ref = TRUE;
3270 break;
3271
3272 case R_PPC_PLT32:
3273 case R_PPC_PLTREL24:
3274 case R_PPC_PLTREL32:
3275 case R_PPC_PLT16_LO:
3276 case R_PPC_PLT16_HI:
3277 case R_PPC_PLT16_HA:
3278 #ifdef DEBUG
3279 fprintf (stderr, "Reloc requires a PLT entry\n");
3280 #endif
3281 /* This symbol requires a procedure linkage table entry. We
3282 actually build the entry in finish_dynamic_symbol,
3283 because this might be a case of linking PIC code without
3284 linking in any dynamic objects, in which case we don't
3285 need to generate a procedure linkage table after all. */
3286
3287 if (h == NULL)
3288 {
3289 /* It does not make sense to have a procedure linkage
3290 table entry for a local symbol. */
3291 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3292 "local symbol"),
3293 abfd,
3294 sec,
3295 (long) rel->r_offset,
3296 ppc_elf_howto_table[r_type]->name);
3297 bfd_set_error (bfd_error_bad_value);
3298 return FALSE;
3299 }
3300 else
3301 {
3302 bfd_vma addend = 0;
3303
3304 if (r_type == R_PPC_PLTREL24)
3305 {
3306 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3307 addend = rel->r_addend;
3308 }
3309 h->needs_plt = 1;
3310 if (!update_plt_info (abfd, h, got2, addend))
3311 return FALSE;
3312 }
3313 break;
3314
3315 /* The following relocations don't need to propagate the
3316 relocation if linking a shared object since they are
3317 section relative. */
3318 case R_PPC_SECTOFF:
3319 case R_PPC_SECTOFF_LO:
3320 case R_PPC_SECTOFF_HI:
3321 case R_PPC_SECTOFF_HA:
3322 case R_PPC_DTPREL16:
3323 case R_PPC_DTPREL16_LO:
3324 case R_PPC_DTPREL16_HI:
3325 case R_PPC_DTPREL16_HA:
3326 case R_PPC_TOC16:
3327 break;
3328
3329 case R_PPC_REL16:
3330 case R_PPC_REL16_LO:
3331 case R_PPC_REL16_HI:
3332 case R_PPC_REL16_HA:
3333 ppc_elf_tdata (abfd)->has_rel16 = 1;
3334 break;
3335
3336 /* These are just markers. */
3337 case R_PPC_TLS:
3338 case R_PPC_EMB_MRKREF:
3339 case R_PPC_NONE:
3340 case R_PPC_max:
3341 break;
3342
3343 /* These should only appear in dynamic objects. */
3344 case R_PPC_COPY:
3345 case R_PPC_GLOB_DAT:
3346 case R_PPC_JMP_SLOT:
3347 case R_PPC_RELATIVE:
3348 break;
3349
3350 /* These aren't handled yet. We'll report an error later. */
3351 case R_PPC_ADDR30:
3352 case R_PPC_EMB_RELSEC16:
3353 case R_PPC_EMB_RELST_LO:
3354 case R_PPC_EMB_RELST_HI:
3355 case R_PPC_EMB_RELST_HA:
3356 case R_PPC_EMB_BIT_FLD:
3357 break;
3358
3359 /* This refers only to functions defined in the shared library. */
3360 case R_PPC_LOCAL24PC:
3361 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3362 {
3363 htab->plt_type = PLT_OLD;
3364 htab->old_bfd = abfd;
3365 }
3366 break;
3367
3368 /* This relocation describes the C++ object vtable hierarchy.
3369 Reconstruct it for later use during GC. */
3370 case R_PPC_GNU_VTINHERIT:
3371 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3372 return FALSE;
3373 break;
3374
3375 /* This relocation describes which C++ vtable entries are actually
3376 used. Record for later use during GC. */
3377 case R_PPC_GNU_VTENTRY:
3378 BFD_ASSERT (h != NULL);
3379 if (h != NULL
3380 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3381 return FALSE;
3382 break;
3383
3384 /* We shouldn't really be seeing these. */
3385 case R_PPC_TPREL32:
3386 if (info->shared)
3387 info->flags |= DF_STATIC_TLS;
3388 goto dodyn;
3389
3390 /* Nor these. */
3391 case R_PPC_DTPMOD32:
3392 case R_PPC_DTPREL32:
3393 goto dodyn;
3394
3395 case R_PPC_TPREL16:
3396 case R_PPC_TPREL16_LO:
3397 case R_PPC_TPREL16_HI:
3398 case R_PPC_TPREL16_HA:
3399 if (info->shared)
3400 info->flags |= DF_STATIC_TLS;
3401 goto dodyn;
3402
3403 case R_PPC_REL32:
3404 if (h == NULL
3405 && got2 != NULL
3406 && (sec->flags & SEC_CODE) != 0
3407 && (info->shared || info->pie)
3408 && htab->plt_type == PLT_UNSET)
3409 {
3410 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3411 the start of a function, which assembles to a REL32
3412 reference to .got2. If we detect one of these, then
3413 force the old PLT layout because the linker cannot
3414 reliably deduce the GOT pointer value needed for
3415 PLT call stubs. */
3416 asection *s;
3417
3418 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3419 r_symndx);
3420 if (s == got2)
3421 {
3422 htab->plt_type = PLT_OLD;
3423 htab->old_bfd = abfd;
3424 }
3425 }
3426 if (h == NULL || h == htab->elf.hgot)
3427 break;
3428 goto dodyn1;
3429
3430 case R_PPC_REL24:
3431 case R_PPC_REL14:
3432 case R_PPC_REL14_BRTAKEN:
3433 case R_PPC_REL14_BRNTAKEN:
3434 if (h == NULL)
3435 break;
3436 if (h == htab->elf.hgot)
3437 {
3438 if (htab->plt_type == PLT_UNSET)
3439 {
3440 htab->plt_type = PLT_OLD;
3441 htab->old_bfd = abfd;
3442 }
3443 break;
3444 }
3445 /* fall through */
3446
3447 case R_PPC_ADDR32:
3448 case R_PPC_ADDR24:
3449 case R_PPC_ADDR16:
3450 case R_PPC_ADDR16_LO:
3451 case R_PPC_ADDR16_HI:
3452 case R_PPC_ADDR16_HA:
3453 case R_PPC_ADDR14:
3454 case R_PPC_ADDR14_BRTAKEN:
3455 case R_PPC_ADDR14_BRNTAKEN:
3456 case R_PPC_UADDR32:
3457 case R_PPC_UADDR16:
3458 dodyn1:
3459 if (h != NULL && !info->shared)
3460 {
3461 /* We may need a plt entry if the symbol turns out to be
3462 a function defined in a dynamic object. */
3463 if (!update_plt_info (abfd, h, NULL, 0))
3464 return FALSE;
3465
3466 /* We may need a copy reloc too. */
3467 h->non_got_ref = 1;
3468 }
3469
3470 dodyn:
3471 /* If we are creating a shared library, and this is a reloc
3472 against a global symbol, or a non PC relative reloc
3473 against a local symbol, then we need to copy the reloc
3474 into the shared library. However, if we are linking with
3475 -Bsymbolic, we do not need to copy a reloc against a
3476 global symbol which is defined in an object we are
3477 including in the link (i.e., DEF_REGULAR is set). At
3478 this point we have not seen all the input files, so it is
3479 possible that DEF_REGULAR is not set now but will be set
3480 later (it is never cleared). In case of a weak definition,
3481 DEF_REGULAR may be cleared later by a strong definition in
3482 a shared library. We account for that possibility below by
3483 storing information in the dyn_relocs field of the hash
3484 table entry. A similar situation occurs when creating
3485 shared libraries and symbol visibility changes render the
3486 symbol local.
3487
3488 If on the other hand, we are creating an executable, we
3489 may need to keep relocations for symbols satisfied by a
3490 dynamic library if we manage to avoid copy relocs for the
3491 symbol. */
3492 if ((info->shared
3493 && (MUST_BE_DYN_RELOC (r_type)
3494 || (h != NULL
3495 && (! info->symbolic
3496 || h->root.type == bfd_link_hash_defweak
3497 || !h->def_regular))))
3498 || (ELIMINATE_COPY_RELOCS
3499 && !info->shared
3500 && h != NULL
3501 && (h->root.type == bfd_link_hash_defweak
3502 || !h->def_regular)))
3503 {
3504 struct ppc_elf_dyn_relocs *p;
3505 struct ppc_elf_dyn_relocs **head;
3506
3507 #ifdef DEBUG
3508 fprintf (stderr,
3509 "ppc_elf_check_relocs needs to "
3510 "create relocation for %s\n",
3511 (h && h->root.root.string
3512 ? h->root.root.string : "<unknown>"));
3513 #endif
3514 if (sreloc == NULL)
3515 {
3516 const char *name;
3517
3518 name = (bfd_elf_string_from_elf_section
3519 (abfd,
3520 elf_elfheader (abfd)->e_shstrndx,
3521 elf_section_data (sec)->rel_hdr.sh_name));
3522 if (name == NULL)
3523 return FALSE;
3524
3525 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3526 && strcmp (bfd_get_section_name (abfd, sec),
3527 name + 5) == 0);
3528
3529 if (htab->elf.dynobj == NULL)
3530 htab->elf.dynobj = abfd;
3531 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3532 if (sreloc == NULL)
3533 {
3534 flagword flags;
3535
3536 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3537 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3538 | SEC_ALLOC | SEC_LOAD);
3539 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3540 name,
3541 flags);
3542 if (sreloc == NULL
3543 || ! bfd_set_section_alignment (htab->elf.dynobj,
3544 sreloc, 2))
3545 return FALSE;
3546 }
3547 elf_section_data (sec)->sreloc = sreloc;
3548 }
3549
3550 /* If this is a global symbol, we count the number of
3551 relocations we need for this symbol. */
3552 if (h != NULL)
3553 {
3554 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3555 }
3556 else
3557 {
3558 /* Track dynamic relocs needed for local syms too.
3559 We really need local syms available to do this
3560 easily. Oh well. */
3561
3562 asection *s;
3563 void *vpp;
3564
3565 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3566 sec, r_symndx);
3567 if (s == NULL)
3568 return FALSE;
3569
3570 vpp = &elf_section_data (s)->local_dynrel;
3571 head = (struct ppc_elf_dyn_relocs **) vpp;
3572 }
3573
3574 p = *head;
3575 if (p == NULL || p->sec != sec)
3576 {
3577 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3578 if (p == NULL)
3579 return FALSE;
3580 p->next = *head;
3581 *head = p;
3582 p->sec = sec;
3583 p->count = 0;
3584 p->pc_count = 0;
3585 }
3586
3587 p->count += 1;
3588 if (!MUST_BE_DYN_RELOC (r_type))
3589 p->pc_count += 1;
3590 }
3591
3592 break;
3593 }
3594 }
3595
3596 return TRUE;
3597 }
3598 \f
3599
3600 /* Merge object attributes from IBFD into OBFD. Raise an error if
3601 there are conflicting attributes. */
3602 static bfd_boolean
3603 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3604 {
3605 obj_attribute *in_attr, *in_attrs;
3606 obj_attribute *out_attr, *out_attrs;
3607
3608 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3609 {
3610 /* This is the first object. Copy the attributes. */
3611 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3612
3613 /* Use the Tag_null value to indicate the attributes have been
3614 initialized. */
3615 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3616
3617 return TRUE;
3618 }
3619
3620 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3621 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3622
3623 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3624 non-conflicting ones. */
3625 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3626 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3627 if (in_attr->i != out_attr->i)
3628 {
3629 out_attr->type = 1;
3630 if (out_attr->i == 0)
3631 out_attr->i = in_attr->i;
3632 else if (in_attr->i == 0)
3633 ;
3634 else if (out_attr->i == 1 && in_attr->i == 2)
3635 _bfd_error_handler
3636 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3637 else if (out_attr->i == 2 && in_attr->i == 1)
3638 _bfd_error_handler
3639 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3640 else if (in_attr->i > 2)
3641 _bfd_error_handler
3642 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3643 in_attr->i);
3644 else
3645 _bfd_error_handler
3646 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3647 out_attr->i);
3648 }
3649
3650 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3651 merge non-conflicting ones. */
3652 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3653 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3654 if (in_attr->i != out_attr->i)
3655 {
3656 const char *in_abi = NULL, *out_abi = NULL;
3657
3658 switch (in_attr->i)
3659 {
3660 case 1: in_abi = "generic"; break;
3661 case 2: in_abi = "AltiVec"; break;
3662 case 3: in_abi = "SPE"; break;
3663 }
3664
3665 switch (out_attr->i)
3666 {
3667 case 1: out_abi = "generic"; break;
3668 case 2: out_abi = "AltiVec"; break;
3669 case 3: out_abi = "SPE"; break;
3670 }
3671
3672 out_attr->type = 1;
3673 if (out_attr->i == 0)
3674 out_attr->i = in_attr->i;
3675 else if (in_attr->i == 0)
3676 ;
3677 /* For now, allow generic to transition to AltiVec or SPE
3678 without a warning. If GCC marked files with their stack
3679 alignment and used don't-care markings for files which are
3680 not affected by the vector ABI, we could warn about this
3681 case too. */
3682 else if (out_attr->i == 1)
3683 out_attr->i = in_attr->i;
3684 else if (in_attr->i == 1)
3685 ;
3686 else if (in_abi == NULL)
3687 _bfd_error_handler
3688 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3689 in_attr->i);
3690 else if (out_abi == NULL)
3691 _bfd_error_handler
3692 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3693 in_attr->i);
3694 else
3695 _bfd_error_handler
3696 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3697 ibfd, obfd, in_abi, out_abi);
3698 }
3699
3700 /* Merge Tag_compatibility attributes and any common GNU ones. */
3701 _bfd_elf_merge_object_attributes (ibfd, obfd);
3702
3703 return TRUE;
3704 }
3705
3706 /* Merge backend specific data from an object file to the output
3707 object file when linking. */
3708
3709 static bfd_boolean
3710 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3711 {
3712 flagword old_flags;
3713 flagword new_flags;
3714 bfd_boolean error;
3715
3716 if (!is_ppc_elf_target (ibfd->xvec)
3717 || !is_ppc_elf_target (obfd->xvec))
3718 return TRUE;
3719
3720 /* Check if we have the same endianess. */
3721 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3722 return FALSE;
3723
3724 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3725 return FALSE;
3726
3727 new_flags = elf_elfheader (ibfd)->e_flags;
3728 old_flags = elf_elfheader (obfd)->e_flags;
3729 if (!elf_flags_init (obfd))
3730 {
3731 /* First call, no flags set. */
3732 elf_flags_init (obfd) = TRUE;
3733 elf_elfheader (obfd)->e_flags = new_flags;
3734 }
3735
3736 /* Compatible flags are ok. */
3737 else if (new_flags == old_flags)
3738 ;
3739
3740 /* Incompatible flags. */
3741 else
3742 {
3743 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3744 to be linked with either. */
3745 error = FALSE;
3746 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3747 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3748 {
3749 error = TRUE;
3750 (*_bfd_error_handler)
3751 (_("%B: compiled with -mrelocatable and linked with "
3752 "modules compiled normally"), ibfd);
3753 }
3754 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3755 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3756 {
3757 error = TRUE;
3758 (*_bfd_error_handler)
3759 (_("%B: compiled normally and linked with "
3760 "modules compiled with -mrelocatable"), ibfd);
3761 }
3762
3763 /* The output is -mrelocatable-lib iff both the input files are. */
3764 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3765 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3766
3767 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3768 but each input file is either -mrelocatable or -mrelocatable-lib. */
3769 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3770 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3771 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3772 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3773
3774 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3775 any module uses it. */
3776 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3777
3778 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3779 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3780
3781 /* Warn about any other mismatches. */
3782 if (new_flags != old_flags)
3783 {
3784 error = TRUE;
3785 (*_bfd_error_handler)
3786 (_("%B: uses different e_flags (0x%lx) fields "
3787 "than previous modules (0x%lx)"),
3788 ibfd, (long) new_flags, (long) old_flags);
3789 }
3790
3791 if (error)
3792 {
3793 bfd_set_error (bfd_error_bad_value);
3794 return FALSE;
3795 }
3796 }
3797
3798 return TRUE;
3799 }
3800 \f
3801 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3802 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3803 int
3804 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3805 struct bfd_link_info *info,
3806 enum ppc_elf_plt_type plt_style,
3807 int emit_stub_syms)
3808 {
3809 struct ppc_elf_link_hash_table *htab;
3810 flagword flags;
3811
3812 htab = ppc_elf_hash_table (info);
3813
3814 if (htab->plt_type == PLT_UNSET)
3815 {
3816 if (plt_style == PLT_OLD)
3817 htab->plt_type = PLT_OLD;
3818 else
3819 {
3820 bfd *ibfd;
3821 enum ppc_elf_plt_type plt_type = plt_style;
3822
3823 /* Look through the reloc flags left by ppc_elf_check_relocs.
3824 Use the old style bss plt if a file makes plt calls
3825 without using the new relocs, and if ld isn't given
3826 --secure-plt and we never see REL16 relocs. */
3827 if (plt_type == PLT_UNSET)
3828 plt_type = PLT_OLD;
3829 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3830 if (is_ppc_elf_target (ibfd->xvec))
3831 {
3832 if (ppc_elf_tdata (ibfd)->has_rel16)
3833 plt_type = PLT_NEW;
3834 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3835 {
3836 plt_type = PLT_OLD;
3837 htab->old_bfd = ibfd;
3838 break;
3839 }
3840 }
3841 htab->plt_type = plt_type;
3842 }
3843 }
3844 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3845 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3846
3847 htab->emit_stub_syms = emit_stub_syms;
3848
3849 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3850
3851 if (htab->plt_type == PLT_NEW)
3852 {
3853 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3854 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3855
3856 /* The new PLT is a loaded section. */
3857 if (htab->plt != NULL
3858 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3859 return -1;
3860
3861 /* The new GOT is not executable. */
3862 if (htab->got != NULL
3863 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3864 return -1;
3865 }
3866 else
3867 {
3868 /* Stop an unused .glink section from affecting .text alignment. */
3869 if (htab->glink != NULL
3870 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3871 return -1;
3872 }
3873 return htab->plt_type == PLT_NEW;
3874 }
3875 \f
3876 /* Return the section that should be marked against GC for a given
3877 relocation. */
3878
3879 static asection *
3880 ppc_elf_gc_mark_hook (asection *sec,
3881 struct bfd_link_info *info,
3882 Elf_Internal_Rela *rel,
3883 struct elf_link_hash_entry *h,
3884 Elf_Internal_Sym *sym)
3885 {
3886 if (h != NULL)
3887 switch (ELF32_R_TYPE (rel->r_info))
3888 {
3889 case R_PPC_GNU_VTINHERIT:
3890 case R_PPC_GNU_VTENTRY:
3891 return NULL;
3892 }
3893
3894 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3895 }
3896
3897 /* Update the got, plt and dynamic reloc reference counts for the
3898 section being removed. */
3899
3900 static bfd_boolean
3901 ppc_elf_gc_sweep_hook (bfd *abfd,
3902 struct bfd_link_info *info,
3903 asection *sec,
3904 const Elf_Internal_Rela *relocs)
3905 {
3906 struct ppc_elf_link_hash_table *htab;
3907 Elf_Internal_Shdr *symtab_hdr;
3908 struct elf_link_hash_entry **sym_hashes;
3909 bfd_signed_vma *local_got_refcounts;
3910 const Elf_Internal_Rela *rel, *relend;
3911 asection *got2;
3912
3913 if (info->relocatable)
3914 return TRUE;
3915
3916 if ((sec->flags & SEC_ALLOC) == 0)
3917 return TRUE;
3918
3919 elf_section_data (sec)->local_dynrel = NULL;
3920
3921 htab = ppc_elf_hash_table (info);
3922 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3923 sym_hashes = elf_sym_hashes (abfd);
3924 local_got_refcounts = elf_local_got_refcounts (abfd);
3925 got2 = bfd_get_section_by_name (abfd, ".got2");
3926
3927 relend = relocs + sec->reloc_count;
3928 for (rel = relocs; rel < relend; rel++)
3929 {
3930 unsigned long r_symndx;
3931 enum elf_ppc_reloc_type r_type;
3932 struct elf_link_hash_entry *h = NULL;
3933
3934 r_symndx = ELF32_R_SYM (rel->r_info);
3935 if (r_symndx >= symtab_hdr->sh_info)
3936 {
3937 struct ppc_elf_dyn_relocs **pp, *p;
3938 struct ppc_elf_link_hash_entry *eh;
3939
3940 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3941 while (h->root.type == bfd_link_hash_indirect
3942 || h->root.type == bfd_link_hash_warning)
3943 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3944 eh = (struct ppc_elf_link_hash_entry *) h;
3945
3946 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3947 if (p->sec == sec)
3948 {
3949 /* Everything must go for SEC. */
3950 *pp = p->next;
3951 break;
3952 }
3953 }
3954
3955 r_type = ELF32_R_TYPE (rel->r_info);
3956 switch (r_type)
3957 {
3958 case R_PPC_GOT_TLSLD16:
3959 case R_PPC_GOT_TLSLD16_LO:
3960 case R_PPC_GOT_TLSLD16_HI:
3961 case R_PPC_GOT_TLSLD16_HA:
3962 case R_PPC_GOT_TLSGD16:
3963 case R_PPC_GOT_TLSGD16_LO:
3964 case R_PPC_GOT_TLSGD16_HI:
3965 case R_PPC_GOT_TLSGD16_HA:
3966 case R_PPC_GOT_TPREL16:
3967 case R_PPC_GOT_TPREL16_LO:
3968 case R_PPC_GOT_TPREL16_HI:
3969 case R_PPC_GOT_TPREL16_HA:
3970 case R_PPC_GOT_DTPREL16:
3971 case R_PPC_GOT_DTPREL16_LO:
3972 case R_PPC_GOT_DTPREL16_HI:
3973 case R_PPC_GOT_DTPREL16_HA:
3974 case R_PPC_GOT16:
3975 case R_PPC_GOT16_LO:
3976 case R_PPC_GOT16_HI:
3977 case R_PPC_GOT16_HA:
3978 if (h != NULL)
3979 {
3980 if (h->got.refcount > 0)
3981 h->got.refcount--;
3982 }
3983 else if (local_got_refcounts != NULL)
3984 {
3985 if (local_got_refcounts[r_symndx] > 0)
3986 local_got_refcounts[r_symndx]--;
3987 }
3988 break;
3989
3990 case R_PPC_REL24:
3991 case R_PPC_REL14:
3992 case R_PPC_REL14_BRTAKEN:
3993 case R_PPC_REL14_BRNTAKEN:
3994 case R_PPC_REL32:
3995 if (h == NULL || h == htab->elf.hgot)
3996 break;
3997 /* Fall thru */
3998
3999 case R_PPC_ADDR32:
4000 case R_PPC_ADDR24:
4001 case R_PPC_ADDR16:
4002 case R_PPC_ADDR16_LO:
4003 case R_PPC_ADDR16_HI:
4004 case R_PPC_ADDR16_HA:
4005 case R_PPC_ADDR14:
4006 case R_PPC_ADDR14_BRTAKEN:
4007 case R_PPC_ADDR14_BRNTAKEN:
4008 case R_PPC_UADDR32:
4009 case R_PPC_UADDR16:
4010 if (info->shared)
4011 break;
4012
4013 case R_PPC_PLT32:
4014 case R_PPC_PLTREL24:
4015 case R_PPC_PLTREL32:
4016 case R_PPC_PLT16_LO:
4017 case R_PPC_PLT16_HI:
4018 case R_PPC_PLT16_HA:
4019 if (h != NULL)
4020 {
4021 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4022 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4023 if (ent->plt.refcount > 0)
4024 ent->plt.refcount -= 1;
4025 }
4026 break;
4027
4028 default:
4029 break;
4030 }
4031 }
4032 return TRUE;
4033 }
4034 \f
4035 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4036
4037 asection *
4038 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4039 {
4040 struct ppc_elf_link_hash_table *htab;
4041
4042 htab = ppc_elf_hash_table (info);
4043 if (htab->plt_type == PLT_NEW
4044 && htab->plt != NULL
4045 && htab->plt->output_section != NULL)
4046 {
4047 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4048 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4049 }
4050
4051 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4052 FALSE, FALSE, TRUE);
4053 return _bfd_elf_tls_setup (obfd, info);
4054 }
4055
4056 /* Run through all the TLS relocs looking for optimization
4057 opportunities. */
4058
4059 bfd_boolean
4060 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4061 struct bfd_link_info *info)
4062 {
4063 bfd *ibfd;
4064 asection *sec;
4065 struct ppc_elf_link_hash_table *htab;
4066 int pass;
4067
4068 if (info->relocatable || info->shared)
4069 return TRUE;
4070
4071 htab = ppc_elf_hash_table (info);
4072 /* Make two passes through the relocs. First time check that tls
4073 relocs involved in setting up a tls_get_addr call are indeed
4074 followed by such a call. If they are not, exclude them from
4075 the optimizations done on the second pass. */
4076 for (pass = 0; pass < 2; ++pass)
4077 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4078 {
4079 Elf_Internal_Sym *locsyms = NULL;
4080 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4081
4082 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4083 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4084 {
4085 Elf_Internal_Rela *relstart, *rel, *relend;
4086
4087 /* Read the relocations. */
4088 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4089 info->keep_memory);
4090 if (relstart == NULL)
4091 return FALSE;
4092
4093 relend = relstart + sec->reloc_count;
4094 for (rel = relstart; rel < relend; rel++)
4095 {
4096 enum elf_ppc_reloc_type r_type;
4097 unsigned long r_symndx;
4098 struct elf_link_hash_entry *h = NULL;
4099 char *tls_mask;
4100 char tls_set, tls_clear;
4101 bfd_boolean is_local;
4102 int expecting_tls_get_addr;
4103 bfd_signed_vma *got_count;
4104
4105 r_symndx = ELF32_R_SYM (rel->r_info);
4106 if (r_symndx >= symtab_hdr->sh_info)
4107 {
4108 struct elf_link_hash_entry **sym_hashes;
4109
4110 sym_hashes = elf_sym_hashes (ibfd);
4111 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4112 while (h->root.type == bfd_link_hash_indirect
4113 || h->root.type == bfd_link_hash_warning)
4114 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4115 }
4116
4117 expecting_tls_get_addr = 0;
4118 is_local = FALSE;
4119 if (h == NULL
4120 || !h->def_dynamic)
4121 is_local = TRUE;
4122
4123 r_type = ELF32_R_TYPE (rel->r_info);
4124 switch (r_type)
4125 {
4126 case R_PPC_GOT_TLSLD16:
4127 case R_PPC_GOT_TLSLD16_LO:
4128 expecting_tls_get_addr = 1;
4129 /* Fall thru */
4130
4131 case R_PPC_GOT_TLSLD16_HI:
4132 case R_PPC_GOT_TLSLD16_HA:
4133 /* These relocs should never be against a symbol
4134 defined in a shared lib. Leave them alone if
4135 that turns out to be the case. */
4136 if (!is_local)
4137 continue;
4138
4139 /* LD -> LE */
4140 tls_set = 0;
4141 tls_clear = TLS_LD;
4142 break;
4143
4144 case R_PPC_GOT_TLSGD16:
4145 case R_PPC_GOT_TLSGD16_LO:
4146 expecting_tls_get_addr = 1;
4147 /* Fall thru */
4148
4149 case R_PPC_GOT_TLSGD16_HI:
4150 case R_PPC_GOT_TLSGD16_HA:
4151 if (is_local)
4152 /* GD -> LE */
4153 tls_set = 0;
4154 else
4155 /* GD -> IE */
4156 tls_set = TLS_TLS | TLS_TPRELGD;
4157 tls_clear = TLS_GD;
4158 break;
4159
4160 case R_PPC_GOT_TPREL16:
4161 case R_PPC_GOT_TPREL16_LO:
4162 case R_PPC_GOT_TPREL16_HI:
4163 case R_PPC_GOT_TPREL16_HA:
4164 if (is_local)
4165 {
4166 /* IE -> LE */
4167 tls_set = 0;
4168 tls_clear = TLS_TPREL;
4169 break;
4170 }
4171 else
4172 continue;
4173
4174 default:
4175 continue;
4176 }
4177
4178 if (pass == 0)
4179 {
4180 if (!expecting_tls_get_addr)
4181 continue;
4182
4183 if (rel + 1 < relend)
4184 {
4185 enum elf_ppc_reloc_type r_type2;
4186 unsigned long r_symndx2;
4187 struct elf_link_hash_entry *h2;
4188
4189 /* The next instruction should be a call to
4190 __tls_get_addr. Peek at the reloc to be sure. */
4191 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4192 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4193 if (r_symndx2 >= symtab_hdr->sh_info
4194 && (r_type2 == R_PPC_REL14
4195 || r_type2 == R_PPC_REL14_BRTAKEN
4196 || r_type2 == R_PPC_REL14_BRNTAKEN
4197 || r_type2 == R_PPC_REL24
4198 || r_type2 == R_PPC_PLTREL24))
4199 {
4200 struct elf_link_hash_entry **sym_hashes;
4201
4202 sym_hashes = elf_sym_hashes (ibfd);
4203 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4204 while (h2->root.type == bfd_link_hash_indirect
4205 || h2->root.type == bfd_link_hash_warning)
4206 h2 = ((struct elf_link_hash_entry *)
4207 h2->root.u.i.link);
4208 if (h2 == htab->tls_get_addr)
4209 continue;
4210 }
4211 }
4212
4213 /* Uh oh, we didn't find the expected call. We
4214 could just mark this symbol to exclude it
4215 from tls optimization but it's safer to skip
4216 the entire section. */
4217 sec->has_tls_reloc = 0;
4218 break;
4219 }
4220
4221 if (h != NULL)
4222 {
4223 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4224 got_count = &h->got.refcount;
4225 }
4226 else
4227 {
4228 Elf_Internal_Sym *sym;
4229 bfd_signed_vma *lgot_refs;
4230 char *lgot_masks;
4231
4232 if (locsyms == NULL)
4233 {
4234 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4235 if (locsyms == NULL)
4236 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4237 symtab_hdr->sh_info,
4238 0, NULL, NULL, NULL);
4239 if (locsyms == NULL)
4240 {
4241 if (elf_section_data (sec)->relocs != relstart)
4242 free (relstart);
4243 return FALSE;
4244 }
4245 }
4246 sym = locsyms + r_symndx;
4247 lgot_refs = elf_local_got_refcounts (ibfd);
4248 if (lgot_refs == NULL)
4249 abort ();
4250 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4251 tls_mask = &lgot_masks[r_symndx];
4252 got_count = &lgot_refs[r_symndx];
4253 }
4254
4255 if (tls_set == 0)
4256 {
4257 /* We managed to get rid of a got entry. */
4258 if (*got_count > 0)
4259 *got_count -= 1;
4260 }
4261
4262 if (expecting_tls_get_addr)
4263 {
4264 struct plt_entry *ent;
4265
4266 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4267 if (ent != NULL && ent->plt.refcount > 0)
4268 ent->plt.refcount -= 1;
4269 }
4270
4271 *tls_mask |= tls_set;
4272 *tls_mask &= ~tls_clear;
4273 }
4274
4275 if (elf_section_data (sec)->relocs != relstart)
4276 free (relstart);
4277 }
4278
4279 if (locsyms != NULL
4280 && (symtab_hdr->contents != (unsigned char *) locsyms))
4281 {
4282 if (!info->keep_memory)
4283 free (locsyms);
4284 else
4285 symtab_hdr->contents = (unsigned char *) locsyms;
4286 }
4287 }
4288 return TRUE;
4289 }
4290 \f
4291 /* Adjust a symbol defined by a dynamic object and referenced by a
4292 regular object. The current definition is in some section of the
4293 dynamic object, but we're not including those sections. We have to
4294 change the definition to something the rest of the link can
4295 understand. */
4296
4297 static bfd_boolean
4298 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4299 struct elf_link_hash_entry *h)
4300 {
4301 struct ppc_elf_link_hash_table *htab;
4302 asection *s;
4303
4304 #ifdef DEBUG
4305 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4306 h->root.root.string);
4307 #endif
4308
4309 /* Make sure we know what is going on here. */
4310 htab = ppc_elf_hash_table (info);
4311 BFD_ASSERT (htab->elf.dynobj != NULL
4312 && (h->needs_plt
4313 || h->u.weakdef != NULL
4314 || (h->def_dynamic
4315 && h->ref_regular
4316 && !h->def_regular)));
4317
4318 /* Deal with function syms. */
4319 if (h->type == STT_FUNC
4320 || h->needs_plt)
4321 {
4322 /* Clear procedure linkage table information for any symbol that
4323 won't need a .plt entry. */
4324 struct plt_entry *ent;
4325 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4326 if (ent->plt.refcount > 0)
4327 break;
4328 if (ent == NULL
4329 || SYMBOL_CALLS_LOCAL (info, h)
4330 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4331 && h->root.type == bfd_link_hash_undefweak))
4332 {
4333 /* A PLT entry is not required/allowed when:
4334
4335 1. We are not using ld.so; because then the PLT entry
4336 can't be set up, so we can't use one. In this case,
4337 ppc_elf_adjust_dynamic_symbol won't even be called.
4338
4339 2. GC has rendered the entry unused.
4340
4341 3. We know for certain that a call to this symbol
4342 will go to this object, or will remain undefined. */
4343 h->plt.plist = NULL;
4344 h->needs_plt = 0;
4345 }
4346 return TRUE;
4347 }
4348 else
4349 h->plt.plist = NULL;
4350
4351 /* If this is a weak symbol, and there is a real definition, the
4352 processor independent code will have arranged for us to see the
4353 real definition first, and we can just use the same value. */
4354 if (h->u.weakdef != NULL)
4355 {
4356 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4357 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4358 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4359 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4360 if (ELIMINATE_COPY_RELOCS)
4361 h->non_got_ref = h->u.weakdef->non_got_ref;
4362 return TRUE;
4363 }
4364
4365 /* This is a reference to a symbol defined by a dynamic object which
4366 is not a function. */
4367
4368 /* If we are creating a shared library, we must presume that the
4369 only references to the symbol are via the global offset table.
4370 For such cases we need not do anything here; the relocations will
4371 be handled correctly by relocate_section. */
4372 if (info->shared)
4373 return TRUE;
4374
4375 /* If there are no references to this symbol that do not use the
4376 GOT, we don't need to generate a copy reloc. */
4377 if (!h->non_got_ref)
4378 return TRUE;
4379
4380 /* If we didn't find any dynamic relocs in read-only sections, then
4381 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4382 We can't do this if there are any small data relocations. This
4383 doesn't work on VxWorks, where we can not have dynamic
4384 relocations (other than copy and jump slot relocations) in an
4385 executable. */
4386 if (ELIMINATE_COPY_RELOCS
4387 && !ppc_elf_hash_entry (h)->has_sda_refs
4388 && !htab->is_vxworks)
4389 {
4390 struct ppc_elf_dyn_relocs *p;
4391 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4392 {
4393 s = p->sec->output_section;
4394 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4395 break;
4396 }
4397
4398 if (p == NULL)
4399 {
4400 h->non_got_ref = 0;
4401 return TRUE;
4402 }
4403 }
4404
4405 if (h->size == 0)
4406 {
4407 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4408 h->root.root.string);
4409 return TRUE;
4410 }
4411
4412 /* We must allocate the symbol in our .dynbss section, which will
4413 become part of the .bss section of the executable. There will be
4414 an entry for this symbol in the .dynsym section. The dynamic
4415 object will contain position independent code, so all references
4416 from the dynamic object to this symbol will go through the global
4417 offset table. The dynamic linker will use the .dynsym entry to
4418 determine the address it must put in the global offset table, so
4419 both the dynamic object and the regular object will refer to the
4420 same memory location for the variable.
4421
4422 Of course, if the symbol is referenced using SDAREL relocs, we
4423 must instead allocate it in .sbss. */
4424
4425 if (ppc_elf_hash_entry (h)->has_sda_refs)
4426 s = htab->dynsbss;
4427 else
4428 s = htab->dynbss;
4429 BFD_ASSERT (s != NULL);
4430
4431 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4432 copy the initial value out of the dynamic object and into the
4433 runtime process image. We need to remember the offset into the
4434 .rela.bss section we are going to use. */
4435 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4436 {
4437 asection *srel;
4438
4439 if (ppc_elf_hash_entry (h)->has_sda_refs)
4440 srel = htab->relsbss;
4441 else
4442 srel = htab->relbss;
4443 BFD_ASSERT (srel != NULL);
4444 srel->size += sizeof (Elf32_External_Rela);
4445 h->needs_copy = 1;
4446 }
4447
4448 return _bfd_elf_adjust_dynamic_copy (h, s);
4449 }
4450 \f
4451 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4452 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4453 specifying the addend on the plt relocation. For -fpic code, the sym
4454 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4455 xxxxxxxx.got2.plt_pic32.<callee>. */
4456
4457 static bfd_boolean
4458 add_stub_sym (struct plt_entry *ent,
4459 struct elf_link_hash_entry *h,
4460 struct bfd_link_info *info)
4461 {
4462 struct elf_link_hash_entry *sh;
4463 size_t len1, len2, len3;
4464 char *name;
4465 const char *stub;
4466 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4467
4468 if (info->shared || info->pie)
4469 stub = ".plt_pic32.";
4470 else
4471 stub = ".plt_call32.";
4472
4473 len1 = strlen (h->root.root.string);
4474 len2 = strlen (stub);
4475 len3 = 0;
4476 if (ent->sec)
4477 len3 = strlen (ent->sec->name);
4478 name = bfd_malloc (len1 + len2 + len3 + 9);
4479 if (name == NULL)
4480 return FALSE;
4481 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4482 if (ent->sec)
4483 memcpy (name + 8, ent->sec->name, len3);
4484 memcpy (name + 8 + len3, stub, len2);
4485 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4486 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4487 if (sh == NULL)
4488 return FALSE;
4489 if (sh->root.type == bfd_link_hash_new)
4490 {
4491 sh->root.type = bfd_link_hash_defined;
4492 sh->root.u.def.section = htab->glink;
4493 sh->root.u.def.value = ent->glink_offset;
4494 sh->ref_regular = 1;
4495 sh->def_regular = 1;
4496 sh->ref_regular_nonweak = 1;
4497 sh->forced_local = 1;
4498 sh->non_elf = 0;
4499 }
4500 return TRUE;
4501 }
4502
4503 /* Allocate NEED contiguous space in .got, and return the offset.
4504 Handles allocation of the got header when crossing 32k. */
4505
4506 static bfd_vma
4507 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4508 {
4509 bfd_vma where;
4510 unsigned int max_before_header;
4511
4512 if (htab->plt_type == PLT_VXWORKS)
4513 {
4514 where = htab->got->size;
4515 htab->got->size += need;
4516 }
4517 else
4518 {
4519 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4520 if (need <= htab->got_gap)
4521 {
4522 where = max_before_header - htab->got_gap;
4523 htab->got_gap -= need;
4524 }
4525 else
4526 {
4527 if (htab->got->size + need > max_before_header
4528 && htab->got->size <= max_before_header)
4529 {
4530 htab->got_gap = max_before_header - htab->got->size;
4531 htab->got->size = max_before_header + htab->got_header_size;
4532 }
4533 where = htab->got->size;
4534 htab->got->size += need;
4535 }
4536 }
4537 return where;
4538 }
4539
4540 /* Allocate space in associated reloc sections for dynamic relocs. */
4541
4542 static bfd_boolean
4543 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4544 {
4545 struct bfd_link_info *info = inf;
4546 struct ppc_elf_link_hash_entry *eh;
4547 struct ppc_elf_link_hash_table *htab;
4548 struct ppc_elf_dyn_relocs *p;
4549
4550 if (h->root.type == bfd_link_hash_indirect)
4551 return TRUE;
4552
4553 if (h->root.type == bfd_link_hash_warning)
4554 /* When warning symbols are created, they **replace** the "real"
4555 entry in the hash table, thus we never get to see the real
4556 symbol in a hash traversal. So look at it now. */
4557 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4558
4559 htab = ppc_elf_hash_table (info);
4560 if (htab->elf.dynamic_sections_created)
4561 {
4562 struct plt_entry *ent;
4563 bfd_boolean doneone = FALSE;
4564 bfd_vma plt_offset = 0, glink_offset = 0;
4565
4566 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4567 if (ent->plt.refcount > 0)
4568 {
4569 /* Make sure this symbol is output as a dynamic symbol. */
4570 if (h->dynindx == -1
4571 && !h->forced_local)
4572 {
4573 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4574 return FALSE;
4575 }
4576
4577 if (info->shared
4578 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4579 {
4580 asection *s = htab->plt;
4581
4582 if (htab->plt_type == PLT_NEW)
4583 {
4584 if (!doneone)
4585 {
4586 plt_offset = s->size;
4587 s->size += 4;
4588 }
4589 ent->plt.offset = plt_offset;
4590
4591 s = htab->glink;
4592 if (!doneone || info->shared || info->pie)
4593 {
4594 glink_offset = s->size;
4595 s->size += GLINK_ENTRY_SIZE;
4596 }
4597 if (!doneone
4598 && !info->shared
4599 && !h->def_regular)
4600 {
4601 h->root.u.def.section = s;
4602 h->root.u.def.value = glink_offset;
4603 }
4604 ent->glink_offset = glink_offset;
4605
4606 if (htab->emit_stub_syms
4607 && !add_stub_sym (ent, h, info))
4608 return FALSE;
4609 }
4610 else
4611 {
4612 if (!doneone)
4613 {
4614 /* If this is the first .plt entry, make room
4615 for the special first entry. */
4616 if (s->size == 0)
4617 s->size += htab->plt_initial_entry_size;
4618
4619 /* The PowerPC PLT is actually composed of two
4620 parts, the first part is 2 words (for a load
4621 and a jump), and then there is a remaining
4622 word available at the end. */
4623 plt_offset = (htab->plt_initial_entry_size
4624 + (htab->plt_slot_size
4625 * ((s->size
4626 - htab->plt_initial_entry_size)
4627 / htab->plt_entry_size)));
4628
4629 /* If this symbol is not defined in a regular
4630 file, and we are not generating a shared
4631 library, then set the symbol to this location
4632 in the .plt. This is required to make
4633 function pointers compare as equal between
4634 the normal executable and the shared library. */
4635 if (! info->shared
4636 && !h->def_regular)
4637 {
4638 h->root.u.def.section = s;
4639 h->root.u.def.value = plt_offset;
4640 }
4641
4642 /* Make room for this entry. */
4643 s->size += htab->plt_entry_size;
4644 /* After the 8192nd entry, room for two entries
4645 is allocated. */
4646 if (htab->plt_type == PLT_OLD
4647 && (s->size - htab->plt_initial_entry_size)
4648 / htab->plt_entry_size
4649 > PLT_NUM_SINGLE_ENTRIES)
4650 s->size += htab->plt_entry_size;
4651 }
4652 ent->plt.offset = plt_offset;
4653 }
4654
4655 /* We also need to make an entry in the .rela.plt section. */
4656 if (!doneone)
4657 {
4658 htab->relplt->size += sizeof (Elf32_External_Rela);
4659
4660 if (htab->plt_type == PLT_VXWORKS)
4661 {
4662 /* Allocate space for the unloaded relocations. */
4663 if (!info->shared)
4664 {
4665 if (ent->plt.offset
4666 == (bfd_vma) htab->plt_initial_entry_size)
4667 {
4668 htab->srelplt2->size
4669 += sizeof (Elf32_External_Rela)
4670 * VXWORKS_PLTRESOLVE_RELOCS;
4671 }
4672
4673 htab->srelplt2->size
4674 += sizeof (Elf32_External_Rela)
4675 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4676 }
4677
4678 /* Every PLT entry has an associated GOT entry in
4679 .got.plt. */
4680 htab->sgotplt->size += 4;
4681 }
4682 doneone = TRUE;
4683 }
4684 }
4685 else
4686 ent->plt.offset = (bfd_vma) -1;
4687 }
4688 else
4689 ent->plt.offset = (bfd_vma) -1;
4690
4691 if (!doneone)
4692 {
4693 h->plt.plist = NULL;
4694 h->needs_plt = 0;
4695 }
4696 }
4697 else
4698 {
4699 h->plt.plist = NULL;
4700 h->needs_plt = 0;
4701 }
4702
4703 eh = (struct ppc_elf_link_hash_entry *) h;
4704 if (eh->elf.got.refcount > 0)
4705 {
4706 /* Make sure this symbol is output as a dynamic symbol. */
4707 if (eh->elf.dynindx == -1
4708 && !eh->elf.forced_local)
4709 {
4710 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4711 return FALSE;
4712 }
4713
4714 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4715 && !eh->elf.def_dynamic)
4716 {
4717 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4718 htab->tlsld_got.refcount += 1;
4719 eh->elf.got.offset = (bfd_vma) -1;
4720 }
4721 else
4722 {
4723 bfd_boolean dyn;
4724 unsigned int need = 0;
4725 if ((eh->tls_mask & TLS_TLS) != 0)
4726 {
4727 if ((eh->tls_mask & TLS_LD) != 0)
4728 need += 8;
4729 if ((eh->tls_mask & TLS_GD) != 0)
4730 need += 8;
4731 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4732 need += 4;
4733 if ((eh->tls_mask & TLS_DTPREL) != 0)
4734 need += 4;
4735 }
4736 else
4737 need += 4;
4738 eh->elf.got.offset = allocate_got (htab, need);
4739 dyn = htab->elf.dynamic_sections_created;
4740 if ((info->shared
4741 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4742 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4743 || eh->elf.root.type != bfd_link_hash_undefweak))
4744 {
4745 /* All the entries we allocated need relocs.
4746 Except LD only needs one. */
4747 if ((eh->tls_mask & TLS_LD) != 0)
4748 need -= 4;
4749 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4750 }
4751 }
4752 }
4753 else
4754 eh->elf.got.offset = (bfd_vma) -1;
4755
4756 if (eh->dyn_relocs == NULL)
4757 return TRUE;
4758
4759 /* In the shared -Bsymbolic case, discard space allocated for
4760 dynamic pc-relative relocs against symbols which turn out to be
4761 defined in regular objects. For the normal shared case, discard
4762 space for relocs that have become local due to symbol visibility
4763 changes. */
4764
4765 if (info->shared)
4766 {
4767 /* Relocs that use pc_count are those that appear on a call insn,
4768 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4769 generated via assembly. We want calls to protected symbols to
4770 resolve directly to the function rather than going via the plt.
4771 If people want function pointer comparisons to work as expected
4772 then they should avoid writing weird assembly. */
4773 if (SYMBOL_CALLS_LOCAL (info, h))
4774 {
4775 struct ppc_elf_dyn_relocs **pp;
4776
4777 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4778 {
4779 p->count -= p->pc_count;
4780 p->pc_count = 0;
4781 if (p->count == 0)
4782 *pp = p->next;
4783 else
4784 pp = &p->next;
4785 }
4786 }
4787
4788 /* Also discard relocs on undefined weak syms with non-default
4789 visibility. */
4790 if (eh->dyn_relocs != NULL
4791 && h->root.type == bfd_link_hash_undefweak)
4792 {
4793 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4794 eh->dyn_relocs = NULL;
4795
4796 /* Make sure undefined weak symbols are output as a dynamic
4797 symbol in PIEs. */
4798 else if (h->dynindx == -1
4799 && !h->forced_local)
4800 {
4801 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4802 return FALSE;
4803 }
4804 }
4805 }
4806 else if (ELIMINATE_COPY_RELOCS)
4807 {
4808 /* For the non-shared case, discard space for relocs against
4809 symbols which turn out to need copy relocs or are not
4810 dynamic. */
4811
4812 if (!h->non_got_ref
4813 && h->def_dynamic
4814 && !h->def_regular)
4815 {
4816 /* Make sure this symbol is output as a dynamic symbol.
4817 Undefined weak syms won't yet be marked as dynamic. */
4818 if (h->dynindx == -1
4819 && !h->forced_local)
4820 {
4821 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4822 return FALSE;
4823 }
4824
4825 /* If that succeeded, we know we'll be keeping all the
4826 relocs. */
4827 if (h->dynindx != -1)
4828 goto keep;
4829 }
4830
4831 eh->dyn_relocs = NULL;
4832
4833 keep: ;
4834 }
4835
4836 /* Finally, allocate space. */
4837 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4838 {
4839 asection *sreloc = elf_section_data (p->sec)->sreloc;
4840 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4841 }
4842
4843 return TRUE;
4844 }
4845
4846 /* Find any dynamic relocs that apply to read-only sections. */
4847
4848 static bfd_boolean
4849 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4850 {
4851 struct ppc_elf_dyn_relocs *p;
4852
4853 if (h->root.type == bfd_link_hash_indirect)
4854 return TRUE;
4855
4856 if (h->root.type == bfd_link_hash_warning)
4857 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4858
4859 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4860 {
4861 asection *s = p->sec->output_section;
4862
4863 if (s != NULL
4864 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4865 == (SEC_READONLY | SEC_ALLOC)))
4866 {
4867 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4868
4869 /* Not an error, just cut short the traversal. */
4870 return FALSE;
4871 }
4872 }
4873 return TRUE;
4874 }
4875
4876 /* Set the sizes of the dynamic sections. */
4877
4878 static bfd_boolean
4879 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4880 struct bfd_link_info *info)
4881 {
4882 struct ppc_elf_link_hash_table *htab;
4883 asection *s;
4884 bfd_boolean relocs;
4885 bfd *ibfd;
4886
4887 #ifdef DEBUG
4888 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4889 #endif
4890
4891 htab = ppc_elf_hash_table (info);
4892 BFD_ASSERT (htab->elf.dynobj != NULL);
4893
4894 if (elf_hash_table (info)->dynamic_sections_created)
4895 {
4896 /* Set the contents of the .interp section to the interpreter. */
4897 if (info->executable)
4898 {
4899 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4900 BFD_ASSERT (s != NULL);
4901 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4902 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4903 }
4904 }
4905
4906 if (htab->plt_type == PLT_OLD)
4907 htab->got_header_size = 16;
4908 else if (htab->plt_type == PLT_NEW)
4909 htab->got_header_size = 12;
4910
4911 /* Set up .got offsets for local syms, and space for local dynamic
4912 relocs. */
4913 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4914 {
4915 bfd_signed_vma *local_got;
4916 bfd_signed_vma *end_local_got;
4917 char *lgot_masks;
4918 bfd_size_type locsymcount;
4919 Elf_Internal_Shdr *symtab_hdr;
4920
4921 if (!is_ppc_elf_target (ibfd->xvec))
4922 continue;
4923
4924 for (s = ibfd->sections; s != NULL; s = s->next)
4925 {
4926 struct ppc_elf_dyn_relocs *p;
4927
4928 for (p = ((struct ppc_elf_dyn_relocs *)
4929 elf_section_data (s)->local_dynrel);
4930 p != NULL;
4931 p = p->next)
4932 {
4933 if (!bfd_is_abs_section (p->sec)
4934 && bfd_is_abs_section (p->sec->output_section))
4935 {
4936 /* Input section has been discarded, either because
4937 it is a copy of a linkonce section or due to
4938 linker script /DISCARD/, so we'll be discarding
4939 the relocs too. */
4940 }
4941 else if (p->count != 0)
4942 {
4943 elf_section_data (p->sec)->sreloc->size
4944 += p->count * sizeof (Elf32_External_Rela);
4945 if ((p->sec->output_section->flags
4946 & (SEC_READONLY | SEC_ALLOC))
4947 == (SEC_READONLY | SEC_ALLOC))
4948 info->flags |= DF_TEXTREL;
4949 }
4950 }
4951 }
4952
4953 local_got = elf_local_got_refcounts (ibfd);
4954 if (!local_got)
4955 continue;
4956
4957 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4958 locsymcount = symtab_hdr->sh_info;
4959 end_local_got = local_got + locsymcount;
4960 lgot_masks = (char *) end_local_got;
4961 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4962 if (*local_got > 0)
4963 {
4964 if (*lgot_masks == (TLS_TLS | TLS_LD))
4965 {
4966 /* If just an LD reloc, we'll just use
4967 htab->tlsld_got.offset. */
4968 htab->tlsld_got.refcount += 1;
4969 *local_got = (bfd_vma) -1;
4970 }
4971 else
4972 {
4973 unsigned int need = 0;
4974 if ((*lgot_masks & TLS_TLS) != 0)
4975 {
4976 if ((*lgot_masks & TLS_GD) != 0)
4977 need += 8;
4978 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4979 need += 4;
4980 if ((*lgot_masks & TLS_DTPREL) != 0)
4981 need += 4;
4982 }
4983 else
4984 need += 4;
4985 *local_got = allocate_got (htab, need);
4986 if (info->shared)
4987 htab->relgot->size += (need
4988 * (sizeof (Elf32_External_Rela) / 4));
4989 }
4990 }
4991 else
4992 *local_got = (bfd_vma) -1;
4993 }
4994
4995 /* Allocate space for global sym dynamic relocs. */
4996 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4997
4998 if (htab->tlsld_got.refcount > 0)
4999 {
5000 htab->tlsld_got.offset = allocate_got (htab, 8);
5001 if (info->shared)
5002 htab->relgot->size += sizeof (Elf32_External_Rela);
5003 }
5004 else
5005 htab->tlsld_got.offset = (bfd_vma) -1;
5006
5007 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5008 {
5009 unsigned int g_o_t = 32768;
5010
5011 /* If we haven't allocated the header, do so now. When we get here,
5012 for old plt/got the got size will be 0 to 32764 (not allocated),
5013 or 32780 to 65536 (header allocated). For new plt/got, the
5014 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5015 if (htab->got->size <= 32768)
5016 {
5017 g_o_t = htab->got->size;
5018 if (htab->plt_type == PLT_OLD)
5019 g_o_t += 4;
5020 htab->got->size += htab->got_header_size;
5021 }
5022
5023 htab->elf.hgot->root.u.def.value = g_o_t;
5024 }
5025
5026 if (htab->glink != NULL && htab->glink->size != 0)
5027 {
5028 htab->glink_pltresolve = htab->glink->size;
5029 /* Space for the branch table. */
5030 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5031 /* Pad out to align the start of PLTresolve. */
5032 htab->glink->size += -htab->glink->size & 15;
5033 htab->glink->size += GLINK_PLTRESOLVE;
5034
5035 if (htab->emit_stub_syms)
5036 {
5037 struct elf_link_hash_entry *sh;
5038 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5039 TRUE, FALSE, FALSE);
5040 if (sh == NULL)
5041 return FALSE;
5042 if (sh->root.type == bfd_link_hash_new)
5043 {
5044 sh->root.type = bfd_link_hash_defined;
5045 sh->root.u.def.section = htab->glink;
5046 sh->root.u.def.value = htab->glink_pltresolve;
5047 sh->ref_regular = 1;
5048 sh->def_regular = 1;
5049 sh->ref_regular_nonweak = 1;
5050 sh->forced_local = 1;
5051 sh->non_elf = 0;
5052 }
5053 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5054 TRUE, FALSE, FALSE);
5055 if (sh == NULL)
5056 return FALSE;
5057 if (sh->root.type == bfd_link_hash_new)
5058 {
5059 sh->root.type = bfd_link_hash_defined;
5060 sh->root.u.def.section = htab->glink;
5061 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5062 sh->ref_regular = 1;
5063 sh->def_regular = 1;
5064 sh->ref_regular_nonweak = 1;
5065 sh->forced_local = 1;
5066 sh->non_elf = 0;
5067 }
5068 }
5069 }
5070
5071 /* We've now determined the sizes of the various dynamic sections.
5072 Allocate memory for them. */
5073 relocs = FALSE;
5074 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5075 {
5076 bfd_boolean strip_section = TRUE;
5077
5078 if ((s->flags & SEC_LINKER_CREATED) == 0)
5079 continue;
5080
5081 if (s == htab->plt
5082 || s == htab->glink
5083 || s == htab->got
5084 || s == htab->sgotplt
5085 || s == htab->sbss
5086 || s == htab->dynbss
5087 || s == htab->dynsbss)
5088 {
5089 /* We'd like to strip these sections if they aren't needed, but if
5090 we've exported dynamic symbols from them we must leave them.
5091 It's too late to tell BFD to get rid of the symbols. */
5092 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5093 strip_section = FALSE;
5094 /* Strip this section if we don't need it; see the
5095 comment below. */
5096 }
5097 else if (s == htab->sdata[0].section
5098 || s == htab->sdata[1].section)
5099 {
5100 /* Strip these too. */
5101 }
5102 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5103 {
5104 if (s->size != 0)
5105 {
5106 /* Remember whether there are any relocation sections. */
5107 relocs = TRUE;
5108
5109 /* We use the reloc_count field as a counter if we need
5110 to copy relocs into the output file. */
5111 s->reloc_count = 0;
5112 }
5113 }
5114 else
5115 {
5116 /* It's not one of our sections, so don't allocate space. */
5117 continue;
5118 }
5119
5120 if (s->size == 0 && strip_section)
5121 {
5122 /* If we don't need this section, strip it from the
5123 output file. This is mostly to handle .rela.bss and
5124 .rela.plt. We must create both sections in
5125 create_dynamic_sections, because they must be created
5126 before the linker maps input sections to output
5127 sections. The linker does that before
5128 adjust_dynamic_symbol is called, and it is that
5129 function which decides whether anything needs to go
5130 into these sections. */
5131 s->flags |= SEC_EXCLUDE;
5132 continue;
5133 }
5134
5135 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5136 continue;
5137
5138 /* Allocate memory for the section contents. */
5139 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5140 if (s->contents == NULL)
5141 return FALSE;
5142 }
5143
5144 if (htab->elf.dynamic_sections_created)
5145 {
5146 /* Add some entries to the .dynamic section. We fill in the
5147 values later, in ppc_elf_finish_dynamic_sections, but we
5148 must add the entries now so that we get the correct size for
5149 the .dynamic section. The DT_DEBUG entry is filled in by the
5150 dynamic linker and used by the debugger. */
5151 #define add_dynamic_entry(TAG, VAL) \
5152 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5153
5154 if (info->executable)
5155 {
5156 if (!add_dynamic_entry (DT_DEBUG, 0))
5157 return FALSE;
5158 }
5159
5160 if (htab->plt != NULL && htab->plt->size != 0)
5161 {
5162 if (!add_dynamic_entry (DT_PLTGOT, 0)
5163 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5164 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5165 || !add_dynamic_entry (DT_JMPREL, 0))
5166 return FALSE;
5167 }
5168
5169 if (htab->glink != NULL && htab->glink->size != 0)
5170 {
5171 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5172 return FALSE;
5173 }
5174
5175 if (relocs)
5176 {
5177 if (!add_dynamic_entry (DT_RELA, 0)
5178 || !add_dynamic_entry (DT_RELASZ, 0)
5179 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5180 return FALSE;
5181 }
5182
5183 /* If any dynamic relocs apply to a read-only section, then we
5184 need a DT_TEXTREL entry. */
5185 if ((info->flags & DF_TEXTREL) == 0)
5186 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5187 info);
5188
5189 if ((info->flags & DF_TEXTREL) != 0)
5190 {
5191 if (!add_dynamic_entry (DT_TEXTREL, 0))
5192 return FALSE;
5193 }
5194 if (htab->is_vxworks
5195 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5196 return FALSE;
5197 }
5198 #undef add_dynamic_entry
5199
5200 return TRUE;
5201 }
5202 \f
5203 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5204
5205 static const int shared_stub_entry[] =
5206 {
5207 0x7c0802a6, /* mflr 0 */
5208 0x429f0005, /* bcl 20, 31, .Lxxx */
5209 0x7d6802a6, /* mflr 11 */
5210 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5211 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5212 0x7c0803a6, /* mtlr 0 */
5213 0x7d6903a6, /* mtctr 11 */
5214 0x4e800420, /* bctr */
5215 };
5216
5217 static const int stub_entry[] =
5218 {
5219 0x3d600000, /* lis 11,xxx@ha */
5220 0x396b0000, /* addi 11,11,xxx@l */
5221 0x7d6903a6, /* mtctr 11 */
5222 0x4e800420, /* bctr */
5223 };
5224
5225 static bfd_boolean
5226 ppc_elf_relax_section (bfd *abfd,
5227 asection *isec,
5228 struct bfd_link_info *link_info,
5229 bfd_boolean *again)
5230 {
5231 struct one_fixup
5232 {
5233 struct one_fixup *next;
5234 asection *tsec;
5235 bfd_vma toff;
5236 bfd_vma trampoff;
5237 };
5238
5239 Elf_Internal_Shdr *symtab_hdr;
5240 bfd_byte *contents = NULL;
5241 Elf_Internal_Sym *isymbuf = NULL;
5242 Elf_Internal_Rela *internal_relocs = NULL;
5243 Elf_Internal_Rela *irel, *irelend;
5244 struct one_fixup *fixups = NULL;
5245 bfd_boolean changed;
5246 struct ppc_elf_link_hash_table *htab;
5247 bfd_size_type trampoff;
5248 asection *got2;
5249
5250 *again = FALSE;
5251
5252 /* Nothing to do if there are no relocations, and no need to do
5253 anything with non-alloc sections. */
5254 if ((isec->flags & SEC_ALLOC) == 0
5255 || (isec->flags & SEC_RELOC) == 0
5256 || isec->reloc_count == 0)
5257 return TRUE;
5258
5259 trampoff = (isec->size + 3) & (bfd_vma) -4;
5260 /* Space for a branch around any trampolines. */
5261 trampoff += 4;
5262
5263 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5264
5265 /* Get a copy of the native relocations. */
5266 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5267 link_info->keep_memory);
5268 if (internal_relocs == NULL)
5269 goto error_return;
5270
5271 htab = ppc_elf_hash_table (link_info);
5272 got2 = bfd_get_section_by_name (abfd, ".got2");
5273
5274 irelend = internal_relocs + isec->reloc_count;
5275 for (irel = internal_relocs; irel < irelend; irel++)
5276 {
5277 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5278 bfd_vma symaddr, reladdr, toff, roff;
5279 asection *tsec;
5280 struct one_fixup *f;
5281 size_t insn_offset = 0;
5282 bfd_vma max_branch_offset, val;
5283 bfd_byte *hit_addr;
5284 unsigned long t0;
5285 unsigned char sym_type;
5286
5287 switch (r_type)
5288 {
5289 case R_PPC_REL24:
5290 case R_PPC_LOCAL24PC:
5291 case R_PPC_PLTREL24:
5292 max_branch_offset = 1 << 25;
5293 break;
5294
5295 case R_PPC_REL14:
5296 case R_PPC_REL14_BRTAKEN:
5297 case R_PPC_REL14_BRNTAKEN:
5298 max_branch_offset = 1 << 15;
5299 break;
5300
5301 default:
5302 continue;
5303 }
5304
5305 /* Get the value of the symbol referred to by the reloc. */
5306 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5307 {
5308 /* A local symbol. */
5309 Elf_Internal_Sym *isym;
5310
5311 /* Read this BFD's local symbols. */
5312 if (isymbuf == NULL)
5313 {
5314 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5315 if (isymbuf == NULL)
5316 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5317 symtab_hdr->sh_info, 0,
5318 NULL, NULL, NULL);
5319 if (isymbuf == 0)
5320 goto error_return;
5321 }
5322 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5323 if (isym->st_shndx == SHN_UNDEF)
5324 continue; /* We can't do anything with undefined symbols. */
5325 else if (isym->st_shndx == SHN_ABS)
5326 tsec = bfd_abs_section_ptr;
5327 else if (isym->st_shndx == SHN_COMMON)
5328 tsec = bfd_com_section_ptr;
5329 else
5330 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5331
5332 toff = isym->st_value;
5333 sym_type = ELF_ST_TYPE (isym->st_info);
5334 }
5335 else
5336 {
5337 /* Global symbol handling. */
5338 unsigned long indx;
5339 struct elf_link_hash_entry *h;
5340
5341 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5342 h = elf_sym_hashes (abfd)[indx];
5343
5344 while (h->root.type == bfd_link_hash_indirect
5345 || h->root.type == bfd_link_hash_warning)
5346 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5347
5348 tsec = NULL;
5349 toff = 0;
5350 if (r_type == R_PPC_PLTREL24
5351 && htab->plt != NULL)
5352 {
5353 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5354
5355 if (ent != NULL)
5356 {
5357 if (htab->plt_type == PLT_NEW)
5358 {
5359 tsec = htab->glink;
5360 toff = ent->glink_offset;
5361 }
5362 else
5363 {
5364 tsec = htab->plt;
5365 toff = ent->plt.offset;
5366 }
5367 }
5368 }
5369 if (tsec != NULL)
5370 ;
5371 else if (h->root.type == bfd_link_hash_defined
5372 || h->root.type == bfd_link_hash_defweak)
5373 {
5374 tsec = h->root.u.def.section;
5375 toff = h->root.u.def.value;
5376 }
5377 else
5378 continue;
5379
5380 sym_type = h->type;
5381 }
5382
5383 /* If the branch and target are in the same section, you have
5384 no hope of adding stubs. We'll error out later should the
5385 branch overflow. */
5386 if (tsec == isec)
5387 continue;
5388
5389 /* There probably isn't any reason to handle symbols in
5390 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5391 attribute for a code section, and we are only looking at
5392 branches. However, implement it correctly here as a
5393 reference for other target relax_section functions. */
5394 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5395 {
5396 /* At this stage in linking, no SEC_MERGE symbol has been
5397 adjusted, so all references to such symbols need to be
5398 passed through _bfd_merged_section_offset. (Later, in
5399 relocate_section, all SEC_MERGE symbols *except* for
5400 section symbols have been adjusted.)
5401
5402 gas may reduce relocations against symbols in SEC_MERGE
5403 sections to a relocation against the section symbol when
5404 the original addend was zero. When the reloc is against
5405 a section symbol we should include the addend in the
5406 offset passed to _bfd_merged_section_offset, since the
5407 location of interest is the original symbol. On the
5408 other hand, an access to "sym+addend" where "sym" is not
5409 a section symbol should not include the addend; Such an
5410 access is presumed to be an offset from "sym"; The
5411 location of interest is just "sym". */
5412 if (sym_type == STT_SECTION)
5413 toff += irel->r_addend;
5414
5415 toff = _bfd_merged_section_offset (abfd, &tsec,
5416 elf_section_data (tsec)->sec_info,
5417 toff);
5418
5419 if (sym_type != STT_SECTION)
5420 toff += irel->r_addend;
5421 }
5422 /* PLTREL24 addends are special. */
5423 else if (r_type != R_PPC_PLTREL24)
5424 toff += irel->r_addend;
5425
5426 /* Attempted -shared link of non-pic code loses. */
5427 if (tsec->output_section == NULL)
5428 continue;
5429
5430 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5431
5432 roff = irel->r_offset;
5433 reladdr = isec->output_section->vma + isec->output_offset + roff;
5434
5435 /* If the branch is in range, no need to do anything. */
5436 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5437 continue;
5438
5439 /* Look for an existing fixup to this address. */
5440 for (f = fixups; f ; f = f->next)
5441 if (f->tsec == tsec && f->toff == toff)
5442 break;
5443
5444 if (f == NULL)
5445 {
5446 size_t size;
5447 unsigned long stub_rtype;
5448
5449 val = trampoff - roff;
5450 if (val >= max_branch_offset)
5451 /* Oh dear, we can't reach a trampoline. Don't try to add
5452 one. We'll report an error later. */
5453 continue;
5454
5455 if (link_info->shared)
5456 {
5457 size = 4 * ARRAY_SIZE (shared_stub_entry);
5458 insn_offset = 12;
5459 stub_rtype = R_PPC_RELAX32PC;
5460 }
5461 else
5462 {
5463 size = 4 * ARRAY_SIZE (stub_entry);
5464 insn_offset = 0;
5465 stub_rtype = R_PPC_RELAX32;
5466 }
5467
5468 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5469 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5470 abort ();
5471 if (tsec == htab->plt
5472 || tsec == htab->glink)
5473 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5474
5475 /* Hijack the old relocation. Since we need two
5476 relocations for this use a "composite" reloc. */
5477 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5478 stub_rtype);
5479 irel->r_offset = trampoff + insn_offset;
5480
5481 /* Record the fixup so we don't do it again this section. */
5482 f = bfd_malloc (sizeof (*f));
5483 f->next = fixups;
5484 f->tsec = tsec;
5485 f->toff = toff;
5486 f->trampoff = trampoff;
5487 fixups = f;
5488
5489 trampoff += size;
5490 }
5491 else
5492 {
5493 val = f->trampoff - roff;
5494 if (val >= max_branch_offset)
5495 continue;
5496
5497 /* Nop out the reloc, since we're finalizing things here. */
5498 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5499 }
5500
5501 /* Get the section contents. */
5502 if (contents == NULL)
5503 {
5504 /* Get cached copy if it exists. */
5505 if (elf_section_data (isec)->this_hdr.contents != NULL)
5506 contents = elf_section_data (isec)->this_hdr.contents;
5507 else
5508 {
5509 /* Go get them off disk. */
5510 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5511 goto error_return;
5512 }
5513 }
5514
5515 /* Fix up the existing branch to hit the trampoline. */
5516 hit_addr = contents + roff;
5517 switch (r_type)
5518 {
5519 case R_PPC_REL24:
5520 case R_PPC_LOCAL24PC:
5521 case R_PPC_PLTREL24:
5522 t0 = bfd_get_32 (abfd, hit_addr);
5523 t0 &= ~0x3fffffc;
5524 t0 |= val & 0x3fffffc;
5525 bfd_put_32 (abfd, t0, hit_addr);
5526 break;
5527
5528 case R_PPC_REL14:
5529 case R_PPC_REL14_BRTAKEN:
5530 case R_PPC_REL14_BRNTAKEN:
5531 t0 = bfd_get_32 (abfd, hit_addr);
5532 t0 &= ~0xfffc;
5533 t0 |= val & 0xfffc;
5534 bfd_put_32 (abfd, t0, hit_addr);
5535 break;
5536 }
5537 }
5538
5539 /* Write out the trampolines. */
5540 changed = fixups != NULL;
5541 if (fixups != NULL)
5542 {
5543 const int *stub;
5544 bfd_byte *dest;
5545 bfd_vma val;
5546 int i, size;
5547
5548 do
5549 {
5550 struct one_fixup *f = fixups;
5551 fixups = fixups->next;
5552 free (f);
5553 }
5554 while (fixups);
5555
5556 contents = bfd_realloc (contents, trampoff);
5557 if (contents == NULL)
5558 goto error_return;
5559
5560 isec->size = (isec->size + 3) & (bfd_vma) -4;
5561 /* Branch around the trampolines. */
5562 val = trampoff - isec->size + 0x48000000;
5563 dest = contents + isec->size;
5564 isec->size = trampoff;
5565 bfd_put_32 (abfd, val, dest);
5566 dest += 4;
5567
5568 if (link_info->shared)
5569 {
5570 stub = shared_stub_entry;
5571 size = ARRAY_SIZE (shared_stub_entry);
5572 }
5573 else
5574 {
5575 stub = stub_entry;
5576 size = ARRAY_SIZE (stub_entry);
5577 }
5578
5579 i = 0;
5580 while (dest < contents + trampoff)
5581 {
5582 bfd_put_32 (abfd, stub[i], dest);
5583 i++;
5584 if (i == size)
5585 i = 0;
5586 dest += 4;
5587 }
5588 BFD_ASSERT (i == 0);
5589 }
5590
5591 if (isymbuf != NULL
5592 && symtab_hdr->contents != (unsigned char *) isymbuf)
5593 {
5594 if (! link_info->keep_memory)
5595 free (isymbuf);
5596 else
5597 {
5598 /* Cache the symbols for elf_link_input_bfd. */
5599 symtab_hdr->contents = (unsigned char *) isymbuf;
5600 }
5601 }
5602
5603 if (contents != NULL
5604 && elf_section_data (isec)->this_hdr.contents != contents)
5605 {
5606 if (!changed && !link_info->keep_memory)
5607 free (contents);
5608 else
5609 {
5610 /* Cache the section contents for elf_link_input_bfd. */
5611 elf_section_data (isec)->this_hdr.contents = contents;
5612 }
5613 }
5614
5615 if (elf_section_data (isec)->relocs != internal_relocs)
5616 {
5617 if (!changed)
5618 free (internal_relocs);
5619 else
5620 elf_section_data (isec)->relocs = internal_relocs;
5621 }
5622
5623 *again = changed;
5624 return TRUE;
5625
5626 error_return:
5627 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5628 free (isymbuf);
5629 if (contents != NULL
5630 && elf_section_data (isec)->this_hdr.contents != contents)
5631 free (contents);
5632 if (internal_relocs != NULL
5633 && elf_section_data (isec)->relocs != internal_relocs)
5634 free (internal_relocs);
5635 return FALSE;
5636 }
5637 \f
5638 /* What to do when ld finds relocations against symbols defined in
5639 discarded sections. */
5640
5641 static unsigned int
5642 ppc_elf_action_discarded (asection *sec)
5643 {
5644 if (strcmp (".fixup", sec->name) == 0)
5645 return 0;
5646
5647 if (strcmp (".got2", sec->name) == 0)
5648 return 0;
5649
5650 return _bfd_elf_default_action_discarded (sec);
5651 }
5652 \f
5653 /* Fill in the address for a pointer generated in a linker section. */
5654
5655 static bfd_vma
5656 elf_finish_pointer_linker_section (bfd *input_bfd,
5657 elf_linker_section_t *lsect,
5658 struct elf_link_hash_entry *h,
5659 bfd_vma relocation,
5660 const Elf_Internal_Rela *rel)
5661 {
5662 elf_linker_section_pointers_t *linker_section_ptr;
5663
5664 BFD_ASSERT (lsect != NULL);
5665
5666 if (h != NULL)
5667 {
5668 /* Handle global symbol. */
5669 struct ppc_elf_link_hash_entry *eh;
5670
5671 eh = (struct ppc_elf_link_hash_entry *) h;
5672 BFD_ASSERT (eh->elf.def_regular);
5673 linker_section_ptr = eh->linker_section_pointer;
5674 }
5675 else
5676 {
5677 /* Handle local symbol. */
5678 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5679
5680 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5681 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5682 }
5683
5684 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5685 rel->r_addend,
5686 lsect);
5687 BFD_ASSERT (linker_section_ptr != NULL);
5688
5689 /* Offset will always be a multiple of four, so use the bottom bit
5690 as a "written" flag. */
5691 if ((linker_section_ptr->offset & 1) == 0)
5692 {
5693 bfd_put_32 (lsect->section->owner,
5694 relocation + linker_section_ptr->addend,
5695 lsect->section->contents + linker_section_ptr->offset);
5696 linker_section_ptr->offset += 1;
5697 }
5698
5699 relocation = (lsect->section->output_offset
5700 + linker_section_ptr->offset - 1
5701 - 0x8000);
5702
5703 #ifdef DEBUG
5704 fprintf (stderr,
5705 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5706 lsect->name, (long) relocation, (long) relocation);
5707 #endif
5708
5709 /* Subtract out the addend, because it will get added back in by the normal
5710 processing. */
5711 return relocation - linker_section_ptr->addend;
5712 }
5713
5714 /* The RELOCATE_SECTION function is called by the ELF backend linker
5715 to handle the relocations for a section.
5716
5717 The relocs are always passed as Rela structures; if the section
5718 actually uses Rel structures, the r_addend field will always be
5719 zero.
5720
5721 This function is responsible for adjust the section contents as
5722 necessary, and (if using Rela relocs and generating a
5723 relocatable output file) adjusting the reloc addend as
5724 necessary.
5725
5726 This function does not have to worry about setting the reloc
5727 address or the reloc symbol index.
5728
5729 LOCAL_SYMS is a pointer to the swapped in local symbols.
5730
5731 LOCAL_SECTIONS is an array giving the section in the input file
5732 corresponding to the st_shndx field of each local symbol.
5733
5734 The global hash table entry for the global symbols can be found
5735 via elf_sym_hashes (input_bfd).
5736
5737 When generating relocatable output, this function must handle
5738 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5739 going to be the section symbol corresponding to the output
5740 section, which means that the addend must be adjusted
5741 accordingly. */
5742
5743 static bfd_boolean
5744 ppc_elf_relocate_section (bfd *output_bfd,
5745 struct bfd_link_info *info,
5746 bfd *input_bfd,
5747 asection *input_section,
5748 bfd_byte *contents,
5749 Elf_Internal_Rela *relocs,
5750 Elf_Internal_Sym *local_syms,
5751 asection **local_sections)
5752 {
5753 Elf_Internal_Shdr *symtab_hdr;
5754 struct elf_link_hash_entry **sym_hashes;
5755 struct ppc_elf_link_hash_table *htab;
5756 Elf_Internal_Rela *rel;
5757 Elf_Internal_Rela *relend;
5758 Elf_Internal_Rela outrel;
5759 bfd_byte *loc;
5760 asection *got2, *sreloc = NULL;
5761 bfd_vma *local_got_offsets;
5762 bfd_boolean ret = TRUE;
5763 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5764
5765 #ifdef DEBUG
5766 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5767 "%ld relocations%s",
5768 input_bfd, input_section,
5769 (long) input_section->reloc_count,
5770 (info->relocatable) ? " (relocatable)" : "");
5771 #endif
5772
5773 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5774
5775 /* Initialize howto table if not already done. */
5776 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5777 ppc_elf_howto_init ();
5778
5779 htab = ppc_elf_hash_table (info);
5780 local_got_offsets = elf_local_got_offsets (input_bfd);
5781 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5782 sym_hashes = elf_sym_hashes (input_bfd);
5783 rel = relocs;
5784 relend = relocs + input_section->reloc_count;
5785 for (; rel < relend; rel++)
5786 {
5787 enum elf_ppc_reloc_type r_type;
5788 bfd_vma addend;
5789 bfd_reloc_status_type r;
5790 Elf_Internal_Sym *sym;
5791 asection *sec;
5792 struct elf_link_hash_entry *h;
5793 const char *sym_name;
5794 reloc_howto_type *howto;
5795 unsigned long r_symndx;
5796 bfd_vma relocation;
5797 bfd_vma branch_bit, insn, from;
5798 bfd_boolean unresolved_reloc;
5799 bfd_boolean warned;
5800 unsigned int tls_type, tls_mask, tls_gd;
5801
5802 r_type = ELF32_R_TYPE (rel->r_info);
5803 sym = NULL;
5804 sec = NULL;
5805 h = NULL;
5806 unresolved_reloc = FALSE;
5807 warned = FALSE;
5808 r_symndx = ELF32_R_SYM (rel->r_info);
5809
5810 if (r_symndx < symtab_hdr->sh_info)
5811 {
5812 sym = local_syms + r_symndx;
5813 sec = local_sections[r_symndx];
5814 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5815
5816 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5817 }
5818 else
5819 {
5820 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5821 r_symndx, symtab_hdr, sym_hashes,
5822 h, sec, relocation,
5823 unresolved_reloc, warned);
5824
5825 sym_name = h->root.root.string;
5826 }
5827
5828 if (sec != NULL && elf_discarded_section (sec))
5829 {
5830 /* For relocs against symbols from removed linkonce sections,
5831 or sections discarded by a linker script, we just want the
5832 section contents zeroed. Avoid any special processing. */
5833 howto = NULL;
5834 if (r_type < R_PPC_max)
5835 howto = ppc_elf_howto_table[r_type];
5836 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5837 rel->r_info = 0;
5838 rel->r_addend = 0;
5839 continue;
5840 }
5841
5842 if (info->relocatable)
5843 {
5844 if (got2 != NULL
5845 && r_type == R_PPC_PLTREL24
5846 && rel->r_addend >= 32768)
5847 {
5848 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5849 addend specifies the GOT pointer offset within .got2. */
5850 rel->r_addend += got2->output_offset;
5851 }
5852 continue;
5853 }
5854
5855 /* TLS optimizations. Replace instruction sequences and relocs
5856 based on information we collected in tls_optimize. We edit
5857 RELOCS so that --emit-relocs will output something sensible
5858 for the final instruction stream. */
5859 tls_mask = 0;
5860 tls_gd = 0;
5861 if (IS_PPC_TLS_RELOC (r_type))
5862 {
5863 if (h != NULL)
5864 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5865 else if (local_got_offsets != NULL)
5866 {
5867 char *lgot_masks;
5868 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5869 tls_mask = lgot_masks[r_symndx];
5870 }
5871 }
5872
5873 /* Ensure reloc mapping code below stays sane. */
5874 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5875 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5876 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5877 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5878 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5879 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5880 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5881 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5882 abort ();
5883 switch (r_type)
5884 {
5885 default:
5886 break;
5887
5888 case R_PPC_GOT_TPREL16:
5889 case R_PPC_GOT_TPREL16_LO:
5890 if (tls_mask != 0
5891 && (tls_mask & TLS_TPREL) == 0)
5892 {
5893 bfd_vma insn;
5894 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5895 insn &= 31 << 21;
5896 insn |= 0x3c020000; /* addis 0,2,0 */
5897 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5898 r_type = R_PPC_TPREL16_HA;
5899 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5900 }
5901 break;
5902
5903 case R_PPC_TLS:
5904 if (tls_mask != 0
5905 && (tls_mask & TLS_TPREL) == 0)
5906 {
5907 bfd_vma insn, rtra;
5908 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5909 if ((insn & ((31 << 26) | (31 << 11)))
5910 == ((31 << 26) | (2 << 11)))
5911 rtra = insn & ((1 << 26) - (1 << 16));
5912 else if ((insn & ((31 << 26) | (31 << 16)))
5913 == ((31 << 26) | (2 << 16)))
5914 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5915 else
5916 abort ();
5917 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5918 /* add -> addi. */
5919 insn = 14 << 26;
5920 else if ((insn & (31 << 1)) == 23 << 1
5921 && ((insn & (31 << 6)) < 14 << 6
5922 || ((insn & (31 << 6)) >= 16 << 6
5923 && (insn & (31 << 6)) < 24 << 6)))
5924 /* load and store indexed -> dform. */
5925 insn = (32 | ((insn >> 6) & 31)) << 26;
5926 else if ((insn & (31 << 1)) == 21 << 1
5927 && (insn & (0x1a << 6)) == 0)
5928 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5929 insn = (((58 | ((insn >> 6) & 4)) << 26)
5930 | ((insn >> 6) & 1));
5931 else if ((insn & (31 << 1)) == 21 << 1
5932 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5933 /* lwax -> lwa. */
5934 insn = (58 << 26) | 2;
5935 else
5936 abort ();
5937 insn |= rtra;
5938 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5939 r_type = R_PPC_TPREL16_LO;
5940 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5941
5942 /* Was PPC_TLS which sits on insn boundary, now
5943 PPC_TPREL16_LO which is at low-order half-word. */
5944 rel->r_offset += d_offset;
5945 }
5946 break;
5947
5948 case R_PPC_GOT_TLSGD16_HI:
5949 case R_PPC_GOT_TLSGD16_HA:
5950 tls_gd = TLS_TPRELGD;
5951 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5952 goto tls_gdld_hi;
5953 break;
5954
5955 case R_PPC_GOT_TLSLD16_HI:
5956 case R_PPC_GOT_TLSLD16_HA:
5957 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5958 {
5959 tls_gdld_hi:
5960 if ((tls_mask & tls_gd) != 0)
5961 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5962 + R_PPC_GOT_TPREL16);
5963 else
5964 {
5965 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5966 rel->r_offset -= d_offset;
5967 r_type = R_PPC_NONE;
5968 }
5969 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5970 }
5971 break;
5972
5973 case R_PPC_GOT_TLSGD16:
5974 case R_PPC_GOT_TLSGD16_LO:
5975 tls_gd = TLS_TPRELGD;
5976 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5977 goto tls_ldgd_opt;
5978 break;
5979
5980 case R_PPC_GOT_TLSLD16:
5981 case R_PPC_GOT_TLSLD16_LO:
5982 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5983 {
5984 bfd_vma insn1, insn2;
5985 bfd_vma offset;
5986
5987 tls_ldgd_opt:
5988 offset = rel[1].r_offset;
5989 insn1 = bfd_get_32 (output_bfd,
5990 contents + rel->r_offset - d_offset);
5991 if ((tls_mask & tls_gd) != 0)
5992 {
5993 /* IE */
5994 insn1 &= (1 << 26) - 1;
5995 insn1 |= 32 << 26; /* lwz */
5996 insn2 = 0x7c631214; /* add 3,3,2 */
5997 rel[1].r_info
5998 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
5999 rel[1].r_addend = 0;
6000 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6001 + R_PPC_GOT_TPREL16);
6002 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6003 }
6004 else
6005 {
6006 /* LE */
6007 insn1 = 0x3c620000; /* addis 3,2,0 */
6008 insn2 = 0x38630000; /* addi 3,3,0 */
6009 if (tls_gd == 0)
6010 {
6011 /* Was an LD reloc. */
6012 r_symndx = 0;
6013 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6014 }
6015 r_type = R_PPC_TPREL16_HA;
6016 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6017 rel[1].r_info = ELF32_R_INFO (r_symndx,
6018 R_PPC_TPREL16_LO);
6019 rel[1].r_offset += d_offset;
6020 rel[1].r_addend = rel->r_addend;
6021 }
6022 bfd_put_32 (output_bfd, insn1,
6023 contents + rel->r_offset - d_offset);
6024 bfd_put_32 (output_bfd, insn2, contents + offset);
6025 if (tls_gd == 0)
6026 {
6027 /* We changed the symbol on an LD reloc. Start over
6028 in order to get h, sym, sec etc. right. */
6029 rel--;
6030 continue;
6031 }
6032 }
6033 break;
6034 }
6035
6036 /* Handle other relocations that tweak non-addend part of insn. */
6037 branch_bit = 0;
6038 switch (r_type)
6039 {
6040 default:
6041 break;
6042
6043 /* Branch taken prediction relocations. */
6044 case R_PPC_ADDR14_BRTAKEN:
6045 case R_PPC_REL14_BRTAKEN:
6046 branch_bit = BRANCH_PREDICT_BIT;
6047 /* Fall thru */
6048
6049 /* Branch not taken prediction relocations. */
6050 case R_PPC_ADDR14_BRNTAKEN:
6051 case R_PPC_REL14_BRNTAKEN:
6052 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6053 insn &= ~BRANCH_PREDICT_BIT;
6054 insn |= branch_bit;
6055
6056 from = (rel->r_offset
6057 + input_section->output_offset
6058 + input_section->output_section->vma);
6059
6060 /* Invert 'y' bit if not the default. */
6061 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6062 insn ^= BRANCH_PREDICT_BIT;
6063
6064 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6065 break;
6066 }
6067
6068 addend = rel->r_addend;
6069 tls_type = 0;
6070 howto = NULL;
6071 if (r_type < R_PPC_max)
6072 howto = ppc_elf_howto_table[r_type];
6073 switch (r_type)
6074 {
6075 default:
6076 (*_bfd_error_handler)
6077 (_("%B: unknown relocation type %d for symbol %s"),
6078 input_bfd, (int) r_type, sym_name);
6079
6080 bfd_set_error (bfd_error_bad_value);
6081 ret = FALSE;
6082 continue;
6083
6084 case R_PPC_NONE:
6085 case R_PPC_TLS:
6086 case R_PPC_EMB_MRKREF:
6087 case R_PPC_GNU_VTINHERIT:
6088 case R_PPC_GNU_VTENTRY:
6089 continue;
6090
6091 /* GOT16 relocations. Like an ADDR16 using the symbol's
6092 address in the GOT as relocation value instead of the
6093 symbol's value itself. Also, create a GOT entry for the
6094 symbol and put the symbol value there. */
6095 case R_PPC_GOT_TLSGD16:
6096 case R_PPC_GOT_TLSGD16_LO:
6097 case R_PPC_GOT_TLSGD16_HI:
6098 case R_PPC_GOT_TLSGD16_HA:
6099 tls_type = TLS_TLS | TLS_GD;
6100 goto dogot;
6101
6102 case R_PPC_GOT_TLSLD16:
6103 case R_PPC_GOT_TLSLD16_LO:
6104 case R_PPC_GOT_TLSLD16_HI:
6105 case R_PPC_GOT_TLSLD16_HA:
6106 tls_type = TLS_TLS | TLS_LD;
6107 goto dogot;
6108
6109 case R_PPC_GOT_TPREL16:
6110 case R_PPC_GOT_TPREL16_LO:
6111 case R_PPC_GOT_TPREL16_HI:
6112 case R_PPC_GOT_TPREL16_HA:
6113 tls_type = TLS_TLS | TLS_TPREL;
6114 goto dogot;
6115
6116 case R_PPC_GOT_DTPREL16:
6117 case R_PPC_GOT_DTPREL16_LO:
6118 case R_PPC_GOT_DTPREL16_HI:
6119 case R_PPC_GOT_DTPREL16_HA:
6120 tls_type = TLS_TLS | TLS_DTPREL;
6121 goto dogot;
6122
6123 case R_PPC_GOT16:
6124 case R_PPC_GOT16_LO:
6125 case R_PPC_GOT16_HI:
6126 case R_PPC_GOT16_HA:
6127 dogot:
6128 {
6129 /* Relocation is to the entry for this symbol in the global
6130 offset table. */
6131 bfd_vma off;
6132 bfd_vma *offp;
6133 unsigned long indx;
6134
6135 if (htab->got == NULL)
6136 abort ();
6137
6138 indx = 0;
6139 if (tls_type == (TLS_TLS | TLS_LD)
6140 && (h == NULL
6141 || !h->def_dynamic))
6142 offp = &htab->tlsld_got.offset;
6143 else if (h != NULL)
6144 {
6145 bfd_boolean dyn;
6146 dyn = htab->elf.dynamic_sections_created;
6147 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6148 || (info->shared
6149 && SYMBOL_REFERENCES_LOCAL (info, h)))
6150 /* This is actually a static link, or it is a
6151 -Bsymbolic link and the symbol is defined
6152 locally, or the symbol was forced to be local
6153 because of a version file. */
6154 ;
6155 else
6156 {
6157 indx = h->dynindx;
6158 unresolved_reloc = FALSE;
6159 }
6160 offp = &h->got.offset;
6161 }
6162 else
6163 {
6164 if (local_got_offsets == NULL)
6165 abort ();
6166 offp = &local_got_offsets[r_symndx];
6167 }
6168
6169 /* The offset must always be a multiple of 4. We use the
6170 least significant bit to record whether we have already
6171 processed this entry. */
6172 off = *offp;
6173 if ((off & 1) != 0)
6174 off &= ~1;
6175 else
6176 {
6177 unsigned int tls_m = (tls_mask
6178 & (TLS_LD | TLS_GD | TLS_DTPREL
6179 | TLS_TPREL | TLS_TPRELGD));
6180
6181 if (offp == &htab->tlsld_got.offset)
6182 tls_m = TLS_LD;
6183 else if (h == NULL
6184 || !h->def_dynamic)
6185 tls_m &= ~TLS_LD;
6186
6187 /* We might have multiple got entries for this sym.
6188 Initialize them all. */
6189 do
6190 {
6191 int tls_ty = 0;
6192
6193 if ((tls_m & TLS_LD) != 0)
6194 {
6195 tls_ty = TLS_TLS | TLS_LD;
6196 tls_m &= ~TLS_LD;
6197 }
6198 else if ((tls_m & TLS_GD) != 0)
6199 {
6200 tls_ty = TLS_TLS | TLS_GD;
6201 tls_m &= ~TLS_GD;
6202 }
6203 else if ((tls_m & TLS_DTPREL) != 0)
6204 {
6205 tls_ty = TLS_TLS | TLS_DTPREL;
6206 tls_m &= ~TLS_DTPREL;
6207 }
6208 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6209 {
6210 tls_ty = TLS_TLS | TLS_TPREL;
6211 tls_m = 0;
6212 }
6213
6214 /* Generate relocs for the dynamic linker. */
6215 if ((info->shared || indx != 0)
6216 && (h == NULL
6217 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6218 || h->root.type != bfd_link_hash_undefweak))
6219 {
6220 outrel.r_offset = (htab->got->output_section->vma
6221 + htab->got->output_offset
6222 + off);
6223 outrel.r_addend = 0;
6224 if (tls_ty & (TLS_LD | TLS_GD))
6225 {
6226 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6227 if (tls_ty == (TLS_TLS | TLS_GD))
6228 {
6229 loc = htab->relgot->contents;
6230 loc += (htab->relgot->reloc_count++
6231 * sizeof (Elf32_External_Rela));
6232 bfd_elf32_swap_reloca_out (output_bfd,
6233 &outrel, loc);
6234 outrel.r_offset += 4;
6235 outrel.r_info
6236 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6237 }
6238 }
6239 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6240 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6241 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6242 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6243 else if (indx == 0)
6244 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6245 else
6246 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6247 if (indx == 0)
6248 {
6249 outrel.r_addend += relocation;
6250 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6251 outrel.r_addend -= htab->elf.tls_sec->vma;
6252 }
6253 loc = htab->relgot->contents;
6254 loc += (htab->relgot->reloc_count++
6255 * sizeof (Elf32_External_Rela));
6256 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6257 }
6258
6259 /* Init the .got section contents if we're not
6260 emitting a reloc. */
6261 else
6262 {
6263 bfd_vma value = relocation;
6264
6265 if (tls_ty == (TLS_TLS | TLS_LD))
6266 value = 1;
6267 else if (tls_ty != 0)
6268 {
6269 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6270 if (tls_ty == (TLS_TLS | TLS_TPREL))
6271 value += DTP_OFFSET - TP_OFFSET;
6272
6273 if (tls_ty == (TLS_TLS | TLS_GD))
6274 {
6275 bfd_put_32 (output_bfd, value,
6276 htab->got->contents + off + 4);
6277 value = 1;
6278 }
6279 }
6280 bfd_put_32 (output_bfd, value,
6281 htab->got->contents + off);
6282 }
6283
6284 off += 4;
6285 if (tls_ty & (TLS_LD | TLS_GD))
6286 off += 4;
6287 }
6288 while (tls_m != 0);
6289
6290 off = *offp;
6291 *offp = off | 1;
6292 }
6293
6294 if (off >= (bfd_vma) -2)
6295 abort ();
6296
6297 if ((tls_type & TLS_TLS) != 0)
6298 {
6299 if (tls_type != (TLS_TLS | TLS_LD))
6300 {
6301 if ((tls_mask & TLS_LD) != 0
6302 && !(h == NULL
6303 || !h->def_dynamic))
6304 off += 8;
6305 if (tls_type != (TLS_TLS | TLS_GD))
6306 {
6307 if ((tls_mask & TLS_GD) != 0)
6308 off += 8;
6309 if (tls_type != (TLS_TLS | TLS_DTPREL))
6310 {
6311 if ((tls_mask & TLS_DTPREL) != 0)
6312 off += 4;
6313 }
6314 }
6315 }
6316 }
6317
6318 relocation = htab->got->output_offset + off;
6319 relocation -= htab->elf.hgot->root.u.def.value;
6320
6321 /* Addends on got relocations don't make much sense.
6322 x+off@got is actually x@got+off, and since the got is
6323 generated by a hash table traversal, the value in the
6324 got at entry m+n bears little relation to the entry m. */
6325 if (addend != 0)
6326 (*_bfd_error_handler)
6327 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6328 input_bfd,
6329 input_section,
6330 (long) rel->r_offset,
6331 howto->name,
6332 sym_name);
6333 }
6334 break;
6335
6336 /* Relocations that need no special processing. */
6337 case R_PPC_LOCAL24PC:
6338 /* It makes no sense to point a local relocation
6339 at a symbol not in this object. */
6340 if (unresolved_reloc)
6341 {
6342 if (! (*info->callbacks->undefined_symbol) (info,
6343 h->root.root.string,
6344 input_bfd,
6345 input_section,
6346 rel->r_offset,
6347 TRUE))
6348 return FALSE;
6349 continue;
6350 }
6351 break;
6352
6353 case R_PPC_DTPREL16:
6354 case R_PPC_DTPREL16_LO:
6355 case R_PPC_DTPREL16_HI:
6356 case R_PPC_DTPREL16_HA:
6357 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6358 break;
6359
6360 /* Relocations that may need to be propagated if this is a shared
6361 object. */
6362 case R_PPC_TPREL16:
6363 case R_PPC_TPREL16_LO:
6364 case R_PPC_TPREL16_HI:
6365 case R_PPC_TPREL16_HA:
6366 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6367 /* The TPREL16 relocs shouldn't really be used in shared
6368 libs as they will result in DT_TEXTREL being set, but
6369 support them anyway. */
6370 goto dodyn;
6371
6372 case R_PPC_TPREL32:
6373 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6374 goto dodyn;
6375
6376 case R_PPC_DTPREL32:
6377 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6378 goto dodyn;
6379
6380 case R_PPC_DTPMOD32:
6381 relocation = 1;
6382 addend = 0;
6383 goto dodyn;
6384
6385 case R_PPC_REL16:
6386 case R_PPC_REL16_LO:
6387 case R_PPC_REL16_HI:
6388 case R_PPC_REL16_HA:
6389 break;
6390
6391 case R_PPC_REL24:
6392 case R_PPC_REL32:
6393 case R_PPC_REL14:
6394 case R_PPC_REL14_BRTAKEN:
6395 case R_PPC_REL14_BRNTAKEN:
6396 /* If these relocations are not to a named symbol, they can be
6397 handled right here, no need to bother the dynamic linker. */
6398 if (SYMBOL_REFERENCES_LOCAL (info, h)
6399 || h == htab->elf.hgot)
6400 break;
6401 /* fall through */
6402
6403 /* Relocations that always need to be propagated if this is a shared
6404 object. */
6405 case R_PPC_ADDR32:
6406 case R_PPC_ADDR24:
6407 case R_PPC_ADDR16:
6408 case R_PPC_ADDR16_LO:
6409 case R_PPC_ADDR16_HI:
6410 case R_PPC_ADDR16_HA:
6411 case R_PPC_ADDR14:
6412 case R_PPC_ADDR14_BRTAKEN:
6413 case R_PPC_ADDR14_BRNTAKEN:
6414 case R_PPC_UADDR32:
6415 case R_PPC_UADDR16:
6416 dodyn:
6417 if ((input_section->flags & SEC_ALLOC) == 0)
6418 break;
6419 /* Fall thru. */
6420
6421 if ((info->shared
6422 && (h == NULL
6423 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6424 || h->root.type != bfd_link_hash_undefweak)
6425 && (MUST_BE_DYN_RELOC (r_type)
6426 || !SYMBOL_CALLS_LOCAL (info, h)))
6427 || (ELIMINATE_COPY_RELOCS
6428 && !info->shared
6429 && h != NULL
6430 && h->dynindx != -1
6431 && !h->non_got_ref
6432 && h->def_dynamic
6433 && !h->def_regular))
6434 {
6435 int skip;
6436
6437 #ifdef DEBUG
6438 fprintf (stderr, "ppc_elf_relocate_section needs to "
6439 "create relocation for %s\n",
6440 (h && h->root.root.string
6441 ? h->root.root.string : "<unknown>"));
6442 #endif
6443
6444 /* When generating a shared object, these relocations
6445 are copied into the output file to be resolved at run
6446 time. */
6447 if (sreloc == NULL)
6448 {
6449 const char *name;
6450
6451 name = (bfd_elf_string_from_elf_section
6452 (input_bfd,
6453 elf_elfheader (input_bfd)->e_shstrndx,
6454 elf_section_data (input_section)->rel_hdr.sh_name));
6455 if (name == NULL)
6456 return FALSE;
6457
6458 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6459 && strcmp (bfd_get_section_name (input_bfd,
6460 input_section),
6461 name + 5) == 0);
6462
6463 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6464 BFD_ASSERT (sreloc != NULL);
6465 }
6466
6467 skip = 0;
6468
6469 outrel.r_offset =
6470 _bfd_elf_section_offset (output_bfd, info, input_section,
6471 rel->r_offset);
6472 if (outrel.r_offset == (bfd_vma) -1
6473 || outrel.r_offset == (bfd_vma) -2)
6474 skip = (int) outrel.r_offset;
6475 outrel.r_offset += (input_section->output_section->vma
6476 + input_section->output_offset);
6477
6478 if (skip)
6479 memset (&outrel, 0, sizeof outrel);
6480 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6481 {
6482 unresolved_reloc = FALSE;
6483 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6484 outrel.r_addend = rel->r_addend;
6485 }
6486 else
6487 {
6488 outrel.r_addend = relocation + rel->r_addend;
6489
6490 if (r_type == R_PPC_ADDR32)
6491 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6492 else
6493 {
6494 long indx;
6495
6496 if (bfd_is_abs_section (sec))
6497 indx = 0;
6498 else if (sec == NULL || sec->owner == NULL)
6499 {
6500 bfd_set_error (bfd_error_bad_value);
6501 return FALSE;
6502 }
6503 else
6504 {
6505 asection *osec;
6506
6507 /* We are turning this relocation into one
6508 against a section symbol. It would be
6509 proper to subtract the symbol's value,
6510 osec->vma, from the emitted reloc addend,
6511 but ld.so expects buggy relocs. */
6512 osec = sec->output_section;
6513 indx = elf_section_data (osec)->dynindx;
6514 if (indx == 0)
6515 {
6516 osec = htab->elf.text_index_section;
6517 indx = elf_section_data (osec)->dynindx;
6518 }
6519 BFD_ASSERT (indx != 0);
6520 #ifdef DEBUG
6521 if (indx == 0)
6522 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6523 indx, osec->name, osec->flags,
6524 h->root.root.string);
6525 #endif
6526 }
6527
6528 outrel.r_info = ELF32_R_INFO (indx, r_type);
6529 }
6530 }
6531
6532 loc = sreloc->contents;
6533 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6534 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6535
6536 if (skip == -1)
6537 continue;
6538
6539 /* This reloc will be computed at runtime. We clear the memory
6540 so that it contains predictable value. */
6541 if (! skip
6542 && ((input_section->flags & SEC_ALLOC) != 0
6543 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6544 {
6545 relocation = howto->pc_relative ? outrel.r_offset : 0;
6546 addend = 0;
6547 break;
6548 }
6549 }
6550 break;
6551
6552 case R_PPC_RELAX32PC_PLT:
6553 case R_PPC_RELAX32_PLT:
6554 {
6555 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6556
6557 if (htab->plt_type == PLT_NEW)
6558 relocation = (htab->glink->output_section->vma
6559 + htab->glink->output_offset
6560 + ent->glink_offset);
6561 else
6562 relocation = (htab->plt->output_section->vma
6563 + htab->plt->output_offset
6564 + ent->plt.offset);
6565 addend = 0;
6566 }
6567 if (r_type == R_PPC_RELAX32_PLT)
6568 goto relax32;
6569 /* Fall thru */
6570
6571 case R_PPC_RELAX32PC:
6572 relocation -= (input_section->output_section->vma
6573 + input_section->output_offset
6574 + rel->r_offset - 4);
6575 /* Fall thru */
6576
6577 case R_PPC_RELAX32:
6578 relax32:
6579 {
6580 unsigned long t0;
6581 unsigned long t1;
6582
6583 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6584 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6585
6586 /* We're clearing the bits for R_PPC_ADDR16_HA
6587 and R_PPC_ADDR16_LO here. */
6588 t0 &= ~0xffff;
6589 t1 &= ~0xffff;
6590
6591 /* t0 is HA, t1 is LO */
6592 relocation += addend;
6593 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6594 t1 |= relocation & 0xffff;
6595
6596 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6597 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6598 }
6599 continue;
6600
6601 /* Indirect .sdata relocation. */
6602 case R_PPC_EMB_SDAI16:
6603 BFD_ASSERT (htab->sdata[0].section != NULL);
6604 relocation
6605 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6606 h, relocation, rel);
6607 break;
6608
6609 /* Indirect .sdata2 relocation. */
6610 case R_PPC_EMB_SDA2I16:
6611 BFD_ASSERT (htab->sdata[1].section != NULL);
6612 relocation
6613 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6614 h, relocation, rel);
6615 break;
6616
6617 /* Handle the TOC16 reloc. We want to use the offset within the .got
6618 section, not the actual VMA. This is appropriate when generating
6619 an embedded ELF object, for which the .got section acts like the
6620 AIX .toc section. */
6621 case R_PPC_TOC16: /* phony GOT16 relocations */
6622 BFD_ASSERT (sec != NULL);
6623 BFD_ASSERT (bfd_is_und_section (sec)
6624 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6625 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6626
6627 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6628 break;
6629
6630 case R_PPC_PLTREL24:
6631 /* Relocation is to the entry for this symbol in the
6632 procedure linkage table. */
6633 {
6634 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6635
6636 addend = 0;
6637 if (ent == NULL
6638 || htab->plt == NULL)
6639 {
6640 /* We didn't make a PLT entry for this symbol. This
6641 happens when statically linking PIC code, or when
6642 using -Bsymbolic. */
6643 break;
6644 }
6645
6646 unresolved_reloc = FALSE;
6647 if (htab->plt_type == PLT_NEW)
6648 relocation = (htab->glink->output_section->vma
6649 + htab->glink->output_offset
6650 + ent->glink_offset);
6651 else
6652 relocation = (htab->plt->output_section->vma
6653 + htab->plt->output_offset
6654 + ent->plt.offset);
6655 }
6656 break;
6657
6658 /* Relocate against _SDA_BASE_. */
6659 case R_PPC_SDAREL16:
6660 {
6661 const char *name;
6662 struct elf_link_hash_entry *sh;
6663
6664 BFD_ASSERT (sec != NULL);
6665 name = bfd_get_section_name (abfd, sec->output_section);
6666 if (! ((CONST_STRNEQ (name, ".sdata")
6667 && (name[6] == 0 || name[6] == '.'))
6668 || (CONST_STRNEQ (name, ".sbss")
6669 && (name[5] == 0 || name[5] == '.'))))
6670 {
6671 (*_bfd_error_handler)
6672 (_("%B: the target (%s) of a %s relocation is "
6673 "in the wrong output section (%s)"),
6674 input_bfd,
6675 sym_name,
6676 howto->name,
6677 name);
6678 }
6679 sh = htab->sdata[0].sym;
6680 addend -= (sh->root.u.def.value
6681 + sh->root.u.def.section->output_offset
6682 + sh->root.u.def.section->output_section->vma);
6683 }
6684 break;
6685
6686 /* Relocate against _SDA2_BASE_. */
6687 case R_PPC_EMB_SDA2REL:
6688 {
6689 const char *name;
6690 struct elf_link_hash_entry *sh;
6691
6692 BFD_ASSERT (sec != NULL);
6693 name = bfd_get_section_name (abfd, sec->output_section);
6694 if (! (CONST_STRNEQ (name, ".sdata2")
6695 || CONST_STRNEQ (name, ".sbss2")))
6696 {
6697 (*_bfd_error_handler)
6698 (_("%B: the target (%s) of a %s relocation is "
6699 "in the wrong output section (%s)"),
6700 input_bfd,
6701 sym_name,
6702 howto->name,
6703 name);
6704
6705 bfd_set_error (bfd_error_bad_value);
6706 ret = FALSE;
6707 continue;
6708 }
6709 sh = htab->sdata[1].sym;
6710 addend -= (sh->root.u.def.value
6711 + sh->root.u.def.section->output_offset
6712 + sh->root.u.def.section->output_section->vma);
6713 }
6714 break;
6715
6716 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6717 case R_PPC_EMB_SDA21:
6718 case R_PPC_EMB_RELSDA:
6719 {
6720 const char *name;
6721 int reg;
6722 struct elf_link_hash_entry *sh;
6723
6724 BFD_ASSERT (sec != NULL);
6725 name = bfd_get_section_name (abfd, sec->output_section);
6726 if (((CONST_STRNEQ (name, ".sdata")
6727 && (name[6] == 0 || name[6] == '.'))
6728 || (CONST_STRNEQ (name, ".sbss")
6729 && (name[5] == 0 || name[5] == '.'))))
6730 {
6731 reg = 13;
6732 sh = htab->sdata[0].sym;
6733 addend -= (sh->root.u.def.value
6734 + sh->root.u.def.section->output_offset
6735 + sh->root.u.def.section->output_section->vma);
6736 }
6737
6738 else if (CONST_STRNEQ (name, ".sdata2")
6739 || CONST_STRNEQ (name, ".sbss2"))
6740 {
6741 reg = 2;
6742 sh = htab->sdata[1].sym;
6743 addend -= (sh->root.u.def.value
6744 + sh->root.u.def.section->output_offset
6745 + sh->root.u.def.section->output_section->vma);
6746 }
6747
6748 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6749 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6750 {
6751 reg = 0;
6752 }
6753
6754 else
6755 {
6756 (*_bfd_error_handler)
6757 (_("%B: the target (%s) of a %s relocation is "
6758 "in the wrong output section (%s)"),
6759 input_bfd,
6760 sym_name,
6761 howto->name,
6762 name);
6763
6764 bfd_set_error (bfd_error_bad_value);
6765 ret = FALSE;
6766 continue;
6767 }
6768
6769 if (r_type == R_PPC_EMB_SDA21)
6770 { /* fill in register field */
6771 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6772 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6773 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6774 }
6775 }
6776 break;
6777
6778 /* Relocate against the beginning of the section. */
6779 case R_PPC_SECTOFF:
6780 case R_PPC_SECTOFF_LO:
6781 case R_PPC_SECTOFF_HI:
6782 case R_PPC_SECTOFF_HA:
6783 BFD_ASSERT (sec != NULL);
6784 addend -= sec->output_section->vma;
6785 break;
6786
6787 /* Negative relocations. */
6788 case R_PPC_EMB_NADDR32:
6789 case R_PPC_EMB_NADDR16:
6790 case R_PPC_EMB_NADDR16_LO:
6791 case R_PPC_EMB_NADDR16_HI:
6792 case R_PPC_EMB_NADDR16_HA:
6793 addend -= 2 * relocation;
6794 break;
6795
6796 case R_PPC_COPY:
6797 case R_PPC_GLOB_DAT:
6798 case R_PPC_JMP_SLOT:
6799 case R_PPC_RELATIVE:
6800 case R_PPC_PLT32:
6801 case R_PPC_PLTREL32:
6802 case R_PPC_PLT16_LO:
6803 case R_PPC_PLT16_HI:
6804 case R_PPC_PLT16_HA:
6805 case R_PPC_ADDR30:
6806 case R_PPC_EMB_RELSEC16:
6807 case R_PPC_EMB_RELST_LO:
6808 case R_PPC_EMB_RELST_HI:
6809 case R_PPC_EMB_RELST_HA:
6810 case R_PPC_EMB_BIT_FLD:
6811 (*_bfd_error_handler)
6812 (_("%B: relocation %s is not yet supported for symbol %s."),
6813 input_bfd,
6814 howto->name,
6815 sym_name);
6816
6817 bfd_set_error (bfd_error_invalid_operation);
6818 ret = FALSE;
6819 continue;
6820 }
6821
6822 /* Do any further special processing. */
6823 switch (r_type)
6824 {
6825 default:
6826 break;
6827
6828 case R_PPC_ADDR16_HA:
6829 case R_PPC_REL16_HA:
6830 case R_PPC_SECTOFF_HA:
6831 case R_PPC_TPREL16_HA:
6832 case R_PPC_DTPREL16_HA:
6833 case R_PPC_EMB_NADDR16_HA:
6834 case R_PPC_EMB_RELST_HA:
6835 /* It's just possible that this symbol is a weak symbol
6836 that's not actually defined anywhere. In that case,
6837 'sec' would be NULL, and we should leave the symbol
6838 alone (it will be set to zero elsewhere in the link). */
6839 if (sec == NULL)
6840 break;
6841 /* Fall thru */
6842
6843 case R_PPC_PLT16_HA:
6844 case R_PPC_GOT16_HA:
6845 case R_PPC_GOT_TLSGD16_HA:
6846 case R_PPC_GOT_TLSLD16_HA:
6847 case R_PPC_GOT_TPREL16_HA:
6848 case R_PPC_GOT_DTPREL16_HA:
6849 /* Add 0x10000 if sign bit in 0:15 is set.
6850 Bits 0:15 are not used. */
6851 addend += 0x8000;
6852 break;
6853 }
6854
6855 #ifdef DEBUG
6856 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6857 "offset = %ld, addend = %ld\n",
6858 howto->name,
6859 (int) r_type,
6860 sym_name,
6861 r_symndx,
6862 (long) rel->r_offset,
6863 (long) addend);
6864 #endif
6865
6866 if (unresolved_reloc
6867 && !((input_section->flags & SEC_DEBUGGING) != 0
6868 && h->def_dynamic))
6869 {
6870 (*_bfd_error_handler)
6871 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6872 input_bfd,
6873 input_section,
6874 (long) rel->r_offset,
6875 howto->name,
6876 sym_name);
6877 ret = FALSE;
6878 }
6879
6880 r = _bfd_final_link_relocate (howto,
6881 input_bfd,
6882 input_section,
6883 contents,
6884 rel->r_offset,
6885 relocation,
6886 addend);
6887
6888 if (r != bfd_reloc_ok)
6889 {
6890 if (r == bfd_reloc_overflow)
6891 {
6892 if (warned)
6893 continue;
6894 if (h != NULL
6895 && h->root.type == bfd_link_hash_undefweak
6896 && howto->pc_relative)
6897 {
6898 /* Assume this is a call protected by other code that
6899 detect the symbol is undefined. If this is the case,
6900 we can safely ignore the overflow. If not, the
6901 program is hosed anyway, and a little warning isn't
6902 going to help. */
6903
6904 continue;
6905 }
6906
6907 if (! (*info->callbacks->reloc_overflow) (info,
6908 (h ? &h->root : NULL),
6909 sym_name,
6910 howto->name,
6911 rel->r_addend,
6912 input_bfd,
6913 input_section,
6914 rel->r_offset))
6915 return FALSE;
6916 }
6917 else
6918 {
6919 (*_bfd_error_handler)
6920 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6921 input_bfd, input_section,
6922 (long) rel->r_offset, howto->name, sym_name, (int) r);
6923 ret = FALSE;
6924 }
6925 }
6926 }
6927
6928 #ifdef DEBUG
6929 fprintf (stderr, "\n");
6930 #endif
6931
6932 return ret;
6933 }
6934 \f
6935 #define PPC_LO(v) ((v) & 0xffff)
6936 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6937 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6938
6939 /* Finish up dynamic symbol handling. We set the contents of various
6940 dynamic sections here. */
6941
6942 static bfd_boolean
6943 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6944 struct bfd_link_info *info,
6945 struct elf_link_hash_entry *h,
6946 Elf_Internal_Sym *sym)
6947 {
6948 struct ppc_elf_link_hash_table *htab;
6949 struct plt_entry *ent;
6950 bfd_boolean doneone;
6951
6952 #ifdef DEBUG
6953 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6954 h->root.root.string);
6955 #endif
6956
6957 htab = ppc_elf_hash_table (info);
6958 BFD_ASSERT (htab->elf.dynobj != NULL);
6959
6960 doneone = FALSE;
6961 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6962 if (ent->plt.offset != (bfd_vma) -1)
6963 {
6964 if (!doneone)
6965 {
6966 Elf_Internal_Rela rela;
6967 bfd_byte *loc;
6968 bfd_vma reloc_index;
6969
6970 if (htab->plt_type == PLT_NEW)
6971 reloc_index = ent->plt.offset / 4;
6972 else
6973 {
6974 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6975 / htab->plt_slot_size);
6976 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6977 && htab->plt_type == PLT_OLD)
6978 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6979 }
6980
6981 /* This symbol has an entry in the procedure linkage table.
6982 Set it up. */
6983 if (htab->plt_type == PLT_VXWORKS)
6984 {
6985 bfd_vma got_offset;
6986 const bfd_vma *plt_entry;
6987
6988 /* The first three entries in .got.plt are reserved. */
6989 got_offset = (reloc_index + 3) * 4;
6990
6991 /* Use the right PLT. */
6992 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6993 : ppc_elf_vxworks_plt_entry;
6994
6995 /* Fill in the .plt on VxWorks. */
6996 if (info->shared)
6997 {
6998 bfd_vma got_offset_hi = (got_offset >> 16)
6999 + ((got_offset & 0x8000) >> 15);
7000
7001 bfd_put_32 (output_bfd,
7002 plt_entry[0] | (got_offset_hi & 0xffff),
7003 htab->plt->contents + ent->plt.offset + 0);
7004 bfd_put_32 (output_bfd,
7005 plt_entry[1] | (got_offset & 0xffff),
7006 htab->plt->contents + ent->plt.offset + 4);
7007 }
7008 else
7009 {
7010 bfd_vma got_loc
7011 = (got_offset
7012 + htab->elf.hgot->root.u.def.value
7013 + htab->elf.hgot->root.u.def.section->output_offset
7014 + htab->elf.hgot->root.u.def.section->output_section->vma);
7015 bfd_vma got_loc_hi = (got_loc >> 16)
7016 + ((got_loc & 0x8000) >> 15);
7017
7018 bfd_put_32 (output_bfd,
7019 plt_entry[0] | (got_loc_hi & 0xffff),
7020 htab->plt->contents + ent->plt.offset + 0);
7021 bfd_put_32 (output_bfd,
7022 plt_entry[1] | (got_loc & 0xffff),
7023 htab->plt->contents + ent->plt.offset + 4);
7024 }
7025
7026 bfd_put_32 (output_bfd, plt_entry[2],
7027 htab->plt->contents + ent->plt.offset + 8);
7028 bfd_put_32 (output_bfd, plt_entry[3],
7029 htab->plt->contents + ent->plt.offset + 12);
7030
7031 /* This instruction is an immediate load. The value loaded is
7032 the byte offset of the R_PPC_JMP_SLOT relocation from the
7033 start of the .rela.plt section. The value is stored in the
7034 low-order 16 bits of the load instruction. */
7035 /* NOTE: It appears that this is now an index rather than a
7036 prescaled offset. */
7037 bfd_put_32 (output_bfd,
7038 plt_entry[4] | reloc_index,
7039 htab->plt->contents + ent->plt.offset + 16);
7040 /* This instruction is a PC-relative branch whose target is
7041 the start of the PLT section. The address of this branch
7042 instruction is 20 bytes beyond the start of this PLT entry.
7043 The address is encoded in bits 6-29, inclusive. The value
7044 stored is right-shifted by two bits, permitting a 26-bit
7045 offset. */
7046 bfd_put_32 (output_bfd,
7047 (plt_entry[5]
7048 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7049 htab->plt->contents + ent->plt.offset + 20);
7050 bfd_put_32 (output_bfd, plt_entry[6],
7051 htab->plt->contents + ent->plt.offset + 24);
7052 bfd_put_32 (output_bfd, plt_entry[7],
7053 htab->plt->contents + ent->plt.offset + 28);
7054
7055 /* Fill in the GOT entry corresponding to this PLT slot with
7056 the address immediately after the the "bctr" instruction
7057 in this PLT entry. */
7058 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7059 + htab->plt->output_offset
7060 + ent->plt.offset + 16),
7061 htab->sgotplt->contents + got_offset);
7062
7063 if (!info->shared)
7064 {
7065 /* Fill in a couple of entries in .rela.plt.unloaded. */
7066 loc = htab->srelplt2->contents
7067 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7068 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7069 * sizeof (Elf32_External_Rela));
7070
7071 /* Provide the @ha relocation for the first instruction. */
7072 rela.r_offset = (htab->plt->output_section->vma
7073 + htab->plt->output_offset
7074 + ent->plt.offset + 2);
7075 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7076 R_PPC_ADDR16_HA);
7077 rela.r_addend = got_offset;
7078 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7079 loc += sizeof (Elf32_External_Rela);
7080
7081 /* Provide the @l relocation for the second instruction. */
7082 rela.r_offset = (htab->plt->output_section->vma
7083 + htab->plt->output_offset
7084 + ent->plt.offset + 6);
7085 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7086 R_PPC_ADDR16_LO);
7087 rela.r_addend = got_offset;
7088 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7089 loc += sizeof (Elf32_External_Rela);
7090
7091 /* Provide a relocation for the GOT entry corresponding to this
7092 PLT slot. Point it at the middle of the .plt entry. */
7093 rela.r_offset = (htab->sgotplt->output_section->vma
7094 + htab->sgotplt->output_offset
7095 + got_offset);
7096 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7097 R_PPC_ADDR32);
7098 rela.r_addend = ent->plt.offset + 16;
7099 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7100 }
7101
7102 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7103 In particular, the offset for the relocation is not the
7104 address of the PLT entry for this function, as specified
7105 by the ABI. Instead, the offset is set to the address of
7106 the GOT slot for this function. See EABI 4.4.4.1. */
7107 rela.r_offset = (htab->sgotplt->output_section->vma
7108 + htab->sgotplt->output_offset
7109 + got_offset);
7110
7111 }
7112 else
7113 {
7114 rela.r_offset = (htab->plt->output_section->vma
7115 + htab->plt->output_offset
7116 + ent->plt.offset);
7117 if (htab->plt_type == PLT_OLD)
7118 {
7119 /* We don't need to fill in the .plt. The ppc dynamic
7120 linker will fill it in. */
7121 }
7122 else
7123 {
7124 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7125 + htab->glink->output_section->vma
7126 + htab->glink->output_offset);
7127 bfd_put_32 (output_bfd, val,
7128 htab->plt->contents + ent->plt.offset);
7129 }
7130 }
7131
7132 /* Fill in the entry in the .rela.plt section. */
7133 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7134 rela.r_addend = 0;
7135
7136 loc = (htab->relplt->contents
7137 + reloc_index * sizeof (Elf32_External_Rela));
7138 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7139
7140 if (!h->def_regular)
7141 {
7142 /* Mark the symbol as undefined, rather than as defined in
7143 the .plt section. Leave the value alone. */
7144 sym->st_shndx = SHN_UNDEF;
7145 /* If the symbol is weak, we do need to clear the value.
7146 Otherwise, the PLT entry would provide a definition for
7147 the symbol even if the symbol wasn't defined anywhere,
7148 and so the symbol would never be NULL. */
7149 if (!h->ref_regular_nonweak)
7150 sym->st_value = 0;
7151 }
7152 doneone = TRUE;
7153 }
7154
7155 if (htab->plt_type == PLT_NEW)
7156 {
7157 bfd_vma plt;
7158 unsigned char *p;
7159
7160 plt = (ent->plt.offset
7161 + htab->plt->output_section->vma
7162 + htab->plt->output_offset);
7163 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7164
7165 if (info->shared || info->pie)
7166 {
7167 bfd_vma got = 0;
7168
7169 if (ent->addend >= 32768)
7170 got = (ent->addend
7171 + ent->sec->output_section->vma
7172 + ent->sec->output_offset);
7173 else if (htab->elf.hgot != NULL)
7174 got = (htab->elf.hgot->root.u.def.value
7175 + htab->elf.hgot->root.u.def.section->output_section->vma
7176 + htab->elf.hgot->root.u.def.section->output_offset);
7177
7178 plt -= got;
7179
7180 if (plt + 0x8000 < 0x10000)
7181 {
7182 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7183 p += 4;
7184 bfd_put_32 (output_bfd, MTCTR_11, p);
7185 p += 4;
7186 bfd_put_32 (output_bfd, BCTR, p);
7187 p += 4;
7188 bfd_put_32 (output_bfd, NOP, p);
7189 p += 4;
7190 }
7191 else
7192 {
7193 bfd_put_32 (output_bfd, ADDIS_11_30 + 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 }
7203 else
7204 {
7205 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7206 p += 4;
7207 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7208 p += 4;
7209 bfd_put_32 (output_bfd, MTCTR_11, p);
7210 p += 4;
7211 bfd_put_32 (output_bfd, BCTR, p);
7212 p += 4;
7213
7214 /* We only need one non-PIC glink stub. */
7215 break;
7216 }
7217 }
7218 else
7219 break;
7220 }
7221
7222 if (h->needs_copy)
7223 {
7224 asection *s;
7225 Elf_Internal_Rela rela;
7226 bfd_byte *loc;
7227
7228 /* This symbols needs a copy reloc. Set it up. */
7229
7230 #ifdef DEBUG
7231 fprintf (stderr, ", copy");
7232 #endif
7233
7234 BFD_ASSERT (h->dynindx != -1);
7235
7236 if (ppc_elf_hash_entry (h)->has_sda_refs)
7237 s = htab->relsbss;
7238 else
7239 s = htab->relbss;
7240 BFD_ASSERT (s != NULL);
7241
7242 rela.r_offset = (h->root.u.def.value
7243 + h->root.u.def.section->output_section->vma
7244 + h->root.u.def.section->output_offset);
7245 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7246 rela.r_addend = 0;
7247 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7248 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7249 }
7250
7251 #ifdef DEBUG
7252 fprintf (stderr, "\n");
7253 #endif
7254
7255 /* Mark some specially defined symbols as absolute. */
7256 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7257 || (!htab->is_vxworks
7258 && (h == htab->elf.hgot
7259 || strcmp (h->root.root.string,
7260 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7261 sym->st_shndx = SHN_ABS;
7262
7263 return TRUE;
7264 }
7265 \f
7266 static enum elf_reloc_type_class
7267 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7268 {
7269 switch (ELF32_R_TYPE (rela->r_info))
7270 {
7271 case R_PPC_RELATIVE:
7272 return reloc_class_relative;
7273 case R_PPC_REL24:
7274 case R_PPC_ADDR24:
7275 case R_PPC_JMP_SLOT:
7276 return reloc_class_plt;
7277 case R_PPC_COPY:
7278 return reloc_class_copy;
7279 default:
7280 return reloc_class_normal;
7281 }
7282 }
7283 \f
7284 /* Finish up the dynamic sections. */
7285
7286 static bfd_boolean
7287 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7288 struct bfd_link_info *info)
7289 {
7290 asection *sdyn;
7291 asection *splt;
7292 struct ppc_elf_link_hash_table *htab;
7293 bfd_vma got;
7294 bfd * dynobj;
7295
7296 #ifdef DEBUG
7297 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7298 #endif
7299
7300 htab = ppc_elf_hash_table (info);
7301 dynobj = elf_hash_table (info)->dynobj;
7302 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7303 if (htab->is_vxworks)
7304 splt = bfd_get_section_by_name (dynobj, ".plt");
7305 else
7306 splt = NULL;
7307
7308 got = 0;
7309 if (htab->elf.hgot != NULL)
7310 got = (htab->elf.hgot->root.u.def.value
7311 + htab->elf.hgot->root.u.def.section->output_section->vma
7312 + htab->elf.hgot->root.u.def.section->output_offset);
7313
7314 if (htab->elf.dynamic_sections_created)
7315 {
7316 Elf32_External_Dyn *dyncon, *dynconend;
7317
7318 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7319
7320 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7321 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7322 for (; dyncon < dynconend; dyncon++)
7323 {
7324 Elf_Internal_Dyn dyn;
7325 asection *s;
7326
7327 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7328
7329 switch (dyn.d_tag)
7330 {
7331 case DT_PLTGOT:
7332 if (htab->is_vxworks)
7333 s = htab->sgotplt;
7334 else
7335 s = htab->plt;
7336 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7337 break;
7338
7339 case DT_PLTRELSZ:
7340 dyn.d_un.d_val = htab->relplt->size;
7341 break;
7342
7343 case DT_JMPREL:
7344 s = htab->relplt;
7345 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7346 break;
7347
7348 case DT_PPC_GOT:
7349 dyn.d_un.d_ptr = got;
7350 break;
7351
7352 case DT_RELASZ:
7353 if (htab->is_vxworks)
7354 {
7355 if (htab->relplt)
7356 dyn.d_un.d_ptr -= htab->relplt->size;
7357 break;
7358 }
7359 continue;
7360
7361 default:
7362 if (htab->is_vxworks
7363 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7364 break;
7365 continue;
7366 }
7367
7368 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7369 }
7370 }
7371
7372 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7373 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7374 if (htab->got != NULL)
7375 {
7376 unsigned char *p = htab->got->contents;
7377 bfd_vma val;
7378
7379 p += htab->elf.hgot->root.u.def.value;
7380 if (htab->plt_type == PLT_OLD)
7381 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7382
7383 val = 0;
7384 if (sdyn != NULL)
7385 val = sdyn->output_section->vma + sdyn->output_offset;
7386 bfd_put_32 (output_bfd, val, p);
7387
7388 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7389 }
7390
7391 /* Fill in the first entry in the VxWorks procedure linkage table. */
7392 if (splt && splt->size > 0)
7393 {
7394 /* Use the right PLT. */
7395 static const bfd_vma *plt_entry = NULL;
7396 plt_entry = info->shared ?
7397 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7398
7399 if (!info->shared)
7400 {
7401 bfd_vma got_value =
7402 (htab->elf.hgot->root.u.def.section->output_section->vma
7403 + htab->elf.hgot->root.u.def.section->output_offset
7404 + htab->elf.hgot->root.u.def.value);
7405 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7406
7407 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7408 splt->contents + 0);
7409 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7410 splt->contents + 4);
7411 }
7412 else
7413 {
7414 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7415 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7416 }
7417 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7418 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7419 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7420 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7421 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7422 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7423
7424 if (! info->shared)
7425 {
7426 Elf_Internal_Rela rela;
7427 bfd_byte *loc;
7428
7429 loc = htab->srelplt2->contents;
7430
7431 /* Output the @ha relocation for the first instruction. */
7432 rela.r_offset = (htab->plt->output_section->vma
7433 + htab->plt->output_offset
7434 + 2);
7435 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7436 rela.r_addend = 0;
7437 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7438 loc += sizeof (Elf32_External_Rela);
7439
7440 /* Output the @l relocation for the second instruction. */
7441 rela.r_offset = (htab->plt->output_section->vma
7442 + htab->plt->output_offset
7443 + 6);
7444 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7445 rela.r_addend = 0;
7446 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7447 loc += sizeof (Elf32_External_Rela);
7448
7449 /* Fix up the remaining relocations. They may have the wrong
7450 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7451 in which symbols were output. */
7452 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7453 {
7454 Elf_Internal_Rela rel;
7455
7456 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7457 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7458 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7459 loc += sizeof (Elf32_External_Rela);
7460
7461 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7462 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7463 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7464 loc += sizeof (Elf32_External_Rela);
7465
7466 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7467 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7468 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7469 loc += sizeof (Elf32_External_Rela);
7470 }
7471 }
7472 }
7473
7474 if (htab->glink != NULL && htab->glink->contents != NULL)
7475 {
7476 unsigned char *p;
7477 unsigned char *endp;
7478 bfd_vma res0;
7479 unsigned int i;
7480
7481 /*
7482 * PIC glink code is the following:
7483 *
7484 * # ith PLT code stub.
7485 * addis 11,30,(plt+(i-1)*4-got)@ha
7486 * lwz 11,(plt+(i-1)*4-got)@l(11)
7487 * mtctr 11
7488 * bctr
7489 *
7490 * # A table of branches, one for each plt entry.
7491 * # The idea is that the plt call stub loads ctr (and r11) with these
7492 * # addresses, so (r11 - res_0) gives the plt index * 4.
7493 * res_0: b PLTresolve
7494 * res_1: b PLTresolve
7495 * .
7496 * # Some number of entries towards the end can be nops
7497 * res_n_m3: nop
7498 * res_n_m2: nop
7499 * res_n_m1:
7500 *
7501 * PLTresolve:
7502 * addis 11,11,(1f-res_0)@ha
7503 * mflr 0
7504 * bcl 20,31,1f
7505 * 1: addi 11,11,(1b-res_0)@l
7506 * mflr 12
7507 * mtlr 0
7508 * sub 11,11,12 # r11 = index * 4
7509 * addis 12,12,(got+4-1b)@ha
7510 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7511 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7512 * mtctr 0
7513 * add 0,11,11
7514 * add 11,0,11 # r11 = index * 12 = reloc offset.
7515 * bctr
7516 */
7517 static const unsigned int pic_plt_resolve[] =
7518 {
7519 ADDIS_11_11,
7520 MFLR_0,
7521 BCL_20_31,
7522 ADDI_11_11,
7523 MFLR_12,
7524 MTLR_0,
7525 SUB_11_11_12,
7526 ADDIS_12_12,
7527 LWZ_0_12,
7528 LWZ_12_12,
7529 MTCTR_0,
7530 ADD_0_11_11,
7531 ADD_11_0_11,
7532 BCTR,
7533 NOP,
7534 NOP
7535 };
7536
7537 static const unsigned int plt_resolve[] =
7538 {
7539 LIS_12,
7540 ADDIS_11_11,
7541 LWZ_0_12,
7542 ADDI_11_11,
7543 MTCTR_0,
7544 ADD_0_11_11,
7545 LWZ_12_12,
7546 ADD_11_0_11,
7547 BCTR,
7548 NOP,
7549 NOP,
7550 NOP,
7551 NOP,
7552 NOP,
7553 NOP,
7554 NOP
7555 };
7556
7557 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7558 abort ();
7559 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7560 abort ();
7561
7562 /* Build the branch table, one for each plt entry (less one),
7563 and perhaps some padding. */
7564 p = htab->glink->contents;
7565 p += htab->glink_pltresolve;
7566 endp = htab->glink->contents;
7567 endp += htab->glink->size - GLINK_PLTRESOLVE;
7568 while (p < endp - 8 * 4)
7569 {
7570 bfd_put_32 (output_bfd, B + endp - p, p);
7571 p += 4;
7572 }
7573 while (p < endp)
7574 {
7575 bfd_put_32 (output_bfd, NOP, p);
7576 p += 4;
7577 }
7578
7579 res0 = (htab->glink_pltresolve
7580 + htab->glink->output_section->vma
7581 + htab->glink->output_offset);
7582
7583 /* Last comes the PLTresolve stub. */
7584 if (info->shared || info->pie)
7585 {
7586 bfd_vma bcl;
7587
7588 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7589 {
7590 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7591 p += 4;
7592 }
7593 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7594
7595 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7596 + htab->glink->output_section->vma
7597 + htab->glink->output_offset);
7598
7599 bfd_put_32 (output_bfd,
7600 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7601 bfd_put_32 (output_bfd,
7602 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7603 bfd_put_32 (output_bfd,
7604 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7605 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7606 {
7607 bfd_put_32 (output_bfd,
7608 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7609 bfd_put_32 (output_bfd,
7610 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7611 }
7612 else
7613 {
7614 bfd_put_32 (output_bfd,
7615 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7616 bfd_put_32 (output_bfd,
7617 LWZ_12_12 + 4, p + 9*4);
7618 }
7619 }
7620 else
7621 {
7622 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7623 {
7624 bfd_put_32 (output_bfd, plt_resolve[i], p);
7625 p += 4;
7626 }
7627 p -= 4 * ARRAY_SIZE (plt_resolve);
7628
7629 bfd_put_32 (output_bfd,
7630 LIS_12 + PPC_HA (got + 4), p + 0*4);
7631 bfd_put_32 (output_bfd,
7632 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7633 bfd_put_32 (output_bfd,
7634 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7635 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7636 {
7637 bfd_put_32 (output_bfd,
7638 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7639 bfd_put_32 (output_bfd,
7640 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7641 }
7642 else
7643 {
7644 bfd_put_32 (output_bfd,
7645 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7646 bfd_put_32 (output_bfd,
7647 LWZ_12_12 + 4, p + 6*4);
7648 }
7649 }
7650 }
7651
7652 return TRUE;
7653 }
7654 \f
7655 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7656 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7657 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7658 #define TARGET_BIG_NAME "elf32-powerpc"
7659 #define ELF_ARCH bfd_arch_powerpc
7660 #define ELF_MACHINE_CODE EM_PPC
7661 #ifdef __QNXTARGET__
7662 #define ELF_MAXPAGESIZE 0x1000
7663 #else
7664 #define ELF_MAXPAGESIZE 0x10000
7665 #endif
7666 #define ELF_MINPAGESIZE 0x1000
7667 #define ELF_COMMONPAGESIZE 0x1000
7668 #define elf_info_to_howto ppc_elf_info_to_howto
7669
7670 #ifdef EM_CYGNUS_POWERPC
7671 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7672 #endif
7673
7674 #ifdef EM_PPC_OLD
7675 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7676 #endif
7677
7678 #define elf_backend_plt_not_loaded 1
7679 #define elf_backend_can_gc_sections 1
7680 #define elf_backend_can_refcount 1
7681 #define elf_backend_rela_normal 1
7682
7683 #define bfd_elf32_mkobject ppc_elf_mkobject
7684 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7685 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7686 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7687 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7688 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7689 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7690
7691 #define elf_backend_object_p ppc_elf_object_p
7692 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7693 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7694 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7695 #define elf_backend_relocate_section ppc_elf_relocate_section
7696 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7697 #define elf_backend_check_relocs ppc_elf_check_relocs
7698 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7699 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7700 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7701 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7702 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7703 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7704 #define elf_backend_fake_sections ppc_elf_fake_sections
7705 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7706 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7707 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7708 #define elf_backend_write_core_note ppc_elf_write_core_note
7709 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7710 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7711 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7712 #define elf_backend_write_section ppc_elf_write_section
7713 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7714 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7715 #define elf_backend_action_discarded ppc_elf_action_discarded
7716 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7717
7718 #include "elf32-target.h"
7719
7720 /* VxWorks Target */
7721
7722 #undef TARGET_LITTLE_SYM
7723 #undef TARGET_LITTLE_NAME
7724
7725 #undef TARGET_BIG_SYM
7726 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7727 #undef TARGET_BIG_NAME
7728 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7729
7730 /* VxWorks uses the elf default section flags for .plt. */
7731 static const struct bfd_elf_special_section *
7732 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7733 {
7734 if (sec->name == NULL)
7735 return NULL;
7736
7737 if (strcmp (sec->name, ".plt") == 0)
7738 return _bfd_elf_get_sec_type_attr (abfd, sec);
7739
7740 return ppc_elf_get_sec_type_attr (abfd, sec);
7741 }
7742
7743 /* Like ppc_elf_link_hash_table_create, but overrides
7744 appropriately for VxWorks. */
7745 static struct bfd_link_hash_table *
7746 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7747 {
7748 struct bfd_link_hash_table *ret;
7749
7750 ret = ppc_elf_link_hash_table_create (abfd);
7751 if (ret)
7752 {
7753 struct ppc_elf_link_hash_table *htab
7754 = (struct ppc_elf_link_hash_table *)ret;
7755 htab->is_vxworks = 1;
7756 htab->plt_type = PLT_VXWORKS;
7757 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7758 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7759 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7760 }
7761 return ret;
7762 }
7763
7764 /* Tweak magic VxWorks symbols as they are loaded. */
7765 static bfd_boolean
7766 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7767 struct bfd_link_info *info,
7768 Elf_Internal_Sym *sym,
7769 const char **namep ATTRIBUTE_UNUSED,
7770 flagword *flagsp ATTRIBUTE_UNUSED,
7771 asection **secp,
7772 bfd_vma *valp)
7773 {
7774 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7775 valp))
7776 return FALSE;
7777
7778 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7779 }
7780
7781 static void
7782 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7783 {
7784 ppc_elf_final_write_processing(abfd, linker);
7785 elf_vxworks_final_write_processing(abfd, linker);
7786 }
7787
7788 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7789 define it. */
7790 #undef elf_backend_want_plt_sym
7791 #define elf_backend_want_plt_sym 1
7792 #undef elf_backend_want_got_plt
7793 #define elf_backend_want_got_plt 1
7794 #undef elf_backend_got_symbol_offset
7795 #define elf_backend_got_symbol_offset 0
7796 #undef elf_backend_plt_not_loaded
7797 #define elf_backend_plt_not_loaded 0
7798 #undef elf_backend_plt_readonly
7799 #define elf_backend_plt_readonly 1
7800 #undef elf_backend_got_header_size
7801 #define elf_backend_got_header_size 12
7802
7803 #undef bfd_elf32_bfd_link_hash_table_create
7804 #define bfd_elf32_bfd_link_hash_table_create \
7805 ppc_elf_vxworks_link_hash_table_create
7806 #undef elf_backend_add_symbol_hook
7807 #define elf_backend_add_symbol_hook \
7808 ppc_elf_vxworks_add_symbol_hook
7809 #undef elf_backend_link_output_symbol_hook
7810 #define elf_backend_link_output_symbol_hook \
7811 elf_vxworks_link_output_symbol_hook
7812 #undef elf_backend_final_write_processing
7813 #define elf_backend_final_write_processing \
7814 ppc_elf_vxworks_final_write_processing
7815 #undef elf_backend_get_sec_type_attr
7816 #define elf_backend_get_sec_type_attr \
7817 ppc_elf_vxworks_get_sec_type_attr
7818 #undef elf_backend_emit_relocs
7819 #define elf_backend_emit_relocs \
7820 elf_vxworks_emit_relocs
7821
7822 #undef elf32_bed
7823 #define elf32_bed ppc_elf_vxworks_bed
7824
7825 #include "elf32-target.h"
GDB Binutils - Deliverables
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