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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, 2008 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160 \f
161 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
162
163 static reloc_howto_type ppc_elf_howto_raw[] = {
164 /* This reloc does nothing. */
165 HOWTO (R_PPC_NONE, /* type */
166 0, /* rightshift */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
168 32, /* bitsize */
169 FALSE, /* pc_relative */
170 0, /* bitpos */
171 complain_overflow_bitfield, /* complain_on_overflow */
172 bfd_elf_generic_reloc, /* special_function */
173 "R_PPC_NONE", /* name */
174 FALSE, /* partial_inplace */
175 0, /* src_mask */
176 0, /* dst_mask */
177 FALSE), /* pcrel_offset */
178
179 /* A standard 32 bit relocation. */
180 HOWTO (R_PPC_ADDR32, /* type */
181 0, /* rightshift */
182 2, /* size (0 = byte, 1 = short, 2 = long) */
183 32, /* bitsize */
184 FALSE, /* pc_relative */
185 0, /* bitpos */
186 complain_overflow_bitfield, /* complain_on_overflow */
187 bfd_elf_generic_reloc, /* special_function */
188 "R_PPC_ADDR32", /* name */
189 FALSE, /* partial_inplace */
190 0, /* src_mask */
191 0xffffffff, /* dst_mask */
192 FALSE), /* pcrel_offset */
193
194 /* An absolute 26 bit branch; the lower two bits must be zero.
195 FIXME: we don't check that, we just clear them. */
196 HOWTO (R_PPC_ADDR24, /* type */
197 0, /* rightshift */
198 2, /* size (0 = byte, 1 = short, 2 = long) */
199 26, /* bitsize */
200 FALSE, /* pc_relative */
201 0, /* bitpos */
202 complain_overflow_bitfield, /* complain_on_overflow */
203 bfd_elf_generic_reloc, /* special_function */
204 "R_PPC_ADDR24", /* name */
205 FALSE, /* partial_inplace */
206 0, /* src_mask */
207 0x3fffffc, /* dst_mask */
208 FALSE), /* pcrel_offset */
209
210 /* A standard 16 bit relocation. */
211 HOWTO (R_PPC_ADDR16, /* type */
212 0, /* rightshift */
213 1, /* size (0 = byte, 1 = short, 2 = long) */
214 16, /* bitsize */
215 FALSE, /* pc_relative */
216 0, /* bitpos */
217 complain_overflow_bitfield, /* complain_on_overflow */
218 bfd_elf_generic_reloc, /* special_function */
219 "R_PPC_ADDR16", /* name */
220 FALSE, /* partial_inplace */
221 0, /* src_mask */
222 0xffff, /* dst_mask */
223 FALSE), /* pcrel_offset */
224
225 /* A 16 bit relocation without overflow. */
226 HOWTO (R_PPC_ADDR16_LO, /* type */
227 0, /* rightshift */
228 1, /* size (0 = byte, 1 = short, 2 = long) */
229 16, /* bitsize */
230 FALSE, /* pc_relative */
231 0, /* bitpos */
232 complain_overflow_dont,/* complain_on_overflow */
233 bfd_elf_generic_reloc, /* special_function */
234 "R_PPC_ADDR16_LO", /* name */
235 FALSE, /* partial_inplace */
236 0, /* src_mask */
237 0xffff, /* dst_mask */
238 FALSE), /* pcrel_offset */
239
240 /* The high order 16 bits of an address. */
241 HOWTO (R_PPC_ADDR16_HI, /* type */
242 16, /* rightshift */
243 1, /* size (0 = byte, 1 = short, 2 = long) */
244 16, /* bitsize */
245 FALSE, /* pc_relative */
246 0, /* bitpos */
247 complain_overflow_dont, /* complain_on_overflow */
248 bfd_elf_generic_reloc, /* special_function */
249 "R_PPC_ADDR16_HI", /* name */
250 FALSE, /* partial_inplace */
251 0, /* src_mask */
252 0xffff, /* dst_mask */
253 FALSE), /* pcrel_offset */
254
255 /* The high order 16 bits of an address, plus 1 if the contents of
256 the low 16 bits, treated as a signed number, is negative. */
257 HOWTO (R_PPC_ADDR16_HA, /* type */
258 16, /* rightshift */
259 1, /* size (0 = byte, 1 = short, 2 = long) */
260 16, /* bitsize */
261 FALSE, /* pc_relative */
262 0, /* bitpos */
263 complain_overflow_dont, /* complain_on_overflow */
264 ppc_elf_addr16_ha_reloc, /* special_function */
265 "R_PPC_ADDR16_HA", /* name */
266 FALSE, /* partial_inplace */
267 0, /* src_mask */
268 0xffff, /* dst_mask */
269 FALSE), /* pcrel_offset */
270
271 /* An absolute 16 bit branch; the lower two bits must be zero.
272 FIXME: we don't check that, we just clear them. */
273 HOWTO (R_PPC_ADDR14, /* type */
274 0, /* rightshift */
275 2, /* size (0 = byte, 1 = short, 2 = long) */
276 16, /* bitsize */
277 FALSE, /* pc_relative */
278 0, /* bitpos */
279 complain_overflow_bitfield, /* complain_on_overflow */
280 bfd_elf_generic_reloc, /* special_function */
281 "R_PPC_ADDR14", /* name */
282 FALSE, /* partial_inplace */
283 0, /* src_mask */
284 0xfffc, /* dst_mask */
285 FALSE), /* pcrel_offset */
286
287 /* An absolute 16 bit branch, for which bit 10 should be set to
288 indicate that the branch is expected to be taken. The lower two
289 bits must be zero. */
290 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
291 0, /* rightshift */
292 2, /* size (0 = byte, 1 = short, 2 = long) */
293 16, /* bitsize */
294 FALSE, /* pc_relative */
295 0, /* bitpos */
296 complain_overflow_bitfield, /* complain_on_overflow */
297 bfd_elf_generic_reloc, /* special_function */
298 "R_PPC_ADDR14_BRTAKEN",/* name */
299 FALSE, /* partial_inplace */
300 0, /* src_mask */
301 0xfffc, /* dst_mask */
302 FALSE), /* pcrel_offset */
303
304 /* An absolute 16 bit branch, for which bit 10 should be set to
305 indicate that the branch is not expected to be taken. The lower
306 two bits must be zero. */
307 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
308 0, /* rightshift */
309 2, /* size (0 = byte, 1 = short, 2 = long) */
310 16, /* bitsize */
311 FALSE, /* pc_relative */
312 0, /* bitpos */
313 complain_overflow_bitfield, /* complain_on_overflow */
314 bfd_elf_generic_reloc, /* special_function */
315 "R_PPC_ADDR14_BRNTAKEN",/* name */
316 FALSE, /* partial_inplace */
317 0, /* src_mask */
318 0xfffc, /* dst_mask */
319 FALSE), /* pcrel_offset */
320
321 /* A relative 26 bit branch; the lower two bits must be zero. */
322 HOWTO (R_PPC_REL24, /* type */
323 0, /* rightshift */
324 2, /* size (0 = byte, 1 = short, 2 = long) */
325 26, /* bitsize */
326 TRUE, /* pc_relative */
327 0, /* bitpos */
328 complain_overflow_signed, /* complain_on_overflow */
329 bfd_elf_generic_reloc, /* special_function */
330 "R_PPC_REL24", /* name */
331 FALSE, /* partial_inplace */
332 0, /* src_mask */
333 0x3fffffc, /* dst_mask */
334 TRUE), /* pcrel_offset */
335
336 /* A relative 16 bit branch; the lower two bits must be zero. */
337 HOWTO (R_PPC_REL14, /* type */
338 0, /* rightshift */
339 2, /* size (0 = byte, 1 = short, 2 = long) */
340 16, /* bitsize */
341 TRUE, /* pc_relative */
342 0, /* bitpos */
343 complain_overflow_signed, /* complain_on_overflow */
344 bfd_elf_generic_reloc, /* special_function */
345 "R_PPC_REL14", /* name */
346 FALSE, /* partial_inplace */
347 0, /* src_mask */
348 0xfffc, /* dst_mask */
349 TRUE), /* pcrel_offset */
350
351 /* A relative 16 bit branch. Bit 10 should be set to indicate that
352 the branch is expected to be taken. The lower two bits must be
353 zero. */
354 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
355 0, /* rightshift */
356 2, /* size (0 = byte, 1 = short, 2 = long) */
357 16, /* bitsize */
358 TRUE, /* pc_relative */
359 0, /* bitpos */
360 complain_overflow_signed, /* complain_on_overflow */
361 bfd_elf_generic_reloc, /* special_function */
362 "R_PPC_REL14_BRTAKEN", /* name */
363 FALSE, /* partial_inplace */
364 0, /* src_mask */
365 0xfffc, /* dst_mask */
366 TRUE), /* pcrel_offset */
367
368 /* A relative 16 bit branch. Bit 10 should be set to indicate that
369 the branch is not expected to be taken. The lower two bits must
370 be zero. */
371 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
372 0, /* rightshift */
373 2, /* size (0 = byte, 1 = short, 2 = long) */
374 16, /* bitsize */
375 TRUE, /* pc_relative */
376 0, /* bitpos */
377 complain_overflow_signed, /* complain_on_overflow */
378 bfd_elf_generic_reloc, /* special_function */
379 "R_PPC_REL14_BRNTAKEN",/* name */
380 FALSE, /* partial_inplace */
381 0, /* src_mask */
382 0xfffc, /* dst_mask */
383 TRUE), /* pcrel_offset */
384
385 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
386 symbol. */
387 HOWTO (R_PPC_GOT16, /* type */
388 0, /* rightshift */
389 1, /* size (0 = byte, 1 = short, 2 = long) */
390 16, /* bitsize */
391 FALSE, /* pc_relative */
392 0, /* bitpos */
393 complain_overflow_signed, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 "R_PPC_GOT16", /* name */
396 FALSE, /* partial_inplace */
397 0, /* src_mask */
398 0xffff, /* dst_mask */
399 FALSE), /* pcrel_offset */
400
401 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
402 the symbol. */
403 HOWTO (R_PPC_GOT16_LO, /* type */
404 0, /* rightshift */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
406 16, /* bitsize */
407 FALSE, /* pc_relative */
408 0, /* bitpos */
409 complain_overflow_dont, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 "R_PPC_GOT16_LO", /* name */
412 FALSE, /* partial_inplace */
413 0, /* src_mask */
414 0xffff, /* dst_mask */
415 FALSE), /* pcrel_offset */
416
417 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
418 the symbol. */
419 HOWTO (R_PPC_GOT16_HI, /* type */
420 16, /* rightshift */
421 1, /* size (0 = byte, 1 = short, 2 = long) */
422 16, /* bitsize */
423 FALSE, /* pc_relative */
424 0, /* bitpos */
425 complain_overflow_bitfield, /* complain_on_overflow */
426 bfd_elf_generic_reloc, /* special_function */
427 "R_PPC_GOT16_HI", /* name */
428 FALSE, /* partial_inplace */
429 0, /* src_mask */
430 0xffff, /* dst_mask */
431 FALSE), /* pcrel_offset */
432
433 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
434 the symbol. */
435 HOWTO (R_PPC_GOT16_HA, /* type */
436 16, /* rightshift */
437 1, /* size (0 = byte, 1 = short, 2 = long) */
438 16, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_bitfield, /* complain_on_overflow */
442 ppc_elf_addr16_ha_reloc, /* special_function */
443 "R_PPC_GOT16_HA", /* name */
444 FALSE, /* partial_inplace */
445 0, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Like R_PPC_REL24, but referring to the procedure linkage table
450 entry for the symbol. */
451 HOWTO (R_PPC_PLTREL24, /* type */
452 0, /* rightshift */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
454 26, /* bitsize */
455 TRUE, /* pc_relative */
456 0, /* bitpos */
457 complain_overflow_signed, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 "R_PPC_PLTREL24", /* name */
460 FALSE, /* partial_inplace */
461 0, /* src_mask */
462 0x3fffffc, /* dst_mask */
463 TRUE), /* pcrel_offset */
464
465 /* This is used only by the dynamic linker. The symbol should exist
466 both in the object being run and in some shared library. The
467 dynamic linker copies the data addressed by the symbol from the
468 shared library into the object, because the object being
469 run has to have the data at some particular address. */
470 HOWTO (R_PPC_COPY, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 32, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_bitfield, /* complain_on_overflow */
477 bfd_elf_generic_reloc, /* special_function */
478 "R_PPC_COPY", /* name */
479 FALSE, /* partial_inplace */
480 0, /* src_mask */
481 0, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* Like R_PPC_ADDR32, but used when setting global offset table
485 entries. */
486 HOWTO (R_PPC_GLOB_DAT, /* type */
487 0, /* rightshift */
488 2, /* size (0 = byte, 1 = short, 2 = long) */
489 32, /* bitsize */
490 FALSE, /* pc_relative */
491 0, /* bitpos */
492 complain_overflow_bitfield, /* complain_on_overflow */
493 bfd_elf_generic_reloc, /* special_function */
494 "R_PPC_GLOB_DAT", /* name */
495 FALSE, /* partial_inplace */
496 0, /* src_mask */
497 0xffffffff, /* dst_mask */
498 FALSE), /* pcrel_offset */
499
500 /* Marks a procedure linkage table entry for a symbol. */
501 HOWTO (R_PPC_JMP_SLOT, /* type */
502 0, /* rightshift */
503 2, /* size (0 = byte, 1 = short, 2 = long) */
504 32, /* bitsize */
505 FALSE, /* pc_relative */
506 0, /* bitpos */
507 complain_overflow_bitfield, /* complain_on_overflow */
508 bfd_elf_generic_reloc, /* special_function */
509 "R_PPC_JMP_SLOT", /* name */
510 FALSE, /* partial_inplace */
511 0, /* src_mask */
512 0, /* dst_mask */
513 FALSE), /* pcrel_offset */
514
515 /* Used only by the dynamic linker. When the object is run, this
516 longword is set to the load address of the object, plus the
517 addend. */
518 HOWTO (R_PPC_RELATIVE, /* type */
519 0, /* rightshift */
520 2, /* size (0 = byte, 1 = short, 2 = long) */
521 32, /* bitsize */
522 FALSE, /* pc_relative */
523 0, /* bitpos */
524 complain_overflow_bitfield, /* complain_on_overflow */
525 bfd_elf_generic_reloc, /* special_function */
526 "R_PPC_RELATIVE", /* name */
527 FALSE, /* partial_inplace */
528 0, /* src_mask */
529 0xffffffff, /* dst_mask */
530 FALSE), /* pcrel_offset */
531
532 /* Like R_PPC_REL24, but uses the value of the symbol within the
533 object rather than the final value. Normally used for
534 _GLOBAL_OFFSET_TABLE_. */
535 HOWTO (R_PPC_LOCAL24PC, /* type */
536 0, /* rightshift */
537 2, /* size (0 = byte, 1 = short, 2 = long) */
538 26, /* bitsize */
539 TRUE, /* pc_relative */
540 0, /* bitpos */
541 complain_overflow_signed, /* complain_on_overflow */
542 bfd_elf_generic_reloc, /* special_function */
543 "R_PPC_LOCAL24PC", /* name */
544 FALSE, /* partial_inplace */
545 0, /* src_mask */
546 0x3fffffc, /* dst_mask */
547 TRUE), /* pcrel_offset */
548
549 /* Like R_PPC_ADDR32, but may be unaligned. */
550 HOWTO (R_PPC_UADDR32, /* type */
551 0, /* rightshift */
552 2, /* size (0 = byte, 1 = short, 2 = long) */
553 32, /* bitsize */
554 FALSE, /* pc_relative */
555 0, /* bitpos */
556 complain_overflow_bitfield, /* complain_on_overflow */
557 bfd_elf_generic_reloc, /* special_function */
558 "R_PPC_UADDR32", /* name */
559 FALSE, /* partial_inplace */
560 0, /* src_mask */
561 0xffffffff, /* dst_mask */
562 FALSE), /* pcrel_offset */
563
564 /* Like R_PPC_ADDR16, but may be unaligned. */
565 HOWTO (R_PPC_UADDR16, /* type */
566 0, /* rightshift */
567 1, /* size (0 = byte, 1 = short, 2 = long) */
568 16, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_bitfield, /* complain_on_overflow */
572 bfd_elf_generic_reloc, /* special_function */
573 "R_PPC_UADDR16", /* name */
574 FALSE, /* partial_inplace */
575 0, /* src_mask */
576 0xffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 /* 32-bit PC relative */
580 HOWTO (R_PPC_REL32, /* type */
581 0, /* rightshift */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
583 32, /* bitsize */
584 TRUE, /* pc_relative */
585 0, /* bitpos */
586 complain_overflow_bitfield, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 "R_PPC_REL32", /* name */
589 FALSE, /* partial_inplace */
590 0, /* src_mask */
591 0xffffffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
593
594 /* 32-bit relocation to the symbol's procedure linkage table.
595 FIXME: not supported. */
596 HOWTO (R_PPC_PLT32, /* type */
597 0, /* rightshift */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
599 32, /* bitsize */
600 FALSE, /* pc_relative */
601 0, /* bitpos */
602 complain_overflow_bitfield, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 "R_PPC_PLT32", /* name */
605 FALSE, /* partial_inplace */
606 0, /* src_mask */
607 0, /* dst_mask */
608 FALSE), /* pcrel_offset */
609
610 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
611 FIXME: not supported. */
612 HOWTO (R_PPC_PLTREL32, /* type */
613 0, /* rightshift */
614 2, /* size (0 = byte, 1 = short, 2 = long) */
615 32, /* bitsize */
616 TRUE, /* pc_relative */
617 0, /* bitpos */
618 complain_overflow_bitfield, /* complain_on_overflow */
619 bfd_elf_generic_reloc, /* special_function */
620 "R_PPC_PLTREL32", /* name */
621 FALSE, /* partial_inplace */
622 0, /* src_mask */
623 0, /* dst_mask */
624 TRUE), /* pcrel_offset */
625
626 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
627 the symbol. */
628 HOWTO (R_PPC_PLT16_LO, /* type */
629 0, /* rightshift */
630 1, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_dont, /* complain_on_overflow */
635 bfd_elf_generic_reloc, /* special_function */
636 "R_PPC_PLT16_LO", /* name */
637 FALSE, /* partial_inplace */
638 0, /* src_mask */
639 0xffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
643 the symbol. */
644 HOWTO (R_PPC_PLT16_HI, /* type */
645 16, /* rightshift */
646 1, /* size (0 = byte, 1 = short, 2 = long) */
647 16, /* bitsize */
648 FALSE, /* pc_relative */
649 0, /* bitpos */
650 complain_overflow_bitfield, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 "R_PPC_PLT16_HI", /* name */
653 FALSE, /* partial_inplace */
654 0, /* src_mask */
655 0xffff, /* dst_mask */
656 FALSE), /* pcrel_offset */
657
658 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
659 the symbol. */
660 HOWTO (R_PPC_PLT16_HA, /* type */
661 16, /* rightshift */
662 1, /* size (0 = byte, 1 = short, 2 = long) */
663 16, /* bitsize */
664 FALSE, /* pc_relative */
665 0, /* bitpos */
666 complain_overflow_bitfield, /* complain_on_overflow */
667 ppc_elf_addr16_ha_reloc, /* special_function */
668 "R_PPC_PLT16_HA", /* name */
669 FALSE, /* partial_inplace */
670 0, /* src_mask */
671 0xffff, /* dst_mask */
672 FALSE), /* pcrel_offset */
673
674 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
675 small data items. */
676 HOWTO (R_PPC_SDAREL16, /* type */
677 0, /* rightshift */
678 1, /* size (0 = byte, 1 = short, 2 = long) */
679 16, /* bitsize */
680 FALSE, /* pc_relative */
681 0, /* bitpos */
682 complain_overflow_signed, /* complain_on_overflow */
683 bfd_elf_generic_reloc, /* special_function */
684 "R_PPC_SDAREL16", /* name */
685 FALSE, /* partial_inplace */
686 0, /* src_mask */
687 0xffff, /* dst_mask */
688 FALSE), /* pcrel_offset */
689
690 /* 16-bit section relative relocation. */
691 HOWTO (R_PPC_SECTOFF, /* type */
692 0, /* rightshift */
693 1, /* size (0 = byte, 1 = short, 2 = long) */
694 16, /* bitsize */
695 FALSE, /* pc_relative */
696 0, /* bitpos */
697 complain_overflow_bitfield, /* complain_on_overflow */
698 bfd_elf_generic_reloc, /* special_function */
699 "R_PPC_SECTOFF", /* name */
700 FALSE, /* partial_inplace */
701 0, /* src_mask */
702 0xffff, /* dst_mask */
703 FALSE), /* pcrel_offset */
704
705 /* 16-bit lower half section relative relocation. */
706 HOWTO (R_PPC_SECTOFF_LO, /* type */
707 0, /* rightshift */
708 1, /* size (0 = byte, 1 = short, 2 = long) */
709 16, /* bitsize */
710 FALSE, /* pc_relative */
711 0, /* bitpos */
712 complain_overflow_dont, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 "R_PPC_SECTOFF_LO", /* name */
715 FALSE, /* partial_inplace */
716 0, /* src_mask */
717 0xffff, /* dst_mask */
718 FALSE), /* pcrel_offset */
719
720 /* 16-bit upper half section relative relocation. */
721 HOWTO (R_PPC_SECTOFF_HI, /* type */
722 16, /* rightshift */
723 1, /* size (0 = byte, 1 = short, 2 = long) */
724 16, /* bitsize */
725 FALSE, /* pc_relative */
726 0, /* bitpos */
727 complain_overflow_bitfield, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 "R_PPC_SECTOFF_HI", /* name */
730 FALSE, /* partial_inplace */
731 0, /* src_mask */
732 0xffff, /* dst_mask */
733 FALSE), /* pcrel_offset */
734
735 /* 16-bit upper half adjusted section relative relocation. */
736 HOWTO (R_PPC_SECTOFF_HA, /* type */
737 16, /* rightshift */
738 1, /* size (0 = byte, 1 = short, 2 = long) */
739 16, /* bitsize */
740 FALSE, /* pc_relative */
741 0, /* bitpos */
742 complain_overflow_bitfield, /* complain_on_overflow */
743 ppc_elf_addr16_ha_reloc, /* special_function */
744 "R_PPC_SECTOFF_HA", /* name */
745 FALSE, /* partial_inplace */
746 0, /* src_mask */
747 0xffff, /* dst_mask */
748 FALSE), /* pcrel_offset */
749
750 /* Marker reloc for TLS. */
751 HOWTO (R_PPC_TLS,
752 0, /* rightshift */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
754 32, /* bitsize */
755 FALSE, /* pc_relative */
756 0, /* bitpos */
757 complain_overflow_dont, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 "R_PPC_TLS", /* name */
760 FALSE, /* partial_inplace */
761 0, /* src_mask */
762 0, /* dst_mask */
763 FALSE), /* pcrel_offset */
764
765 /* Computes the load module index of the load module that contains the
766 definition of its TLS sym. */
767 HOWTO (R_PPC_DTPMOD32,
768 0, /* rightshift */
769 2, /* size (0 = byte, 1 = short, 2 = long) */
770 32, /* bitsize */
771 FALSE, /* pc_relative */
772 0, /* bitpos */
773 complain_overflow_dont, /* complain_on_overflow */
774 ppc_elf_unhandled_reloc, /* special_function */
775 "R_PPC_DTPMOD32", /* name */
776 FALSE, /* partial_inplace */
777 0, /* src_mask */
778 0xffffffff, /* dst_mask */
779 FALSE), /* pcrel_offset */
780
781 /* Computes a dtv-relative displacement, the difference between the value
782 of sym+add and the base address of the thread-local storage block that
783 contains the definition of sym, minus 0x8000. */
784 HOWTO (R_PPC_DTPREL32,
785 0, /* rightshift */
786 2, /* size (0 = byte, 1 = short, 2 = long) */
787 32, /* bitsize */
788 FALSE, /* pc_relative */
789 0, /* bitpos */
790 complain_overflow_dont, /* complain_on_overflow */
791 ppc_elf_unhandled_reloc, /* special_function */
792 "R_PPC_DTPREL32", /* name */
793 FALSE, /* partial_inplace */
794 0, /* src_mask */
795 0xffffffff, /* dst_mask */
796 FALSE), /* pcrel_offset */
797
798 /* A 16 bit dtprel reloc. */
799 HOWTO (R_PPC_DTPREL16,
800 0, /* rightshift */
801 1, /* size (0 = byte, 1 = short, 2 = long) */
802 16, /* bitsize */
803 FALSE, /* pc_relative */
804 0, /* bitpos */
805 complain_overflow_signed, /* complain_on_overflow */
806 ppc_elf_unhandled_reloc, /* special_function */
807 "R_PPC_DTPREL16", /* name */
808 FALSE, /* partial_inplace */
809 0, /* src_mask */
810 0xffff, /* dst_mask */
811 FALSE), /* pcrel_offset */
812
813 /* Like DTPREL16, but no overflow. */
814 HOWTO (R_PPC_DTPREL16_LO,
815 0, /* rightshift */
816 1, /* size (0 = byte, 1 = short, 2 = long) */
817 16, /* bitsize */
818 FALSE, /* pc_relative */
819 0, /* bitpos */
820 complain_overflow_dont, /* complain_on_overflow */
821 ppc_elf_unhandled_reloc, /* special_function */
822 "R_PPC_DTPREL16_LO", /* name */
823 FALSE, /* partial_inplace */
824 0, /* src_mask */
825 0xffff, /* dst_mask */
826 FALSE), /* pcrel_offset */
827
828 /* Like DTPREL16_LO, but next higher group of 16 bits. */
829 HOWTO (R_PPC_DTPREL16_HI,
830 16, /* rightshift */
831 1, /* size (0 = byte, 1 = short, 2 = long) */
832 16, /* bitsize */
833 FALSE, /* pc_relative */
834 0, /* bitpos */
835 complain_overflow_dont, /* complain_on_overflow */
836 ppc_elf_unhandled_reloc, /* special_function */
837 "R_PPC_DTPREL16_HI", /* name */
838 FALSE, /* partial_inplace */
839 0, /* src_mask */
840 0xffff, /* dst_mask */
841 FALSE), /* pcrel_offset */
842
843 /* Like DTPREL16_HI, but adjust for low 16 bits. */
844 HOWTO (R_PPC_DTPREL16_HA,
845 16, /* rightshift */
846 1, /* size (0 = byte, 1 = short, 2 = long) */
847 16, /* bitsize */
848 FALSE, /* pc_relative */
849 0, /* bitpos */
850 complain_overflow_dont, /* complain_on_overflow */
851 ppc_elf_unhandled_reloc, /* special_function */
852 "R_PPC_DTPREL16_HA", /* name */
853 FALSE, /* partial_inplace */
854 0, /* src_mask */
855 0xffff, /* dst_mask */
856 FALSE), /* pcrel_offset */
857
858 /* Computes a tp-relative displacement, the difference between the value of
859 sym+add and the value of the thread pointer (r13). */
860 HOWTO (R_PPC_TPREL32,
861 0, /* rightshift */
862 2, /* size (0 = byte, 1 = short, 2 = long) */
863 32, /* bitsize */
864 FALSE, /* pc_relative */
865 0, /* bitpos */
866 complain_overflow_dont, /* complain_on_overflow */
867 ppc_elf_unhandled_reloc, /* special_function */
868 "R_PPC_TPREL32", /* name */
869 FALSE, /* partial_inplace */
870 0, /* src_mask */
871 0xffffffff, /* dst_mask */
872 FALSE), /* pcrel_offset */
873
874 /* A 16 bit tprel reloc. */
875 HOWTO (R_PPC_TPREL16,
876 0, /* rightshift */
877 1, /* size (0 = byte, 1 = short, 2 = long) */
878 16, /* bitsize */
879 FALSE, /* pc_relative */
880 0, /* bitpos */
881 complain_overflow_signed, /* complain_on_overflow */
882 ppc_elf_unhandled_reloc, /* special_function */
883 "R_PPC_TPREL16", /* name */
884 FALSE, /* partial_inplace */
885 0, /* src_mask */
886 0xffff, /* dst_mask */
887 FALSE), /* pcrel_offset */
888
889 /* Like TPREL16, but no overflow. */
890 HOWTO (R_PPC_TPREL16_LO,
891 0, /* rightshift */
892 1, /* size (0 = byte, 1 = short, 2 = long) */
893 16, /* bitsize */
894 FALSE, /* pc_relative */
895 0, /* bitpos */
896 complain_overflow_dont, /* complain_on_overflow */
897 ppc_elf_unhandled_reloc, /* special_function */
898 "R_PPC_TPREL16_LO", /* name */
899 FALSE, /* partial_inplace */
900 0, /* src_mask */
901 0xffff, /* dst_mask */
902 FALSE), /* pcrel_offset */
903
904 /* Like TPREL16_LO, but next higher group of 16 bits. */
905 HOWTO (R_PPC_TPREL16_HI,
906 16, /* rightshift */
907 1, /* size (0 = byte, 1 = short, 2 = long) */
908 16, /* bitsize */
909 FALSE, /* pc_relative */
910 0, /* bitpos */
911 complain_overflow_dont, /* complain_on_overflow */
912 ppc_elf_unhandled_reloc, /* special_function */
913 "R_PPC_TPREL16_HI", /* name */
914 FALSE, /* partial_inplace */
915 0, /* src_mask */
916 0xffff, /* dst_mask */
917 FALSE), /* pcrel_offset */
918
919 /* Like TPREL16_HI, but adjust for low 16 bits. */
920 HOWTO (R_PPC_TPREL16_HA,
921 16, /* rightshift */
922 1, /* size (0 = byte, 1 = short, 2 = long) */
923 16, /* bitsize */
924 FALSE, /* pc_relative */
925 0, /* bitpos */
926 complain_overflow_dont, /* complain_on_overflow */
927 ppc_elf_unhandled_reloc, /* special_function */
928 "R_PPC_TPREL16_HA", /* name */
929 FALSE, /* partial_inplace */
930 0, /* src_mask */
931 0xffff, /* dst_mask */
932 FALSE), /* pcrel_offset */
933
934 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
935 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
936 to the first entry. */
937 HOWTO (R_PPC_GOT_TLSGD16,
938 0, /* rightshift */
939 1, /* size (0 = byte, 1 = short, 2 = long) */
940 16, /* bitsize */
941 FALSE, /* pc_relative */
942 0, /* bitpos */
943 complain_overflow_signed, /* complain_on_overflow */
944 ppc_elf_unhandled_reloc, /* special_function */
945 "R_PPC_GOT_TLSGD16", /* name */
946 FALSE, /* partial_inplace */
947 0, /* src_mask */
948 0xffff, /* dst_mask */
949 FALSE), /* pcrel_offset */
950
951 /* Like GOT_TLSGD16, but no overflow. */
952 HOWTO (R_PPC_GOT_TLSGD16_LO,
953 0, /* rightshift */
954 1, /* size (0 = byte, 1 = short, 2 = long) */
955 16, /* bitsize */
956 FALSE, /* pc_relative */
957 0, /* bitpos */
958 complain_overflow_dont, /* complain_on_overflow */
959 ppc_elf_unhandled_reloc, /* special_function */
960 "R_PPC_GOT_TLSGD16_LO", /* name */
961 FALSE, /* partial_inplace */
962 0, /* src_mask */
963 0xffff, /* dst_mask */
964 FALSE), /* pcrel_offset */
965
966 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
967 HOWTO (R_PPC_GOT_TLSGD16_HI,
968 16, /* rightshift */
969 1, /* size (0 = byte, 1 = short, 2 = long) */
970 16, /* bitsize */
971 FALSE, /* pc_relative */
972 0, /* bitpos */
973 complain_overflow_dont, /* complain_on_overflow */
974 ppc_elf_unhandled_reloc, /* special_function */
975 "R_PPC_GOT_TLSGD16_HI", /* name */
976 FALSE, /* partial_inplace */
977 0, /* src_mask */
978 0xffff, /* dst_mask */
979 FALSE), /* pcrel_offset */
980
981 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
982 HOWTO (R_PPC_GOT_TLSGD16_HA,
983 16, /* rightshift */
984 1, /* size (0 = byte, 1 = short, 2 = long) */
985 16, /* bitsize */
986 FALSE, /* pc_relative */
987 0, /* bitpos */
988 complain_overflow_dont, /* complain_on_overflow */
989 ppc_elf_unhandled_reloc, /* special_function */
990 "R_PPC_GOT_TLSGD16_HA", /* name */
991 FALSE, /* partial_inplace */
992 0, /* src_mask */
993 0xffff, /* dst_mask */
994 FALSE), /* pcrel_offset */
995
996 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
997 with values (sym+add)@dtpmod and zero, and computes the offset to the
998 first entry. */
999 HOWTO (R_PPC_GOT_TLSLD16,
1000 0, /* rightshift */
1001 1, /* size (0 = byte, 1 = short, 2 = long) */
1002 16, /* bitsize */
1003 FALSE, /* pc_relative */
1004 0, /* bitpos */
1005 complain_overflow_signed, /* complain_on_overflow */
1006 ppc_elf_unhandled_reloc, /* special_function */
1007 "R_PPC_GOT_TLSLD16", /* name */
1008 FALSE, /* partial_inplace */
1009 0, /* src_mask */
1010 0xffff, /* dst_mask */
1011 FALSE), /* pcrel_offset */
1012
1013 /* Like GOT_TLSLD16, but no overflow. */
1014 HOWTO (R_PPC_GOT_TLSLD16_LO,
1015 0, /* rightshift */
1016 1, /* size (0 = byte, 1 = short, 2 = long) */
1017 16, /* bitsize */
1018 FALSE, /* pc_relative */
1019 0, /* bitpos */
1020 complain_overflow_dont, /* complain_on_overflow */
1021 ppc_elf_unhandled_reloc, /* special_function */
1022 "R_PPC_GOT_TLSLD16_LO", /* name */
1023 FALSE, /* partial_inplace */
1024 0, /* src_mask */
1025 0xffff, /* dst_mask */
1026 FALSE), /* pcrel_offset */
1027
1028 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1029 HOWTO (R_PPC_GOT_TLSLD16_HI,
1030 16, /* rightshift */
1031 1, /* size (0 = byte, 1 = short, 2 = long) */
1032 16, /* bitsize */
1033 FALSE, /* pc_relative */
1034 0, /* bitpos */
1035 complain_overflow_dont, /* complain_on_overflow */
1036 ppc_elf_unhandled_reloc, /* special_function */
1037 "R_PPC_GOT_TLSLD16_HI", /* name */
1038 FALSE, /* partial_inplace */
1039 0, /* src_mask */
1040 0xffff, /* dst_mask */
1041 FALSE), /* pcrel_offset */
1042
1043 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1044 HOWTO (R_PPC_GOT_TLSLD16_HA,
1045 16, /* rightshift */
1046 1, /* size (0 = byte, 1 = short, 2 = long) */
1047 16, /* bitsize */
1048 FALSE, /* pc_relative */
1049 0, /* bitpos */
1050 complain_overflow_dont, /* complain_on_overflow */
1051 ppc_elf_unhandled_reloc, /* special_function */
1052 "R_PPC_GOT_TLSLD16_HA", /* name */
1053 FALSE, /* partial_inplace */
1054 0, /* src_mask */
1055 0xffff, /* dst_mask */
1056 FALSE), /* pcrel_offset */
1057
1058 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1059 the offset to the entry. */
1060 HOWTO (R_PPC_GOT_DTPREL16,
1061 0, /* rightshift */
1062 1, /* size (0 = byte, 1 = short, 2 = long) */
1063 16, /* bitsize */
1064 FALSE, /* pc_relative */
1065 0, /* bitpos */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 ppc_elf_unhandled_reloc, /* special_function */
1068 "R_PPC_GOT_DTPREL16", /* name */
1069 FALSE, /* partial_inplace */
1070 0, /* src_mask */
1071 0xffff, /* dst_mask */
1072 FALSE), /* pcrel_offset */
1073
1074 /* Like GOT_DTPREL16, but no overflow. */
1075 HOWTO (R_PPC_GOT_DTPREL16_LO,
1076 0, /* rightshift */
1077 1, /* size (0 = byte, 1 = short, 2 = long) */
1078 16, /* bitsize */
1079 FALSE, /* pc_relative */
1080 0, /* bitpos */
1081 complain_overflow_dont, /* complain_on_overflow */
1082 ppc_elf_unhandled_reloc, /* special_function */
1083 "R_PPC_GOT_DTPREL16_LO", /* name */
1084 FALSE, /* partial_inplace */
1085 0, /* src_mask */
1086 0xffff, /* dst_mask */
1087 FALSE), /* pcrel_offset */
1088
1089 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1090 HOWTO (R_PPC_GOT_DTPREL16_HI,
1091 16, /* rightshift */
1092 1, /* size (0 = byte, 1 = short, 2 = long) */
1093 16, /* bitsize */
1094 FALSE, /* pc_relative */
1095 0, /* bitpos */
1096 complain_overflow_dont, /* complain_on_overflow */
1097 ppc_elf_unhandled_reloc, /* special_function */
1098 "R_PPC_GOT_DTPREL16_HI", /* name */
1099 FALSE, /* partial_inplace */
1100 0, /* src_mask */
1101 0xffff, /* dst_mask */
1102 FALSE), /* pcrel_offset */
1103
1104 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1105 HOWTO (R_PPC_GOT_DTPREL16_HA,
1106 16, /* rightshift */
1107 1, /* size (0 = byte, 1 = short, 2 = long) */
1108 16, /* bitsize */
1109 FALSE, /* pc_relative */
1110 0, /* bitpos */
1111 complain_overflow_dont, /* complain_on_overflow */
1112 ppc_elf_unhandled_reloc, /* special_function */
1113 "R_PPC_GOT_DTPREL16_HA", /* name */
1114 FALSE, /* partial_inplace */
1115 0, /* src_mask */
1116 0xffff, /* dst_mask */
1117 FALSE), /* pcrel_offset */
1118
1119 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1120 offset to the entry. */
1121 HOWTO (R_PPC_GOT_TPREL16,
1122 0, /* rightshift */
1123 1, /* size (0 = byte, 1 = short, 2 = long) */
1124 16, /* bitsize */
1125 FALSE, /* pc_relative */
1126 0, /* bitpos */
1127 complain_overflow_signed, /* complain_on_overflow */
1128 ppc_elf_unhandled_reloc, /* special_function */
1129 "R_PPC_GOT_TPREL16", /* name */
1130 FALSE, /* partial_inplace */
1131 0, /* src_mask */
1132 0xffff, /* dst_mask */
1133 FALSE), /* pcrel_offset */
1134
1135 /* Like GOT_TPREL16, but no overflow. */
1136 HOWTO (R_PPC_GOT_TPREL16_LO,
1137 0, /* rightshift */
1138 1, /* size (0 = byte, 1 = short, 2 = long) */
1139 16, /* bitsize */
1140 FALSE, /* pc_relative */
1141 0, /* bitpos */
1142 complain_overflow_dont, /* complain_on_overflow */
1143 ppc_elf_unhandled_reloc, /* special_function */
1144 "R_PPC_GOT_TPREL16_LO", /* name */
1145 FALSE, /* partial_inplace */
1146 0, /* src_mask */
1147 0xffff, /* dst_mask */
1148 FALSE), /* pcrel_offset */
1149
1150 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1151 HOWTO (R_PPC_GOT_TPREL16_HI,
1152 16, /* rightshift */
1153 1, /* size (0 = byte, 1 = short, 2 = long) */
1154 16, /* bitsize */
1155 FALSE, /* pc_relative */
1156 0, /* bitpos */
1157 complain_overflow_dont, /* complain_on_overflow */
1158 ppc_elf_unhandled_reloc, /* special_function */
1159 "R_PPC_GOT_TPREL16_HI", /* name */
1160 FALSE, /* partial_inplace */
1161 0, /* src_mask */
1162 0xffff, /* dst_mask */
1163 FALSE), /* pcrel_offset */
1164
1165 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1166 HOWTO (R_PPC_GOT_TPREL16_HA,
1167 16, /* rightshift */
1168 1, /* size (0 = byte, 1 = short, 2 = long) */
1169 16, /* bitsize */
1170 FALSE, /* pc_relative */
1171 0, /* bitpos */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 ppc_elf_unhandled_reloc, /* special_function */
1174 "R_PPC_GOT_TPREL16_HA", /* name */
1175 FALSE, /* partial_inplace */
1176 0, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1179
1180 /* The remaining relocs are from the Embedded ELF ABI, and are not
1181 in the SVR4 ELF ABI. */
1182
1183 /* 32 bit value resulting from the addend minus the symbol. */
1184 HOWTO (R_PPC_EMB_NADDR32, /* type */
1185 0, /* rightshift */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1187 32, /* bitsize */
1188 FALSE, /* pc_relative */
1189 0, /* bitpos */
1190 complain_overflow_bitfield, /* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 "R_PPC_EMB_NADDR32", /* name */
1193 FALSE, /* partial_inplace */
1194 0, /* src_mask */
1195 0xffffffff, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1197
1198 /* 16 bit value resulting from the addend minus the symbol. */
1199 HOWTO (R_PPC_EMB_NADDR16, /* type */
1200 0, /* rightshift */
1201 1, /* size (0 = byte, 1 = short, 2 = long) */
1202 16, /* bitsize */
1203 FALSE, /* pc_relative */
1204 0, /* bitpos */
1205 complain_overflow_bitfield, /* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 "R_PPC_EMB_NADDR16", /* name */
1208 FALSE, /* partial_inplace */
1209 0, /* src_mask */
1210 0xffff, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1212
1213 /* 16 bit value resulting from the addend minus the symbol. */
1214 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1215 0, /* rightshift */
1216 1, /* size (0 = byte, 1 = short, 2 = long) */
1217 16, /* bitsize */
1218 FALSE, /* pc_relative */
1219 0, /* bitpos */
1220 complain_overflow_dont,/* complain_on_overflow */
1221 bfd_elf_generic_reloc, /* special_function */
1222 "R_PPC_EMB_ADDR16_LO", /* name */
1223 FALSE, /* partial_inplace */
1224 0, /* src_mask */
1225 0xffff, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1227
1228 /* The high order 16 bits of the addend minus the symbol. */
1229 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1230 16, /* rightshift */
1231 1, /* size (0 = byte, 1 = short, 2 = long) */
1232 16, /* bitsize */
1233 FALSE, /* pc_relative */
1234 0, /* bitpos */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 bfd_elf_generic_reloc, /* special_function */
1237 "R_PPC_EMB_NADDR16_HI", /* name */
1238 FALSE, /* partial_inplace */
1239 0, /* src_mask */
1240 0xffff, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1242
1243 /* The high order 16 bits of the result of the addend minus the address,
1244 plus 1 if the contents of the low 16 bits, treated as a signed number,
1245 is negative. */
1246 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1247 16, /* rightshift */
1248 1, /* size (0 = byte, 1 = short, 2 = long) */
1249 16, /* bitsize */
1250 FALSE, /* pc_relative */
1251 0, /* bitpos */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 ppc_elf_addr16_ha_reloc, /* special_function */
1254 "R_PPC_EMB_NADDR16_HA", /* name */
1255 FALSE, /* partial_inplace */
1256 0, /* src_mask */
1257 0xffff, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1259
1260 /* 16 bit value resulting from allocating a 4 byte word to hold an
1261 address in the .sdata section, and returning the offset from
1262 _SDA_BASE_ for that relocation. */
1263 HOWTO (R_PPC_EMB_SDAI16, /* type */
1264 0, /* rightshift */
1265 1, /* size (0 = byte, 1 = short, 2 = long) */
1266 16, /* bitsize */
1267 FALSE, /* pc_relative */
1268 0, /* bitpos */
1269 complain_overflow_bitfield, /* complain_on_overflow */
1270 bfd_elf_generic_reloc, /* special_function */
1271 "R_PPC_EMB_SDAI16", /* name */
1272 FALSE, /* partial_inplace */
1273 0, /* src_mask */
1274 0xffff, /* dst_mask */
1275 FALSE), /* pcrel_offset */
1276
1277 /* 16 bit value resulting from allocating a 4 byte word to hold an
1278 address in the .sdata2 section, and returning the offset from
1279 _SDA2_BASE_ for that relocation. */
1280 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1281 0, /* rightshift */
1282 1, /* size (0 = byte, 1 = short, 2 = long) */
1283 16, /* bitsize */
1284 FALSE, /* pc_relative */
1285 0, /* bitpos */
1286 complain_overflow_bitfield, /* complain_on_overflow */
1287 bfd_elf_generic_reloc, /* special_function */
1288 "R_PPC_EMB_SDA2I16", /* name */
1289 FALSE, /* partial_inplace */
1290 0, /* src_mask */
1291 0xffff, /* dst_mask */
1292 FALSE), /* pcrel_offset */
1293
1294 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1295 small data items. */
1296 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1297 0, /* rightshift */
1298 1, /* size (0 = byte, 1 = short, 2 = long) */
1299 16, /* bitsize */
1300 FALSE, /* pc_relative */
1301 0, /* bitpos */
1302 complain_overflow_signed, /* complain_on_overflow */
1303 bfd_elf_generic_reloc, /* special_function */
1304 "R_PPC_EMB_SDA2REL", /* name */
1305 FALSE, /* partial_inplace */
1306 0, /* src_mask */
1307 0xffff, /* dst_mask */
1308 FALSE), /* pcrel_offset */
1309
1310 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1311 signed offset from the appropriate base, and filling in the register
1312 field with the appropriate register (0, 2, or 13). */
1313 HOWTO (R_PPC_EMB_SDA21, /* type */
1314 0, /* rightshift */
1315 2, /* size (0 = byte, 1 = short, 2 = long) */
1316 16, /* bitsize */
1317 FALSE, /* pc_relative */
1318 0, /* bitpos */
1319 complain_overflow_signed, /* complain_on_overflow */
1320 bfd_elf_generic_reloc, /* special_function */
1321 "R_PPC_EMB_SDA21", /* name */
1322 FALSE, /* partial_inplace */
1323 0, /* src_mask */
1324 0xffff, /* dst_mask */
1325 FALSE), /* pcrel_offset */
1326
1327 /* Relocation not handled: R_PPC_EMB_MRKREF */
1328 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1329 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1330 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1331 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1332 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1333
1334 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1335 in the 16 bit signed offset from the appropriate base, and filling in the
1336 register field with the appropriate register (0, 2, or 13). */
1337 HOWTO (R_PPC_EMB_RELSDA, /* type */
1338 0, /* rightshift */
1339 1, /* size (0 = byte, 1 = short, 2 = long) */
1340 16, /* bitsize */
1341 TRUE, /* pc_relative */
1342 0, /* bitpos */
1343 complain_overflow_signed, /* complain_on_overflow */
1344 bfd_elf_generic_reloc, /* special_function */
1345 "R_PPC_EMB_RELSDA", /* name */
1346 FALSE, /* partial_inplace */
1347 0, /* src_mask */
1348 0xffff, /* dst_mask */
1349 FALSE), /* pcrel_offset */
1350
1351 /* A 16 bit relative relocation. */
1352 HOWTO (R_PPC_REL16, /* type */
1353 0, /* rightshift */
1354 1, /* size (0 = byte, 1 = short, 2 = long) */
1355 16, /* bitsize */
1356 TRUE, /* pc_relative */
1357 0, /* bitpos */
1358 complain_overflow_bitfield, /* complain_on_overflow */
1359 bfd_elf_generic_reloc, /* special_function */
1360 "R_PPC_REL16", /* name */
1361 FALSE, /* partial_inplace */
1362 0, /* src_mask */
1363 0xffff, /* dst_mask */
1364 TRUE), /* pcrel_offset */
1365
1366 /* A 16 bit relative relocation without overflow. */
1367 HOWTO (R_PPC_REL16_LO, /* type */
1368 0, /* rightshift */
1369 1, /* size (0 = byte, 1 = short, 2 = long) */
1370 16, /* bitsize */
1371 TRUE, /* pc_relative */
1372 0, /* bitpos */
1373 complain_overflow_dont,/* complain_on_overflow */
1374 bfd_elf_generic_reloc, /* special_function */
1375 "R_PPC_REL16_LO", /* name */
1376 FALSE, /* partial_inplace */
1377 0, /* src_mask */
1378 0xffff, /* dst_mask */
1379 TRUE), /* pcrel_offset */
1380
1381 /* The high order 16 bits of a relative address. */
1382 HOWTO (R_PPC_REL16_HI, /* type */
1383 16, /* rightshift */
1384 1, /* size (0 = byte, 1 = short, 2 = long) */
1385 16, /* bitsize */
1386 TRUE, /* pc_relative */
1387 0, /* bitpos */
1388 complain_overflow_dont, /* complain_on_overflow */
1389 bfd_elf_generic_reloc, /* special_function */
1390 "R_PPC_REL16_HI", /* name */
1391 FALSE, /* partial_inplace */
1392 0, /* src_mask */
1393 0xffff, /* dst_mask */
1394 TRUE), /* pcrel_offset */
1395
1396 /* The high order 16 bits of a relative address, plus 1 if the contents of
1397 the low 16 bits, treated as a signed number, is negative. */
1398 HOWTO (R_PPC_REL16_HA, /* type */
1399 16, /* rightshift */
1400 1, /* size (0 = byte, 1 = short, 2 = long) */
1401 16, /* bitsize */
1402 TRUE, /* pc_relative */
1403 0, /* bitpos */
1404 complain_overflow_dont, /* complain_on_overflow */
1405 ppc_elf_addr16_ha_reloc, /* special_function */
1406 "R_PPC_REL16_HA", /* name */
1407 FALSE, /* partial_inplace */
1408 0, /* src_mask */
1409 0xffff, /* dst_mask */
1410 TRUE), /* pcrel_offset */
1411
1412 /* GNU extension to record C++ vtable hierarchy. */
1413 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1414 0, /* rightshift */
1415 0, /* size (0 = byte, 1 = short, 2 = long) */
1416 0, /* bitsize */
1417 FALSE, /* pc_relative */
1418 0, /* bitpos */
1419 complain_overflow_dont, /* complain_on_overflow */
1420 NULL, /* special_function */
1421 "R_PPC_GNU_VTINHERIT", /* name */
1422 FALSE, /* partial_inplace */
1423 0, /* src_mask */
1424 0, /* dst_mask */
1425 FALSE), /* pcrel_offset */
1426
1427 /* GNU extension to record C++ vtable member usage. */
1428 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1429 0, /* rightshift */
1430 0, /* size (0 = byte, 1 = short, 2 = long) */
1431 0, /* bitsize */
1432 FALSE, /* pc_relative */
1433 0, /* bitpos */
1434 complain_overflow_dont, /* complain_on_overflow */
1435 NULL, /* special_function */
1436 "R_PPC_GNU_VTENTRY", /* name */
1437 FALSE, /* partial_inplace */
1438 0, /* src_mask */
1439 0, /* dst_mask */
1440 FALSE), /* pcrel_offset */
1441
1442 /* Phony reloc to handle AIX style TOC entries. */
1443 HOWTO (R_PPC_TOC16, /* type */
1444 0, /* rightshift */
1445 1, /* size (0 = byte, 1 = short, 2 = long) */
1446 16, /* bitsize */
1447 FALSE, /* pc_relative */
1448 0, /* bitpos */
1449 complain_overflow_signed, /* complain_on_overflow */
1450 bfd_elf_generic_reloc, /* special_function */
1451 "R_PPC_TOC16", /* name */
1452 FALSE, /* partial_inplace */
1453 0, /* src_mask */
1454 0xffff, /* dst_mask */
1455 FALSE), /* pcrel_offset */
1456 };
1457 \f
1458 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1459
1460 static void
1461 ppc_elf_howto_init (void)
1462 {
1463 unsigned int i, type;
1464
1465 for (i = 0;
1466 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1467 i++)
1468 {
1469 type = ppc_elf_howto_raw[i].type;
1470 if (type >= (sizeof (ppc_elf_howto_table)
1471 / sizeof (ppc_elf_howto_table[0])))
1472 abort ();
1473 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1474 }
1475 }
1476
1477 static reloc_howto_type *
1478 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1479 bfd_reloc_code_real_type code)
1480 {
1481 enum elf_ppc_reloc_type r;
1482
1483 /* Initialize howto table if not already done. */
1484 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1485 ppc_elf_howto_init ();
1486
1487 switch (code)
1488 {
1489 default:
1490 return NULL;
1491
1492 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1493 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1494 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1495 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1496 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1497 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1498 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1499 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1500 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1501 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1502 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1503 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1504 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1505 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1506 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1507 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1508 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1509 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1510 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1511 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1512 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1513 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1514 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1515 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1516 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1517 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1518 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1519 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1520 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1521 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1522 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1523 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1524 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1525 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1526 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1527 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1528 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1529 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1530 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1531 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1532 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1533 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1534 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1535 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1536 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1537 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1538 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1541 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1542 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1545 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1546 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1549 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1550 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1553 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1554 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1555 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1558 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1559 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1560 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1561 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1562 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1563 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1564 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1565 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1566 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1567 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1568 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1569 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1570 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1571 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1572 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1573 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1574 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1575 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1576 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1577 }
1578
1579 return ppc_elf_howto_table[r];
1580 };
1581
1582 static reloc_howto_type *
1583 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1584 const char *r_name)
1585 {
1586 unsigned int i;
1587
1588 for (i = 0;
1589 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1590 i++)
1591 if (ppc_elf_howto_raw[i].name != NULL
1592 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1593 return &ppc_elf_howto_raw[i];
1594
1595 return NULL;
1596 }
1597
1598 /* Set the howto pointer for a PowerPC ELF reloc. */
1599
1600 static void
1601 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1602 arelent *cache_ptr,
1603 Elf_Internal_Rela *dst)
1604 {
1605 /* Initialize howto table if not already done. */
1606 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1607 ppc_elf_howto_init ();
1608
1609 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1610 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1611
1612 /* Just because the above assert didn't trigger doesn't mean that
1613 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1614 if (!cache_ptr->howto)
1615 {
1616 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1617 abfd, ELF32_R_TYPE (dst->r_info));
1618 bfd_set_error (bfd_error_bad_value);
1619
1620 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1621 }
1622 }
1623
1624 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1625
1626 static bfd_reloc_status_type
1627 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1628 arelent *reloc_entry,
1629 asymbol *symbol,
1630 void *data ATTRIBUTE_UNUSED,
1631 asection *input_section,
1632 bfd *output_bfd,
1633 char **error_message ATTRIBUTE_UNUSED)
1634 {
1635 bfd_vma relocation;
1636
1637 if (output_bfd != NULL)
1638 {
1639 reloc_entry->address += input_section->output_offset;
1640 return bfd_reloc_ok;
1641 }
1642
1643 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1644 return bfd_reloc_outofrange;
1645
1646 if (bfd_is_com_section (symbol->section))
1647 relocation = 0;
1648 else
1649 relocation = symbol->value;
1650
1651 relocation += symbol->section->output_section->vma;
1652 relocation += symbol->section->output_offset;
1653 relocation += reloc_entry->addend;
1654 if (reloc_entry->howto->pc_relative)
1655 relocation -= reloc_entry->address;
1656
1657 reloc_entry->addend += (relocation & 0x8000) << 1;
1658
1659 return bfd_reloc_continue;
1660 }
1661
1662 static bfd_reloc_status_type
1663 ppc_elf_unhandled_reloc (bfd *abfd,
1664 arelent *reloc_entry,
1665 asymbol *symbol,
1666 void *data,
1667 asection *input_section,
1668 bfd *output_bfd,
1669 char **error_message)
1670 {
1671 /* If this is a relocatable link (output_bfd test tells us), just
1672 call the generic function. Any adjustment will be done at final
1673 link time. */
1674 if (output_bfd != NULL)
1675 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1676 input_section, output_bfd, error_message);
1677
1678 if (error_message != NULL)
1679 {
1680 static char buf[60];
1681 sprintf (buf, _("generic linker can't handle %s"),
1682 reloc_entry->howto->name);
1683 *error_message = buf;
1684 }
1685 return bfd_reloc_dangerous;
1686 }
1687 \f
1688 /* Sections created by the linker. */
1689
1690 typedef struct elf_linker_section
1691 {
1692 /* Pointer to the bfd section. */
1693 asection *section;
1694 /* Section name. */
1695 const char *name;
1696 /* Associated bss section name. */
1697 const char *bss_name;
1698 /* Associated symbol name. */
1699 const char *sym_name;
1700 /* Associated symbol. */
1701 struct elf_link_hash_entry *sym;
1702 } elf_linker_section_t;
1703
1704 /* Linked list of allocated pointer entries. This hangs off of the
1705 symbol lists, and provides allows us to return different pointers,
1706 based on different addend's. */
1707
1708 typedef struct elf_linker_section_pointers
1709 {
1710 /* next allocated pointer for this symbol */
1711 struct elf_linker_section_pointers *next;
1712 /* offset of pointer from beginning of section */
1713 bfd_vma offset;
1714 /* addend used */
1715 bfd_vma addend;
1716 /* which linker section this is */
1717 elf_linker_section_t *lsect;
1718 } elf_linker_section_pointers_t;
1719
1720 struct ppc_elf_obj_tdata
1721 {
1722 struct elf_obj_tdata elf;
1723
1724 /* A mapping from local symbols to offsets into the various linker
1725 sections added. This is index by the symbol index. */
1726 elf_linker_section_pointers_t **linker_section_pointers;
1727
1728 /* Flags used to auto-detect plt type. */
1729 unsigned int makes_plt_call : 1;
1730 unsigned int has_rel16 : 1;
1731 };
1732
1733 #define ppc_elf_tdata(bfd) \
1734 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1735
1736 #define elf_local_ptr_offsets(bfd) \
1737 (ppc_elf_tdata (bfd)->linker_section_pointers)
1738
1739 #define is_ppc_elf(bfd) \
1740 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1741 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1742
1743 /* Override the generic function because we store some extras. */
1744
1745 static bfd_boolean
1746 ppc_elf_mkobject (bfd *abfd)
1747 {
1748 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1749 PPC32_ELF_TDATA);
1750 }
1751
1752 /* Fix bad default arch selected for a 32 bit input bfd when the
1753 default is 64 bit. */
1754
1755 static bfd_boolean
1756 ppc_elf_object_p (bfd *abfd)
1757 {
1758 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1759 {
1760 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1761
1762 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1763 {
1764 /* Relies on arch after 64 bit default being 32 bit default. */
1765 abfd->arch_info = abfd->arch_info->next;
1766 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1767 }
1768 }
1769 return TRUE;
1770 }
1771
1772 /* Function to set whether a module needs the -mrelocatable bit set. */
1773
1774 static bfd_boolean
1775 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1776 {
1777 BFD_ASSERT (!elf_flags_init (abfd)
1778 || elf_elfheader (abfd)->e_flags == flags);
1779
1780 elf_elfheader (abfd)->e_flags = flags;
1781 elf_flags_init (abfd) = TRUE;
1782 return TRUE;
1783 }
1784
1785 /* Support for core dump NOTE sections. */
1786
1787 static bfd_boolean
1788 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1789 {
1790 int offset;
1791 unsigned int size;
1792
1793 switch (note->descsz)
1794 {
1795 default:
1796 return FALSE;
1797
1798 case 268: /* Linux/PPC. */
1799 /* pr_cursig */
1800 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1801
1802 /* pr_pid */
1803 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1804
1805 /* pr_reg */
1806 offset = 72;
1807 size = 192;
1808
1809 break;
1810 }
1811
1812 /* Make a ".reg/999" section. */
1813 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1814 size, note->descpos + offset);
1815 }
1816
1817 static bfd_boolean
1818 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1819 {
1820 switch (note->descsz)
1821 {
1822 default:
1823 return FALSE;
1824
1825 case 128: /* Linux/PPC elf_prpsinfo. */
1826 elf_tdata (abfd)->core_program
1827 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1828 elf_tdata (abfd)->core_command
1829 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1830 }
1831
1832 /* Note that for some reason, a spurious space is tacked
1833 onto the end of the args in some (at least one anyway)
1834 implementations, so strip it off if it exists. */
1835
1836 {
1837 char *command = elf_tdata (abfd)->core_command;
1838 int n = strlen (command);
1839
1840 if (0 < n && command[n - 1] == ' ')
1841 command[n - 1] = '\0';
1842 }
1843
1844 return TRUE;
1845 }
1846
1847 static char *
1848 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1849 {
1850 switch (note_type)
1851 {
1852 default:
1853 return NULL;
1854
1855 case NT_PRPSINFO:
1856 {
1857 char data[128];
1858 va_list ap;
1859
1860 va_start (ap, note_type);
1861 memset (data, 0, 32);
1862 strncpy (data + 32, va_arg (ap, const char *), 16);
1863 strncpy (data + 48, va_arg (ap, const char *), 80);
1864 va_end (ap);
1865 return elfcore_write_note (abfd, buf, bufsiz,
1866 "CORE", note_type, data, sizeof (data));
1867 }
1868
1869 case NT_PRSTATUS:
1870 {
1871 char data[268];
1872 va_list ap;
1873 long pid;
1874 int cursig;
1875 const void *greg;
1876
1877 va_start (ap, note_type);
1878 memset (data, 0, 72);
1879 pid = va_arg (ap, long);
1880 bfd_put_32 (abfd, pid, data + 24);
1881 cursig = va_arg (ap, int);
1882 bfd_put_16 (abfd, cursig, data + 12);
1883 greg = va_arg (ap, const void *);
1884 memcpy (data + 72, greg, 192);
1885 memset (data + 264, 0, 4);
1886 va_end (ap);
1887 return elfcore_write_note (abfd, buf, bufsiz,
1888 "CORE", note_type, data, sizeof (data));
1889 }
1890 }
1891 }
1892
1893 /* Return address for Ith PLT stub in section PLT, for relocation REL
1894 or (bfd_vma) -1 if it should not be included. */
1895
1896 static bfd_vma
1897 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1898 const asection *plt ATTRIBUTE_UNUSED,
1899 const arelent *rel)
1900 {
1901 return rel->address;
1902 }
1903
1904 /* Handle a PowerPC specific section when reading an object file. This
1905 is called when bfd_section_from_shdr finds a section with an unknown
1906 type. */
1907
1908 static bfd_boolean
1909 ppc_elf_section_from_shdr (bfd *abfd,
1910 Elf_Internal_Shdr *hdr,
1911 const char *name,
1912 int shindex)
1913 {
1914 asection *newsect;
1915 flagword flags;
1916
1917 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1918 return FALSE;
1919
1920 newsect = hdr->bfd_section;
1921 flags = bfd_get_section_flags (abfd, newsect);
1922 if (hdr->sh_flags & SHF_EXCLUDE)
1923 flags |= SEC_EXCLUDE;
1924
1925 if (hdr->sh_type == SHT_ORDERED)
1926 flags |= SEC_SORT_ENTRIES;
1927
1928 bfd_set_section_flags (abfd, newsect, flags);
1929 return TRUE;
1930 }
1931
1932 /* Set up any other section flags and such that may be necessary. */
1933
1934 static bfd_boolean
1935 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1936 Elf_Internal_Shdr *shdr,
1937 asection *asect)
1938 {
1939 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1940 shdr->sh_flags |= SHF_EXCLUDE;
1941
1942 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1943 shdr->sh_type = SHT_ORDERED;
1944
1945 return TRUE;
1946 }
1947
1948 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1949 need to bump up the number of section headers. */
1950
1951 static int
1952 ppc_elf_additional_program_headers (bfd *abfd,
1953 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1954 {
1955 asection *s;
1956 int ret = 0;
1957
1958 s = bfd_get_section_by_name (abfd, ".sbss2");
1959 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960 ++ret;
1961
1962 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1963 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1964 ++ret;
1965
1966 return ret;
1967 }
1968
1969 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1970 .PPC.EMB.sbss0 a normal section, and not a bss section so
1971 that the linker doesn't crater when trying to make more than
1972 2 sections. */
1973
1974 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1975 {
1976 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1977 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1978 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1979 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1980 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1981 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1982 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1983 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1984 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1985 { NULL, 0, 0, 0, 0 }
1986 };
1987
1988 /* This is what we want for new plt/got. */
1989 static struct bfd_elf_special_section ppc_alt_plt =
1990 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1991
1992 static const struct bfd_elf_special_section *
1993 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1994 {
1995 const struct bfd_elf_special_section *ssect;
1996
1997 /* See if this is one of the special sections. */
1998 if (sec->name == NULL)
1999 return NULL;
2000
2001 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2002 sec->use_rela_p);
2003 if (ssect != NULL)
2004 {
2005 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2006 ssect = &ppc_alt_plt;
2007 return ssect;
2008 }
2009
2010 return _bfd_elf_get_sec_type_attr (abfd, sec);
2011 }
2012 \f
2013 /* Very simple linked list structure for recording apuinfo values. */
2014 typedef struct apuinfo_list
2015 {
2016 struct apuinfo_list *next;
2017 unsigned long value;
2018 }
2019 apuinfo_list;
2020
2021 static apuinfo_list *head;
2022
2023
2024 static void
2025 apuinfo_list_init (void)
2026 {
2027 head = NULL;
2028 }
2029
2030 static void
2031 apuinfo_list_add (unsigned long value)
2032 {
2033 apuinfo_list *entry = head;
2034
2035 while (entry != NULL)
2036 {
2037 if (entry->value == value)
2038 return;
2039 entry = entry->next;
2040 }
2041
2042 entry = bfd_malloc (sizeof (* entry));
2043 if (entry == NULL)
2044 return;
2045
2046 entry->value = value;
2047 entry->next = head;
2048 head = entry;
2049 }
2050
2051 static unsigned
2052 apuinfo_list_length (void)
2053 {
2054 apuinfo_list *entry;
2055 unsigned long count;
2056
2057 for (entry = head, count = 0;
2058 entry;
2059 entry = entry->next)
2060 ++ count;
2061
2062 return count;
2063 }
2064
2065 static inline unsigned long
2066 apuinfo_list_element (unsigned long number)
2067 {
2068 apuinfo_list * entry;
2069
2070 for (entry = head;
2071 entry && number --;
2072 entry = entry->next)
2073 ;
2074
2075 return entry ? entry->value : 0;
2076 }
2077
2078 static void
2079 apuinfo_list_finish (void)
2080 {
2081 apuinfo_list *entry;
2082
2083 for (entry = head; entry;)
2084 {
2085 apuinfo_list *next = entry->next;
2086 free (entry);
2087 entry = next;
2088 }
2089
2090 head = NULL;
2091 }
2092
2093 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2094 #define APUINFO_LABEL "APUinfo"
2095
2096 /* Scan the input BFDs and create a linked list of
2097 the APUinfo values that will need to be emitted. */
2098
2099 static void
2100 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2101 {
2102 bfd *ibfd;
2103 asection *asec;
2104 char *buffer;
2105 unsigned num_input_sections;
2106 bfd_size_type output_section_size;
2107 unsigned i;
2108 unsigned num_entries;
2109 unsigned long offset;
2110 unsigned long length;
2111 const char *error_message = NULL;
2112
2113 if (link_info == NULL)
2114 return;
2115
2116 /* Scan the input bfds, looking for apuinfo sections. */
2117 num_input_sections = 0;
2118 output_section_size = 0;
2119
2120 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2121 {
2122 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2123 if (asec)
2124 {
2125 ++ num_input_sections;
2126 output_section_size += asec->size;
2127 }
2128 }
2129
2130 /* We need at least one input sections
2131 in order to make merging worthwhile. */
2132 if (num_input_sections < 1)
2133 return;
2134
2135 /* Just make sure that the output section exists as well. */
2136 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2137 if (asec == NULL)
2138 return;
2139
2140 /* Allocate a buffer for the contents of the input sections. */
2141 buffer = bfd_malloc (output_section_size);
2142 if (buffer == NULL)
2143 return;
2144
2145 offset = 0;
2146 apuinfo_list_init ();
2147
2148 /* Read in the input sections contents. */
2149 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2150 {
2151 unsigned long datum;
2152 char *ptr;
2153
2154 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2155 if (asec == NULL)
2156 continue;
2157
2158 length = asec->size;
2159 if (length < 24)
2160 {
2161 error_message = _("corrupt or empty %s section in %B");
2162 goto fail;
2163 }
2164
2165 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2166 || (bfd_bread (buffer + offset, length, ibfd) != length))
2167 {
2168 error_message = _("unable to read in %s section from %B");
2169 goto fail;
2170 }
2171
2172 /* Process the contents of the section. */
2173 ptr = buffer + offset;
2174 error_message = _("corrupt %s section in %B");
2175
2176 /* Verify the contents of the header. Note - we have to
2177 extract the values this way in order to allow for a
2178 host whose endian-ness is different from the target. */
2179 datum = bfd_get_32 (ibfd, ptr);
2180 if (datum != sizeof APUINFO_LABEL)
2181 goto fail;
2182
2183 datum = bfd_get_32 (ibfd, ptr + 8);
2184 if (datum != 0x2)
2185 goto fail;
2186
2187 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2188 goto fail;
2189
2190 /* Get the number of bytes used for apuinfo entries. */
2191 datum = bfd_get_32 (ibfd, ptr + 4);
2192 if (datum + 20 != length)
2193 goto fail;
2194
2195 /* Make sure that we do not run off the end of the section. */
2196 if (offset + length > output_section_size)
2197 goto fail;
2198
2199 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2200 for (i = 0; i < datum; i += 4)
2201 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2202
2203 /* Update the offset. */
2204 offset += length;
2205 }
2206
2207 error_message = NULL;
2208
2209 /* Compute the size of the output section. */
2210 num_entries = apuinfo_list_length ();
2211 output_section_size = 20 + num_entries * 4;
2212
2213 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2214
2215 if (! bfd_set_section_size (abfd, asec, output_section_size))
2216 ibfd = abfd,
2217 error_message = _("warning: unable to set size of %s section in %B");
2218
2219 fail:
2220 free (buffer);
2221
2222 if (error_message)
2223 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2224 }
2225
2226 /* Prevent the output section from accumulating the input sections'
2227 contents. We have already stored this in our linked list structure. */
2228
2229 static bfd_boolean
2230 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2231 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2232 asection *asec,
2233 bfd_byte *contents ATTRIBUTE_UNUSED)
2234 {
2235 return (apuinfo_list_length ()
2236 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2237 }
2238
2239 /* Finally we can generate the output section. */
2240
2241 static void
2242 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2243 {
2244 bfd_byte *buffer;
2245 asection *asec;
2246 unsigned i;
2247 unsigned num_entries;
2248 bfd_size_type length;
2249
2250 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2251 if (asec == NULL)
2252 return;
2253
2254 if (apuinfo_list_length () == 0)
2255 return;
2256
2257 length = asec->size;
2258 if (length < 20)
2259 return;
2260
2261 buffer = bfd_malloc (length);
2262 if (buffer == NULL)
2263 {
2264 (*_bfd_error_handler)
2265 (_("failed to allocate space for new APUinfo section."));
2266 return;
2267 }
2268
2269 /* Create the apuinfo header. */
2270 num_entries = apuinfo_list_length ();
2271 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2272 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2273 bfd_put_32 (abfd, 0x2, buffer + 8);
2274 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2275
2276 length = 20;
2277 for (i = 0; i < num_entries; i++)
2278 {
2279 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2280 length += 4;
2281 }
2282
2283 if (length != asec->size)
2284 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2285
2286 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2287 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2288
2289 free (buffer);
2290
2291 apuinfo_list_finish ();
2292 }
2293 \f
2294 /* The following functions are specific to the ELF linker, while
2295 functions above are used generally. They appear in this file more
2296 or less in the order in which they are called. eg.
2297 ppc_elf_check_relocs is called early in the link process,
2298 ppc_elf_finish_dynamic_sections is one of the last functions
2299 called. */
2300
2301 /* The PPC linker needs to keep track of the number of relocs that it
2302 decides to copy as dynamic relocs in check_relocs for each symbol.
2303 This is so that it can later discard them if they are found to be
2304 unnecessary. We store the information in a field extending the
2305 regular ELF linker hash table. */
2306
2307 struct ppc_elf_dyn_relocs
2308 {
2309 struct ppc_elf_dyn_relocs *next;
2310
2311 /* The input section of the reloc. */
2312 asection *sec;
2313
2314 /* Total number of relocs copied for the input section. */
2315 bfd_size_type count;
2316
2317 /* Number of pc-relative relocs copied for the input section. */
2318 bfd_size_type pc_count;
2319 };
2320
2321 /* Track PLT entries needed for a given symbol. We might need more
2322 than one glink entry per symbol. */
2323 struct plt_entry
2324 {
2325 struct plt_entry *next;
2326
2327 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2328 This field stores the offset into .got2 used to initialise the
2329 GOT pointer reg. It will always be at least 32768 (and for
2330 current gcc this is the only offset used). */
2331 bfd_vma addend;
2332
2333 /* The .got2 section. */
2334 asection *sec;
2335
2336 /* PLT refcount or offset. */
2337 union
2338 {
2339 bfd_signed_vma refcount;
2340 bfd_vma offset;
2341 } plt;
2342
2343 /* .glink stub offset. */
2344 bfd_vma glink_offset;
2345 };
2346
2347 /* Of those relocs that might be copied as dynamic relocs, this macro
2348 selects those that must be copied when linking a shared library,
2349 even when the symbol is local. */
2350
2351 #define MUST_BE_DYN_RELOC(RTYPE) \
2352 ((RTYPE) != R_PPC_REL24 \
2353 && (RTYPE) != R_PPC_REL14 \
2354 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2355 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2356 && (RTYPE) != R_PPC_REL32)
2357
2358 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2359 copying dynamic variables from a shared lib into an app's dynbss
2360 section, and instead use a dynamic relocation to point into the
2361 shared lib. */
2362 #define ELIMINATE_COPY_RELOCS 1
2363
2364 /* PPC ELF linker hash entry. */
2365
2366 struct ppc_elf_link_hash_entry
2367 {
2368 struct elf_link_hash_entry elf;
2369
2370 /* If this symbol is used in the linker created sections, the processor
2371 specific backend uses this field to map the field into the offset
2372 from the beginning of the section. */
2373 elf_linker_section_pointers_t *linker_section_pointer;
2374
2375 /* Track dynamic relocs copied for this symbol. */
2376 struct ppc_elf_dyn_relocs *dyn_relocs;
2377
2378 /* Contexts in which symbol is used in the GOT (or TOC).
2379 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2380 corresponding relocs are encountered during check_relocs.
2381 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2382 indicate the corresponding GOT entry type is not needed. */
2383 #define TLS_GD 1 /* GD reloc. */
2384 #define TLS_LD 2 /* LD reloc. */
2385 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2386 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2387 #define TLS_TLS 16 /* Any TLS reloc. */
2388 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2389 char tls_mask;
2390
2391 /* Nonzero if we have seen a small data relocation referring to this
2392 symbol. */
2393 unsigned char has_sda_refs;
2394 };
2395
2396 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2397
2398 /* PPC ELF linker hash table. */
2399
2400 struct ppc_elf_link_hash_table
2401 {
2402 struct elf_link_hash_table elf;
2403
2404 /* Short-cuts to get to dynamic linker sections. */
2405 asection *got;
2406 asection *relgot;
2407 asection *glink;
2408 asection *plt;
2409 asection *relplt;
2410 asection *dynbss;
2411 asection *relbss;
2412 asection *dynsbss;
2413 asection *relsbss;
2414 elf_linker_section_t sdata[2];
2415 asection *sbss;
2416
2417 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2418 asection *srelplt2;
2419
2420 /* The .got.plt section (VxWorks only)*/
2421 asection *sgotplt;
2422
2423 /* Shortcut to .__tls_get_addr. */
2424 struct elf_link_hash_entry *tls_get_addr;
2425
2426 /* The bfd that forced an old-style PLT. */
2427 bfd *old_bfd;
2428
2429 /* TLS local dynamic got entry handling. */
2430 union {
2431 bfd_signed_vma refcount;
2432 bfd_vma offset;
2433 } tlsld_got;
2434
2435 /* Offset of PltResolve function in glink. */
2436 bfd_vma glink_pltresolve;
2437
2438 /* Size of reserved GOT entries. */
2439 unsigned int got_header_size;
2440 /* Non-zero if allocating the header left a gap. */
2441 unsigned int got_gap;
2442
2443 /* The type of PLT we have chosen to use. */
2444 enum ppc_elf_plt_type plt_type;
2445
2446 /* Set if we should emit symbols for stubs. */
2447 unsigned int emit_stub_syms:1;
2448
2449 /* True if the target system is VxWorks. */
2450 unsigned int is_vxworks:1;
2451
2452 /* The size of PLT entries. */
2453 int plt_entry_size;
2454 /* The distance between adjacent PLT slots. */
2455 int plt_slot_size;
2456 /* The size of the first PLT entry. */
2457 int plt_initial_entry_size;
2458
2459 /* Small local sym to section mapping cache. */
2460 struct sym_sec_cache sym_sec;
2461 };
2462
2463 /* Get the PPC ELF linker hash table from a link_info structure. */
2464
2465 #define ppc_elf_hash_table(p) \
2466 ((struct ppc_elf_link_hash_table *) (p)->hash)
2467
2468 /* Create an entry in a PPC ELF linker hash table. */
2469
2470 static struct bfd_hash_entry *
2471 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2472 struct bfd_hash_table *table,
2473 const char *string)
2474 {
2475 /* Allocate the structure if it has not already been allocated by a
2476 subclass. */
2477 if (entry == NULL)
2478 {
2479 entry = bfd_hash_allocate (table,
2480 sizeof (struct ppc_elf_link_hash_entry));
2481 if (entry == NULL)
2482 return entry;
2483 }
2484
2485 /* Call the allocation method of the superclass. */
2486 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2487 if (entry != NULL)
2488 {
2489 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2490 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2491 ppc_elf_hash_entry (entry)->tls_mask = 0;
2492 }
2493
2494 return entry;
2495 }
2496
2497 /* Create a PPC ELF linker hash table. */
2498
2499 static struct bfd_link_hash_table *
2500 ppc_elf_link_hash_table_create (bfd *abfd)
2501 {
2502 struct ppc_elf_link_hash_table *ret;
2503
2504 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2505 if (ret == NULL)
2506 return NULL;
2507
2508 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2509 ppc_elf_link_hash_newfunc,
2510 sizeof (struct ppc_elf_link_hash_entry)))
2511 {
2512 free (ret);
2513 return NULL;
2514 }
2515
2516 ret->elf.init_plt_refcount.refcount = 0;
2517 ret->elf.init_plt_refcount.glist = NULL;
2518 ret->elf.init_plt_offset.offset = 0;
2519 ret->elf.init_plt_offset.glist = NULL;
2520
2521 ret->sdata[0].name = ".sdata";
2522 ret->sdata[0].sym_name = "_SDA_BASE_";
2523 ret->sdata[0].bss_name = ".sbss";
2524
2525 ret->sdata[1].name = ".sdata2";
2526 ret->sdata[1].sym_name = "_SDA2_BASE_";
2527 ret->sdata[1].bss_name = ".sbss2";
2528
2529 ret->plt_entry_size = 12;
2530 ret->plt_slot_size = 8;
2531 ret->plt_initial_entry_size = 72;
2532
2533 return &ret->elf.root;
2534 }
2535
2536 /* Create .got and the related sections. */
2537
2538 static bfd_boolean
2539 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2540 {
2541 struct ppc_elf_link_hash_table *htab;
2542 asection *s;
2543 flagword flags;
2544
2545 if (!_bfd_elf_create_got_section (abfd, info))
2546 return FALSE;
2547
2548 htab = ppc_elf_hash_table (info);
2549 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2550 if (s == NULL)
2551 abort ();
2552
2553 if (htab->is_vxworks)
2554 {
2555 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2556 if (!htab->sgotplt)
2557 abort ();
2558 }
2559 else
2560 {
2561 /* The powerpc .got has a blrl instruction in it. Mark it
2562 executable. */
2563 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2564 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2565 if (!bfd_set_section_flags (abfd, s, flags))
2566 return FALSE;
2567 }
2568
2569 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2570 | SEC_LINKER_CREATED | SEC_READONLY);
2571 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2572 if (!htab->relgot
2573 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2574 return FALSE;
2575
2576 return TRUE;
2577 }
2578
2579 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2580 to output sections (just like _bfd_elf_create_dynamic_sections has
2581 to create .dynbss and .rela.bss). */
2582
2583 static bfd_boolean
2584 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2585 {
2586 struct ppc_elf_link_hash_table *htab;
2587 asection *s;
2588 flagword flags;
2589
2590 htab = ppc_elf_hash_table (info);
2591
2592 if (htab->got == NULL
2593 && !ppc_elf_create_got (abfd, info))
2594 return FALSE;
2595
2596 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2597 return FALSE;
2598
2599 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2600 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2601
2602 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2603 htab->glink = s;
2604 if (s == NULL
2605 || !bfd_set_section_alignment (abfd, s, 4))
2606 return FALSE;
2607
2608 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2609 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2610 SEC_ALLOC | SEC_LINKER_CREATED);
2611 htab->dynsbss = s;
2612 if (s == NULL)
2613 return FALSE;
2614
2615 if (! info->shared)
2616 {
2617 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2618 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2619 htab->relsbss = s;
2620 if (s == NULL
2621 || ! bfd_set_section_alignment (abfd, s, 2))
2622 return FALSE;
2623 }
2624
2625 if (htab->is_vxworks
2626 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2627 return FALSE;
2628
2629 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2630 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2631 if (s == NULL)
2632 abort ();
2633
2634 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2635 if (htab->plt_type == PLT_VXWORKS)
2636 /* The VxWorks PLT is a loaded section with contents. */
2637 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2638 return bfd_set_section_flags (abfd, s, flags);
2639 }
2640
2641 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2642
2643 static void
2644 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2645 struct elf_link_hash_entry *dir,
2646 struct elf_link_hash_entry *ind)
2647 {
2648 struct ppc_elf_link_hash_entry *edir, *eind;
2649
2650 edir = (struct ppc_elf_link_hash_entry *) dir;
2651 eind = (struct ppc_elf_link_hash_entry *) ind;
2652
2653 if (eind->dyn_relocs != NULL)
2654 {
2655 if (edir->dyn_relocs != NULL)
2656 {
2657 struct ppc_elf_dyn_relocs **pp;
2658 struct ppc_elf_dyn_relocs *p;
2659
2660 /* Add reloc counts against the indirect sym to the direct sym
2661 list. Merge any entries against the same section. */
2662 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2663 {
2664 struct ppc_elf_dyn_relocs *q;
2665
2666 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2667 if (q->sec == p->sec)
2668 {
2669 q->pc_count += p->pc_count;
2670 q->count += p->count;
2671 *pp = p->next;
2672 break;
2673 }
2674 if (q == NULL)
2675 pp = &p->next;
2676 }
2677 *pp = edir->dyn_relocs;
2678 }
2679
2680 edir->dyn_relocs = eind->dyn_relocs;
2681 eind->dyn_relocs = NULL;
2682 }
2683
2684 edir->tls_mask |= eind->tls_mask;
2685 edir->has_sda_refs |= eind->has_sda_refs;
2686
2687 /* If called to transfer flags for a weakdef during processing
2688 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2689 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2690 if (!(ELIMINATE_COPY_RELOCS
2691 && eind->elf.root.type != bfd_link_hash_indirect
2692 && edir->elf.dynamic_adjusted))
2693 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2694
2695 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2696 edir->elf.ref_regular |= eind->elf.ref_regular;
2697 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2698 edir->elf.needs_plt |= eind->elf.needs_plt;
2699 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2700
2701 /* If we were called to copy over info for a weak sym, that's all. */
2702 if (eind->elf.root.type != bfd_link_hash_indirect)
2703 return;
2704
2705 /* Copy over the GOT refcount entries that we may have already seen to
2706 the symbol which just became indirect. */
2707 edir->elf.got.refcount += eind->elf.got.refcount;
2708 eind->elf.got.refcount = 0;
2709
2710 /* And plt entries. */
2711 if (eind->elf.plt.plist != NULL)
2712 {
2713 if (edir->elf.plt.plist != NULL)
2714 {
2715 struct plt_entry **entp;
2716 struct plt_entry *ent;
2717
2718 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2719 {
2720 struct plt_entry *dent;
2721
2722 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2723 if (dent->sec == ent->sec && dent->addend == ent->addend)
2724 {
2725 dent->plt.refcount += ent->plt.refcount;
2726 *entp = ent->next;
2727 break;
2728 }
2729 if (dent == NULL)
2730 entp = &ent->next;
2731 }
2732 *entp = edir->elf.plt.plist;
2733 }
2734
2735 edir->elf.plt.plist = eind->elf.plt.plist;
2736 eind->elf.plt.plist = NULL;
2737 }
2738
2739 if (eind->elf.dynindx != -1)
2740 {
2741 if (edir->elf.dynindx != -1)
2742 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2743 edir->elf.dynstr_index);
2744 edir->elf.dynindx = eind->elf.dynindx;
2745 edir->elf.dynstr_index = eind->elf.dynstr_index;
2746 eind->elf.dynindx = -1;
2747 eind->elf.dynstr_index = 0;
2748 }
2749 }
2750
2751 /* Hook called by the linker routine which adds symbols from an object
2752 file. We use it to put .comm items in .sbss, and not .bss. */
2753
2754 static bfd_boolean
2755 ppc_elf_add_symbol_hook (bfd *abfd,
2756 struct bfd_link_info *info,
2757 Elf_Internal_Sym *sym,
2758 const char **namep ATTRIBUTE_UNUSED,
2759 flagword *flagsp ATTRIBUTE_UNUSED,
2760 asection **secp,
2761 bfd_vma *valp)
2762 {
2763 if (sym->st_shndx == SHN_COMMON
2764 && !info->relocatable
2765 && is_ppc_elf (info->output_bfd)
2766 && sym->st_size <= elf_gp_size (abfd))
2767 {
2768 /* Common symbols less than or equal to -G nn bytes are automatically
2769 put into .sbss. */
2770 struct ppc_elf_link_hash_table *htab;
2771
2772 htab = ppc_elf_hash_table (info);
2773 if (htab->sbss == NULL)
2774 {
2775 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2776
2777 if (!htab->elf.dynobj)
2778 htab->elf.dynobj = abfd;
2779
2780 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2781 ".sbss",
2782 flags);
2783 if (htab->sbss == NULL)
2784 return FALSE;
2785 }
2786
2787 *secp = htab->sbss;
2788 *valp = sym->st_size;
2789 }
2790
2791 return TRUE;
2792 }
2793 \f
2794 static bfd_boolean
2795 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2796 elf_linker_section_t *lsect)
2797 {
2798 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2799 TRUE, FALSE, TRUE);
2800 if (lsect->sym == NULL)
2801 return FALSE;
2802 if (lsect->sym->root.type == bfd_link_hash_new)
2803 lsect->sym->non_elf = 0;
2804 lsect->sym->ref_regular = 1;
2805 return TRUE;
2806 }
2807
2808 /* Create a special linker section. */
2809
2810 static bfd_boolean
2811 ppc_elf_create_linker_section (bfd *abfd,
2812 struct bfd_link_info *info,
2813 flagword flags,
2814 elf_linker_section_t *lsect)
2815 {
2816 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2817 asection *s;
2818
2819 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2820 | SEC_LINKER_CREATED);
2821
2822 /* Record the first bfd that needs the special sections. */
2823 if (!htab->elf.dynobj)
2824 htab->elf.dynobj = abfd;
2825
2826 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2827 lsect->name,
2828 flags);
2829 if (s == NULL
2830 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2831 return FALSE;
2832 lsect->section = s;
2833
2834 return create_sdata_sym (htab, lsect);
2835 }
2836
2837 /* Find a linker generated pointer with a given addend and type. */
2838
2839 static elf_linker_section_pointers_t *
2840 elf_find_pointer_linker_section
2841 (elf_linker_section_pointers_t *linker_pointers,
2842 bfd_vma addend,
2843 elf_linker_section_t *lsect)
2844 {
2845 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2846 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2847 return linker_pointers;
2848
2849 return NULL;
2850 }
2851
2852 /* Allocate a pointer to live in a linker created section. */
2853
2854 static bfd_boolean
2855 elf_create_pointer_linker_section (bfd *abfd,
2856 elf_linker_section_t *lsect,
2857 struct elf_link_hash_entry *h,
2858 const Elf_Internal_Rela *rel)
2859 {
2860 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2861 elf_linker_section_pointers_t *linker_section_ptr;
2862 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2863 bfd_size_type amt;
2864
2865 BFD_ASSERT (lsect != NULL);
2866
2867 /* Is this a global symbol? */
2868 if (h != NULL)
2869 {
2870 struct ppc_elf_link_hash_entry *eh;
2871
2872 /* Has this symbol already been allocated? If so, our work is done. */
2873 eh = (struct ppc_elf_link_hash_entry *) h;
2874 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2875 rel->r_addend,
2876 lsect))
2877 return TRUE;
2878
2879 ptr_linker_section_ptr = &eh->linker_section_pointer;
2880 }
2881 else
2882 {
2883 BFD_ASSERT (is_ppc_elf (abfd));
2884
2885 /* Allocation of a pointer to a local symbol. */
2886 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2887
2888 /* Allocate a table to hold the local symbols if first time. */
2889 if (!ptr)
2890 {
2891 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2892
2893 amt = num_symbols;
2894 amt *= sizeof (elf_linker_section_pointers_t *);
2895 ptr = bfd_zalloc (abfd, amt);
2896
2897 if (!ptr)
2898 return FALSE;
2899
2900 elf_local_ptr_offsets (abfd) = ptr;
2901 }
2902
2903 /* Has this symbol already been allocated? If so, our work is done. */
2904 if (elf_find_pointer_linker_section (ptr[r_symndx],
2905 rel->r_addend,
2906 lsect))
2907 return TRUE;
2908
2909 ptr_linker_section_ptr = &ptr[r_symndx];
2910 }
2911
2912 /* Allocate space for a pointer in the linker section, and allocate
2913 a new pointer record from internal memory. */
2914 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2915 amt = sizeof (elf_linker_section_pointers_t);
2916 linker_section_ptr = bfd_alloc (abfd, amt);
2917
2918 if (!linker_section_ptr)
2919 return FALSE;
2920
2921 linker_section_ptr->next = *ptr_linker_section_ptr;
2922 linker_section_ptr->addend = rel->r_addend;
2923 linker_section_ptr->lsect = lsect;
2924 *ptr_linker_section_ptr = linker_section_ptr;
2925
2926 linker_section_ptr->offset = lsect->section->size;
2927 lsect->section->size += 4;
2928
2929 #ifdef DEBUG
2930 fprintf (stderr,
2931 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2932 lsect->name, (long) linker_section_ptr->offset,
2933 (long) lsect->section->size);
2934 #endif
2935
2936 return TRUE;
2937 }
2938
2939 static bfd_boolean
2940 update_local_sym_info (bfd *abfd,
2941 Elf_Internal_Shdr *symtab_hdr,
2942 unsigned long r_symndx,
2943 int tls_type)
2944 {
2945 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2946 char *local_got_tls_masks;
2947
2948 if (local_got_refcounts == NULL)
2949 {
2950 bfd_size_type size = symtab_hdr->sh_info;
2951
2952 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2953 local_got_refcounts = bfd_zalloc (abfd, size);
2954 if (local_got_refcounts == NULL)
2955 return FALSE;
2956 elf_local_got_refcounts (abfd) = local_got_refcounts;
2957 }
2958
2959 local_got_refcounts[r_symndx] += 1;
2960 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2961 local_got_tls_masks[r_symndx] |= tls_type;
2962 return TRUE;
2963 }
2964
2965 static bfd_boolean
2966 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2967 asection *sec, bfd_vma addend)
2968 {
2969 struct plt_entry *ent;
2970
2971 if (addend < 32768)
2972 sec = NULL;
2973 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2974 if (ent->sec == sec && ent->addend == addend)
2975 break;
2976 if (ent == NULL)
2977 {
2978 bfd_size_type amt = sizeof (*ent);
2979 ent = bfd_alloc (abfd, amt);
2980 if (ent == NULL)
2981 return FALSE;
2982 ent->next = h->plt.plist;
2983 ent->sec = sec;
2984 ent->addend = addend;
2985 ent->plt.refcount = 0;
2986 h->plt.plist = ent;
2987 }
2988 ent->plt.refcount += 1;
2989 return TRUE;
2990 }
2991
2992 static struct plt_entry *
2993 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2994 {
2995 struct plt_entry *ent;
2996
2997 if (addend < 32768)
2998 sec = NULL;
2999 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3000 if (ent->sec == sec && ent->addend == addend)
3001 break;
3002 return ent;
3003 }
3004
3005 static void
3006 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3007 {
3008 (*_bfd_error_handler)
3009 (_("%B: relocation %s cannot be used when making a shared object"),
3010 abfd,
3011 ppc_elf_howto_table[r_type]->name);
3012 bfd_set_error (bfd_error_bad_value);
3013 }
3014
3015 /* Look through the relocs for a section during the first phase, and
3016 allocate space in the global offset table or procedure linkage
3017 table. */
3018
3019 static bfd_boolean
3020 ppc_elf_check_relocs (bfd *abfd,
3021 struct bfd_link_info *info,
3022 asection *sec,
3023 const Elf_Internal_Rela *relocs)
3024 {
3025 struct ppc_elf_link_hash_table *htab;
3026 Elf_Internal_Shdr *symtab_hdr;
3027 struct elf_link_hash_entry **sym_hashes;
3028 const Elf_Internal_Rela *rel;
3029 const Elf_Internal_Rela *rel_end;
3030 asection *got2, *sreloc;
3031
3032 if (info->relocatable)
3033 return TRUE;
3034
3035 /* Don't do anything special with non-loaded, non-alloced sections.
3036 In particular, any relocs in such sections should not affect GOT
3037 and PLT reference counting (ie. we don't allow them to create GOT
3038 or PLT entries), there's no possibility or desire to optimize TLS
3039 relocs, and there's not much point in propagating relocs to shared
3040 libs that the dynamic linker won't relocate. */
3041 if ((sec->flags & SEC_ALLOC) == 0)
3042 return TRUE;
3043
3044 #ifdef DEBUG
3045 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3046 sec, abfd);
3047 #endif
3048
3049 BFD_ASSERT (is_ppc_elf (abfd));
3050
3051 /* Initialize howto table if not already done. */
3052 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3053 ppc_elf_howto_init ();
3054
3055 htab = ppc_elf_hash_table (info);
3056 symtab_hdr = &elf_symtab_hdr (abfd);
3057 sym_hashes = elf_sym_hashes (abfd);
3058 got2 = bfd_get_section_by_name (abfd, ".got2");
3059 sreloc = NULL;
3060
3061 rel_end = relocs + sec->reloc_count;
3062 for (rel = relocs; rel < rel_end; rel++)
3063 {
3064 unsigned long r_symndx;
3065 enum elf_ppc_reloc_type r_type;
3066 struct elf_link_hash_entry *h;
3067 int tls_type = 0;
3068
3069 r_symndx = ELF32_R_SYM (rel->r_info);
3070 if (r_symndx < symtab_hdr->sh_info)
3071 h = NULL;
3072 else
3073 {
3074 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3075 while (h->root.type == bfd_link_hash_indirect
3076 || h->root.type == bfd_link_hash_warning)
3077 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3078 }
3079
3080 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3081 This shows up in particular in an R_PPC_ADDR32 in the eabi
3082 startup code. */
3083 if (h != NULL
3084 && htab->got == NULL
3085 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3086 {
3087 if (htab->elf.dynobj == NULL)
3088 htab->elf.dynobj = abfd;
3089 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3090 return FALSE;
3091 BFD_ASSERT (h == htab->elf.hgot);
3092 }
3093
3094 r_type = ELF32_R_TYPE (rel->r_info);
3095 switch (r_type)
3096 {
3097 case R_PPC_GOT_TLSLD16:
3098 case R_PPC_GOT_TLSLD16_LO:
3099 case R_PPC_GOT_TLSLD16_HI:
3100 case R_PPC_GOT_TLSLD16_HA:
3101 tls_type = TLS_TLS | TLS_LD;
3102 goto dogottls;
3103
3104 case R_PPC_GOT_TLSGD16:
3105 case R_PPC_GOT_TLSGD16_LO:
3106 case R_PPC_GOT_TLSGD16_HI:
3107 case R_PPC_GOT_TLSGD16_HA:
3108 tls_type = TLS_TLS | TLS_GD;
3109 goto dogottls;
3110
3111 case R_PPC_GOT_TPREL16:
3112 case R_PPC_GOT_TPREL16_LO:
3113 case R_PPC_GOT_TPREL16_HI:
3114 case R_PPC_GOT_TPREL16_HA:
3115 if (info->shared)
3116 info->flags |= DF_STATIC_TLS;
3117 tls_type = TLS_TLS | TLS_TPREL;
3118 goto dogottls;
3119
3120 case R_PPC_GOT_DTPREL16:
3121 case R_PPC_GOT_DTPREL16_LO:
3122 case R_PPC_GOT_DTPREL16_HI:
3123 case R_PPC_GOT_DTPREL16_HA:
3124 tls_type = TLS_TLS | TLS_DTPREL;
3125 dogottls:
3126 sec->has_tls_reloc = 1;
3127 /* Fall thru */
3128
3129 /* GOT16 relocations */
3130 case R_PPC_GOT16:
3131 case R_PPC_GOT16_LO:
3132 case R_PPC_GOT16_HI:
3133 case R_PPC_GOT16_HA:
3134 /* This symbol requires a global offset table entry. */
3135 if (htab->got == NULL)
3136 {
3137 if (htab->elf.dynobj == NULL)
3138 htab->elf.dynobj = abfd;
3139 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3140 return FALSE;
3141 }
3142 if (h != NULL)
3143 {
3144 h->got.refcount += 1;
3145 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3146 }
3147 else
3148 /* This is a global offset table entry for a local symbol. */
3149 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3150 return FALSE;
3151 break;
3152
3153 /* Indirect .sdata relocation. */
3154 case R_PPC_EMB_SDAI16:
3155 if (info->shared)
3156 {
3157 bad_shared_reloc (abfd, r_type);
3158 return FALSE;
3159 }
3160 if (htab->sdata[0].section == NULL
3161 && !ppc_elf_create_linker_section (abfd, info, 0,
3162 &htab->sdata[0]))
3163 return FALSE;
3164 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3165 h, rel))
3166 return FALSE;
3167 if (h != NULL)
3168 {
3169 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3170 h->non_got_ref = TRUE;
3171 }
3172 break;
3173
3174 /* Indirect .sdata2 relocation. */
3175 case R_PPC_EMB_SDA2I16:
3176 if (info->shared)
3177 {
3178 bad_shared_reloc (abfd, r_type);
3179 return FALSE;
3180 }
3181 if (htab->sdata[1].section == NULL
3182 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3183 &htab->sdata[1]))
3184 return FALSE;
3185 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3186 h, rel))
3187 return FALSE;
3188 if (h != NULL)
3189 {
3190 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3191 h->non_got_ref = TRUE;
3192 }
3193 break;
3194
3195 case R_PPC_SDAREL16:
3196 if (info->shared)
3197 {
3198 bad_shared_reloc (abfd, r_type);
3199 return FALSE;
3200 }
3201 if (htab->sdata[0].sym == NULL
3202 && !create_sdata_sym (htab, &htab->sdata[0]))
3203 return FALSE;
3204 if (h != NULL)
3205 {
3206 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3207 h->non_got_ref = TRUE;
3208 }
3209 break;
3210
3211 case R_PPC_EMB_SDA2REL:
3212 if (info->shared)
3213 {
3214 bad_shared_reloc (abfd, r_type);
3215 return FALSE;
3216 }
3217 if (htab->sdata[1].sym == NULL
3218 && !create_sdata_sym (htab, &htab->sdata[1]))
3219 return FALSE;
3220 if (h != NULL)
3221 {
3222 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3223 h->non_got_ref = TRUE;
3224 }
3225 break;
3226
3227 case R_PPC_EMB_SDA21:
3228 case R_PPC_EMB_RELSDA:
3229 if (info->shared)
3230 {
3231 bad_shared_reloc (abfd, r_type);
3232 return FALSE;
3233 }
3234 if (htab->sdata[0].sym == NULL
3235 && !create_sdata_sym (htab, &htab->sdata[0]))
3236 return FALSE;
3237 if (htab->sdata[1].sym == NULL
3238 && !create_sdata_sym (htab, &htab->sdata[1]))
3239 return FALSE;
3240 if (h != NULL)
3241 {
3242 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3243 h->non_got_ref = TRUE;
3244 }
3245 break;
3246
3247 case R_PPC_EMB_NADDR32:
3248 case R_PPC_EMB_NADDR16:
3249 case R_PPC_EMB_NADDR16_LO:
3250 case R_PPC_EMB_NADDR16_HI:
3251 case R_PPC_EMB_NADDR16_HA:
3252 if (info->shared)
3253 {
3254 bad_shared_reloc (abfd, r_type);
3255 return FALSE;
3256 }
3257 if (h != NULL)
3258 h->non_got_ref = TRUE;
3259 break;
3260
3261 case R_PPC_PLT32:
3262 case R_PPC_PLTREL24:
3263 case R_PPC_PLTREL32:
3264 case R_PPC_PLT16_LO:
3265 case R_PPC_PLT16_HI:
3266 case R_PPC_PLT16_HA:
3267 #ifdef DEBUG
3268 fprintf (stderr, "Reloc requires a PLT entry\n");
3269 #endif
3270 /* This symbol requires a procedure linkage table entry. We
3271 actually build the entry in finish_dynamic_symbol,
3272 because this might be a case of linking PIC code without
3273 linking in any dynamic objects, in which case we don't
3274 need to generate a procedure linkage table after all. */
3275
3276 if (h == NULL)
3277 {
3278 /* It does not make sense to have a procedure linkage
3279 table entry for a local symbol. */
3280 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3281 "local symbol"),
3282 abfd,
3283 sec,
3284 (long) rel->r_offset,
3285 ppc_elf_howto_table[r_type]->name);
3286 bfd_set_error (bfd_error_bad_value);
3287 return FALSE;
3288 }
3289 else
3290 {
3291 bfd_vma addend = 0;
3292
3293 if (r_type == R_PPC_PLTREL24)
3294 {
3295 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3296 addend = rel->r_addend;
3297 }
3298 h->needs_plt = 1;
3299 if (!update_plt_info (abfd, h, got2, addend))
3300 return FALSE;
3301 }
3302 break;
3303
3304 /* The following relocations don't need to propagate the
3305 relocation if linking a shared object since they are
3306 section relative. */
3307 case R_PPC_SECTOFF:
3308 case R_PPC_SECTOFF_LO:
3309 case R_PPC_SECTOFF_HI:
3310 case R_PPC_SECTOFF_HA:
3311 case R_PPC_DTPREL16:
3312 case R_PPC_DTPREL16_LO:
3313 case R_PPC_DTPREL16_HI:
3314 case R_PPC_DTPREL16_HA:
3315 case R_PPC_TOC16:
3316 break;
3317
3318 case R_PPC_REL16:
3319 case R_PPC_REL16_LO:
3320 case R_PPC_REL16_HI:
3321 case R_PPC_REL16_HA:
3322 ppc_elf_tdata (abfd)->has_rel16 = 1;
3323 break;
3324
3325 /* These are just markers. */
3326 case R_PPC_TLS:
3327 case R_PPC_EMB_MRKREF:
3328 case R_PPC_NONE:
3329 case R_PPC_max:
3330 break;
3331
3332 /* These should only appear in dynamic objects. */
3333 case R_PPC_COPY:
3334 case R_PPC_GLOB_DAT:
3335 case R_PPC_JMP_SLOT:
3336 case R_PPC_RELATIVE:
3337 break;
3338
3339 /* These aren't handled yet. We'll report an error later. */
3340 case R_PPC_ADDR30:
3341 case R_PPC_EMB_RELSEC16:
3342 case R_PPC_EMB_RELST_LO:
3343 case R_PPC_EMB_RELST_HI:
3344 case R_PPC_EMB_RELST_HA:
3345 case R_PPC_EMB_BIT_FLD:
3346 break;
3347
3348 /* This refers only to functions defined in the shared library. */
3349 case R_PPC_LOCAL24PC:
3350 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3351 {
3352 htab->plt_type = PLT_OLD;
3353 htab->old_bfd = abfd;
3354 }
3355 break;
3356
3357 /* This relocation describes the C++ object vtable hierarchy.
3358 Reconstruct it for later use during GC. */
3359 case R_PPC_GNU_VTINHERIT:
3360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3361 return FALSE;
3362 break;
3363
3364 /* This relocation describes which C++ vtable entries are actually
3365 used. Record for later use during GC. */
3366 case R_PPC_GNU_VTENTRY:
3367 BFD_ASSERT (h != NULL);
3368 if (h != NULL
3369 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3370 return FALSE;
3371 break;
3372
3373 /* We shouldn't really be seeing these. */
3374 case R_PPC_TPREL32:
3375 if (info->shared)
3376 info->flags |= DF_STATIC_TLS;
3377 goto dodyn;
3378
3379 /* Nor these. */
3380 case R_PPC_DTPMOD32:
3381 case R_PPC_DTPREL32:
3382 goto dodyn;
3383
3384 case R_PPC_TPREL16:
3385 case R_PPC_TPREL16_LO:
3386 case R_PPC_TPREL16_HI:
3387 case R_PPC_TPREL16_HA:
3388 if (info->shared)
3389 info->flags |= DF_STATIC_TLS;
3390 goto dodyn;
3391
3392 case R_PPC_ADDR32:
3393 case R_PPC_ADDR16:
3394 case R_PPC_ADDR16_LO:
3395 case R_PPC_ADDR16_HI:
3396 case R_PPC_ADDR16_HA:
3397 case R_PPC_UADDR32:
3398 case R_PPC_UADDR16:
3399 if (h != NULL && !info->shared)
3400 {
3401 /* We may need a plt entry if the symbol turns out to be
3402 a function defined in a dynamic object. */
3403 if (!update_plt_info (abfd, h, NULL, 0))
3404 return FALSE;
3405
3406 /* We may need a copy reloc too. */
3407 h->non_got_ref = 1;
3408 h->pointer_equality_needed = 1;
3409 }
3410 goto dodyn;
3411
3412 case R_PPC_REL32:
3413 if (h == NULL
3414 && got2 != NULL
3415 && (sec->flags & SEC_CODE) != 0
3416 && (info->shared || info->pie)
3417 && htab->plt_type == PLT_UNSET)
3418 {
3419 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3420 the start of a function, which assembles to a REL32
3421 reference to .got2. If we detect one of these, then
3422 force the old PLT layout because the linker cannot
3423 reliably deduce the GOT pointer value needed for
3424 PLT call stubs. */
3425 asection *s;
3426
3427 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3428 r_symndx);
3429 if (s == got2)
3430 {
3431 htab->plt_type = PLT_OLD;
3432 htab->old_bfd = abfd;
3433 }
3434 }
3435 if (h == NULL || h == htab->elf.hgot)
3436 break;
3437 goto dodyn1;
3438
3439 case R_PPC_REL24:
3440 case R_PPC_REL14:
3441 case R_PPC_REL14_BRTAKEN:
3442 case R_PPC_REL14_BRNTAKEN:
3443 if (h == NULL)
3444 break;
3445 if (h == htab->elf.hgot)
3446 {
3447 if (htab->plt_type == PLT_UNSET)
3448 {
3449 htab->plt_type = PLT_OLD;
3450 htab->old_bfd = abfd;
3451 }
3452 break;
3453 }
3454 /* fall through */
3455
3456 case R_PPC_ADDR24:
3457 case R_PPC_ADDR14:
3458 case R_PPC_ADDR14_BRTAKEN:
3459 case R_PPC_ADDR14_BRNTAKEN:
3460 dodyn1:
3461 if (h != NULL && !info->shared)
3462 {
3463 /* We may need a plt entry if the symbol turns out to be
3464 a function defined in a dynamic object. */
3465 if (!update_plt_info (abfd, h, NULL, 0))
3466 return FALSE;
3467
3468 /* We may need a copy reloc too. */
3469 h->non_got_ref = 1;
3470 }
3471
3472 dodyn:
3473 /* If we are creating a shared library, and this is a reloc
3474 against a global symbol, or a non PC relative reloc
3475 against a local symbol, then we need to copy the reloc
3476 into the shared library. However, if we are linking with
3477 -Bsymbolic, we do not need to copy a reloc against a
3478 global symbol which is defined in an object we are
3479 including in the link (i.e., DEF_REGULAR is set). At
3480 this point we have not seen all the input files, so it is
3481 possible that DEF_REGULAR is not set now but will be set
3482 later (it is never cleared). In case of a weak definition,
3483 DEF_REGULAR may be cleared later by a strong definition in
3484 a shared library. We account for that possibility below by
3485 storing information in the dyn_relocs field of the hash
3486 table entry. A similar situation occurs when creating
3487 shared libraries and symbol visibility changes render the
3488 symbol local.
3489
3490 If on the other hand, we are creating an executable, we
3491 may need to keep relocations for symbols satisfied by a
3492 dynamic library if we manage to avoid copy relocs for the
3493 symbol. */
3494 if ((info->shared
3495 && (MUST_BE_DYN_RELOC (r_type)
3496 || (h != NULL
3497 && (! info->symbolic
3498 || h->root.type == bfd_link_hash_defweak
3499 || !h->def_regular))))
3500 || (ELIMINATE_COPY_RELOCS
3501 && !info->shared
3502 && h != NULL
3503 && (h->root.type == bfd_link_hash_defweak
3504 || !h->def_regular)))
3505 {
3506 struct ppc_elf_dyn_relocs *p;
3507 struct ppc_elf_dyn_relocs **head;
3508
3509 #ifdef DEBUG
3510 fprintf (stderr,
3511 "ppc_elf_check_relocs needs to "
3512 "create relocation for %s\n",
3513 (h && h->root.root.string
3514 ? h->root.root.string : "<unknown>"));
3515 #endif
3516 if (sreloc == NULL)
3517 {
3518 const char *name;
3519
3520 name = (bfd_elf_string_from_elf_section
3521 (abfd,
3522 elf_elfheader (abfd)->e_shstrndx,
3523 elf_section_data (sec)->rel_hdr.sh_name));
3524 if (name == NULL)
3525 return FALSE;
3526
3527 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3528 && strcmp (bfd_get_section_name (abfd, sec),
3529 name + 5) == 0);
3530
3531 if (htab->elf.dynobj == NULL)
3532 htab->elf.dynobj = abfd;
3533 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3534 if (sreloc == NULL)
3535 {
3536 flagword flags;
3537
3538 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3539 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3540 | SEC_ALLOC | SEC_LOAD);
3541 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3542 name,
3543 flags);
3544 if (sreloc == NULL
3545 || ! bfd_set_section_alignment (htab->elf.dynobj,
3546 sreloc, 2))
3547 return FALSE;
3548 }
3549 elf_section_data (sec)->sreloc = sreloc;
3550 }
3551
3552 /* If this is a global symbol, we count the number of
3553 relocations we need for this symbol. */
3554 if (h != NULL)
3555 {
3556 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3557 }
3558 else
3559 {
3560 /* Track dynamic relocs needed for local syms too.
3561 We really need local syms available to do this
3562 easily. Oh well. */
3563
3564 asection *s;
3565 void *vpp;
3566
3567 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3568 sec, r_symndx);
3569 if (s == NULL)
3570 return FALSE;
3571
3572 vpp = &elf_section_data (s)->local_dynrel;
3573 head = (struct ppc_elf_dyn_relocs **) vpp;
3574 }
3575
3576 p = *head;
3577 if (p == NULL || p->sec != sec)
3578 {
3579 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3580 if (p == NULL)
3581 return FALSE;
3582 p->next = *head;
3583 *head = p;
3584 p->sec = sec;
3585 p->count = 0;
3586 p->pc_count = 0;
3587 }
3588
3589 p->count += 1;
3590 if (!MUST_BE_DYN_RELOC (r_type))
3591 p->pc_count += 1;
3592 }
3593
3594 break;
3595 }
3596 }
3597
3598 return TRUE;
3599 }
3600 \f
3601
3602 /* Merge object attributes from IBFD into OBFD. Raise an error if
3603 there are conflicting attributes. */
3604 static bfd_boolean
3605 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3606 {
3607 obj_attribute *in_attr, *in_attrs;
3608 obj_attribute *out_attr, *out_attrs;
3609
3610 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3611 {
3612 /* This is the first object. Copy the attributes. */
3613 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3614
3615 /* Use the Tag_null value to indicate the attributes have been
3616 initialized. */
3617 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3618
3619 return TRUE;
3620 }
3621
3622 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3623 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3624
3625 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3626 non-conflicting ones. */
3627 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3628 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3629 if (in_attr->i != out_attr->i)
3630 {
3631 out_attr->type = 1;
3632 if (out_attr->i == 0)
3633 out_attr->i = in_attr->i;
3634 else if (in_attr->i == 0)
3635 ;
3636 else if (out_attr->i == 1 && in_attr->i == 2)
3637 _bfd_error_handler
3638 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3639 else if (out_attr->i == 2 && in_attr->i == 1)
3640 _bfd_error_handler
3641 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3642 else if (in_attr->i > 2)
3643 _bfd_error_handler
3644 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3645 in_attr->i);
3646 else
3647 _bfd_error_handler
3648 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3649 out_attr->i);
3650 }
3651
3652 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3653 merge non-conflicting ones. */
3654 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3655 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3656 if (in_attr->i != out_attr->i)
3657 {
3658 const char *in_abi = NULL, *out_abi = NULL;
3659
3660 switch (in_attr->i)
3661 {
3662 case 1: in_abi = "generic"; break;
3663 case 2: in_abi = "AltiVec"; break;
3664 case 3: in_abi = "SPE"; break;
3665 }
3666
3667 switch (out_attr->i)
3668 {
3669 case 1: out_abi = "generic"; break;
3670 case 2: out_abi = "AltiVec"; break;
3671 case 3: out_abi = "SPE"; break;
3672 }
3673
3674 out_attr->type = 1;
3675 if (out_attr->i == 0)
3676 out_attr->i = in_attr->i;
3677 else if (in_attr->i == 0)
3678 ;
3679 /* For now, allow generic to transition to AltiVec or SPE
3680 without a warning. If GCC marked files with their stack
3681 alignment and used don't-care markings for files which are
3682 not affected by the vector ABI, we could warn about this
3683 case too. */
3684 else if (out_attr->i == 1)
3685 out_attr->i = in_attr->i;
3686 else if (in_attr->i == 1)
3687 ;
3688 else if (in_abi == NULL)
3689 _bfd_error_handler
3690 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3691 in_attr->i);
3692 else if (out_abi == NULL)
3693 _bfd_error_handler
3694 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3695 in_attr->i);
3696 else
3697 _bfd_error_handler
3698 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3699 ibfd, obfd, in_abi, out_abi);
3700 }
3701
3702 /* Merge Tag_compatibility attributes and any common GNU ones. */
3703 _bfd_elf_merge_object_attributes (ibfd, obfd);
3704
3705 return TRUE;
3706 }
3707
3708 /* Merge backend specific data from an object file to the output
3709 object file when linking. */
3710
3711 static bfd_boolean
3712 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3713 {
3714 flagword old_flags;
3715 flagword new_flags;
3716 bfd_boolean error;
3717
3718 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3719 return TRUE;
3720
3721 /* Check if we have the same endianess. */
3722 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3723 return FALSE;
3724
3725 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3726 return FALSE;
3727
3728 new_flags = elf_elfheader (ibfd)->e_flags;
3729 old_flags = elf_elfheader (obfd)->e_flags;
3730 if (!elf_flags_init (obfd))
3731 {
3732 /* First call, no flags set. */
3733 elf_flags_init (obfd) = TRUE;
3734 elf_elfheader (obfd)->e_flags = new_flags;
3735 }
3736
3737 /* Compatible flags are ok. */
3738 else if (new_flags == old_flags)
3739 ;
3740
3741 /* Incompatible flags. */
3742 else
3743 {
3744 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3745 to be linked with either. */
3746 error = FALSE;
3747 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3748 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3749 {
3750 error = TRUE;
3751 (*_bfd_error_handler)
3752 (_("%B: compiled with -mrelocatable and linked with "
3753 "modules compiled normally"), ibfd);
3754 }
3755 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3756 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3757 {
3758 error = TRUE;
3759 (*_bfd_error_handler)
3760 (_("%B: compiled normally and linked with "
3761 "modules compiled with -mrelocatable"), ibfd);
3762 }
3763
3764 /* The output is -mrelocatable-lib iff both the input files are. */
3765 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3766 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3767
3768 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3769 but each input file is either -mrelocatable or -mrelocatable-lib. */
3770 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3771 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3772 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3773 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3774
3775 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3776 any module uses it. */
3777 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3778
3779 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3780 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3781
3782 /* Warn about any other mismatches. */
3783 if (new_flags != old_flags)
3784 {
3785 error = TRUE;
3786 (*_bfd_error_handler)
3787 (_("%B: uses different e_flags (0x%lx) fields "
3788 "than previous modules (0x%lx)"),
3789 ibfd, (long) new_flags, (long) old_flags);
3790 }
3791
3792 if (error)
3793 {
3794 bfd_set_error (bfd_error_bad_value);
3795 return FALSE;
3796 }
3797 }
3798
3799 return TRUE;
3800 }
3801 \f
3802 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3803 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3804 int
3805 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3806 struct bfd_link_info *info,
3807 enum ppc_elf_plt_type plt_style,
3808 int emit_stub_syms)
3809 {
3810 struct ppc_elf_link_hash_table *htab;
3811 flagword flags;
3812
3813 htab = ppc_elf_hash_table (info);
3814
3815 if (htab->plt_type == PLT_UNSET)
3816 {
3817 if (plt_style == PLT_OLD)
3818 htab->plt_type = PLT_OLD;
3819 else
3820 {
3821 bfd *ibfd;
3822 enum ppc_elf_plt_type plt_type = plt_style;
3823
3824 /* Look through the reloc flags left by ppc_elf_check_relocs.
3825 Use the old style bss plt if a file makes plt calls
3826 without using the new relocs, and if ld isn't given
3827 --secure-plt and we never see REL16 relocs. */
3828 if (plt_type == PLT_UNSET)
3829 plt_type = PLT_OLD;
3830 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3831 if (is_ppc_elf (ibfd))
3832 {
3833 if (ppc_elf_tdata (ibfd)->has_rel16)
3834 plt_type = PLT_NEW;
3835 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3836 {
3837 plt_type = PLT_OLD;
3838 htab->old_bfd = ibfd;
3839 break;
3840 }
3841 }
3842 htab->plt_type = plt_type;
3843 }
3844 }
3845 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3846 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3847
3848 htab->emit_stub_syms = emit_stub_syms;
3849
3850 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3851
3852 if (htab->plt_type == PLT_NEW)
3853 {
3854 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3855 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3856
3857 /* The new PLT is a loaded section. */
3858 if (htab->plt != NULL
3859 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3860 return -1;
3861
3862 /* The new GOT is not executable. */
3863 if (htab->got != NULL
3864 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3865 return -1;
3866 }
3867 else
3868 {
3869 /* Stop an unused .glink section from affecting .text alignment. */
3870 if (htab->glink != NULL
3871 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3872 return -1;
3873 }
3874 return htab->plt_type == PLT_NEW;
3875 }
3876 \f
3877 /* Return the section that should be marked against GC for a given
3878 relocation. */
3879
3880 static asection *
3881 ppc_elf_gc_mark_hook (asection *sec,
3882 struct bfd_link_info *info,
3883 Elf_Internal_Rela *rel,
3884 struct elf_link_hash_entry *h,
3885 Elf_Internal_Sym *sym)
3886 {
3887 if (h != NULL)
3888 switch (ELF32_R_TYPE (rel->r_info))
3889 {
3890 case R_PPC_GNU_VTINHERIT:
3891 case R_PPC_GNU_VTENTRY:
3892 return NULL;
3893 }
3894
3895 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3896 }
3897
3898 /* Update the got, plt and dynamic reloc reference counts for the
3899 section being removed. */
3900
3901 static bfd_boolean
3902 ppc_elf_gc_sweep_hook (bfd *abfd,
3903 struct bfd_link_info *info,
3904 asection *sec,
3905 const Elf_Internal_Rela *relocs)
3906 {
3907 struct ppc_elf_link_hash_table *htab;
3908 Elf_Internal_Shdr *symtab_hdr;
3909 struct elf_link_hash_entry **sym_hashes;
3910 bfd_signed_vma *local_got_refcounts;
3911 const Elf_Internal_Rela *rel, *relend;
3912 asection *got2;
3913
3914 if (info->relocatable)
3915 return TRUE;
3916
3917 if ((sec->flags & SEC_ALLOC) == 0)
3918 return TRUE;
3919
3920 elf_section_data (sec)->local_dynrel = NULL;
3921
3922 htab = ppc_elf_hash_table (info);
3923 symtab_hdr = &elf_symtab_hdr (abfd);
3924 sym_hashes = elf_sym_hashes (abfd);
3925 local_got_refcounts = elf_local_got_refcounts (abfd);
3926 got2 = bfd_get_section_by_name (abfd, ".got2");
3927
3928 relend = relocs + sec->reloc_count;
3929 for (rel = relocs; rel < relend; rel++)
3930 {
3931 unsigned long r_symndx;
3932 enum elf_ppc_reloc_type r_type;
3933 struct elf_link_hash_entry *h = NULL;
3934
3935 r_symndx = ELF32_R_SYM (rel->r_info);
3936 if (r_symndx >= symtab_hdr->sh_info)
3937 {
3938 struct ppc_elf_dyn_relocs **pp, *p;
3939 struct ppc_elf_link_hash_entry *eh;
3940
3941 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3942 while (h->root.type == bfd_link_hash_indirect
3943 || h->root.type == bfd_link_hash_warning)
3944 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3945 eh = (struct ppc_elf_link_hash_entry *) h;
3946
3947 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3948 if (p->sec == sec)
3949 {
3950 /* Everything must go for SEC. */
3951 *pp = p->next;
3952 break;
3953 }
3954 }
3955
3956 r_type = ELF32_R_TYPE (rel->r_info);
3957 switch (r_type)
3958 {
3959 case R_PPC_GOT_TLSLD16:
3960 case R_PPC_GOT_TLSLD16_LO:
3961 case R_PPC_GOT_TLSLD16_HI:
3962 case R_PPC_GOT_TLSLD16_HA:
3963 case R_PPC_GOT_TLSGD16:
3964 case R_PPC_GOT_TLSGD16_LO:
3965 case R_PPC_GOT_TLSGD16_HI:
3966 case R_PPC_GOT_TLSGD16_HA:
3967 case R_PPC_GOT_TPREL16:
3968 case R_PPC_GOT_TPREL16_LO:
3969 case R_PPC_GOT_TPREL16_HI:
3970 case R_PPC_GOT_TPREL16_HA:
3971 case R_PPC_GOT_DTPREL16:
3972 case R_PPC_GOT_DTPREL16_LO:
3973 case R_PPC_GOT_DTPREL16_HI:
3974 case R_PPC_GOT_DTPREL16_HA:
3975 case R_PPC_GOT16:
3976 case R_PPC_GOT16_LO:
3977 case R_PPC_GOT16_HI:
3978 case R_PPC_GOT16_HA:
3979 if (h != NULL)
3980 {
3981 if (h->got.refcount > 0)
3982 h->got.refcount--;
3983 }
3984 else if (local_got_refcounts != NULL)
3985 {
3986 if (local_got_refcounts[r_symndx] > 0)
3987 local_got_refcounts[r_symndx]--;
3988 }
3989 break;
3990
3991 case R_PPC_REL24:
3992 case R_PPC_REL14:
3993 case R_PPC_REL14_BRTAKEN:
3994 case R_PPC_REL14_BRNTAKEN:
3995 case R_PPC_REL32:
3996 if (h == NULL || h == htab->elf.hgot)
3997 break;
3998 /* Fall thru */
3999
4000 case R_PPC_ADDR32:
4001 case R_PPC_ADDR24:
4002 case R_PPC_ADDR16:
4003 case R_PPC_ADDR16_LO:
4004 case R_PPC_ADDR16_HI:
4005 case R_PPC_ADDR16_HA:
4006 case R_PPC_ADDR14:
4007 case R_PPC_ADDR14_BRTAKEN:
4008 case R_PPC_ADDR14_BRNTAKEN:
4009 case R_PPC_UADDR32:
4010 case R_PPC_UADDR16:
4011 if (info->shared)
4012 break;
4013
4014 case R_PPC_PLT32:
4015 case R_PPC_PLTREL24:
4016 case R_PPC_PLTREL32:
4017 case R_PPC_PLT16_LO:
4018 case R_PPC_PLT16_HI:
4019 case R_PPC_PLT16_HA:
4020 if (h != NULL)
4021 {
4022 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4023 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4024 if (ent->plt.refcount > 0)
4025 ent->plt.refcount -= 1;
4026 }
4027 break;
4028
4029 default:
4030 break;
4031 }
4032 }
4033 return TRUE;
4034 }
4035 \f
4036 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4037
4038 asection *
4039 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4040 {
4041 struct ppc_elf_link_hash_table *htab;
4042
4043 htab = ppc_elf_hash_table (info);
4044 if (htab->plt_type == PLT_NEW
4045 && htab->plt != NULL
4046 && htab->plt->output_section != NULL)
4047 {
4048 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4049 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4050 }
4051
4052 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4053 FALSE, FALSE, TRUE);
4054 return _bfd_elf_tls_setup (obfd, info);
4055 }
4056
4057 /* Run through all the TLS relocs looking for optimization
4058 opportunities. */
4059
4060 bfd_boolean
4061 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4062 struct bfd_link_info *info)
4063 {
4064 bfd *ibfd;
4065 asection *sec;
4066 struct ppc_elf_link_hash_table *htab;
4067 int pass;
4068
4069 if (info->relocatable || info->shared)
4070 return TRUE;
4071
4072 htab = ppc_elf_hash_table (info);
4073 /* Make two passes through the relocs. First time check that tls
4074 relocs involved in setting up a tls_get_addr call are indeed
4075 followed by such a call. If they are not, exclude them from
4076 the optimizations done on the second pass. */
4077 for (pass = 0; pass < 2; ++pass)
4078 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4079 {
4080 Elf_Internal_Sym *locsyms = NULL;
4081 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4082
4083 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4084 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4085 {
4086 Elf_Internal_Rela *relstart, *rel, *relend;
4087
4088 /* Read the relocations. */
4089 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4090 info->keep_memory);
4091 if (relstart == NULL)
4092 return FALSE;
4093
4094 relend = relstart + sec->reloc_count;
4095 for (rel = relstart; rel < relend; rel++)
4096 {
4097 enum elf_ppc_reloc_type r_type;
4098 unsigned long r_symndx;
4099 struct elf_link_hash_entry *h = NULL;
4100 char *tls_mask;
4101 char tls_set, tls_clear;
4102 bfd_boolean is_local;
4103 int expecting_tls_get_addr;
4104 bfd_signed_vma *got_count;
4105
4106 r_symndx = ELF32_R_SYM (rel->r_info);
4107 if (r_symndx >= symtab_hdr->sh_info)
4108 {
4109 struct elf_link_hash_entry **sym_hashes;
4110
4111 sym_hashes = elf_sym_hashes (ibfd);
4112 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4113 while (h->root.type == bfd_link_hash_indirect
4114 || h->root.type == bfd_link_hash_warning)
4115 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4116 }
4117
4118 expecting_tls_get_addr = 0;
4119 is_local = FALSE;
4120 if (h == NULL
4121 || !h->def_dynamic)
4122 is_local = TRUE;
4123
4124 r_type = ELF32_R_TYPE (rel->r_info);
4125 switch (r_type)
4126 {
4127 case R_PPC_GOT_TLSLD16:
4128 case R_PPC_GOT_TLSLD16_LO:
4129 expecting_tls_get_addr = 1;
4130 /* Fall thru */
4131
4132 case R_PPC_GOT_TLSLD16_HI:
4133 case R_PPC_GOT_TLSLD16_HA:
4134 /* These relocs should never be against a symbol
4135 defined in a shared lib. Leave them alone if
4136 that turns out to be the case. */
4137 if (!is_local)
4138 continue;
4139
4140 /* LD -> LE */
4141 tls_set = 0;
4142 tls_clear = TLS_LD;
4143 break;
4144
4145 case R_PPC_GOT_TLSGD16:
4146 case R_PPC_GOT_TLSGD16_LO:
4147 expecting_tls_get_addr = 1;
4148 /* Fall thru */
4149
4150 case R_PPC_GOT_TLSGD16_HI:
4151 case R_PPC_GOT_TLSGD16_HA:
4152 if (is_local)
4153 /* GD -> LE */
4154 tls_set = 0;
4155 else
4156 /* GD -> IE */
4157 tls_set = TLS_TLS | TLS_TPRELGD;
4158 tls_clear = TLS_GD;
4159 break;
4160
4161 case R_PPC_GOT_TPREL16:
4162 case R_PPC_GOT_TPREL16_LO:
4163 case R_PPC_GOT_TPREL16_HI:
4164 case R_PPC_GOT_TPREL16_HA:
4165 if (is_local)
4166 {
4167 /* IE -> LE */
4168 tls_set = 0;
4169 tls_clear = TLS_TPREL;
4170 break;
4171 }
4172 else
4173 continue;
4174
4175 default:
4176 continue;
4177 }
4178
4179 if (pass == 0)
4180 {
4181 if (!expecting_tls_get_addr)
4182 continue;
4183
4184 if (rel + 1 < relend)
4185 {
4186 enum elf_ppc_reloc_type r_type2;
4187 unsigned long r_symndx2;
4188 struct elf_link_hash_entry *h2;
4189
4190 /* The next instruction should be a call to
4191 __tls_get_addr. Peek at the reloc to be sure. */
4192 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4193 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4194 if (r_symndx2 >= symtab_hdr->sh_info
4195 && (r_type2 == R_PPC_REL14
4196 || r_type2 == R_PPC_REL14_BRTAKEN
4197 || r_type2 == R_PPC_REL14_BRNTAKEN
4198 || r_type2 == R_PPC_REL24
4199 || r_type2 == R_PPC_PLTREL24))
4200 {
4201 struct elf_link_hash_entry **sym_hashes;
4202
4203 sym_hashes = elf_sym_hashes (ibfd);
4204 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4205 while (h2->root.type == bfd_link_hash_indirect
4206 || h2->root.type == bfd_link_hash_warning)
4207 h2 = ((struct elf_link_hash_entry *)
4208 h2->root.u.i.link);
4209 if (h2 == htab->tls_get_addr)
4210 continue;
4211 }
4212 }
4213
4214 /* Uh oh, we didn't find the expected call. We
4215 could just mark this symbol to exclude it
4216 from tls optimization but it's safer to skip
4217 the entire section. */
4218 sec->has_tls_reloc = 0;
4219 break;
4220 }
4221
4222 if (h != NULL)
4223 {
4224 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4225 got_count = &h->got.refcount;
4226 }
4227 else
4228 {
4229 Elf_Internal_Sym *sym;
4230 bfd_signed_vma *lgot_refs;
4231 char *lgot_masks;
4232
4233 if (locsyms == NULL)
4234 {
4235 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4236 if (locsyms == NULL)
4237 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4238 symtab_hdr->sh_info,
4239 0, NULL, NULL, NULL);
4240 if (locsyms == NULL)
4241 {
4242 if (elf_section_data (sec)->relocs != relstart)
4243 free (relstart);
4244 return FALSE;
4245 }
4246 }
4247 sym = locsyms + r_symndx;
4248 lgot_refs = elf_local_got_refcounts (ibfd);
4249 if (lgot_refs == NULL)
4250 abort ();
4251 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4252 tls_mask = &lgot_masks[r_symndx];
4253 got_count = &lgot_refs[r_symndx];
4254 }
4255
4256 if (tls_set == 0)
4257 {
4258 /* We managed to get rid of a got entry. */
4259 if (*got_count > 0)
4260 *got_count -= 1;
4261 }
4262
4263 if (expecting_tls_get_addr)
4264 {
4265 struct plt_entry *ent;
4266
4267 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4268 if (ent != NULL && ent->plt.refcount > 0)
4269 ent->plt.refcount -= 1;
4270 }
4271
4272 *tls_mask |= tls_set;
4273 *tls_mask &= ~tls_clear;
4274 }
4275
4276 if (elf_section_data (sec)->relocs != relstart)
4277 free (relstart);
4278 }
4279
4280 if (locsyms != NULL
4281 && (symtab_hdr->contents != (unsigned char *) locsyms))
4282 {
4283 if (!info->keep_memory)
4284 free (locsyms);
4285 else
4286 symtab_hdr->contents = (unsigned char *) locsyms;
4287 }
4288 }
4289 return TRUE;
4290 }
4291 \f
4292 /* Adjust a symbol defined by a dynamic object and referenced by a
4293 regular object. The current definition is in some section of the
4294 dynamic object, but we're not including those sections. We have to
4295 change the definition to something the rest of the link can
4296 understand. */
4297
4298 static bfd_boolean
4299 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4300 struct elf_link_hash_entry *h)
4301 {
4302 struct ppc_elf_link_hash_table *htab;
4303 asection *s;
4304
4305 #ifdef DEBUG
4306 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4307 h->root.root.string);
4308 #endif
4309
4310 /* Make sure we know what is going on here. */
4311 htab = ppc_elf_hash_table (info);
4312 BFD_ASSERT (htab->elf.dynobj != NULL
4313 && (h->needs_plt
4314 || h->u.weakdef != NULL
4315 || (h->def_dynamic
4316 && h->ref_regular
4317 && !h->def_regular)));
4318
4319 /* Deal with function syms. */
4320 if (h->type == STT_FUNC
4321 || h->needs_plt)
4322 {
4323 /* Clear procedure linkage table information for any symbol that
4324 won't need a .plt entry. */
4325 struct plt_entry *ent;
4326 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4327 if (ent->plt.refcount > 0)
4328 break;
4329 if (ent == NULL
4330 || SYMBOL_CALLS_LOCAL (info, h)
4331 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4332 && h->root.type == bfd_link_hash_undefweak))
4333 {
4334 /* A PLT entry is not required/allowed when:
4335
4336 1. We are not using ld.so; because then the PLT entry
4337 can't be set up, so we can't use one. In this case,
4338 ppc_elf_adjust_dynamic_symbol won't even be called.
4339
4340 2. GC has rendered the entry unused.
4341
4342 3. We know for certain that a call to this symbol
4343 will go to this object, or will remain undefined. */
4344 h->plt.plist = NULL;
4345 h->needs_plt = 0;
4346 }
4347 return TRUE;
4348 }
4349 else
4350 h->plt.plist = NULL;
4351
4352 /* If this is a weak symbol, and there is a real definition, the
4353 processor independent code will have arranged for us to see the
4354 real definition first, and we can just use the same value. */
4355 if (h->u.weakdef != NULL)
4356 {
4357 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4358 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4359 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4360 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4361 if (ELIMINATE_COPY_RELOCS)
4362 h->non_got_ref = h->u.weakdef->non_got_ref;
4363 return TRUE;
4364 }
4365
4366 /* This is a reference to a symbol defined by a dynamic object which
4367 is not a function. */
4368
4369 /* If we are creating a shared library, we must presume that the
4370 only references to the symbol are via the global offset table.
4371 For such cases we need not do anything here; the relocations will
4372 be handled correctly by relocate_section. */
4373 if (info->shared)
4374 return TRUE;
4375
4376 /* If there are no references to this symbol that do not use the
4377 GOT, we don't need to generate a copy reloc. */
4378 if (!h->non_got_ref)
4379 return TRUE;
4380
4381 /* If we didn't find any dynamic relocs in read-only sections, then
4382 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4383 We can't do this if there are any small data relocations. This
4384 doesn't work on VxWorks, where we can not have dynamic
4385 relocations (other than copy and jump slot relocations) in an
4386 executable. */
4387 if (ELIMINATE_COPY_RELOCS
4388 && !ppc_elf_hash_entry (h)->has_sda_refs
4389 && !htab->is_vxworks)
4390 {
4391 struct ppc_elf_dyn_relocs *p;
4392 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4393 {
4394 s = p->sec->output_section;
4395 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4396 break;
4397 }
4398
4399 if (p == NULL)
4400 {
4401 h->non_got_ref = 0;
4402 return TRUE;
4403 }
4404 }
4405
4406 if (h->size == 0)
4407 {
4408 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4409 h->root.root.string);
4410 return TRUE;
4411 }
4412
4413 /* We must allocate the symbol in our .dynbss section, which will
4414 become part of the .bss section of the executable. There will be
4415 an entry for this symbol in the .dynsym section. The dynamic
4416 object will contain position independent code, so all references
4417 from the dynamic object to this symbol will go through the global
4418 offset table. The dynamic linker will use the .dynsym entry to
4419 determine the address it must put in the global offset table, so
4420 both the dynamic object and the regular object will refer to the
4421 same memory location for the variable.
4422
4423 Of course, if the symbol is referenced using SDAREL relocs, we
4424 must instead allocate it in .sbss. */
4425
4426 if (ppc_elf_hash_entry (h)->has_sda_refs)
4427 s = htab->dynsbss;
4428 else
4429 s = htab->dynbss;
4430 BFD_ASSERT (s != NULL);
4431
4432 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4433 copy the initial value out of the dynamic object and into the
4434 runtime process image. We need to remember the offset into the
4435 .rela.bss section we are going to use. */
4436 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4437 {
4438 asection *srel;
4439
4440 if (ppc_elf_hash_entry (h)->has_sda_refs)
4441 srel = htab->relsbss;
4442 else
4443 srel = htab->relbss;
4444 BFD_ASSERT (srel != NULL);
4445 srel->size += sizeof (Elf32_External_Rela);
4446 h->needs_copy = 1;
4447 }
4448
4449 return _bfd_elf_adjust_dynamic_copy (h, s);
4450 }
4451 \f
4452 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4453 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4454 specifying the addend on the plt relocation. For -fpic code, the sym
4455 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4456 xxxxxxxx.got2.plt_pic32.<callee>. */
4457
4458 static bfd_boolean
4459 add_stub_sym (struct plt_entry *ent,
4460 struct elf_link_hash_entry *h,
4461 struct bfd_link_info *info)
4462 {
4463 struct elf_link_hash_entry *sh;
4464 size_t len1, len2, len3;
4465 char *name;
4466 const char *stub;
4467 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4468
4469 if (info->shared || info->pie)
4470 stub = ".plt_pic32.";
4471 else
4472 stub = ".plt_call32.";
4473
4474 len1 = strlen (h->root.root.string);
4475 len2 = strlen (stub);
4476 len3 = 0;
4477 if (ent->sec)
4478 len3 = strlen (ent->sec->name);
4479 name = bfd_malloc (len1 + len2 + len3 + 9);
4480 if (name == NULL)
4481 return FALSE;
4482 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4483 if (ent->sec)
4484 memcpy (name + 8, ent->sec->name, len3);
4485 memcpy (name + 8 + len3, stub, len2);
4486 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4487 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4488 if (sh == NULL)
4489 return FALSE;
4490 if (sh->root.type == bfd_link_hash_new)
4491 {
4492 sh->root.type = bfd_link_hash_defined;
4493 sh->root.u.def.section = htab->glink;
4494 sh->root.u.def.value = ent->glink_offset;
4495 sh->ref_regular = 1;
4496 sh->def_regular = 1;
4497 sh->ref_regular_nonweak = 1;
4498 sh->forced_local = 1;
4499 sh->non_elf = 0;
4500 }
4501 return TRUE;
4502 }
4503
4504 /* Allocate NEED contiguous space in .got, and return the offset.
4505 Handles allocation of the got header when crossing 32k. */
4506
4507 static bfd_vma
4508 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4509 {
4510 bfd_vma where;
4511 unsigned int max_before_header;
4512
4513 if (htab->plt_type == PLT_VXWORKS)
4514 {
4515 where = htab->got->size;
4516 htab->got->size += need;
4517 }
4518 else
4519 {
4520 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4521 if (need <= htab->got_gap)
4522 {
4523 where = max_before_header - htab->got_gap;
4524 htab->got_gap -= need;
4525 }
4526 else
4527 {
4528 if (htab->got->size + need > max_before_header
4529 && htab->got->size <= max_before_header)
4530 {
4531 htab->got_gap = max_before_header - htab->got->size;
4532 htab->got->size = max_before_header + htab->got_header_size;
4533 }
4534 where = htab->got->size;
4535 htab->got->size += need;
4536 }
4537 }
4538 return where;
4539 }
4540
4541 /* Allocate space in associated reloc sections for dynamic relocs. */
4542
4543 static bfd_boolean
4544 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4545 {
4546 struct bfd_link_info *info = inf;
4547 struct ppc_elf_link_hash_entry *eh;
4548 struct ppc_elf_link_hash_table *htab;
4549 struct ppc_elf_dyn_relocs *p;
4550
4551 if (h->root.type == bfd_link_hash_indirect)
4552 return TRUE;
4553
4554 if (h->root.type == bfd_link_hash_warning)
4555 /* When warning symbols are created, they **replace** the "real"
4556 entry in the hash table, thus we never get to see the real
4557 symbol in a hash traversal. So look at it now. */
4558 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4559
4560 htab = ppc_elf_hash_table (info);
4561 if (htab->elf.dynamic_sections_created)
4562 {
4563 struct plt_entry *ent;
4564 bfd_boolean doneone = FALSE;
4565 bfd_vma plt_offset = 0, glink_offset = 0;
4566
4567 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4568 if (ent->plt.refcount > 0)
4569 {
4570 /* Make sure this symbol is output as a dynamic symbol. */
4571 if (h->dynindx == -1
4572 && !h->forced_local)
4573 {
4574 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4575 return FALSE;
4576 }
4577
4578 if (info->shared
4579 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4580 {
4581 asection *s = htab->plt;
4582
4583 if (htab->plt_type == PLT_NEW)
4584 {
4585 if (!doneone)
4586 {
4587 plt_offset = s->size;
4588 s->size += 4;
4589 }
4590 ent->plt.offset = plt_offset;
4591
4592 s = htab->glink;
4593 if (!doneone || info->shared || info->pie)
4594 {
4595 glink_offset = s->size;
4596 s->size += GLINK_ENTRY_SIZE;
4597 }
4598 if (!doneone
4599 && !info->shared
4600 && !h->def_regular)
4601 {
4602 h->root.u.def.section = s;
4603 h->root.u.def.value = glink_offset;
4604 }
4605 ent->glink_offset = glink_offset;
4606
4607 if (htab->emit_stub_syms
4608 && !add_stub_sym (ent, h, info))
4609 return FALSE;
4610 }
4611 else
4612 {
4613 if (!doneone)
4614 {
4615 /* If this is the first .plt entry, make room
4616 for the special first entry. */
4617 if (s->size == 0)
4618 s->size += htab->plt_initial_entry_size;
4619
4620 /* The PowerPC PLT is actually composed of two
4621 parts, the first part is 2 words (for a load
4622 and a jump), and then there is a remaining
4623 word available at the end. */
4624 plt_offset = (htab->plt_initial_entry_size
4625 + (htab->plt_slot_size
4626 * ((s->size
4627 - htab->plt_initial_entry_size)
4628 / htab->plt_entry_size)));
4629
4630 /* If this symbol is not defined in a regular
4631 file, and we are not generating a shared
4632 library, then set the symbol to this location
4633 in the .plt. This is required to make
4634 function pointers compare as equal between
4635 the normal executable and the shared library. */
4636 if (! info->shared
4637 && !h->def_regular)
4638 {
4639 h->root.u.def.section = s;
4640 h->root.u.def.value = plt_offset;
4641 }
4642
4643 /* Make room for this entry. */
4644 s->size += htab->plt_entry_size;
4645 /* After the 8192nd entry, room for two entries
4646 is allocated. */
4647 if (htab->plt_type == PLT_OLD
4648 && (s->size - htab->plt_initial_entry_size)
4649 / htab->plt_entry_size
4650 > PLT_NUM_SINGLE_ENTRIES)
4651 s->size += htab->plt_entry_size;
4652 }
4653 ent->plt.offset = plt_offset;
4654 }
4655
4656 /* We also need to make an entry in the .rela.plt section. */
4657 if (!doneone)
4658 {
4659 htab->relplt->size += sizeof (Elf32_External_Rela);
4660
4661 if (htab->plt_type == PLT_VXWORKS)
4662 {
4663 /* Allocate space for the unloaded relocations. */
4664 if (!info->shared)
4665 {
4666 if (ent->plt.offset
4667 == (bfd_vma) htab->plt_initial_entry_size)
4668 {
4669 htab->srelplt2->size
4670 += sizeof (Elf32_External_Rela)
4671 * VXWORKS_PLTRESOLVE_RELOCS;
4672 }
4673
4674 htab->srelplt2->size
4675 += sizeof (Elf32_External_Rela)
4676 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4677 }
4678
4679 /* Every PLT entry has an associated GOT entry in
4680 .got.plt. */
4681 htab->sgotplt->size += 4;
4682 }
4683 doneone = TRUE;
4684 }
4685 }
4686 else
4687 ent->plt.offset = (bfd_vma) -1;
4688 }
4689 else
4690 ent->plt.offset = (bfd_vma) -1;
4691
4692 if (!doneone)
4693 {
4694 h->plt.plist = NULL;
4695 h->needs_plt = 0;
4696 }
4697 }
4698 else
4699 {
4700 h->plt.plist = NULL;
4701 h->needs_plt = 0;
4702 }
4703
4704 eh = (struct ppc_elf_link_hash_entry *) h;
4705 if (eh->elf.got.refcount > 0)
4706 {
4707 /* Make sure this symbol is output as a dynamic symbol. */
4708 if (eh->elf.dynindx == -1
4709 && !eh->elf.forced_local)
4710 {
4711 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4712 return FALSE;
4713 }
4714
4715 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4716 && !eh->elf.def_dynamic)
4717 {
4718 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4719 htab->tlsld_got.refcount += 1;
4720 eh->elf.got.offset = (bfd_vma) -1;
4721 }
4722 else
4723 {
4724 bfd_boolean dyn;
4725 unsigned int need = 0;
4726 if ((eh->tls_mask & TLS_TLS) != 0)
4727 {
4728 if ((eh->tls_mask & TLS_LD) != 0)
4729 need += 8;
4730 if ((eh->tls_mask & TLS_GD) != 0)
4731 need += 8;
4732 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4733 need += 4;
4734 if ((eh->tls_mask & TLS_DTPREL) != 0)
4735 need += 4;
4736 }
4737 else
4738 need += 4;
4739 eh->elf.got.offset = allocate_got (htab, need);
4740 dyn = htab->elf.dynamic_sections_created;
4741 if ((info->shared
4742 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4743 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4744 || eh->elf.root.type != bfd_link_hash_undefweak))
4745 {
4746 /* All the entries we allocated need relocs.
4747 Except LD only needs one. */
4748 if ((eh->tls_mask & TLS_LD) != 0)
4749 need -= 4;
4750 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4751 }
4752 }
4753 }
4754 else
4755 eh->elf.got.offset = (bfd_vma) -1;
4756
4757 if (eh->dyn_relocs == NULL)
4758 return TRUE;
4759
4760 /* In the shared -Bsymbolic case, discard space allocated for
4761 dynamic pc-relative relocs against symbols which turn out to be
4762 defined in regular objects. For the normal shared case, discard
4763 space for relocs that have become local due to symbol visibility
4764 changes. */
4765
4766 if (info->shared)
4767 {
4768 /* Relocs that use pc_count are those that appear on a call insn,
4769 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4770 generated via assembly. We want calls to protected symbols to
4771 resolve directly to the function rather than going via the plt.
4772 If people want function pointer comparisons to work as expected
4773 then they should avoid writing weird assembly. */
4774 if (SYMBOL_CALLS_LOCAL (info, h))
4775 {
4776 struct ppc_elf_dyn_relocs **pp;
4777
4778 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4779 {
4780 p->count -= p->pc_count;
4781 p->pc_count = 0;
4782 if (p->count == 0)
4783 *pp = p->next;
4784 else
4785 pp = &p->next;
4786 }
4787 }
4788
4789 /* Also discard relocs on undefined weak syms with non-default
4790 visibility. */
4791 if (eh->dyn_relocs != NULL
4792 && h->root.type == bfd_link_hash_undefweak)
4793 {
4794 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4795 eh->dyn_relocs = NULL;
4796
4797 /* Make sure undefined weak symbols are output as a dynamic
4798 symbol in PIEs. */
4799 else if (h->dynindx == -1
4800 && !h->forced_local)
4801 {
4802 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4803 return FALSE;
4804 }
4805 }
4806 }
4807 else if (ELIMINATE_COPY_RELOCS)
4808 {
4809 /* For the non-shared case, discard space for relocs against
4810 symbols which turn out to need copy relocs or are not
4811 dynamic. */
4812
4813 if (!h->non_got_ref
4814 && h->def_dynamic
4815 && !h->def_regular)
4816 {
4817 /* Make sure this symbol is output as a dynamic symbol.
4818 Undefined weak syms won't yet be marked as dynamic. */
4819 if (h->dynindx == -1
4820 && !h->forced_local)
4821 {
4822 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4823 return FALSE;
4824 }
4825
4826 /* If that succeeded, we know we'll be keeping all the
4827 relocs. */
4828 if (h->dynindx != -1)
4829 goto keep;
4830 }
4831
4832 eh->dyn_relocs = NULL;
4833
4834 keep: ;
4835 }
4836
4837 /* Finally, allocate space. */
4838 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4839 {
4840 asection *sreloc = elf_section_data (p->sec)->sreloc;
4841 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4842 }
4843
4844 return TRUE;
4845 }
4846
4847 /* Find any dynamic relocs that apply to read-only sections. */
4848
4849 static bfd_boolean
4850 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4851 {
4852 struct ppc_elf_dyn_relocs *p;
4853
4854 if (h->root.type == bfd_link_hash_indirect)
4855 return TRUE;
4856
4857 if (h->root.type == bfd_link_hash_warning)
4858 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4859
4860 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4861 {
4862 asection *s = p->sec->output_section;
4863
4864 if (s != NULL
4865 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4866 == (SEC_READONLY | SEC_ALLOC)))
4867 {
4868 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4869
4870 /* Not an error, just cut short the traversal. */
4871 return FALSE;
4872 }
4873 }
4874 return TRUE;
4875 }
4876
4877 /* Set the sizes of the dynamic sections. */
4878
4879 static bfd_boolean
4880 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4881 struct bfd_link_info *info)
4882 {
4883 struct ppc_elf_link_hash_table *htab;
4884 asection *s;
4885 bfd_boolean relocs;
4886 bfd *ibfd;
4887
4888 #ifdef DEBUG
4889 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4890 #endif
4891
4892 htab = ppc_elf_hash_table (info);
4893 BFD_ASSERT (htab->elf.dynobj != NULL);
4894
4895 if (elf_hash_table (info)->dynamic_sections_created)
4896 {
4897 /* Set the contents of the .interp section to the interpreter. */
4898 if (info->executable)
4899 {
4900 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4901 BFD_ASSERT (s != NULL);
4902 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4903 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4904 }
4905 }
4906
4907 if (htab->plt_type == PLT_OLD)
4908 htab->got_header_size = 16;
4909 else if (htab->plt_type == PLT_NEW)
4910 htab->got_header_size = 12;
4911
4912 /* Set up .got offsets for local syms, and space for local dynamic
4913 relocs. */
4914 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4915 {
4916 bfd_signed_vma *local_got;
4917 bfd_signed_vma *end_local_got;
4918 char *lgot_masks;
4919 bfd_size_type locsymcount;
4920 Elf_Internal_Shdr *symtab_hdr;
4921
4922 if (!is_ppc_elf (ibfd))
4923 continue;
4924
4925 for (s = ibfd->sections; s != NULL; s = s->next)
4926 {
4927 struct ppc_elf_dyn_relocs *p;
4928
4929 for (p = ((struct ppc_elf_dyn_relocs *)
4930 elf_section_data (s)->local_dynrel);
4931 p != NULL;
4932 p = p->next)
4933 {
4934 if (!bfd_is_abs_section (p->sec)
4935 && bfd_is_abs_section (p->sec->output_section))
4936 {
4937 /* Input section has been discarded, either because
4938 it is a copy of a linkonce section or due to
4939 linker script /DISCARD/, so we'll be discarding
4940 the relocs too. */
4941 }
4942 else if (p->count != 0)
4943 {
4944 elf_section_data (p->sec)->sreloc->size
4945 += p->count * sizeof (Elf32_External_Rela);
4946 if ((p->sec->output_section->flags
4947 & (SEC_READONLY | SEC_ALLOC))
4948 == (SEC_READONLY | SEC_ALLOC))
4949 info->flags |= DF_TEXTREL;
4950 }
4951 }
4952 }
4953
4954 local_got = elf_local_got_refcounts (ibfd);
4955 if (!local_got)
4956 continue;
4957
4958 symtab_hdr = &elf_symtab_hdr (ibfd);
4959 locsymcount = symtab_hdr->sh_info;
4960 end_local_got = local_got + locsymcount;
4961 lgot_masks = (char *) end_local_got;
4962 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4963 if (*local_got > 0)
4964 {
4965 if (*lgot_masks == (TLS_TLS | TLS_LD))
4966 {
4967 /* If just an LD reloc, we'll just use
4968 htab->tlsld_got.offset. */
4969 htab->tlsld_got.refcount += 1;
4970 *local_got = (bfd_vma) -1;
4971 }
4972 else
4973 {
4974 unsigned int need = 0;
4975 if ((*lgot_masks & TLS_TLS) != 0)
4976 {
4977 if ((*lgot_masks & TLS_GD) != 0)
4978 need += 8;
4979 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4980 need += 4;
4981 if ((*lgot_masks & TLS_DTPREL) != 0)
4982 need += 4;
4983 }
4984 else
4985 need += 4;
4986 *local_got = allocate_got (htab, need);
4987 if (info->shared)
4988 htab->relgot->size += (need
4989 * (sizeof (Elf32_External_Rela) / 4));
4990 }
4991 }
4992 else
4993 *local_got = (bfd_vma) -1;
4994 }
4995
4996 /* Allocate space for global sym dynamic relocs. */
4997 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4998
4999 if (htab->tlsld_got.refcount > 0)
5000 {
5001 htab->tlsld_got.offset = allocate_got (htab, 8);
5002 if (info->shared)
5003 htab->relgot->size += sizeof (Elf32_External_Rela);
5004 }
5005 else
5006 htab->tlsld_got.offset = (bfd_vma) -1;
5007
5008 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5009 {
5010 unsigned int g_o_t = 32768;
5011
5012 /* If we haven't allocated the header, do so now. When we get here,
5013 for old plt/got the got size will be 0 to 32764 (not allocated),
5014 or 32780 to 65536 (header allocated). For new plt/got, the
5015 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5016 if (htab->got->size <= 32768)
5017 {
5018 g_o_t = htab->got->size;
5019 if (htab->plt_type == PLT_OLD)
5020 g_o_t += 4;
5021 htab->got->size += htab->got_header_size;
5022 }
5023
5024 htab->elf.hgot->root.u.def.value = g_o_t;
5025 }
5026
5027 if (htab->glink != NULL && htab->glink->size != 0)
5028 {
5029 htab->glink_pltresolve = htab->glink->size;
5030 /* Space for the branch table. */
5031 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5032 /* Pad out to align the start of PLTresolve. */
5033 htab->glink->size += -htab->glink->size & 15;
5034 htab->glink->size += GLINK_PLTRESOLVE;
5035
5036 if (htab->emit_stub_syms)
5037 {
5038 struct elf_link_hash_entry *sh;
5039 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5040 TRUE, FALSE, FALSE);
5041 if (sh == NULL)
5042 return FALSE;
5043 if (sh->root.type == bfd_link_hash_new)
5044 {
5045 sh->root.type = bfd_link_hash_defined;
5046 sh->root.u.def.section = htab->glink;
5047 sh->root.u.def.value = htab->glink_pltresolve;
5048 sh->ref_regular = 1;
5049 sh->def_regular = 1;
5050 sh->ref_regular_nonweak = 1;
5051 sh->forced_local = 1;
5052 sh->non_elf = 0;
5053 }
5054 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5055 TRUE, FALSE, FALSE);
5056 if (sh == NULL)
5057 return FALSE;
5058 if (sh->root.type == bfd_link_hash_new)
5059 {
5060 sh->root.type = bfd_link_hash_defined;
5061 sh->root.u.def.section = htab->glink;
5062 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5063 sh->ref_regular = 1;
5064 sh->def_regular = 1;
5065 sh->ref_regular_nonweak = 1;
5066 sh->forced_local = 1;
5067 sh->non_elf = 0;
5068 }
5069 }
5070 }
5071
5072 /* We've now determined the sizes of the various dynamic sections.
5073 Allocate memory for them. */
5074 relocs = FALSE;
5075 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5076 {
5077 bfd_boolean strip_section = TRUE;
5078
5079 if ((s->flags & SEC_LINKER_CREATED) == 0)
5080 continue;
5081
5082 if (s == htab->plt
5083 || s == htab->glink
5084 || s == htab->got
5085 || s == htab->sgotplt
5086 || s == htab->sbss
5087 || s == htab->dynbss
5088 || s == htab->dynsbss)
5089 {
5090 /* We'd like to strip these sections if they aren't needed, but if
5091 we've exported dynamic symbols from them we must leave them.
5092 It's too late to tell BFD to get rid of the symbols. */
5093 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5094 strip_section = FALSE;
5095 /* Strip this section if we don't need it; see the
5096 comment below. */
5097 }
5098 else if (s == htab->sdata[0].section
5099 || s == htab->sdata[1].section)
5100 {
5101 /* Strip these too. */
5102 }
5103 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5104 {
5105 if (s->size != 0)
5106 {
5107 /* Remember whether there are any relocation sections. */
5108 relocs = TRUE;
5109
5110 /* We use the reloc_count field as a counter if we need
5111 to copy relocs into the output file. */
5112 s->reloc_count = 0;
5113 }
5114 }
5115 else
5116 {
5117 /* It's not one of our sections, so don't allocate space. */
5118 continue;
5119 }
5120
5121 if (s->size == 0 && strip_section)
5122 {
5123 /* If we don't need this section, strip it from the
5124 output file. This is mostly to handle .rela.bss and
5125 .rela.plt. We must create both sections in
5126 create_dynamic_sections, because they must be created
5127 before the linker maps input sections to output
5128 sections. The linker does that before
5129 adjust_dynamic_symbol is called, and it is that
5130 function which decides whether anything needs to go
5131 into these sections. */
5132 s->flags |= SEC_EXCLUDE;
5133 continue;
5134 }
5135
5136 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5137 continue;
5138
5139 /* Allocate memory for the section contents. */
5140 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5141 if (s->contents == NULL)
5142 return FALSE;
5143 }
5144
5145 if (htab->elf.dynamic_sections_created)
5146 {
5147 /* Add some entries to the .dynamic section. We fill in the
5148 values later, in ppc_elf_finish_dynamic_sections, but we
5149 must add the entries now so that we get the correct size for
5150 the .dynamic section. The DT_DEBUG entry is filled in by the
5151 dynamic linker and used by the debugger. */
5152 #define add_dynamic_entry(TAG, VAL) \
5153 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5154
5155 if (info->executable)
5156 {
5157 if (!add_dynamic_entry (DT_DEBUG, 0))
5158 return FALSE;
5159 }
5160
5161 if (htab->plt != NULL && htab->plt->size != 0)
5162 {
5163 if (!add_dynamic_entry (DT_PLTGOT, 0)
5164 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5165 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5166 || !add_dynamic_entry (DT_JMPREL, 0))
5167 return FALSE;
5168 }
5169
5170 if (htab->glink != NULL && htab->glink->size != 0)
5171 {
5172 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5173 return FALSE;
5174 }
5175
5176 if (relocs)
5177 {
5178 if (!add_dynamic_entry (DT_RELA, 0)
5179 || !add_dynamic_entry (DT_RELASZ, 0)
5180 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5181 return FALSE;
5182 }
5183
5184 /* If any dynamic relocs apply to a read-only section, then we
5185 need a DT_TEXTREL entry. */
5186 if ((info->flags & DF_TEXTREL) == 0)
5187 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5188 info);
5189
5190 if ((info->flags & DF_TEXTREL) != 0)
5191 {
5192 if (!add_dynamic_entry (DT_TEXTREL, 0))
5193 return FALSE;
5194 }
5195 if (htab->is_vxworks
5196 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5197 return FALSE;
5198 }
5199 #undef add_dynamic_entry
5200
5201 return TRUE;
5202 }
5203
5204 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5205
5206 static bfd_boolean
5207 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5208 {
5209 if (h->plt.plist != NULL
5210 && !h->def_regular
5211 && (!h->pointer_equality_needed
5212 || !h->ref_regular_nonweak))
5213 return FALSE;
5214
5215 return _bfd_elf_hash_symbol (h);
5216 }
5217 \f
5218 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5219
5220 static const int shared_stub_entry[] =
5221 {
5222 0x7c0802a6, /* mflr 0 */
5223 0x429f0005, /* bcl 20, 31, .Lxxx */
5224 0x7d6802a6, /* mflr 11 */
5225 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5226 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5227 0x7c0803a6, /* mtlr 0 */
5228 0x7d6903a6, /* mtctr 11 */
5229 0x4e800420, /* bctr */
5230 };
5231
5232 static const int stub_entry[] =
5233 {
5234 0x3d600000, /* lis 11,xxx@ha */
5235 0x396b0000, /* addi 11,11,xxx@l */
5236 0x7d6903a6, /* mtctr 11 */
5237 0x4e800420, /* bctr */
5238 };
5239
5240 static bfd_boolean
5241 ppc_elf_relax_section (bfd *abfd,
5242 asection *isec,
5243 struct bfd_link_info *link_info,
5244 bfd_boolean *again)
5245 {
5246 struct one_fixup
5247 {
5248 struct one_fixup *next;
5249 asection *tsec;
5250 bfd_vma toff;
5251 bfd_vma trampoff;
5252 };
5253
5254 Elf_Internal_Shdr *symtab_hdr;
5255 bfd_byte *contents = NULL;
5256 Elf_Internal_Sym *isymbuf = NULL;
5257 Elf_Internal_Rela *internal_relocs = NULL;
5258 Elf_Internal_Rela *irel, *irelend;
5259 struct one_fixup *fixups = NULL;
5260 bfd_boolean changed;
5261 struct ppc_elf_link_hash_table *htab;
5262 bfd_size_type trampoff;
5263 asection *got2;
5264
5265 *again = FALSE;
5266
5267 /* Nothing to do if there are no relocations, and no need to do
5268 anything with non-alloc sections. */
5269 if ((isec->flags & SEC_ALLOC) == 0
5270 || (isec->flags & SEC_RELOC) == 0
5271 || isec->reloc_count == 0)
5272 return TRUE;
5273
5274 trampoff = (isec->size + 3) & (bfd_vma) -4;
5275 /* Space for a branch around any trampolines. */
5276 trampoff += 4;
5277
5278 symtab_hdr = &elf_symtab_hdr (abfd);
5279
5280 /* Get a copy of the native relocations. */
5281 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5282 link_info->keep_memory);
5283 if (internal_relocs == NULL)
5284 goto error_return;
5285
5286 htab = ppc_elf_hash_table (link_info);
5287 got2 = bfd_get_section_by_name (abfd, ".got2");
5288
5289 irelend = internal_relocs + isec->reloc_count;
5290 for (irel = internal_relocs; irel < irelend; irel++)
5291 {
5292 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5293 bfd_vma symaddr, reladdr, toff, roff;
5294 asection *tsec;
5295 struct one_fixup *f;
5296 size_t insn_offset = 0;
5297 bfd_vma max_branch_offset, val;
5298 bfd_byte *hit_addr;
5299 unsigned long t0;
5300 unsigned char sym_type;
5301
5302 switch (r_type)
5303 {
5304 case R_PPC_REL24:
5305 case R_PPC_LOCAL24PC:
5306 case R_PPC_PLTREL24:
5307 max_branch_offset = 1 << 25;
5308 break;
5309
5310 case R_PPC_REL14:
5311 case R_PPC_REL14_BRTAKEN:
5312 case R_PPC_REL14_BRNTAKEN:
5313 max_branch_offset = 1 << 15;
5314 break;
5315
5316 default:
5317 continue;
5318 }
5319
5320 /* Get the value of the symbol referred to by the reloc. */
5321 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5322 {
5323 /* A local symbol. */
5324 Elf_Internal_Sym *isym;
5325
5326 /* Read this BFD's local symbols. */
5327 if (isymbuf == NULL)
5328 {
5329 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5330 if (isymbuf == NULL)
5331 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5332 symtab_hdr->sh_info, 0,
5333 NULL, NULL, NULL);
5334 if (isymbuf == 0)
5335 goto error_return;
5336 }
5337 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5338 if (isym->st_shndx == SHN_UNDEF)
5339 continue; /* We can't do anything with undefined symbols. */
5340 else if (isym->st_shndx == SHN_ABS)
5341 tsec = bfd_abs_section_ptr;
5342 else if (isym->st_shndx == SHN_COMMON)
5343 tsec = bfd_com_section_ptr;
5344 else
5345 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5346
5347 toff = isym->st_value;
5348 sym_type = ELF_ST_TYPE (isym->st_info);
5349 }
5350 else
5351 {
5352 /* Global symbol handling. */
5353 unsigned long indx;
5354 struct elf_link_hash_entry *h;
5355
5356 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5357 h = elf_sym_hashes (abfd)[indx];
5358
5359 while (h->root.type == bfd_link_hash_indirect
5360 || h->root.type == bfd_link_hash_warning)
5361 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5362
5363 tsec = NULL;
5364 toff = 0;
5365 if (r_type == R_PPC_PLTREL24
5366 && htab->plt != NULL)
5367 {
5368 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5369
5370 if (ent != NULL)
5371 {
5372 if (htab->plt_type == PLT_NEW)
5373 {
5374 tsec = htab->glink;
5375 toff = ent->glink_offset;
5376 }
5377 else
5378 {
5379 tsec = htab->plt;
5380 toff = ent->plt.offset;
5381 }
5382 }
5383 }
5384 if (tsec != NULL)
5385 ;
5386 else if (h->root.type == bfd_link_hash_defined
5387 || h->root.type == bfd_link_hash_defweak)
5388 {
5389 tsec = h->root.u.def.section;
5390 toff = h->root.u.def.value;
5391 }
5392 else
5393 continue;
5394
5395 sym_type = h->type;
5396 }
5397
5398 /* If the branch and target are in the same section, you have
5399 no hope of adding stubs. We'll error out later should the
5400 branch overflow. */
5401 if (tsec == isec)
5402 continue;
5403
5404 /* There probably isn't any reason to handle symbols in
5405 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5406 attribute for a code section, and we are only looking at
5407 branches. However, implement it correctly here as a
5408 reference for other target relax_section functions. */
5409 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5410 {
5411 /* At this stage in linking, no SEC_MERGE symbol has been
5412 adjusted, so all references to such symbols need to be
5413 passed through _bfd_merged_section_offset. (Later, in
5414 relocate_section, all SEC_MERGE symbols *except* for
5415 section symbols have been adjusted.)
5416
5417 gas may reduce relocations against symbols in SEC_MERGE
5418 sections to a relocation against the section symbol when
5419 the original addend was zero. When the reloc is against
5420 a section symbol we should include the addend in the
5421 offset passed to _bfd_merged_section_offset, since the
5422 location of interest is the original symbol. On the
5423 other hand, an access to "sym+addend" where "sym" is not
5424 a section symbol should not include the addend; Such an
5425 access is presumed to be an offset from "sym"; The
5426 location of interest is just "sym". */
5427 if (sym_type == STT_SECTION)
5428 toff += irel->r_addend;
5429
5430 toff = _bfd_merged_section_offset (abfd, &tsec,
5431 elf_section_data (tsec)->sec_info,
5432 toff);
5433
5434 if (sym_type != STT_SECTION)
5435 toff += irel->r_addend;
5436 }
5437 /* PLTREL24 addends are special. */
5438 else if (r_type != R_PPC_PLTREL24)
5439 toff += irel->r_addend;
5440
5441 /* Attempted -shared link of non-pic code loses. */
5442 if (tsec->output_section == NULL)
5443 continue;
5444
5445 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5446
5447 roff = irel->r_offset;
5448 reladdr = isec->output_section->vma + isec->output_offset + roff;
5449
5450 /* If the branch is in range, no need to do anything. */
5451 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5452 continue;
5453
5454 /* Look for an existing fixup to this address. */
5455 for (f = fixups; f ; f = f->next)
5456 if (f->tsec == tsec && f->toff == toff)
5457 break;
5458
5459 if (f == NULL)
5460 {
5461 size_t size;
5462 unsigned long stub_rtype;
5463
5464 val = trampoff - roff;
5465 if (val >= max_branch_offset)
5466 /* Oh dear, we can't reach a trampoline. Don't try to add
5467 one. We'll report an error later. */
5468 continue;
5469
5470 if (link_info->shared)
5471 {
5472 size = 4 * ARRAY_SIZE (shared_stub_entry);
5473 insn_offset = 12;
5474 stub_rtype = R_PPC_RELAX32PC;
5475 }
5476 else
5477 {
5478 size = 4 * ARRAY_SIZE (stub_entry);
5479 insn_offset = 0;
5480 stub_rtype = R_PPC_RELAX32;
5481 }
5482
5483 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5484 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5485 abort ();
5486 if (tsec == htab->plt
5487 || tsec == htab->glink)
5488 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5489
5490 /* Hijack the old relocation. Since we need two
5491 relocations for this use a "composite" reloc. */
5492 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5493 stub_rtype);
5494 irel->r_offset = trampoff + insn_offset;
5495
5496 /* Record the fixup so we don't do it again this section. */
5497 f = bfd_malloc (sizeof (*f));
5498 f->next = fixups;
5499 f->tsec = tsec;
5500 f->toff = toff;
5501 f->trampoff = trampoff;
5502 fixups = f;
5503
5504 trampoff += size;
5505 }
5506 else
5507 {
5508 val = f->trampoff - roff;
5509 if (val >= max_branch_offset)
5510 continue;
5511
5512 /* Nop out the reloc, since we're finalizing things here. */
5513 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5514 }
5515
5516 /* Get the section contents. */
5517 if (contents == NULL)
5518 {
5519 /* Get cached copy if it exists. */
5520 if (elf_section_data (isec)->this_hdr.contents != NULL)
5521 contents = elf_section_data (isec)->this_hdr.contents;
5522 else
5523 {
5524 /* Go get them off disk. */
5525 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5526 goto error_return;
5527 }
5528 }
5529
5530 /* Fix up the existing branch to hit the trampoline. */
5531 hit_addr = contents + roff;
5532 switch (r_type)
5533 {
5534 case R_PPC_REL24:
5535 case R_PPC_LOCAL24PC:
5536 case R_PPC_PLTREL24:
5537 t0 = bfd_get_32 (abfd, hit_addr);
5538 t0 &= ~0x3fffffc;
5539 t0 |= val & 0x3fffffc;
5540 bfd_put_32 (abfd, t0, hit_addr);
5541 break;
5542
5543 case R_PPC_REL14:
5544 case R_PPC_REL14_BRTAKEN:
5545 case R_PPC_REL14_BRNTAKEN:
5546 t0 = bfd_get_32 (abfd, hit_addr);
5547 t0 &= ~0xfffc;
5548 t0 |= val & 0xfffc;
5549 bfd_put_32 (abfd, t0, hit_addr);
5550 break;
5551 }
5552 }
5553
5554 /* Write out the trampolines. */
5555 changed = fixups != NULL;
5556 if (fixups != NULL)
5557 {
5558 const int *stub;
5559 bfd_byte *dest;
5560 bfd_vma val;
5561 int i, size;
5562
5563 do
5564 {
5565 struct one_fixup *f = fixups;
5566 fixups = fixups->next;
5567 free (f);
5568 }
5569 while (fixups);
5570
5571 contents = bfd_realloc_or_free (contents, trampoff);
5572 if (contents == NULL)
5573 goto error_return;
5574
5575 isec->size = (isec->size + 3) & (bfd_vma) -4;
5576 /* Branch around the trampolines. */
5577 val = trampoff - isec->size + 0x48000000;
5578 dest = contents + isec->size;
5579 isec->size = trampoff;
5580 bfd_put_32 (abfd, val, dest);
5581 dest += 4;
5582
5583 if (link_info->shared)
5584 {
5585 stub = shared_stub_entry;
5586 size = ARRAY_SIZE (shared_stub_entry);
5587 }
5588 else
5589 {
5590 stub = stub_entry;
5591 size = ARRAY_SIZE (stub_entry);
5592 }
5593
5594 i = 0;
5595 while (dest < contents + trampoff)
5596 {
5597 bfd_put_32 (abfd, stub[i], dest);
5598 i++;
5599 if (i == size)
5600 i = 0;
5601 dest += 4;
5602 }
5603 BFD_ASSERT (i == 0);
5604 }
5605
5606 if (isymbuf != NULL
5607 && symtab_hdr->contents != (unsigned char *) isymbuf)
5608 {
5609 if (! link_info->keep_memory)
5610 free (isymbuf);
5611 else
5612 {
5613 /* Cache the symbols for elf_link_input_bfd. */
5614 symtab_hdr->contents = (unsigned char *) isymbuf;
5615 }
5616 }
5617
5618 if (contents != NULL
5619 && elf_section_data (isec)->this_hdr.contents != contents)
5620 {
5621 if (!changed && !link_info->keep_memory)
5622 free (contents);
5623 else
5624 {
5625 /* Cache the section contents for elf_link_input_bfd. */
5626 elf_section_data (isec)->this_hdr.contents = contents;
5627 }
5628 }
5629
5630 if (elf_section_data (isec)->relocs != internal_relocs)
5631 {
5632 if (!changed)
5633 free (internal_relocs);
5634 else
5635 elf_section_data (isec)->relocs = internal_relocs;
5636 }
5637
5638 *again = changed;
5639 return TRUE;
5640
5641 error_return:
5642 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5643 free (isymbuf);
5644 if (contents != NULL
5645 && elf_section_data (isec)->this_hdr.contents != contents)
5646 free (contents);
5647 if (internal_relocs != NULL
5648 && elf_section_data (isec)->relocs != internal_relocs)
5649 free (internal_relocs);
5650 return FALSE;
5651 }
5652 \f
5653 /* What to do when ld finds relocations against symbols defined in
5654 discarded sections. */
5655
5656 static unsigned int
5657 ppc_elf_action_discarded (asection *sec)
5658 {
5659 if (strcmp (".fixup", sec->name) == 0)
5660 return 0;
5661
5662 if (strcmp (".got2", sec->name) == 0)
5663 return 0;
5664
5665 return _bfd_elf_default_action_discarded (sec);
5666 }
5667 \f
5668 /* Fill in the address for a pointer generated in a linker section. */
5669
5670 static bfd_vma
5671 elf_finish_pointer_linker_section (bfd *input_bfd,
5672 elf_linker_section_t *lsect,
5673 struct elf_link_hash_entry *h,
5674 bfd_vma relocation,
5675 const Elf_Internal_Rela *rel)
5676 {
5677 elf_linker_section_pointers_t *linker_section_ptr;
5678
5679 BFD_ASSERT (lsect != NULL);
5680
5681 if (h != NULL)
5682 {
5683 /* Handle global symbol. */
5684 struct ppc_elf_link_hash_entry *eh;
5685
5686 eh = (struct ppc_elf_link_hash_entry *) h;
5687 BFD_ASSERT (eh->elf.def_regular);
5688 linker_section_ptr = eh->linker_section_pointer;
5689 }
5690 else
5691 {
5692 /* Handle local symbol. */
5693 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5694
5695 BFD_ASSERT (is_ppc_elf (input_bfd));
5696 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5697 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5698 }
5699
5700 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5701 rel->r_addend,
5702 lsect);
5703 BFD_ASSERT (linker_section_ptr != NULL);
5704
5705 /* Offset will always be a multiple of four, so use the bottom bit
5706 as a "written" flag. */
5707 if ((linker_section_ptr->offset & 1) == 0)
5708 {
5709 bfd_put_32 (lsect->section->owner,
5710 relocation + linker_section_ptr->addend,
5711 lsect->section->contents + linker_section_ptr->offset);
5712 linker_section_ptr->offset += 1;
5713 }
5714
5715 relocation = (lsect->section->output_offset
5716 + linker_section_ptr->offset - 1
5717 - 0x8000);
5718
5719 #ifdef DEBUG
5720 fprintf (stderr,
5721 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5722 lsect->name, (long) relocation, (long) relocation);
5723 #endif
5724
5725 /* Subtract out the addend, because it will get added back in by the normal
5726 processing. */
5727 return relocation - linker_section_ptr->addend;
5728 }
5729
5730 /* The RELOCATE_SECTION function is called by the ELF backend linker
5731 to handle the relocations for a section.
5732
5733 The relocs are always passed as Rela structures; if the section
5734 actually uses Rel structures, the r_addend field will always be
5735 zero.
5736
5737 This function is responsible for adjust the section contents as
5738 necessary, and (if using Rela relocs and generating a
5739 relocatable output file) adjusting the reloc addend as
5740 necessary.
5741
5742 This function does not have to worry about setting the reloc
5743 address or the reloc symbol index.
5744
5745 LOCAL_SYMS is a pointer to the swapped in local symbols.
5746
5747 LOCAL_SECTIONS is an array giving the section in the input file
5748 corresponding to the st_shndx field of each local symbol.
5749
5750 The global hash table entry for the global symbols can be found
5751 via elf_sym_hashes (input_bfd).
5752
5753 When generating relocatable output, this function must handle
5754 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5755 going to be the section symbol corresponding to the output
5756 section, which means that the addend must be adjusted
5757 accordingly. */
5758
5759 static bfd_boolean
5760 ppc_elf_relocate_section (bfd *output_bfd,
5761 struct bfd_link_info *info,
5762 bfd *input_bfd,
5763 asection *input_section,
5764 bfd_byte *contents,
5765 Elf_Internal_Rela *relocs,
5766 Elf_Internal_Sym *local_syms,
5767 asection **local_sections)
5768 {
5769 Elf_Internal_Shdr *symtab_hdr;
5770 struct elf_link_hash_entry **sym_hashes;
5771 struct ppc_elf_link_hash_table *htab;
5772 Elf_Internal_Rela *rel;
5773 Elf_Internal_Rela *relend;
5774 Elf_Internal_Rela outrel;
5775 bfd_byte *loc;
5776 asection *got2, *sreloc = NULL;
5777 bfd_vma *local_got_offsets;
5778 bfd_boolean ret = TRUE;
5779 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5780
5781 #ifdef DEBUG
5782 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5783 "%ld relocations%s",
5784 input_bfd, input_section,
5785 (long) input_section->reloc_count,
5786 (info->relocatable) ? " (relocatable)" : "");
5787 #endif
5788
5789 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5790
5791 /* Initialize howto table if not already done. */
5792 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5793 ppc_elf_howto_init ();
5794
5795 htab = ppc_elf_hash_table (info);
5796 local_got_offsets = elf_local_got_offsets (input_bfd);
5797 symtab_hdr = &elf_symtab_hdr (input_bfd);
5798 sym_hashes = elf_sym_hashes (input_bfd);
5799 rel = relocs;
5800 relend = relocs + input_section->reloc_count;
5801 for (; rel < relend; rel++)
5802 {
5803 enum elf_ppc_reloc_type r_type;
5804 bfd_vma addend;
5805 bfd_reloc_status_type r;
5806 Elf_Internal_Sym *sym;
5807 asection *sec;
5808 struct elf_link_hash_entry *h;
5809 const char *sym_name;
5810 reloc_howto_type *howto;
5811 unsigned long r_symndx;
5812 bfd_vma relocation;
5813 bfd_vma branch_bit, insn, from;
5814 bfd_boolean unresolved_reloc;
5815 bfd_boolean warned;
5816 unsigned int tls_type, tls_mask, tls_gd;
5817
5818 r_type = ELF32_R_TYPE (rel->r_info);
5819 sym = NULL;
5820 sec = NULL;
5821 h = NULL;
5822 unresolved_reloc = FALSE;
5823 warned = FALSE;
5824 r_symndx = ELF32_R_SYM (rel->r_info);
5825
5826 if (r_symndx < symtab_hdr->sh_info)
5827 {
5828 sym = local_syms + r_symndx;
5829 sec = local_sections[r_symndx];
5830 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5831
5832 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5833 }
5834 else
5835 {
5836 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5837 r_symndx, symtab_hdr, sym_hashes,
5838 h, sec, relocation,
5839 unresolved_reloc, warned);
5840
5841 sym_name = h->root.root.string;
5842 }
5843
5844 if (sec != NULL && elf_discarded_section (sec))
5845 {
5846 /* For relocs against symbols from removed linkonce sections,
5847 or sections discarded by a linker script, we just want the
5848 section contents zeroed. Avoid any special processing. */
5849 howto = NULL;
5850 if (r_type < R_PPC_max)
5851 howto = ppc_elf_howto_table[r_type];
5852 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5853 rel->r_info = 0;
5854 rel->r_addend = 0;
5855 continue;
5856 }
5857
5858 if (info->relocatable)
5859 {
5860 if (got2 != NULL
5861 && r_type == R_PPC_PLTREL24
5862 && rel->r_addend >= 32768)
5863 {
5864 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5865 addend specifies the GOT pointer offset within .got2. */
5866 rel->r_addend += got2->output_offset;
5867 }
5868 continue;
5869 }
5870
5871 /* TLS optimizations. Replace instruction sequences and relocs
5872 based on information we collected in tls_optimize. We edit
5873 RELOCS so that --emit-relocs will output something sensible
5874 for the final instruction stream. */
5875 tls_mask = 0;
5876 tls_gd = 0;
5877 if (IS_PPC_TLS_RELOC (r_type))
5878 {
5879 if (h != NULL)
5880 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5881 else if (local_got_offsets != NULL)
5882 {
5883 char *lgot_masks;
5884 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5885 tls_mask = lgot_masks[r_symndx];
5886 }
5887 }
5888
5889 /* Ensure reloc mapping code below stays sane. */
5890 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5891 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5892 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5893 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5894 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5895 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5896 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5897 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5898 abort ();
5899 switch (r_type)
5900 {
5901 default:
5902 break;
5903
5904 case R_PPC_GOT_TPREL16:
5905 case R_PPC_GOT_TPREL16_LO:
5906 if (tls_mask != 0
5907 && (tls_mask & TLS_TPREL) == 0)
5908 {
5909 bfd_vma insn;
5910 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5911 insn &= 31 << 21;
5912 insn |= 0x3c020000; /* addis 0,2,0 */
5913 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5914 r_type = R_PPC_TPREL16_HA;
5915 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5916 }
5917 break;
5918
5919 case R_PPC_TLS:
5920 if (tls_mask != 0
5921 && (tls_mask & TLS_TPREL) == 0)
5922 {
5923 bfd_vma insn, rtra;
5924 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5925 if ((insn & ((31 << 26) | (31 << 11)))
5926 == ((31 << 26) | (2 << 11)))
5927 rtra = insn & ((1 << 26) - (1 << 16));
5928 else if ((insn & ((31 << 26) | (31 << 16)))
5929 == ((31 << 26) | (2 << 16)))
5930 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5931 else
5932 abort ();
5933 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5934 /* add -> addi. */
5935 insn = 14 << 26;
5936 else if ((insn & (31 << 1)) == 23 << 1
5937 && ((insn & (31 << 6)) < 14 << 6
5938 || ((insn & (31 << 6)) >= 16 << 6
5939 && (insn & (31 << 6)) < 24 << 6)))
5940 /* load and store indexed -> dform. */
5941 insn = (32 | ((insn >> 6) & 31)) << 26;
5942 else if ((insn & (31 << 1)) == 21 << 1
5943 && (insn & (0x1a << 6)) == 0)
5944 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5945 insn = (((58 | ((insn >> 6) & 4)) << 26)
5946 | ((insn >> 6) & 1));
5947 else if ((insn & (31 << 1)) == 21 << 1
5948 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5949 /* lwax -> lwa. */
5950 insn = (58 << 26) | 2;
5951 else
5952 abort ();
5953 insn |= rtra;
5954 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5955 r_type = R_PPC_TPREL16_LO;
5956 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5957
5958 /* Was PPC_TLS which sits on insn boundary, now
5959 PPC_TPREL16_LO which is at low-order half-word. */
5960 rel->r_offset += d_offset;
5961 }
5962 break;
5963
5964 case R_PPC_GOT_TLSGD16_HI:
5965 case R_PPC_GOT_TLSGD16_HA:
5966 tls_gd = TLS_TPRELGD;
5967 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5968 goto tls_gdld_hi;
5969 break;
5970
5971 case R_PPC_GOT_TLSLD16_HI:
5972 case R_PPC_GOT_TLSLD16_HA:
5973 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5974 {
5975 tls_gdld_hi:
5976 if ((tls_mask & tls_gd) != 0)
5977 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5978 + R_PPC_GOT_TPREL16);
5979 else
5980 {
5981 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5982 rel->r_offset -= d_offset;
5983 r_type = R_PPC_NONE;
5984 }
5985 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5986 }
5987 break;
5988
5989 case R_PPC_GOT_TLSGD16:
5990 case R_PPC_GOT_TLSGD16_LO:
5991 tls_gd = TLS_TPRELGD;
5992 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5993 goto tls_ldgd_opt;
5994 break;
5995
5996 case R_PPC_GOT_TLSLD16:
5997 case R_PPC_GOT_TLSLD16_LO:
5998 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5999 {
6000 bfd_vma insn1, insn2;
6001 bfd_vma offset;
6002
6003 tls_ldgd_opt:
6004 offset = rel[1].r_offset;
6005 insn1 = bfd_get_32 (output_bfd,
6006 contents + rel->r_offset - d_offset);
6007 if ((tls_mask & tls_gd) != 0)
6008 {
6009 /* IE */
6010 insn1 &= (1 << 26) - 1;
6011 insn1 |= 32 << 26; /* lwz */
6012 insn2 = 0x7c631214; /* add 3,3,2 */
6013 rel[1].r_info
6014 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6015 rel[1].r_addend = 0;
6016 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6017 + R_PPC_GOT_TPREL16);
6018 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6019 }
6020 else
6021 {
6022 /* LE */
6023 insn1 = 0x3c620000; /* addis 3,2,0 */
6024 insn2 = 0x38630000; /* addi 3,3,0 */
6025 if (tls_gd == 0)
6026 {
6027 /* Was an LD reloc. */
6028 r_symndx = 0;
6029 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6030 }
6031 r_type = R_PPC_TPREL16_HA;
6032 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6033 rel[1].r_info = ELF32_R_INFO (r_symndx,
6034 R_PPC_TPREL16_LO);
6035 rel[1].r_offset += d_offset;
6036 rel[1].r_addend = rel->r_addend;
6037 }
6038 bfd_put_32 (output_bfd, insn1,
6039 contents + rel->r_offset - d_offset);
6040 bfd_put_32 (output_bfd, insn2, contents + offset);
6041 if (tls_gd == 0)
6042 {
6043 /* We changed the symbol on an LD reloc. Start over
6044 in order to get h, sym, sec etc. right. */
6045 rel--;
6046 continue;
6047 }
6048 }
6049 break;
6050 }
6051
6052 /* Handle other relocations that tweak non-addend part of insn. */
6053 branch_bit = 0;
6054 switch (r_type)
6055 {
6056 default:
6057 break;
6058
6059 /* Branch taken prediction relocations. */
6060 case R_PPC_ADDR14_BRTAKEN:
6061 case R_PPC_REL14_BRTAKEN:
6062 branch_bit = BRANCH_PREDICT_BIT;
6063 /* Fall thru */
6064
6065 /* Branch not taken prediction relocations. */
6066 case R_PPC_ADDR14_BRNTAKEN:
6067 case R_PPC_REL14_BRNTAKEN:
6068 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6069 insn &= ~BRANCH_PREDICT_BIT;
6070 insn |= branch_bit;
6071
6072 from = (rel->r_offset
6073 + input_section->output_offset
6074 + input_section->output_section->vma);
6075
6076 /* Invert 'y' bit if not the default. */
6077 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6078 insn ^= BRANCH_PREDICT_BIT;
6079
6080 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6081 break;
6082 }
6083
6084 addend = rel->r_addend;
6085 tls_type = 0;
6086 howto = NULL;
6087 if (r_type < R_PPC_max)
6088 howto = ppc_elf_howto_table[r_type];
6089 switch (r_type)
6090 {
6091 default:
6092 (*_bfd_error_handler)
6093 (_("%B: unknown relocation type %d for symbol %s"),
6094 input_bfd, (int) r_type, sym_name);
6095
6096 bfd_set_error (bfd_error_bad_value);
6097 ret = FALSE;
6098 continue;
6099
6100 case R_PPC_NONE:
6101 case R_PPC_TLS:
6102 case R_PPC_EMB_MRKREF:
6103 case R_PPC_GNU_VTINHERIT:
6104 case R_PPC_GNU_VTENTRY:
6105 continue;
6106
6107 /* GOT16 relocations. Like an ADDR16 using the symbol's
6108 address in the GOT as relocation value instead of the
6109 symbol's value itself. Also, create a GOT entry for the
6110 symbol and put the symbol value there. */
6111 case R_PPC_GOT_TLSGD16:
6112 case R_PPC_GOT_TLSGD16_LO:
6113 case R_PPC_GOT_TLSGD16_HI:
6114 case R_PPC_GOT_TLSGD16_HA:
6115 tls_type = TLS_TLS | TLS_GD;
6116 goto dogot;
6117
6118 case R_PPC_GOT_TLSLD16:
6119 case R_PPC_GOT_TLSLD16_LO:
6120 case R_PPC_GOT_TLSLD16_HI:
6121 case R_PPC_GOT_TLSLD16_HA:
6122 tls_type = TLS_TLS | TLS_LD;
6123 goto dogot;
6124
6125 case R_PPC_GOT_TPREL16:
6126 case R_PPC_GOT_TPREL16_LO:
6127 case R_PPC_GOT_TPREL16_HI:
6128 case R_PPC_GOT_TPREL16_HA:
6129 tls_type = TLS_TLS | TLS_TPREL;
6130 goto dogot;
6131
6132 case R_PPC_GOT_DTPREL16:
6133 case R_PPC_GOT_DTPREL16_LO:
6134 case R_PPC_GOT_DTPREL16_HI:
6135 case R_PPC_GOT_DTPREL16_HA:
6136 tls_type = TLS_TLS | TLS_DTPREL;
6137 goto dogot;
6138
6139 case R_PPC_GOT16:
6140 case R_PPC_GOT16_LO:
6141 case R_PPC_GOT16_HI:
6142 case R_PPC_GOT16_HA:
6143 dogot:
6144 {
6145 /* Relocation is to the entry for this symbol in the global
6146 offset table. */
6147 bfd_vma off;
6148 bfd_vma *offp;
6149 unsigned long indx;
6150
6151 if (htab->got == NULL)
6152 abort ();
6153
6154 indx = 0;
6155 if (tls_type == (TLS_TLS | TLS_LD)
6156 && (h == NULL
6157 || !h->def_dynamic))
6158 offp = &htab->tlsld_got.offset;
6159 else if (h != NULL)
6160 {
6161 bfd_boolean dyn;
6162 dyn = htab->elf.dynamic_sections_created;
6163 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6164 || (info->shared
6165 && SYMBOL_REFERENCES_LOCAL (info, h)))
6166 /* This is actually a static link, or it is a
6167 -Bsymbolic link and the symbol is defined
6168 locally, or the symbol was forced to be local
6169 because of a version file. */
6170 ;
6171 else
6172 {
6173 indx = h->dynindx;
6174 unresolved_reloc = FALSE;
6175 }
6176 offp = &h->got.offset;
6177 }
6178 else
6179 {
6180 if (local_got_offsets == NULL)
6181 abort ();
6182 offp = &local_got_offsets[r_symndx];
6183 }
6184
6185 /* The offset must always be a multiple of 4. We use the
6186 least significant bit to record whether we have already
6187 processed this entry. */
6188 off = *offp;
6189 if ((off & 1) != 0)
6190 off &= ~1;
6191 else
6192 {
6193 unsigned int tls_m = (tls_mask
6194 & (TLS_LD | TLS_GD | TLS_DTPREL
6195 | TLS_TPREL | TLS_TPRELGD));
6196
6197 if (offp == &htab->tlsld_got.offset)
6198 tls_m = TLS_LD;
6199 else if (h == NULL
6200 || !h->def_dynamic)
6201 tls_m &= ~TLS_LD;
6202
6203 /* We might have multiple got entries for this sym.
6204 Initialize them all. */
6205 do
6206 {
6207 int tls_ty = 0;
6208
6209 if ((tls_m & TLS_LD) != 0)
6210 {
6211 tls_ty = TLS_TLS | TLS_LD;
6212 tls_m &= ~TLS_LD;
6213 }
6214 else if ((tls_m & TLS_GD) != 0)
6215 {
6216 tls_ty = TLS_TLS | TLS_GD;
6217 tls_m &= ~TLS_GD;
6218 }
6219 else if ((tls_m & TLS_DTPREL) != 0)
6220 {
6221 tls_ty = TLS_TLS | TLS_DTPREL;
6222 tls_m &= ~TLS_DTPREL;
6223 }
6224 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6225 {
6226 tls_ty = TLS_TLS | TLS_TPREL;
6227 tls_m = 0;
6228 }
6229
6230 /* Generate relocs for the dynamic linker. */
6231 if ((info->shared || indx != 0)
6232 && (h == NULL
6233 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6234 || h->root.type != bfd_link_hash_undefweak))
6235 {
6236 outrel.r_offset = (htab->got->output_section->vma
6237 + htab->got->output_offset
6238 + off);
6239 outrel.r_addend = 0;
6240 if (tls_ty & (TLS_LD | TLS_GD))
6241 {
6242 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6243 if (tls_ty == (TLS_TLS | TLS_GD))
6244 {
6245 loc = htab->relgot->contents;
6246 loc += (htab->relgot->reloc_count++
6247 * sizeof (Elf32_External_Rela));
6248 bfd_elf32_swap_reloca_out (output_bfd,
6249 &outrel, loc);
6250 outrel.r_offset += 4;
6251 outrel.r_info
6252 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6253 }
6254 }
6255 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6256 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6257 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6258 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6259 else if (indx == 0)
6260 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6261 else
6262 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6263 if (indx == 0)
6264 {
6265 outrel.r_addend += relocation;
6266 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6267 outrel.r_addend -= htab->elf.tls_sec->vma;
6268 }
6269 loc = htab->relgot->contents;
6270 loc += (htab->relgot->reloc_count++
6271 * sizeof (Elf32_External_Rela));
6272 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6273 }
6274
6275 /* Init the .got section contents if we're not
6276 emitting a reloc. */
6277 else
6278 {
6279 bfd_vma value = relocation;
6280
6281 if (tls_ty == (TLS_TLS | TLS_LD))
6282 value = 1;
6283 else if (tls_ty != 0)
6284 {
6285 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6286 if (tls_ty == (TLS_TLS | TLS_TPREL))
6287 value += DTP_OFFSET - TP_OFFSET;
6288
6289 if (tls_ty == (TLS_TLS | TLS_GD))
6290 {
6291 bfd_put_32 (output_bfd, value,
6292 htab->got->contents + off + 4);
6293 value = 1;
6294 }
6295 }
6296 bfd_put_32 (output_bfd, value,
6297 htab->got->contents + off);
6298 }
6299
6300 off += 4;
6301 if (tls_ty & (TLS_LD | TLS_GD))
6302 off += 4;
6303 }
6304 while (tls_m != 0);
6305
6306 off = *offp;
6307 *offp = off | 1;
6308 }
6309
6310 if (off >= (bfd_vma) -2)
6311 abort ();
6312
6313 if ((tls_type & TLS_TLS) != 0)
6314 {
6315 if (tls_type != (TLS_TLS | TLS_LD))
6316 {
6317 if ((tls_mask & TLS_LD) != 0
6318 && !(h == NULL
6319 || !h->def_dynamic))
6320 off += 8;
6321 if (tls_type != (TLS_TLS | TLS_GD))
6322 {
6323 if ((tls_mask & TLS_GD) != 0)
6324 off += 8;
6325 if (tls_type != (TLS_TLS | TLS_DTPREL))
6326 {
6327 if ((tls_mask & TLS_DTPREL) != 0)
6328 off += 4;
6329 }
6330 }
6331 }
6332 }
6333
6334 relocation = htab->got->output_offset + off;
6335 relocation -= htab->elf.hgot->root.u.def.value;
6336
6337 /* Addends on got relocations don't make much sense.
6338 x+off@got is actually x@got+off, and since the got is
6339 generated by a hash table traversal, the value in the
6340 got at entry m+n bears little relation to the entry m. */
6341 if (addend != 0)
6342 (*_bfd_error_handler)
6343 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6344 input_bfd,
6345 input_section,
6346 (long) rel->r_offset,
6347 howto->name,
6348 sym_name);
6349 }
6350 break;
6351
6352 /* Relocations that need no special processing. */
6353 case R_PPC_LOCAL24PC:
6354 /* It makes no sense to point a local relocation
6355 at a symbol not in this object. */
6356 if (unresolved_reloc)
6357 {
6358 if (! (*info->callbacks->undefined_symbol) (info,
6359 h->root.root.string,
6360 input_bfd,
6361 input_section,
6362 rel->r_offset,
6363 TRUE))
6364 return FALSE;
6365 continue;
6366 }
6367 break;
6368
6369 case R_PPC_DTPREL16:
6370 case R_PPC_DTPREL16_LO:
6371 case R_PPC_DTPREL16_HI:
6372 case R_PPC_DTPREL16_HA:
6373 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6374 break;
6375
6376 /* Relocations that may need to be propagated if this is a shared
6377 object. */
6378 case R_PPC_TPREL16:
6379 case R_PPC_TPREL16_LO:
6380 case R_PPC_TPREL16_HI:
6381 case R_PPC_TPREL16_HA:
6382 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6383 /* The TPREL16 relocs shouldn't really be used in shared
6384 libs as they will result in DT_TEXTREL being set, but
6385 support them anyway. */
6386 goto dodyn;
6387
6388 case R_PPC_TPREL32:
6389 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6390 goto dodyn;
6391
6392 case R_PPC_DTPREL32:
6393 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6394 goto dodyn;
6395
6396 case R_PPC_DTPMOD32:
6397 relocation = 1;
6398 addend = 0;
6399 goto dodyn;
6400
6401 case R_PPC_REL16:
6402 case R_PPC_REL16_LO:
6403 case R_PPC_REL16_HI:
6404 case R_PPC_REL16_HA:
6405 break;
6406
6407 case R_PPC_REL24:
6408 case R_PPC_REL32:
6409 case R_PPC_REL14:
6410 case R_PPC_REL14_BRTAKEN:
6411 case R_PPC_REL14_BRNTAKEN:
6412 /* If these relocations are not to a named symbol, they can be
6413 handled right here, no need to bother the dynamic linker. */
6414 if (SYMBOL_REFERENCES_LOCAL (info, h)
6415 || h == htab->elf.hgot)
6416 break;
6417 /* fall through */
6418
6419 /* Relocations that always need to be propagated if this is a shared
6420 object. */
6421 case R_PPC_ADDR32:
6422 case R_PPC_ADDR24:
6423 case R_PPC_ADDR16:
6424 case R_PPC_ADDR16_LO:
6425 case R_PPC_ADDR16_HI:
6426 case R_PPC_ADDR16_HA:
6427 case R_PPC_ADDR14:
6428 case R_PPC_ADDR14_BRTAKEN:
6429 case R_PPC_ADDR14_BRNTAKEN:
6430 case R_PPC_UADDR32:
6431 case R_PPC_UADDR16:
6432 dodyn:
6433 if ((input_section->flags & SEC_ALLOC) == 0)
6434 break;
6435 /* Fall thru. */
6436
6437 if ((info->shared
6438 && (h == NULL
6439 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6440 || h->root.type != bfd_link_hash_undefweak)
6441 && (MUST_BE_DYN_RELOC (r_type)
6442 || !SYMBOL_CALLS_LOCAL (info, h)))
6443 || (ELIMINATE_COPY_RELOCS
6444 && !info->shared
6445 && h != NULL
6446 && h->dynindx != -1
6447 && !h->non_got_ref
6448 && h->def_dynamic
6449 && !h->def_regular))
6450 {
6451 int skip;
6452
6453 #ifdef DEBUG
6454 fprintf (stderr, "ppc_elf_relocate_section needs to "
6455 "create relocation for %s\n",
6456 (h && h->root.root.string
6457 ? h->root.root.string : "<unknown>"));
6458 #endif
6459
6460 /* When generating a shared object, these relocations
6461 are copied into the output file to be resolved at run
6462 time. */
6463 if (sreloc == NULL)
6464 {
6465 const char *name;
6466
6467 name = (bfd_elf_string_from_elf_section
6468 (input_bfd,
6469 elf_elfheader (input_bfd)->e_shstrndx,
6470 elf_section_data (input_section)->rel_hdr.sh_name));
6471 if (name == NULL)
6472 return FALSE;
6473
6474 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6475 && strcmp (bfd_get_section_name (input_bfd,
6476 input_section),
6477 name + 5) == 0);
6478
6479 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6480 BFD_ASSERT (sreloc != NULL);
6481 }
6482
6483 skip = 0;
6484
6485 outrel.r_offset =
6486 _bfd_elf_section_offset (output_bfd, info, input_section,
6487 rel->r_offset);
6488 if (outrel.r_offset == (bfd_vma) -1
6489 || outrel.r_offset == (bfd_vma) -2)
6490 skip = (int) outrel.r_offset;
6491 outrel.r_offset += (input_section->output_section->vma
6492 + input_section->output_offset);
6493
6494 if (skip)
6495 memset (&outrel, 0, sizeof outrel);
6496 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6497 {
6498 unresolved_reloc = FALSE;
6499 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6500 outrel.r_addend = rel->r_addend;
6501 }
6502 else
6503 {
6504 outrel.r_addend = relocation + rel->r_addend;
6505
6506 if (r_type == R_PPC_ADDR32)
6507 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6508 else
6509 {
6510 long indx;
6511
6512 if (bfd_is_abs_section (sec))
6513 indx = 0;
6514 else if (sec == NULL || sec->owner == NULL)
6515 {
6516 bfd_set_error (bfd_error_bad_value);
6517 return FALSE;
6518 }
6519 else
6520 {
6521 asection *osec;
6522
6523 /* We are turning this relocation into one
6524 against a section symbol. It would be
6525 proper to subtract the symbol's value,
6526 osec->vma, from the emitted reloc addend,
6527 but ld.so expects buggy relocs. */
6528 osec = sec->output_section;
6529 indx = elf_section_data (osec)->dynindx;
6530 if (indx == 0)
6531 {
6532 osec = htab->elf.text_index_section;
6533 indx = elf_section_data (osec)->dynindx;
6534 }
6535 BFD_ASSERT (indx != 0);
6536 #ifdef DEBUG
6537 if (indx == 0)
6538 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6539 indx, osec->name, osec->flags,
6540 h->root.root.string);
6541 #endif
6542 }
6543
6544 outrel.r_info = ELF32_R_INFO (indx, r_type);
6545 }
6546 }
6547
6548 loc = sreloc->contents;
6549 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6550 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6551
6552 if (skip == -1)
6553 continue;
6554
6555 /* This reloc will be computed at runtime. We clear the memory
6556 so that it contains predictable value. */
6557 if (! skip
6558 && ((input_section->flags & SEC_ALLOC) != 0
6559 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6560 {
6561 relocation = howto->pc_relative ? outrel.r_offset : 0;
6562 addend = 0;
6563 break;
6564 }
6565 }
6566 break;
6567
6568 case R_PPC_RELAX32PC_PLT:
6569 case R_PPC_RELAX32_PLT:
6570 {
6571 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6572
6573 if (htab->plt_type == PLT_NEW)
6574 relocation = (htab->glink->output_section->vma
6575 + htab->glink->output_offset
6576 + ent->glink_offset);
6577 else
6578 relocation = (htab->plt->output_section->vma
6579 + htab->plt->output_offset
6580 + ent->plt.offset);
6581 addend = 0;
6582 }
6583 if (r_type == R_PPC_RELAX32_PLT)
6584 goto relax32;
6585 /* Fall thru */
6586
6587 case R_PPC_RELAX32PC:
6588 relocation -= (input_section->output_section->vma
6589 + input_section->output_offset
6590 + rel->r_offset - 4);
6591 /* Fall thru */
6592
6593 case R_PPC_RELAX32:
6594 relax32:
6595 {
6596 unsigned long t0;
6597 unsigned long t1;
6598
6599 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6600 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6601
6602 /* We're clearing the bits for R_PPC_ADDR16_HA
6603 and R_PPC_ADDR16_LO here. */
6604 t0 &= ~0xffff;
6605 t1 &= ~0xffff;
6606
6607 /* t0 is HA, t1 is LO */
6608 relocation += addend;
6609 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6610 t1 |= relocation & 0xffff;
6611
6612 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6613 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6614 }
6615 continue;
6616
6617 /* Indirect .sdata relocation. */
6618 case R_PPC_EMB_SDAI16:
6619 BFD_ASSERT (htab->sdata[0].section != NULL);
6620 relocation
6621 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6622 h, relocation, rel);
6623 break;
6624
6625 /* Indirect .sdata2 relocation. */
6626 case R_PPC_EMB_SDA2I16:
6627 BFD_ASSERT (htab->sdata[1].section != NULL);
6628 relocation
6629 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6630 h, relocation, rel);
6631 break;
6632
6633 /* Handle the TOC16 reloc. We want to use the offset within the .got
6634 section, not the actual VMA. This is appropriate when generating
6635 an embedded ELF object, for which the .got section acts like the
6636 AIX .toc section. */
6637 case R_PPC_TOC16: /* phony GOT16 relocations */
6638 BFD_ASSERT (sec != NULL);
6639 BFD_ASSERT (bfd_is_und_section (sec)
6640 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6641 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6642
6643 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6644 break;
6645
6646 case R_PPC_PLTREL24:
6647 /* Relocation is to the entry for this symbol in the
6648 procedure linkage table. */
6649 {
6650 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6651
6652 addend = 0;
6653 if (ent == NULL
6654 || htab->plt == NULL)
6655 {
6656 /* We didn't make a PLT entry for this symbol. This
6657 happens when statically linking PIC code, or when
6658 using -Bsymbolic. */
6659 break;
6660 }
6661
6662 unresolved_reloc = FALSE;
6663 if (htab->plt_type == PLT_NEW)
6664 relocation = (htab->glink->output_section->vma
6665 + htab->glink->output_offset
6666 + ent->glink_offset);
6667 else
6668 relocation = (htab->plt->output_section->vma
6669 + htab->plt->output_offset
6670 + ent->plt.offset);
6671 }
6672 break;
6673
6674 /* Relocate against _SDA_BASE_. */
6675 case R_PPC_SDAREL16:
6676 {
6677 const char *name;
6678 struct elf_link_hash_entry *sh;
6679
6680 BFD_ASSERT (sec != NULL);
6681 name = bfd_get_section_name (abfd, sec->output_section);
6682 if (! ((CONST_STRNEQ (name, ".sdata")
6683 && (name[6] == 0 || name[6] == '.'))
6684 || (CONST_STRNEQ (name, ".sbss")
6685 && (name[5] == 0 || name[5] == '.'))))
6686 {
6687 (*_bfd_error_handler)
6688 (_("%B: the target (%s) of a %s relocation is "
6689 "in the wrong output section (%s)"),
6690 input_bfd,
6691 sym_name,
6692 howto->name,
6693 name);
6694 }
6695 sh = htab->sdata[0].sym;
6696 addend -= (sh->root.u.def.value
6697 + sh->root.u.def.section->output_offset
6698 + sh->root.u.def.section->output_section->vma);
6699 }
6700 break;
6701
6702 /* Relocate against _SDA2_BASE_. */
6703 case R_PPC_EMB_SDA2REL:
6704 {
6705 const char *name;
6706 struct elf_link_hash_entry *sh;
6707
6708 BFD_ASSERT (sec != NULL);
6709 name = bfd_get_section_name (abfd, sec->output_section);
6710 if (! (CONST_STRNEQ (name, ".sdata2")
6711 || CONST_STRNEQ (name, ".sbss2")))
6712 {
6713 (*_bfd_error_handler)
6714 (_("%B: the target (%s) of a %s relocation is "
6715 "in the wrong output section (%s)"),
6716 input_bfd,
6717 sym_name,
6718 howto->name,
6719 name);
6720
6721 bfd_set_error (bfd_error_bad_value);
6722 ret = FALSE;
6723 continue;
6724 }
6725 sh = htab->sdata[1].sym;
6726 addend -= (sh->root.u.def.value
6727 + sh->root.u.def.section->output_offset
6728 + sh->root.u.def.section->output_section->vma);
6729 }
6730 break;
6731
6732 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6733 case R_PPC_EMB_SDA21:
6734 case R_PPC_EMB_RELSDA:
6735 {
6736 const char *name;
6737 int reg;
6738 struct elf_link_hash_entry *sh;
6739
6740 BFD_ASSERT (sec != NULL);
6741 name = bfd_get_section_name (abfd, sec->output_section);
6742 if (((CONST_STRNEQ (name, ".sdata")
6743 && (name[6] == 0 || name[6] == '.'))
6744 || (CONST_STRNEQ (name, ".sbss")
6745 && (name[5] == 0 || name[5] == '.'))))
6746 {
6747 reg = 13;
6748 sh = htab->sdata[0].sym;
6749 addend -= (sh->root.u.def.value
6750 + sh->root.u.def.section->output_offset
6751 + sh->root.u.def.section->output_section->vma);
6752 }
6753
6754 else if (CONST_STRNEQ (name, ".sdata2")
6755 || CONST_STRNEQ (name, ".sbss2"))
6756 {
6757 reg = 2;
6758 sh = htab->sdata[1].sym;
6759 addend -= (sh->root.u.def.value
6760 + sh->root.u.def.section->output_offset
6761 + sh->root.u.def.section->output_section->vma);
6762 }
6763
6764 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6765 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6766 {
6767 reg = 0;
6768 }
6769
6770 else
6771 {
6772 (*_bfd_error_handler)
6773 (_("%B: the target (%s) of a %s relocation is "
6774 "in the wrong output section (%s)"),
6775 input_bfd,
6776 sym_name,
6777 howto->name,
6778 name);
6779
6780 bfd_set_error (bfd_error_bad_value);
6781 ret = FALSE;
6782 continue;
6783 }
6784
6785 if (r_type == R_PPC_EMB_SDA21)
6786 { /* fill in register field */
6787 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6788 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6789 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6790 }
6791 }
6792 break;
6793
6794 /* Relocate against the beginning of the section. */
6795 case R_PPC_SECTOFF:
6796 case R_PPC_SECTOFF_LO:
6797 case R_PPC_SECTOFF_HI:
6798 case R_PPC_SECTOFF_HA:
6799 BFD_ASSERT (sec != NULL);
6800 addend -= sec->output_section->vma;
6801 break;
6802
6803 /* Negative relocations. */
6804 case R_PPC_EMB_NADDR32:
6805 case R_PPC_EMB_NADDR16:
6806 case R_PPC_EMB_NADDR16_LO:
6807 case R_PPC_EMB_NADDR16_HI:
6808 case R_PPC_EMB_NADDR16_HA:
6809 addend -= 2 * relocation;
6810 break;
6811
6812 case R_PPC_COPY:
6813 case R_PPC_GLOB_DAT:
6814 case R_PPC_JMP_SLOT:
6815 case R_PPC_RELATIVE:
6816 case R_PPC_PLT32:
6817 case R_PPC_PLTREL32:
6818 case R_PPC_PLT16_LO:
6819 case R_PPC_PLT16_HI:
6820 case R_PPC_PLT16_HA:
6821 case R_PPC_ADDR30:
6822 case R_PPC_EMB_RELSEC16:
6823 case R_PPC_EMB_RELST_LO:
6824 case R_PPC_EMB_RELST_HI:
6825 case R_PPC_EMB_RELST_HA:
6826 case R_PPC_EMB_BIT_FLD:
6827 (*_bfd_error_handler)
6828 (_("%B: relocation %s is not yet supported for symbol %s."),
6829 input_bfd,
6830 howto->name,
6831 sym_name);
6832
6833 bfd_set_error (bfd_error_invalid_operation);
6834 ret = FALSE;
6835 continue;
6836 }
6837
6838 /* Do any further special processing. */
6839 switch (r_type)
6840 {
6841 default:
6842 break;
6843
6844 case R_PPC_ADDR16_HA:
6845 case R_PPC_REL16_HA:
6846 case R_PPC_SECTOFF_HA:
6847 case R_PPC_TPREL16_HA:
6848 case R_PPC_DTPREL16_HA:
6849 case R_PPC_EMB_NADDR16_HA:
6850 case R_PPC_EMB_RELST_HA:
6851 /* It's just possible that this symbol is a weak symbol
6852 that's not actually defined anywhere. In that case,
6853 'sec' would be NULL, and we should leave the symbol
6854 alone (it will be set to zero elsewhere in the link). */
6855 if (sec == NULL)
6856 break;
6857 /* Fall thru */
6858
6859 case R_PPC_PLT16_HA:
6860 case R_PPC_GOT16_HA:
6861 case R_PPC_GOT_TLSGD16_HA:
6862 case R_PPC_GOT_TLSLD16_HA:
6863 case R_PPC_GOT_TPREL16_HA:
6864 case R_PPC_GOT_DTPREL16_HA:
6865 /* Add 0x10000 if sign bit in 0:15 is set.
6866 Bits 0:15 are not used. */
6867 addend += 0x8000;
6868 break;
6869 }
6870
6871 #ifdef DEBUG
6872 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6873 "offset = %ld, addend = %ld\n",
6874 howto->name,
6875 (int) r_type,
6876 sym_name,
6877 r_symndx,
6878 (long) rel->r_offset,
6879 (long) addend);
6880 #endif
6881
6882 if (unresolved_reloc
6883 && !((input_section->flags & SEC_DEBUGGING) != 0
6884 && h->def_dynamic))
6885 {
6886 (*_bfd_error_handler)
6887 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6888 input_bfd,
6889 input_section,
6890 (long) rel->r_offset,
6891 howto->name,
6892 sym_name);
6893 ret = FALSE;
6894 }
6895
6896 r = _bfd_final_link_relocate (howto,
6897 input_bfd,
6898 input_section,
6899 contents,
6900 rel->r_offset,
6901 relocation,
6902 addend);
6903
6904 if (r != bfd_reloc_ok)
6905 {
6906 if (r == bfd_reloc_overflow)
6907 {
6908 if (warned)
6909 continue;
6910 if (h != NULL
6911 && h->root.type == bfd_link_hash_undefweak
6912 && howto->pc_relative)
6913 {
6914 /* Assume this is a call protected by other code that
6915 detect the symbol is undefined. If this is the case,
6916 we can safely ignore the overflow. If not, the
6917 program is hosed anyway, and a little warning isn't
6918 going to help. */
6919
6920 continue;
6921 }
6922
6923 if (! (*info->callbacks->reloc_overflow) (info,
6924 (h ? &h->root : NULL),
6925 sym_name,
6926 howto->name,
6927 rel->r_addend,
6928 input_bfd,
6929 input_section,
6930 rel->r_offset))
6931 return FALSE;
6932 }
6933 else
6934 {
6935 (*_bfd_error_handler)
6936 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6937 input_bfd, input_section,
6938 (long) rel->r_offset, howto->name, sym_name, (int) r);
6939 ret = FALSE;
6940 }
6941 }
6942 }
6943
6944 #ifdef DEBUG
6945 fprintf (stderr, "\n");
6946 #endif
6947
6948 return ret;
6949 }
6950 \f
6951 #define PPC_LO(v) ((v) & 0xffff)
6952 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6953 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6954
6955 /* Finish up dynamic symbol handling. We set the contents of various
6956 dynamic sections here. */
6957
6958 static bfd_boolean
6959 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6960 struct bfd_link_info *info,
6961 struct elf_link_hash_entry *h,
6962 Elf_Internal_Sym *sym)
6963 {
6964 struct ppc_elf_link_hash_table *htab;
6965 struct plt_entry *ent;
6966 bfd_boolean doneone;
6967
6968 #ifdef DEBUG
6969 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6970 h->root.root.string);
6971 #endif
6972
6973 htab = ppc_elf_hash_table (info);
6974 BFD_ASSERT (htab->elf.dynobj != NULL);
6975
6976 doneone = FALSE;
6977 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6978 if (ent->plt.offset != (bfd_vma) -1)
6979 {
6980 if (!doneone)
6981 {
6982 Elf_Internal_Rela rela;
6983 bfd_byte *loc;
6984 bfd_vma reloc_index;
6985
6986 if (htab->plt_type == PLT_NEW)
6987 reloc_index = ent->plt.offset / 4;
6988 else
6989 {
6990 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6991 / htab->plt_slot_size);
6992 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6993 && htab->plt_type == PLT_OLD)
6994 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6995 }
6996
6997 /* This symbol has an entry in the procedure linkage table.
6998 Set it up. */
6999 if (htab->plt_type == PLT_VXWORKS)
7000 {
7001 bfd_vma got_offset;
7002 const bfd_vma *plt_entry;
7003
7004 /* The first three entries in .got.plt are reserved. */
7005 got_offset = (reloc_index + 3) * 4;
7006
7007 /* Use the right PLT. */
7008 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7009 : ppc_elf_vxworks_plt_entry;
7010
7011 /* Fill in the .plt on VxWorks. */
7012 if (info->shared)
7013 {
7014 bfd_vma got_offset_hi = (got_offset >> 16)
7015 + ((got_offset & 0x8000) >> 15);
7016
7017 bfd_put_32 (output_bfd,
7018 plt_entry[0] | (got_offset_hi & 0xffff),
7019 htab->plt->contents + ent->plt.offset + 0);
7020 bfd_put_32 (output_bfd,
7021 plt_entry[1] | (got_offset & 0xffff),
7022 htab->plt->contents + ent->plt.offset + 4);
7023 }
7024 else
7025 {
7026 bfd_vma got_loc
7027 = (got_offset
7028 + htab->elf.hgot->root.u.def.value
7029 + htab->elf.hgot->root.u.def.section->output_offset
7030 + htab->elf.hgot->root.u.def.section->output_section->vma);
7031 bfd_vma got_loc_hi = (got_loc >> 16)
7032 + ((got_loc & 0x8000) >> 15);
7033
7034 bfd_put_32 (output_bfd,
7035 plt_entry[0] | (got_loc_hi & 0xffff),
7036 htab->plt->contents + ent->plt.offset + 0);
7037 bfd_put_32 (output_bfd,
7038 plt_entry[1] | (got_loc & 0xffff),
7039 htab->plt->contents + ent->plt.offset + 4);
7040 }
7041
7042 bfd_put_32 (output_bfd, plt_entry[2],
7043 htab->plt->contents + ent->plt.offset + 8);
7044 bfd_put_32 (output_bfd, plt_entry[3],
7045 htab->plt->contents + ent->plt.offset + 12);
7046
7047 /* This instruction is an immediate load. The value loaded is
7048 the byte offset of the R_PPC_JMP_SLOT relocation from the
7049 start of the .rela.plt section. The value is stored in the
7050 low-order 16 bits of the load instruction. */
7051 /* NOTE: It appears that this is now an index rather than a
7052 prescaled offset. */
7053 bfd_put_32 (output_bfd,
7054 plt_entry[4] | reloc_index,
7055 htab->plt->contents + ent->plt.offset + 16);
7056 /* This instruction is a PC-relative branch whose target is
7057 the start of the PLT section. The address of this branch
7058 instruction is 20 bytes beyond the start of this PLT entry.
7059 The address is encoded in bits 6-29, inclusive. The value
7060 stored is right-shifted by two bits, permitting a 26-bit
7061 offset. */
7062 bfd_put_32 (output_bfd,
7063 (plt_entry[5]
7064 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7065 htab->plt->contents + ent->plt.offset + 20);
7066 bfd_put_32 (output_bfd, plt_entry[6],
7067 htab->plt->contents + ent->plt.offset + 24);
7068 bfd_put_32 (output_bfd, plt_entry[7],
7069 htab->plt->contents + ent->plt.offset + 28);
7070
7071 /* Fill in the GOT entry corresponding to this PLT slot with
7072 the address immediately after the the "bctr" instruction
7073 in this PLT entry. */
7074 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7075 + htab->plt->output_offset
7076 + ent->plt.offset + 16),
7077 htab->sgotplt->contents + got_offset);
7078
7079 if (!info->shared)
7080 {
7081 /* Fill in a couple of entries in .rela.plt.unloaded. */
7082 loc = htab->srelplt2->contents
7083 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7084 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7085 * sizeof (Elf32_External_Rela));
7086
7087 /* Provide the @ha relocation for the first instruction. */
7088 rela.r_offset = (htab->plt->output_section->vma
7089 + htab->plt->output_offset
7090 + ent->plt.offset + 2);
7091 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7092 R_PPC_ADDR16_HA);
7093 rela.r_addend = got_offset;
7094 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7095 loc += sizeof (Elf32_External_Rela);
7096
7097 /* Provide the @l relocation for the second instruction. */
7098 rela.r_offset = (htab->plt->output_section->vma
7099 + htab->plt->output_offset
7100 + ent->plt.offset + 6);
7101 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7102 R_PPC_ADDR16_LO);
7103 rela.r_addend = got_offset;
7104 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7105 loc += sizeof (Elf32_External_Rela);
7106
7107 /* Provide a relocation for the GOT entry corresponding to this
7108 PLT slot. Point it at the middle of the .plt entry. */
7109 rela.r_offset = (htab->sgotplt->output_section->vma
7110 + htab->sgotplt->output_offset
7111 + got_offset);
7112 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7113 R_PPC_ADDR32);
7114 rela.r_addend = ent->plt.offset + 16;
7115 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7116 }
7117
7118 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7119 In particular, the offset for the relocation is not the
7120 address of the PLT entry for this function, as specified
7121 by the ABI. Instead, the offset is set to the address of
7122 the GOT slot for this function. See EABI 4.4.4.1. */
7123 rela.r_offset = (htab->sgotplt->output_section->vma
7124 + htab->sgotplt->output_offset
7125 + got_offset);
7126
7127 }
7128 else
7129 {
7130 rela.r_offset = (htab->plt->output_section->vma
7131 + htab->plt->output_offset
7132 + ent->plt.offset);
7133 if (htab->plt_type == PLT_OLD)
7134 {
7135 /* We don't need to fill in the .plt. The ppc dynamic
7136 linker will fill it in. */
7137 }
7138 else
7139 {
7140 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7141 + htab->glink->output_section->vma
7142 + htab->glink->output_offset);
7143 bfd_put_32 (output_bfd, val,
7144 htab->plt->contents + ent->plt.offset);
7145 }
7146 }
7147
7148 /* Fill in the entry in the .rela.plt section. */
7149 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7150 rela.r_addend = 0;
7151
7152 loc = (htab->relplt->contents
7153 + reloc_index * sizeof (Elf32_External_Rela));
7154 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7155
7156 if (!h->def_regular)
7157 {
7158 /* Mark the symbol as undefined, rather than as
7159 defined in the .plt section. Leave the value if
7160 there were any relocations where pointer equality
7161 matters (this is a clue for the dynamic linker, to
7162 make function pointer comparisons work between an
7163 application and shared library), otherwise set it
7164 to zero. */
7165 sym->st_shndx = SHN_UNDEF;
7166 if (!h->pointer_equality_needed)
7167 sym->st_value = 0;
7168 else if (!h->ref_regular_nonweak)
7169 {
7170 /* Choose your poison. We must have either text
7171 dynamic relocations, broken function pointer
7172 comparisons, or broken tests for a NULL
7173 function pointer. */
7174 (*_bfd_error_handler)
7175 (_("weak reference to %s in non-pic code"
7176 " will break function pointer comparisons"),
7177 h->root.root.string);
7178 sym->st_value = 0;
7179 }
7180 }
7181 doneone = TRUE;
7182 }
7183
7184 if (htab->plt_type == PLT_NEW)
7185 {
7186 bfd_vma plt;
7187 unsigned char *p;
7188
7189 plt = (ent->plt.offset
7190 + htab->plt->output_section->vma
7191 + htab->plt->output_offset);
7192 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7193
7194 if (info->shared || info->pie)
7195 {
7196 bfd_vma got = 0;
7197
7198 if (ent->addend >= 32768)
7199 got = (ent->addend
7200 + ent->sec->output_section->vma
7201 + ent->sec->output_offset);
7202 else if (htab->elf.hgot != NULL)
7203 got = (htab->elf.hgot->root.u.def.value
7204 + htab->elf.hgot->root.u.def.section->output_section->vma
7205 + htab->elf.hgot->root.u.def.section->output_offset);
7206
7207 plt -= got;
7208
7209 if (plt + 0x8000 < 0x10000)
7210 {
7211 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7212 p += 4;
7213 bfd_put_32 (output_bfd, MTCTR_11, p);
7214 p += 4;
7215 bfd_put_32 (output_bfd, BCTR, p);
7216 p += 4;
7217 bfd_put_32 (output_bfd, NOP, p);
7218 p += 4;
7219 }
7220 else
7221 {
7222 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7223 p += 4;
7224 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7225 p += 4;
7226 bfd_put_32 (output_bfd, MTCTR_11, p);
7227 p += 4;
7228 bfd_put_32 (output_bfd, BCTR, p);
7229 p += 4;
7230 }
7231 }
7232 else
7233 {
7234 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7235 p += 4;
7236 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7237 p += 4;
7238 bfd_put_32 (output_bfd, MTCTR_11, p);
7239 p += 4;
7240 bfd_put_32 (output_bfd, BCTR, p);
7241 p += 4;
7242
7243 /* We only need one non-PIC glink stub. */
7244 break;
7245 }
7246 }
7247 else
7248 break;
7249 }
7250
7251 if (h->needs_copy)
7252 {
7253 asection *s;
7254 Elf_Internal_Rela rela;
7255 bfd_byte *loc;
7256
7257 /* This symbols needs a copy reloc. Set it up. */
7258
7259 #ifdef DEBUG
7260 fprintf (stderr, ", copy");
7261 #endif
7262
7263 BFD_ASSERT (h->dynindx != -1);
7264
7265 if (ppc_elf_hash_entry (h)->has_sda_refs)
7266 s = htab->relsbss;
7267 else
7268 s = htab->relbss;
7269 BFD_ASSERT (s != NULL);
7270
7271 rela.r_offset = (h->root.u.def.value
7272 + h->root.u.def.section->output_section->vma
7273 + h->root.u.def.section->output_offset);
7274 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7275 rela.r_addend = 0;
7276 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7277 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7278 }
7279
7280 #ifdef DEBUG
7281 fprintf (stderr, "\n");
7282 #endif
7283
7284 /* Mark some specially defined symbols as absolute. */
7285 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7286 || (!htab->is_vxworks
7287 && (h == htab->elf.hgot
7288 || strcmp (h->root.root.string,
7289 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7290 sym->st_shndx = SHN_ABS;
7291
7292 return TRUE;
7293 }
7294 \f
7295 static enum elf_reloc_type_class
7296 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7297 {
7298 switch (ELF32_R_TYPE (rela->r_info))
7299 {
7300 case R_PPC_RELATIVE:
7301 return reloc_class_relative;
7302 case R_PPC_REL24:
7303 case R_PPC_ADDR24:
7304 case R_PPC_JMP_SLOT:
7305 return reloc_class_plt;
7306 case R_PPC_COPY:
7307 return reloc_class_copy;
7308 default:
7309 return reloc_class_normal;
7310 }
7311 }
7312 \f
7313 /* Finish up the dynamic sections. */
7314
7315 static bfd_boolean
7316 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7317 struct bfd_link_info *info)
7318 {
7319 asection *sdyn;
7320 asection *splt;
7321 struct ppc_elf_link_hash_table *htab;
7322 bfd_vma got;
7323 bfd * dynobj;
7324
7325 #ifdef DEBUG
7326 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7327 #endif
7328
7329 htab = ppc_elf_hash_table (info);
7330 dynobj = elf_hash_table (info)->dynobj;
7331 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7332 if (htab->is_vxworks)
7333 splt = bfd_get_section_by_name (dynobj, ".plt");
7334 else
7335 splt = NULL;
7336
7337 got = 0;
7338 if (htab->elf.hgot != NULL)
7339 got = (htab->elf.hgot->root.u.def.value
7340 + htab->elf.hgot->root.u.def.section->output_section->vma
7341 + htab->elf.hgot->root.u.def.section->output_offset);
7342
7343 if (htab->elf.dynamic_sections_created)
7344 {
7345 Elf32_External_Dyn *dyncon, *dynconend;
7346
7347 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7348
7349 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7350 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7351 for (; dyncon < dynconend; dyncon++)
7352 {
7353 Elf_Internal_Dyn dyn;
7354 asection *s;
7355
7356 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7357
7358 switch (dyn.d_tag)
7359 {
7360 case DT_PLTGOT:
7361 if (htab->is_vxworks)
7362 s = htab->sgotplt;
7363 else
7364 s = htab->plt;
7365 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7366 break;
7367
7368 case DT_PLTRELSZ:
7369 dyn.d_un.d_val = htab->relplt->size;
7370 break;
7371
7372 case DT_JMPREL:
7373 s = htab->relplt;
7374 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7375 break;
7376
7377 case DT_PPC_GOT:
7378 dyn.d_un.d_ptr = got;
7379 break;
7380
7381 case DT_RELASZ:
7382 if (htab->is_vxworks)
7383 {
7384 if (htab->relplt)
7385 dyn.d_un.d_ptr -= htab->relplt->size;
7386 break;
7387 }
7388 continue;
7389
7390 default:
7391 if (htab->is_vxworks
7392 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7393 break;
7394 continue;
7395 }
7396
7397 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7398 }
7399 }
7400
7401 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7402 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7403 if (htab->got != NULL)
7404 {
7405 unsigned char *p = htab->got->contents;
7406 bfd_vma val;
7407
7408 p += htab->elf.hgot->root.u.def.value;
7409 if (htab->plt_type == PLT_OLD)
7410 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7411
7412 val = 0;
7413 if (sdyn != NULL)
7414 val = sdyn->output_section->vma + sdyn->output_offset;
7415 bfd_put_32 (output_bfd, val, p);
7416
7417 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7418 }
7419
7420 /* Fill in the first entry in the VxWorks procedure linkage table. */
7421 if (splt && splt->size > 0)
7422 {
7423 /* Use the right PLT. */
7424 static const bfd_vma *plt_entry = NULL;
7425 plt_entry = info->shared ?
7426 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7427
7428 if (!info->shared)
7429 {
7430 bfd_vma got_value =
7431 (htab->elf.hgot->root.u.def.section->output_section->vma
7432 + htab->elf.hgot->root.u.def.section->output_offset
7433 + htab->elf.hgot->root.u.def.value);
7434 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7435
7436 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7437 splt->contents + 0);
7438 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7439 splt->contents + 4);
7440 }
7441 else
7442 {
7443 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7444 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7445 }
7446 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7447 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7448 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7449 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7450 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7451 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7452
7453 if (! info->shared)
7454 {
7455 Elf_Internal_Rela rela;
7456 bfd_byte *loc;
7457
7458 loc = htab->srelplt2->contents;
7459
7460 /* Output the @ha relocation for the first instruction. */
7461 rela.r_offset = (htab->plt->output_section->vma
7462 + htab->plt->output_offset
7463 + 2);
7464 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7465 rela.r_addend = 0;
7466 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7467 loc += sizeof (Elf32_External_Rela);
7468
7469 /* Output the @l relocation for the second instruction. */
7470 rela.r_offset = (htab->plt->output_section->vma
7471 + htab->plt->output_offset
7472 + 6);
7473 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7474 rela.r_addend = 0;
7475 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7476 loc += sizeof (Elf32_External_Rela);
7477
7478 /* Fix up the remaining relocations. They may have the wrong
7479 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7480 in which symbols were output. */
7481 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7482 {
7483 Elf_Internal_Rela rel;
7484
7485 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7486 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7487 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7488 loc += sizeof (Elf32_External_Rela);
7489
7490 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7491 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7492 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7493 loc += sizeof (Elf32_External_Rela);
7494
7495 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7496 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7497 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7498 loc += sizeof (Elf32_External_Rela);
7499 }
7500 }
7501 }
7502
7503 if (htab->glink != NULL && htab->glink->contents != NULL)
7504 {
7505 unsigned char *p;
7506 unsigned char *endp;
7507 bfd_vma res0;
7508 unsigned int i;
7509
7510 /*
7511 * PIC glink code is the following:
7512 *
7513 * # ith PLT code stub.
7514 * addis 11,30,(plt+(i-1)*4-got)@ha
7515 * lwz 11,(plt+(i-1)*4-got)@l(11)
7516 * mtctr 11
7517 * bctr
7518 *
7519 * # A table of branches, one for each plt entry.
7520 * # The idea is that the plt call stub loads ctr (and r11) with these
7521 * # addresses, so (r11 - res_0) gives the plt index * 4.
7522 * res_0: b PLTresolve
7523 * res_1: b PLTresolve
7524 * .
7525 * # Some number of entries towards the end can be nops
7526 * res_n_m3: nop
7527 * res_n_m2: nop
7528 * res_n_m1:
7529 *
7530 * PLTresolve:
7531 * addis 11,11,(1f-res_0)@ha
7532 * mflr 0
7533 * bcl 20,31,1f
7534 * 1: addi 11,11,(1b-res_0)@l
7535 * mflr 12
7536 * mtlr 0
7537 * sub 11,11,12 # r11 = index * 4
7538 * addis 12,12,(got+4-1b)@ha
7539 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7540 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7541 * mtctr 0
7542 * add 0,11,11
7543 * add 11,0,11 # r11 = index * 12 = reloc offset.
7544 * bctr
7545 */
7546 static const unsigned int pic_plt_resolve[] =
7547 {
7548 ADDIS_11_11,
7549 MFLR_0,
7550 BCL_20_31,
7551 ADDI_11_11,
7552 MFLR_12,
7553 MTLR_0,
7554 SUB_11_11_12,
7555 ADDIS_12_12,
7556 LWZ_0_12,
7557 LWZ_12_12,
7558 MTCTR_0,
7559 ADD_0_11_11,
7560 ADD_11_0_11,
7561 BCTR,
7562 NOP,
7563 NOP
7564 };
7565
7566 static const unsigned int plt_resolve[] =
7567 {
7568 LIS_12,
7569 ADDIS_11_11,
7570 LWZ_0_12,
7571 ADDI_11_11,
7572 MTCTR_0,
7573 ADD_0_11_11,
7574 LWZ_12_12,
7575 ADD_11_0_11,
7576 BCTR,
7577 NOP,
7578 NOP,
7579 NOP,
7580 NOP,
7581 NOP,
7582 NOP,
7583 NOP
7584 };
7585
7586 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7587 abort ();
7588 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7589 abort ();
7590
7591 /* Build the branch table, one for each plt entry (less one),
7592 and perhaps some padding. */
7593 p = htab->glink->contents;
7594 p += htab->glink_pltresolve;
7595 endp = htab->glink->contents;
7596 endp += htab->glink->size - GLINK_PLTRESOLVE;
7597 while (p < endp - 8 * 4)
7598 {
7599 bfd_put_32 (output_bfd, B + endp - p, p);
7600 p += 4;
7601 }
7602 while (p < endp)
7603 {
7604 bfd_put_32 (output_bfd, NOP, p);
7605 p += 4;
7606 }
7607
7608 res0 = (htab->glink_pltresolve
7609 + htab->glink->output_section->vma
7610 + htab->glink->output_offset);
7611
7612 /* Last comes the PLTresolve stub. */
7613 if (info->shared || info->pie)
7614 {
7615 bfd_vma bcl;
7616
7617 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7618 {
7619 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7620 p += 4;
7621 }
7622 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7623
7624 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7625 + htab->glink->output_section->vma
7626 + htab->glink->output_offset);
7627
7628 bfd_put_32 (output_bfd,
7629 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7630 bfd_put_32 (output_bfd,
7631 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7632 bfd_put_32 (output_bfd,
7633 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7634 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7635 {
7636 bfd_put_32 (output_bfd,
7637 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7638 bfd_put_32 (output_bfd,
7639 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7640 }
7641 else
7642 {
7643 bfd_put_32 (output_bfd,
7644 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7645 bfd_put_32 (output_bfd,
7646 LWZ_12_12 + 4, p + 9*4);
7647 }
7648 }
7649 else
7650 {
7651 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7652 {
7653 bfd_put_32 (output_bfd, plt_resolve[i], p);
7654 p += 4;
7655 }
7656 p -= 4 * ARRAY_SIZE (plt_resolve);
7657
7658 bfd_put_32 (output_bfd,
7659 LIS_12 + PPC_HA (got + 4), p + 0*4);
7660 bfd_put_32 (output_bfd,
7661 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7662 bfd_put_32 (output_bfd,
7663 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7664 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7665 {
7666 bfd_put_32 (output_bfd,
7667 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7668 bfd_put_32 (output_bfd,
7669 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7670 }
7671 else
7672 {
7673 bfd_put_32 (output_bfd,
7674 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7675 bfd_put_32 (output_bfd,
7676 LWZ_12_12 + 4, p + 6*4);
7677 }
7678 }
7679 }
7680
7681 return TRUE;
7682 }
7683 \f
7684 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7685 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7686 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7687 #define TARGET_BIG_NAME "elf32-powerpc"
7688 #define ELF_ARCH bfd_arch_powerpc
7689 #define ELF_MACHINE_CODE EM_PPC
7690 #ifdef __QNXTARGET__
7691 #define ELF_MAXPAGESIZE 0x1000
7692 #else
7693 #define ELF_MAXPAGESIZE 0x10000
7694 #endif
7695 #define ELF_MINPAGESIZE 0x1000
7696 #define ELF_COMMONPAGESIZE 0x1000
7697 #define elf_info_to_howto ppc_elf_info_to_howto
7698
7699 #ifdef EM_CYGNUS_POWERPC
7700 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7701 #endif
7702
7703 #ifdef EM_PPC_OLD
7704 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7705 #endif
7706
7707 #define elf_backend_plt_not_loaded 1
7708 #define elf_backend_can_gc_sections 1
7709 #define elf_backend_can_refcount 1
7710 #define elf_backend_rela_normal 1
7711
7712 #define bfd_elf32_mkobject ppc_elf_mkobject
7713 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7714 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7715 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7716 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7717 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7718 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7719
7720 #define elf_backend_object_p ppc_elf_object_p
7721 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7722 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7723 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7724 #define elf_backend_relocate_section ppc_elf_relocate_section
7725 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7726 #define elf_backend_check_relocs ppc_elf_check_relocs
7727 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7728 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7729 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7730 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7731 #define elf_backend_hash_symbol ppc_elf_hash_symbol
7732 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7733 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7734 #define elf_backend_fake_sections ppc_elf_fake_sections
7735 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7736 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7737 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7738 #define elf_backend_write_core_note ppc_elf_write_core_note
7739 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7740 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7741 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7742 #define elf_backend_write_section ppc_elf_write_section
7743 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7744 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7745 #define elf_backend_action_discarded ppc_elf_action_discarded
7746 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7747
7748 #include "elf32-target.h"
7749
7750 /* VxWorks Target */
7751
7752 #undef TARGET_LITTLE_SYM
7753 #undef TARGET_LITTLE_NAME
7754
7755 #undef TARGET_BIG_SYM
7756 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7757 #undef TARGET_BIG_NAME
7758 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7759
7760 /* VxWorks uses the elf default section flags for .plt. */
7761 static const struct bfd_elf_special_section *
7762 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7763 {
7764 if (sec->name == NULL)
7765 return NULL;
7766
7767 if (strcmp (sec->name, ".plt") == 0)
7768 return _bfd_elf_get_sec_type_attr (abfd, sec);
7769
7770 return ppc_elf_get_sec_type_attr (abfd, sec);
7771 }
7772
7773 /* Like ppc_elf_link_hash_table_create, but overrides
7774 appropriately for VxWorks. */
7775 static struct bfd_link_hash_table *
7776 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7777 {
7778 struct bfd_link_hash_table *ret;
7779
7780 ret = ppc_elf_link_hash_table_create (abfd);
7781 if (ret)
7782 {
7783 struct ppc_elf_link_hash_table *htab
7784 = (struct ppc_elf_link_hash_table *)ret;
7785 htab->is_vxworks = 1;
7786 htab->plt_type = PLT_VXWORKS;
7787 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7788 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7789 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7790 }
7791 return ret;
7792 }
7793
7794 /* Tweak magic VxWorks symbols as they are loaded. */
7795 static bfd_boolean
7796 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7797 struct bfd_link_info *info,
7798 Elf_Internal_Sym *sym,
7799 const char **namep ATTRIBUTE_UNUSED,
7800 flagword *flagsp ATTRIBUTE_UNUSED,
7801 asection **secp,
7802 bfd_vma *valp)
7803 {
7804 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7805 valp))
7806 return FALSE;
7807
7808 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7809 }
7810
7811 static void
7812 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7813 {
7814 ppc_elf_final_write_processing(abfd, linker);
7815 elf_vxworks_final_write_processing(abfd, linker);
7816 }
7817
7818 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7819 define it. */
7820 #undef elf_backend_want_plt_sym
7821 #define elf_backend_want_plt_sym 1
7822 #undef elf_backend_want_got_plt
7823 #define elf_backend_want_got_plt 1
7824 #undef elf_backend_got_symbol_offset
7825 #define elf_backend_got_symbol_offset 0
7826 #undef elf_backend_plt_not_loaded
7827 #define elf_backend_plt_not_loaded 0
7828 #undef elf_backend_plt_readonly
7829 #define elf_backend_plt_readonly 1
7830 #undef elf_backend_got_header_size
7831 #define elf_backend_got_header_size 12
7832
7833 #undef bfd_elf32_bfd_link_hash_table_create
7834 #define bfd_elf32_bfd_link_hash_table_create \
7835 ppc_elf_vxworks_link_hash_table_create
7836 #undef elf_backend_add_symbol_hook
7837 #define elf_backend_add_symbol_hook \
7838 ppc_elf_vxworks_add_symbol_hook
7839 #undef elf_backend_link_output_symbol_hook
7840 #define elf_backend_link_output_symbol_hook \
7841 elf_vxworks_link_output_symbol_hook
7842 #undef elf_backend_final_write_processing
7843 #define elf_backend_final_write_processing \
7844 ppc_elf_vxworks_final_write_processing
7845 #undef elf_backend_get_sec_type_attr
7846 #define elf_backend_get_sec_type_attr \
7847 ppc_elf_vxworks_get_sec_type_attr
7848 #undef elf_backend_emit_relocs
7849 #define elf_backend_emit_relocs \
7850 elf_vxworks_emit_relocs
7851
7852 #undef elf32_bed
7853 #define elf32_bed ppc_elf_vxworks_bed
7854
7855 #include "elf32-target.h"
GDB Binutils - Deliverables
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