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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 /* Override the generic function because we store some extras. */
1740
1741 static bfd_boolean
1742 ppc_elf_mkobject (bfd *abfd)
1743 {
1744 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1745 PPC32_ELF_TDATA);
1746 }
1747
1748 /* Fix bad default arch selected for a 32 bit input bfd when the
1749 default is 64 bit. */
1750
1751 static bfd_boolean
1752 ppc_elf_object_p (bfd *abfd)
1753 {
1754 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1755 {
1756 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1757
1758 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1759 {
1760 /* Relies on arch after 64 bit default being 32 bit default. */
1761 abfd->arch_info = abfd->arch_info->next;
1762 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1763 }
1764 }
1765 return TRUE;
1766 }
1767
1768 /* Function to set whether a module needs the -mrelocatable bit set. */
1769
1770 static bfd_boolean
1771 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1772 {
1773 BFD_ASSERT (!elf_flags_init (abfd)
1774 || elf_elfheader (abfd)->e_flags == flags);
1775
1776 elf_elfheader (abfd)->e_flags = flags;
1777 elf_flags_init (abfd) = TRUE;
1778 return TRUE;
1779 }
1780
1781 /* Support for core dump NOTE sections. */
1782
1783 static bfd_boolean
1784 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 int offset;
1787 unsigned int size;
1788
1789 switch (note->descsz)
1790 {
1791 default:
1792 return FALSE;
1793
1794 case 268: /* Linux/PPC. */
1795 /* pr_cursig */
1796 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1797
1798 /* pr_pid */
1799 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1800
1801 /* pr_reg */
1802 offset = 72;
1803 size = 192;
1804
1805 break;
1806 }
1807
1808 /* Make a ".reg/999" section. */
1809 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1810 size, note->descpos + offset);
1811 }
1812
1813 static bfd_boolean
1814 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1815 {
1816 switch (note->descsz)
1817 {
1818 default:
1819 return FALSE;
1820
1821 case 128: /* Linux/PPC elf_prpsinfo. */
1822 elf_tdata (abfd)->core_program
1823 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1824 elf_tdata (abfd)->core_command
1825 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1826 }
1827
1828 /* Note that for some reason, a spurious space is tacked
1829 onto the end of the args in some (at least one anyway)
1830 implementations, so strip it off if it exists. */
1831
1832 {
1833 char *command = elf_tdata (abfd)->core_command;
1834 int n = strlen (command);
1835
1836 if (0 < n && command[n - 1] == ' ')
1837 command[n - 1] = '\0';
1838 }
1839
1840 return TRUE;
1841 }
1842
1843 static char *
1844 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1845 {
1846 switch (note_type)
1847 {
1848 default:
1849 return NULL;
1850
1851 case NT_PRPSINFO:
1852 {
1853 char data[128];
1854 va_list ap;
1855
1856 va_start (ap, note_type);
1857 memset (data, 0, 32);
1858 strncpy (data + 32, va_arg (ap, const char *), 16);
1859 strncpy (data + 48, va_arg (ap, const char *), 80);
1860 va_end (ap);
1861 return elfcore_write_note (abfd, buf, bufsiz,
1862 "CORE", note_type, data, sizeof (data));
1863 }
1864
1865 case NT_PRSTATUS:
1866 {
1867 char data[268];
1868 va_list ap;
1869 long pid;
1870 int cursig;
1871 const void *greg;
1872
1873 va_start (ap, note_type);
1874 memset (data, 0, 72);
1875 pid = va_arg (ap, long);
1876 bfd_put_32 (abfd, pid, data + 24);
1877 cursig = va_arg (ap, int);
1878 bfd_put_16 (abfd, cursig, data + 12);
1879 greg = va_arg (ap, const void *);
1880 memcpy (data + 72, greg, 192);
1881 memset (data + 264, 0, 4);
1882 va_end (ap);
1883 return elfcore_write_note (abfd, buf, bufsiz,
1884 "CORE", note_type, data, sizeof (data));
1885 }
1886 }
1887 }
1888
1889 /* Return address for Ith PLT stub in section PLT, for relocation REL
1890 or (bfd_vma) -1 if it should not be included. */
1891
1892 static bfd_vma
1893 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1894 const asection *plt ATTRIBUTE_UNUSED,
1895 const arelent *rel)
1896 {
1897 return rel->address;
1898 }
1899
1900 /* Handle a PowerPC specific section when reading an object file. This
1901 is called when bfd_section_from_shdr finds a section with an unknown
1902 type. */
1903
1904 static bfd_boolean
1905 ppc_elf_section_from_shdr (bfd *abfd,
1906 Elf_Internal_Shdr *hdr,
1907 const char *name,
1908 int shindex)
1909 {
1910 asection *newsect;
1911 flagword flags;
1912
1913 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1914 return FALSE;
1915
1916 newsect = hdr->bfd_section;
1917 flags = bfd_get_section_flags (abfd, newsect);
1918 if (hdr->sh_flags & SHF_EXCLUDE)
1919 flags |= SEC_EXCLUDE;
1920
1921 if (hdr->sh_type == SHT_ORDERED)
1922 flags |= SEC_SORT_ENTRIES;
1923
1924 bfd_set_section_flags (abfd, newsect, flags);
1925 return TRUE;
1926 }
1927
1928 /* Set up any other section flags and such that may be necessary. */
1929
1930 static bfd_boolean
1931 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1932 Elf_Internal_Shdr *shdr,
1933 asection *asect)
1934 {
1935 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1936 shdr->sh_flags |= SHF_EXCLUDE;
1937
1938 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1939 shdr->sh_type = SHT_ORDERED;
1940
1941 return TRUE;
1942 }
1943
1944 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1945 need to bump up the number of section headers. */
1946
1947 static int
1948 ppc_elf_additional_program_headers (bfd *abfd,
1949 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1950 {
1951 asection *s;
1952 int ret = 0;
1953
1954 s = bfd_get_section_by_name (abfd, ".sbss2");
1955 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1956 ++ret;
1957
1958 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1959 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1960 ++ret;
1961
1962 return ret;
1963 }
1964
1965 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1966 .PPC.EMB.sbss0 a normal section, and not a bss section so
1967 that the linker doesn't crater when trying to make more than
1968 2 sections. */
1969
1970 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1971 {
1972 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1973 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1974 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1975 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1976 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1977 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1978 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1979 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1980 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1981 { NULL, 0, 0, 0, 0 }
1982 };
1983
1984 /* This is what we want for new plt/got. */
1985 static struct bfd_elf_special_section ppc_alt_plt =
1986 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1987
1988 static const struct bfd_elf_special_section *
1989 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1990 {
1991 const struct bfd_elf_special_section *ssect;
1992
1993 /* See if this is one of the special sections. */
1994 if (sec->name == NULL)
1995 return NULL;
1996
1997 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1998 sec->use_rela_p);
1999 if (ssect != NULL)
2000 {
2001 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2002 ssect = &ppc_alt_plt;
2003 return ssect;
2004 }
2005
2006 return _bfd_elf_get_sec_type_attr (abfd, sec);
2007 }
2008 \f
2009 /* Very simple linked list structure for recording apuinfo values. */
2010 typedef struct apuinfo_list
2011 {
2012 struct apuinfo_list *next;
2013 unsigned long value;
2014 }
2015 apuinfo_list;
2016
2017 static apuinfo_list *head;
2018
2019
2020 static void
2021 apuinfo_list_init (void)
2022 {
2023 head = NULL;
2024 }
2025
2026 static void
2027 apuinfo_list_add (unsigned long value)
2028 {
2029 apuinfo_list *entry = head;
2030
2031 while (entry != NULL)
2032 {
2033 if (entry->value == value)
2034 return;
2035 entry = entry->next;
2036 }
2037
2038 entry = bfd_malloc (sizeof (* entry));
2039 if (entry == NULL)
2040 return;
2041
2042 entry->value = value;
2043 entry->next = head;
2044 head = entry;
2045 }
2046
2047 static unsigned
2048 apuinfo_list_length (void)
2049 {
2050 apuinfo_list *entry;
2051 unsigned long count;
2052
2053 for (entry = head, count = 0;
2054 entry;
2055 entry = entry->next)
2056 ++ count;
2057
2058 return count;
2059 }
2060
2061 static inline unsigned long
2062 apuinfo_list_element (unsigned long number)
2063 {
2064 apuinfo_list * entry;
2065
2066 for (entry = head;
2067 entry && number --;
2068 entry = entry->next)
2069 ;
2070
2071 return entry ? entry->value : 0;
2072 }
2073
2074 static void
2075 apuinfo_list_finish (void)
2076 {
2077 apuinfo_list *entry;
2078
2079 for (entry = head; entry;)
2080 {
2081 apuinfo_list *next = entry->next;
2082 free (entry);
2083 entry = next;
2084 }
2085
2086 head = NULL;
2087 }
2088
2089 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2090 #define APUINFO_LABEL "APUinfo"
2091
2092 /* Scan the input BFDs and create a linked list of
2093 the APUinfo values that will need to be emitted. */
2094
2095 static void
2096 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2097 {
2098 bfd *ibfd;
2099 asection *asec;
2100 char *buffer;
2101 unsigned num_input_sections;
2102 bfd_size_type output_section_size;
2103 unsigned i;
2104 unsigned num_entries;
2105 unsigned long offset;
2106 unsigned long length;
2107 const char *error_message = NULL;
2108
2109 if (link_info == NULL)
2110 return;
2111
2112 /* Scan the input bfds, looking for apuinfo sections. */
2113 num_input_sections = 0;
2114 output_section_size = 0;
2115
2116 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2117 {
2118 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2119 if (asec)
2120 {
2121 ++ num_input_sections;
2122 output_section_size += asec->size;
2123 }
2124 }
2125
2126 /* We need at least one input sections
2127 in order to make merging worthwhile. */
2128 if (num_input_sections < 1)
2129 return;
2130
2131 /* Just make sure that the output section exists as well. */
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133 if (asec == NULL)
2134 return;
2135
2136 /* Allocate a buffer for the contents of the input sections. */
2137 buffer = bfd_malloc (output_section_size);
2138 if (buffer == NULL)
2139 return;
2140
2141 offset = 0;
2142 apuinfo_list_init ();
2143
2144 /* Read in the input sections contents. */
2145 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2146 {
2147 unsigned long datum;
2148 char *ptr;
2149
2150 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2151 if (asec == NULL)
2152 continue;
2153
2154 length = asec->size;
2155 if (length < 24)
2156 {
2157 error_message = _("corrupt or empty %s section in %B");
2158 goto fail;
2159 }
2160
2161 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2162 || (bfd_bread (buffer + offset, length, ibfd) != length))
2163 {
2164 error_message = _("unable to read in %s section from %B");
2165 goto fail;
2166 }
2167
2168 /* Process the contents of the section. */
2169 ptr = buffer + offset;
2170 error_message = _("corrupt %s section in %B");
2171
2172 /* Verify the contents of the header. Note - we have to
2173 extract the values this way in order to allow for a
2174 host whose endian-ness is different from the target. */
2175 datum = bfd_get_32 (ibfd, ptr);
2176 if (datum != sizeof APUINFO_LABEL)
2177 goto fail;
2178
2179 datum = bfd_get_32 (ibfd, ptr + 8);
2180 if (datum != 0x2)
2181 goto fail;
2182
2183 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2184 goto fail;
2185
2186 /* Get the number of bytes used for apuinfo entries. */
2187 datum = bfd_get_32 (ibfd, ptr + 4);
2188 if (datum + 20 != length)
2189 goto fail;
2190
2191 /* Make sure that we do not run off the end of the section. */
2192 if (offset + length > output_section_size)
2193 goto fail;
2194
2195 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2196 for (i = 0; i < datum; i += 4)
2197 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2198
2199 /* Update the offset. */
2200 offset += length;
2201 }
2202
2203 error_message = NULL;
2204
2205 /* Compute the size of the output section. */
2206 num_entries = apuinfo_list_length ();
2207 output_section_size = 20 + num_entries * 4;
2208
2209 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2210
2211 if (! bfd_set_section_size (abfd, asec, output_section_size))
2212 ibfd = abfd,
2213 error_message = _("warning: unable to set size of %s section in %B");
2214
2215 fail:
2216 free (buffer);
2217
2218 if (error_message)
2219 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2220 }
2221
2222 /* Prevent the output section from accumulating the input sections'
2223 contents. We have already stored this in our linked list structure. */
2224
2225 static bfd_boolean
2226 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2227 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2228 asection *asec,
2229 bfd_byte *contents ATTRIBUTE_UNUSED)
2230 {
2231 return (apuinfo_list_length ()
2232 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2233 }
2234
2235 /* Finally we can generate the output section. */
2236
2237 static void
2238 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2239 {
2240 bfd_byte *buffer;
2241 asection *asec;
2242 unsigned i;
2243 unsigned num_entries;
2244 bfd_size_type length;
2245
2246 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2247 if (asec == NULL)
2248 return;
2249
2250 if (apuinfo_list_length () == 0)
2251 return;
2252
2253 length = asec->size;
2254 if (length < 20)
2255 return;
2256
2257 buffer = bfd_malloc (length);
2258 if (buffer == NULL)
2259 {
2260 (*_bfd_error_handler)
2261 (_("failed to allocate space for new APUinfo section."));
2262 return;
2263 }
2264
2265 /* Create the apuinfo header. */
2266 num_entries = apuinfo_list_length ();
2267 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2268 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2269 bfd_put_32 (abfd, 0x2, buffer + 8);
2270 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2271
2272 length = 20;
2273 for (i = 0; i < num_entries; i++)
2274 {
2275 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2276 length += 4;
2277 }
2278
2279 if (length != asec->size)
2280 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2281
2282 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2283 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2284
2285 free (buffer);
2286
2287 apuinfo_list_finish ();
2288 }
2289 \f
2290 /* The following functions are specific to the ELF linker, while
2291 functions above are used generally. They appear in this file more
2292 or less in the order in which they are called. eg.
2293 ppc_elf_check_relocs is called early in the link process,
2294 ppc_elf_finish_dynamic_sections is one of the last functions
2295 called. */
2296
2297 /* The PPC linker needs to keep track of the number of relocs that it
2298 decides to copy as dynamic relocs in check_relocs for each symbol.
2299 This is so that it can later discard them if they are found to be
2300 unnecessary. We store the information in a field extending the
2301 regular ELF linker hash table. */
2302
2303 struct ppc_elf_dyn_relocs
2304 {
2305 struct ppc_elf_dyn_relocs *next;
2306
2307 /* The input section of the reloc. */
2308 asection *sec;
2309
2310 /* Total number of relocs copied for the input section. */
2311 bfd_size_type count;
2312
2313 /* Number of pc-relative relocs copied for the input section. */
2314 bfd_size_type pc_count;
2315 };
2316
2317 /* Track PLT entries needed for a given symbol. We might need more
2318 than one glink entry per symbol. */
2319 struct plt_entry
2320 {
2321 struct plt_entry *next;
2322
2323 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2324 This field stores the offset into .got2 used to initialise the
2325 GOT pointer reg. It will always be at least 32768 (and for
2326 current gcc this is the only offset used). */
2327 bfd_vma addend;
2328
2329 /* The .got2 section. */
2330 asection *sec;
2331
2332 /* PLT refcount or offset. */
2333 union
2334 {
2335 bfd_signed_vma refcount;
2336 bfd_vma offset;
2337 } plt;
2338
2339 /* .glink stub offset. */
2340 bfd_vma glink_offset;
2341 };
2342
2343 /* Of those relocs that might be copied as dynamic relocs, this macro
2344 selects those that must be copied when linking a shared library,
2345 even when the symbol is local. */
2346
2347 #define MUST_BE_DYN_RELOC(RTYPE) \
2348 ((RTYPE) != R_PPC_REL24 \
2349 && (RTYPE) != R_PPC_REL14 \
2350 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2351 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2352 && (RTYPE) != R_PPC_REL32)
2353
2354 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2355 copying dynamic variables from a shared lib into an app's dynbss
2356 section, and instead use a dynamic relocation to point into the
2357 shared lib. */
2358 #define ELIMINATE_COPY_RELOCS 1
2359
2360 /* PPC ELF linker hash entry. */
2361
2362 struct ppc_elf_link_hash_entry
2363 {
2364 struct elf_link_hash_entry elf;
2365
2366 /* If this symbol is used in the linker created sections, the processor
2367 specific backend uses this field to map the field into the offset
2368 from the beginning of the section. */
2369 elf_linker_section_pointers_t *linker_section_pointer;
2370
2371 /* Track dynamic relocs copied for this symbol. */
2372 struct ppc_elf_dyn_relocs *dyn_relocs;
2373
2374 /* Contexts in which symbol is used in the GOT (or TOC).
2375 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2376 corresponding relocs are encountered during check_relocs.
2377 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2378 indicate the corresponding GOT entry type is not needed. */
2379 #define TLS_GD 1 /* GD reloc. */
2380 #define TLS_LD 2 /* LD reloc. */
2381 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2382 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2383 #define TLS_TLS 16 /* Any TLS reloc. */
2384 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2385 char tls_mask;
2386
2387 /* Nonzero if we have seen a small data relocation referring to this
2388 symbol. */
2389 unsigned char has_sda_refs;
2390 };
2391
2392 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2393
2394 /* PPC ELF linker hash table. */
2395
2396 struct ppc_elf_link_hash_table
2397 {
2398 struct elf_link_hash_table elf;
2399
2400 /* Short-cuts to get to dynamic linker sections. */
2401 asection *got;
2402 asection *relgot;
2403 asection *glink;
2404 asection *plt;
2405 asection *relplt;
2406 asection *dynbss;
2407 asection *relbss;
2408 asection *dynsbss;
2409 asection *relsbss;
2410 elf_linker_section_t sdata[2];
2411 asection *sbss;
2412
2413 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2414 asection *srelplt2;
2415
2416 /* The .got.plt section (VxWorks only)*/
2417 asection *sgotplt;
2418
2419 /* Shortcut to .__tls_get_addr. */
2420 struct elf_link_hash_entry *tls_get_addr;
2421
2422 /* The bfd that forced an old-style PLT. */
2423 bfd *old_bfd;
2424
2425 /* TLS local dynamic got entry handling. */
2426 union {
2427 bfd_signed_vma refcount;
2428 bfd_vma offset;
2429 } tlsld_got;
2430
2431 /* Offset of PltResolve function in glink. */
2432 bfd_vma glink_pltresolve;
2433
2434 /* Size of reserved GOT entries. */
2435 unsigned int got_header_size;
2436 /* Non-zero if allocating the header left a gap. */
2437 unsigned int got_gap;
2438
2439 /* The type of PLT we have chosen to use. */
2440 enum ppc_elf_plt_type plt_type;
2441
2442 /* Set if we should emit symbols for stubs. */
2443 unsigned int emit_stub_syms:1;
2444
2445 /* True if the target system is VxWorks. */
2446 unsigned int is_vxworks:1;
2447
2448 /* The size of PLT entries. */
2449 int plt_entry_size;
2450 /* The distance between adjacent PLT slots. */
2451 int plt_slot_size;
2452 /* The size of the first PLT entry. */
2453 int plt_initial_entry_size;
2454
2455 /* Small local sym to section mapping cache. */
2456 struct sym_sec_cache sym_sec;
2457 };
2458
2459 /* Get the PPC ELF linker hash table from a link_info structure. */
2460
2461 #define ppc_elf_hash_table(p) \
2462 ((struct ppc_elf_link_hash_table *) (p)->hash)
2463
2464 /* Create an entry in a PPC ELF linker hash table. */
2465
2466 static struct bfd_hash_entry *
2467 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2468 struct bfd_hash_table *table,
2469 const char *string)
2470 {
2471 /* Allocate the structure if it has not already been allocated by a
2472 subclass. */
2473 if (entry == NULL)
2474 {
2475 entry = bfd_hash_allocate (table,
2476 sizeof (struct ppc_elf_link_hash_entry));
2477 if (entry == NULL)
2478 return entry;
2479 }
2480
2481 /* Call the allocation method of the superclass. */
2482 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2483 if (entry != NULL)
2484 {
2485 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2486 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2487 ppc_elf_hash_entry (entry)->tls_mask = 0;
2488 }
2489
2490 return entry;
2491 }
2492
2493 /* Create a PPC ELF linker hash table. */
2494
2495 static struct bfd_link_hash_table *
2496 ppc_elf_link_hash_table_create (bfd *abfd)
2497 {
2498 struct ppc_elf_link_hash_table *ret;
2499
2500 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2501 if (ret == NULL)
2502 return NULL;
2503
2504 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2505 ppc_elf_link_hash_newfunc,
2506 sizeof (struct ppc_elf_link_hash_entry)))
2507 {
2508 free (ret);
2509 return NULL;
2510 }
2511
2512 ret->elf.init_plt_refcount.refcount = 0;
2513 ret->elf.init_plt_refcount.glist = NULL;
2514 ret->elf.init_plt_offset.offset = 0;
2515 ret->elf.init_plt_offset.glist = NULL;
2516
2517 ret->sdata[0].name = ".sdata";
2518 ret->sdata[0].sym_name = "_SDA_BASE_";
2519 ret->sdata[0].bss_name = ".sbss";
2520
2521 ret->sdata[1].name = ".sdata2";
2522 ret->sdata[1].sym_name = "_SDA2_BASE_";
2523 ret->sdata[1].bss_name = ".sbss2";
2524
2525 ret->plt_entry_size = 12;
2526 ret->plt_slot_size = 8;
2527 ret->plt_initial_entry_size = 72;
2528
2529 return &ret->elf.root;
2530 }
2531
2532 /* Create .got and the related sections. */
2533
2534 static bfd_boolean
2535 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2536 {
2537 struct ppc_elf_link_hash_table *htab;
2538 asection *s;
2539 flagword flags;
2540
2541 if (!_bfd_elf_create_got_section (abfd, info))
2542 return FALSE;
2543
2544 htab = ppc_elf_hash_table (info);
2545 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2546 if (s == NULL)
2547 abort ();
2548
2549 if (htab->is_vxworks)
2550 {
2551 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2552 if (!htab->sgotplt)
2553 abort ();
2554 }
2555 else
2556 {
2557 /* The powerpc .got has a blrl instruction in it. Mark it
2558 executable. */
2559 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2560 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2561 if (!bfd_set_section_flags (abfd, s, flags))
2562 return FALSE;
2563 }
2564
2565 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2566 | SEC_LINKER_CREATED | SEC_READONLY);
2567 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2568 if (!htab->relgot
2569 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2570 return FALSE;
2571
2572 return TRUE;
2573 }
2574
2575 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2576 to output sections (just like _bfd_elf_create_dynamic_sections has
2577 to create .dynbss and .rela.bss). */
2578
2579 static bfd_boolean
2580 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2581 {
2582 struct ppc_elf_link_hash_table *htab;
2583 asection *s;
2584 flagword flags;
2585
2586 htab = ppc_elf_hash_table (info);
2587
2588 if (htab->got == NULL
2589 && !ppc_elf_create_got (abfd, info))
2590 return FALSE;
2591
2592 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2593 return FALSE;
2594
2595 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2596 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2597
2598 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2599 htab->glink = s;
2600 if (s == NULL
2601 || !bfd_set_section_alignment (abfd, s, 4))
2602 return FALSE;
2603
2604 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2605 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2606 SEC_ALLOC | SEC_LINKER_CREATED);
2607 htab->dynsbss = s;
2608 if (s == NULL)
2609 return FALSE;
2610
2611 if (! info->shared)
2612 {
2613 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2614 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2615 htab->relsbss = s;
2616 if (s == NULL
2617 || ! bfd_set_section_alignment (abfd, s, 2))
2618 return FALSE;
2619 }
2620
2621 if (htab->is_vxworks
2622 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2623 return FALSE;
2624
2625 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2626 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2627 if (s == NULL)
2628 abort ();
2629
2630 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2631 if (htab->plt_type == PLT_VXWORKS)
2632 /* The VxWorks PLT is a loaded section with contents. */
2633 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2634 return bfd_set_section_flags (abfd, s, flags);
2635 }
2636
2637 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2638
2639 static void
2640 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2641 struct elf_link_hash_entry *dir,
2642 struct elf_link_hash_entry *ind)
2643 {
2644 struct ppc_elf_link_hash_entry *edir, *eind;
2645
2646 edir = (struct ppc_elf_link_hash_entry *) dir;
2647 eind = (struct ppc_elf_link_hash_entry *) ind;
2648
2649 if (eind->dyn_relocs != NULL)
2650 {
2651 if (edir->dyn_relocs != NULL)
2652 {
2653 struct ppc_elf_dyn_relocs **pp;
2654 struct ppc_elf_dyn_relocs *p;
2655
2656 /* Add reloc counts against the indirect sym to the direct sym
2657 list. Merge any entries against the same section. */
2658 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2659 {
2660 struct ppc_elf_dyn_relocs *q;
2661
2662 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2663 if (q->sec == p->sec)
2664 {
2665 q->pc_count += p->pc_count;
2666 q->count += p->count;
2667 *pp = p->next;
2668 break;
2669 }
2670 if (q == NULL)
2671 pp = &p->next;
2672 }
2673 *pp = edir->dyn_relocs;
2674 }
2675
2676 edir->dyn_relocs = eind->dyn_relocs;
2677 eind->dyn_relocs = NULL;
2678 }
2679
2680 edir->tls_mask |= eind->tls_mask;
2681 edir->has_sda_refs |= eind->has_sda_refs;
2682
2683 /* If called to transfer flags for a weakdef during processing
2684 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2685 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2686 if (!(ELIMINATE_COPY_RELOCS
2687 && eind->elf.root.type != bfd_link_hash_indirect
2688 && edir->elf.dynamic_adjusted))
2689 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2690
2691 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2692 edir->elf.ref_regular |= eind->elf.ref_regular;
2693 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2694 edir->elf.needs_plt |= eind->elf.needs_plt;
2695
2696 /* If we were called to copy over info for a weak sym, that's all. */
2697 if (eind->elf.root.type != bfd_link_hash_indirect)
2698 return;
2699
2700 /* Copy over the GOT refcount entries that we may have already seen to
2701 the symbol which just became indirect. */
2702 edir->elf.got.refcount += eind->elf.got.refcount;
2703 eind->elf.got.refcount = 0;
2704
2705 /* And plt entries. */
2706 if (eind->elf.plt.plist != NULL)
2707 {
2708 if (edir->elf.plt.plist != NULL)
2709 {
2710 struct plt_entry **entp;
2711 struct plt_entry *ent;
2712
2713 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2714 {
2715 struct plt_entry *dent;
2716
2717 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2718 if (dent->sec == ent->sec && dent->addend == ent->addend)
2719 {
2720 dent->plt.refcount += ent->plt.refcount;
2721 *entp = ent->next;
2722 break;
2723 }
2724 if (dent == NULL)
2725 entp = &ent->next;
2726 }
2727 *entp = edir->elf.plt.plist;
2728 }
2729
2730 edir->elf.plt.plist = eind->elf.plt.plist;
2731 eind->elf.plt.plist = NULL;
2732 }
2733
2734 if (eind->elf.dynindx != -1)
2735 {
2736 if (edir->elf.dynindx != -1)
2737 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2738 edir->elf.dynstr_index);
2739 edir->elf.dynindx = eind->elf.dynindx;
2740 edir->elf.dynstr_index = eind->elf.dynstr_index;
2741 eind->elf.dynindx = -1;
2742 eind->elf.dynstr_index = 0;
2743 }
2744 }
2745
2746 /* Return 1 if target is one of ours. */
2747
2748 static bfd_boolean
2749 is_ppc_elf_target (const struct bfd_target *targ)
2750 {
2751 extern const bfd_target bfd_elf32_powerpc_vec;
2752 extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
2753 extern const bfd_target bfd_elf32_powerpcle_vec;
2754
2755 return (targ == &bfd_elf32_powerpc_vec
2756 || targ == &bfd_elf32_powerpc_vxworks_vec
2757 || targ == &bfd_elf32_powerpcle_vec);
2758 }
2759
2760 /* Hook called by the linker routine which adds symbols from an object
2761 file. We use it to put .comm items in .sbss, and not .bss. */
2762
2763 static bfd_boolean
2764 ppc_elf_add_symbol_hook (bfd *abfd,
2765 struct bfd_link_info *info,
2766 Elf_Internal_Sym *sym,
2767 const char **namep ATTRIBUTE_UNUSED,
2768 flagword *flagsp ATTRIBUTE_UNUSED,
2769 asection **secp,
2770 bfd_vma *valp)
2771 {
2772 if (sym->st_shndx == SHN_COMMON
2773 && !info->relocatable
2774 && sym->st_size <= elf_gp_size (abfd)
2775 && is_ppc_elf_target (info->output_bfd->xvec))
2776 {
2777 /* Common symbols less than or equal to -G nn bytes are automatically
2778 put into .sbss. */
2779 struct ppc_elf_link_hash_table *htab;
2780
2781 htab = ppc_elf_hash_table (info);
2782 if (htab->sbss == NULL)
2783 {
2784 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2785
2786 if (!htab->elf.dynobj)
2787 htab->elf.dynobj = abfd;
2788
2789 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2790 ".sbss",
2791 flags);
2792 if (htab->sbss == NULL)
2793 return FALSE;
2794 }
2795
2796 *secp = htab->sbss;
2797 *valp = sym->st_size;
2798 }
2799
2800 return TRUE;
2801 }
2802 \f
2803 static bfd_boolean
2804 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2805 elf_linker_section_t *lsect)
2806 {
2807 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2808 TRUE, FALSE, TRUE);
2809 if (lsect->sym == NULL)
2810 return FALSE;
2811 if (lsect->sym->root.type == bfd_link_hash_new)
2812 lsect->sym->non_elf = 0;
2813 lsect->sym->ref_regular = 1;
2814 return TRUE;
2815 }
2816
2817 /* Create a special linker section. */
2818
2819 static bfd_boolean
2820 ppc_elf_create_linker_section (bfd *abfd,
2821 struct bfd_link_info *info,
2822 flagword flags,
2823 elf_linker_section_t *lsect)
2824 {
2825 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2826 asection *s;
2827
2828 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2829 | SEC_LINKER_CREATED);
2830
2831 /* Record the first bfd that needs the special sections. */
2832 if (!htab->elf.dynobj)
2833 htab->elf.dynobj = abfd;
2834
2835 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2836 lsect->name,
2837 flags);
2838 if (s == NULL
2839 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2840 return FALSE;
2841 lsect->section = s;
2842
2843 return create_sdata_sym (htab, lsect);
2844 }
2845
2846 /* Find a linker generated pointer with a given addend and type. */
2847
2848 static elf_linker_section_pointers_t *
2849 elf_find_pointer_linker_section
2850 (elf_linker_section_pointers_t *linker_pointers,
2851 bfd_vma addend,
2852 elf_linker_section_t *lsect)
2853 {
2854 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2855 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2856 return linker_pointers;
2857
2858 return NULL;
2859 }
2860
2861 /* Allocate a pointer to live in a linker created section. */
2862
2863 static bfd_boolean
2864 elf_create_pointer_linker_section (bfd *abfd,
2865 elf_linker_section_t *lsect,
2866 struct elf_link_hash_entry *h,
2867 const Elf_Internal_Rela *rel)
2868 {
2869 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2870 elf_linker_section_pointers_t *linker_section_ptr;
2871 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2872 bfd_size_type amt;
2873
2874 BFD_ASSERT (lsect != NULL);
2875
2876 /* Is this a global symbol? */
2877 if (h != NULL)
2878 {
2879 struct ppc_elf_link_hash_entry *eh;
2880
2881 /* Has this symbol already been allocated? If so, our work is done. */
2882 eh = (struct ppc_elf_link_hash_entry *) h;
2883 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2884 rel->r_addend,
2885 lsect))
2886 return TRUE;
2887
2888 ptr_linker_section_ptr = &eh->linker_section_pointer;
2889 }
2890 else
2891 {
2892 BFD_ASSERT (is_ppc_elf_target (abfd->xvec));
2893
2894 /* Allocation of a pointer to a local symbol. */
2895 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2896
2897 /* Allocate a table to hold the local symbols if first time. */
2898 if (!ptr)
2899 {
2900 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
2901
2902 amt = num_symbols;
2903 amt *= sizeof (elf_linker_section_pointers_t *);
2904 ptr = bfd_zalloc (abfd, amt);
2905
2906 if (!ptr)
2907 return FALSE;
2908
2909 elf_local_ptr_offsets (abfd) = ptr;
2910 }
2911
2912 /* Has this symbol already been allocated? If so, our work is done. */
2913 if (elf_find_pointer_linker_section (ptr[r_symndx],
2914 rel->r_addend,
2915 lsect))
2916 return TRUE;
2917
2918 ptr_linker_section_ptr = &ptr[r_symndx];
2919 }
2920
2921 /* Allocate space for a pointer in the linker section, and allocate
2922 a new pointer record from internal memory. */
2923 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2924 amt = sizeof (elf_linker_section_pointers_t);
2925 linker_section_ptr = bfd_alloc (abfd, amt);
2926
2927 if (!linker_section_ptr)
2928 return FALSE;
2929
2930 linker_section_ptr->next = *ptr_linker_section_ptr;
2931 linker_section_ptr->addend = rel->r_addend;
2932 linker_section_ptr->lsect = lsect;
2933 *ptr_linker_section_ptr = linker_section_ptr;
2934
2935 linker_section_ptr->offset = lsect->section->size;
2936 lsect->section->size += 4;
2937
2938 #ifdef DEBUG
2939 fprintf (stderr,
2940 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2941 lsect->name, (long) linker_section_ptr->offset,
2942 (long) lsect->section->size);
2943 #endif
2944
2945 return TRUE;
2946 }
2947
2948 static bfd_boolean
2949 update_local_sym_info (bfd *abfd,
2950 Elf_Internal_Shdr *symtab_hdr,
2951 unsigned long r_symndx,
2952 int tls_type)
2953 {
2954 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2955 char *local_got_tls_masks;
2956
2957 if (local_got_refcounts == NULL)
2958 {
2959 bfd_size_type size = symtab_hdr->sh_info;
2960
2961 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2962 local_got_refcounts = bfd_zalloc (abfd, size);
2963 if (local_got_refcounts == NULL)
2964 return FALSE;
2965 elf_local_got_refcounts (abfd) = local_got_refcounts;
2966 }
2967
2968 local_got_refcounts[r_symndx] += 1;
2969 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2970 local_got_tls_masks[r_symndx] |= tls_type;
2971 return TRUE;
2972 }
2973
2974 static bfd_boolean
2975 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2976 asection *sec, bfd_vma addend)
2977 {
2978 struct plt_entry *ent;
2979
2980 if (addend < 32768)
2981 sec = NULL;
2982 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2983 if (ent->sec == sec && ent->addend == addend)
2984 break;
2985 if (ent == NULL)
2986 {
2987 bfd_size_type amt = sizeof (*ent);
2988 ent = bfd_alloc (abfd, amt);
2989 if (ent == NULL)
2990 return FALSE;
2991 ent->next = h->plt.plist;
2992 ent->sec = sec;
2993 ent->addend = addend;
2994 ent->plt.refcount = 0;
2995 h->plt.plist = ent;
2996 }
2997 ent->plt.refcount += 1;
2998 return TRUE;
2999 }
3000
3001 static struct plt_entry *
3002 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3003 {
3004 struct plt_entry *ent;
3005
3006 if (addend < 32768)
3007 sec = NULL;
3008 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3009 if (ent->sec == sec && ent->addend == addend)
3010 break;
3011 return ent;
3012 }
3013
3014 static void
3015 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3016 {
3017 (*_bfd_error_handler)
3018 (_("%B: relocation %s cannot be used when making a shared object"),
3019 abfd,
3020 ppc_elf_howto_table[r_type]->name);
3021 bfd_set_error (bfd_error_bad_value);
3022 }
3023
3024 /* Look through the relocs for a section during the first phase, and
3025 allocate space in the global offset table or procedure linkage
3026 table. */
3027
3028 static bfd_boolean
3029 ppc_elf_check_relocs (bfd *abfd,
3030 struct bfd_link_info *info,
3031 asection *sec,
3032 const Elf_Internal_Rela *relocs)
3033 {
3034 struct ppc_elf_link_hash_table *htab;
3035 Elf_Internal_Shdr *symtab_hdr;
3036 struct elf_link_hash_entry **sym_hashes;
3037 const Elf_Internal_Rela *rel;
3038 const Elf_Internal_Rela *rel_end;
3039 asection *got2, *sreloc;
3040
3041 if (info->relocatable)
3042 return TRUE;
3043
3044 /* Don't do anything special with non-loaded, non-alloced sections.
3045 In particular, any relocs in such sections should not affect GOT
3046 and PLT reference counting (ie. we don't allow them to create GOT
3047 or PLT entries), there's no possibility or desire to optimize TLS
3048 relocs, and there's not much point in propagating relocs to shared
3049 libs that the dynamic linker won't relocate. */
3050 if ((sec->flags & SEC_ALLOC) == 0)
3051 return TRUE;
3052
3053 #ifdef DEBUG
3054 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3055 sec, abfd);
3056 #endif
3057
3058 BFD_ASSERT (is_ppc_elf_target (abfd->xvec));
3059
3060 /* Initialize howto table if not already done. */
3061 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3062 ppc_elf_howto_init ();
3063
3064 htab = ppc_elf_hash_table (info);
3065 symtab_hdr = &elf_symtab_hdr (abfd);
3066 sym_hashes = elf_sym_hashes (abfd);
3067 got2 = bfd_get_section_by_name (abfd, ".got2");
3068 sreloc = NULL;
3069
3070 rel_end = relocs + sec->reloc_count;
3071 for (rel = relocs; rel < rel_end; rel++)
3072 {
3073 unsigned long r_symndx;
3074 enum elf_ppc_reloc_type r_type;
3075 struct elf_link_hash_entry *h;
3076 int tls_type = 0;
3077
3078 r_symndx = ELF32_R_SYM (rel->r_info);
3079 if (r_symndx < symtab_hdr->sh_info)
3080 h = NULL;
3081 else
3082 {
3083 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3084 while (h->root.type == bfd_link_hash_indirect
3085 || h->root.type == bfd_link_hash_warning)
3086 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3087 }
3088
3089 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3090 This shows up in particular in an R_PPC_ADDR32 in the eabi
3091 startup code. */
3092 if (h != NULL
3093 && htab->got == NULL
3094 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3095 {
3096 if (htab->elf.dynobj == NULL)
3097 htab->elf.dynobj = abfd;
3098 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3099 return FALSE;
3100 BFD_ASSERT (h == htab->elf.hgot);
3101 }
3102
3103 r_type = ELF32_R_TYPE (rel->r_info);
3104 switch (r_type)
3105 {
3106 case R_PPC_GOT_TLSLD16:
3107 case R_PPC_GOT_TLSLD16_LO:
3108 case R_PPC_GOT_TLSLD16_HI:
3109 case R_PPC_GOT_TLSLD16_HA:
3110 tls_type = TLS_TLS | TLS_LD;
3111 goto dogottls;
3112
3113 case R_PPC_GOT_TLSGD16:
3114 case R_PPC_GOT_TLSGD16_LO:
3115 case R_PPC_GOT_TLSGD16_HI:
3116 case R_PPC_GOT_TLSGD16_HA:
3117 tls_type = TLS_TLS | TLS_GD;
3118 goto dogottls;
3119
3120 case R_PPC_GOT_TPREL16:
3121 case R_PPC_GOT_TPREL16_LO:
3122 case R_PPC_GOT_TPREL16_HI:
3123 case R_PPC_GOT_TPREL16_HA:
3124 if (info->shared)
3125 info->flags |= DF_STATIC_TLS;
3126 tls_type = TLS_TLS | TLS_TPREL;
3127 goto dogottls;
3128
3129 case R_PPC_GOT_DTPREL16:
3130 case R_PPC_GOT_DTPREL16_LO:
3131 case R_PPC_GOT_DTPREL16_HI:
3132 case R_PPC_GOT_DTPREL16_HA:
3133 tls_type = TLS_TLS | TLS_DTPREL;
3134 dogottls:
3135 sec->has_tls_reloc = 1;
3136 /* Fall thru */
3137
3138 /* GOT16 relocations */
3139 case R_PPC_GOT16:
3140 case R_PPC_GOT16_LO:
3141 case R_PPC_GOT16_HI:
3142 case R_PPC_GOT16_HA:
3143 /* This symbol requires a global offset table entry. */
3144 if (htab->got == NULL)
3145 {
3146 if (htab->elf.dynobj == NULL)
3147 htab->elf.dynobj = abfd;
3148 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3149 return FALSE;
3150 }
3151 if (h != NULL)
3152 {
3153 h->got.refcount += 1;
3154 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3155 }
3156 else
3157 /* This is a global offset table entry for a local symbol. */
3158 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3159 return FALSE;
3160 break;
3161
3162 /* Indirect .sdata relocation. */
3163 case R_PPC_EMB_SDAI16:
3164 if (info->shared)
3165 {
3166 bad_shared_reloc (abfd, r_type);
3167 return FALSE;
3168 }
3169 if (htab->sdata[0].section == NULL
3170 && !ppc_elf_create_linker_section (abfd, info, 0,
3171 &htab->sdata[0]))
3172 return FALSE;
3173 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3174 h, rel))
3175 return FALSE;
3176 if (h != NULL)
3177 {
3178 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3179 h->non_got_ref = TRUE;
3180 }
3181 break;
3182
3183 /* Indirect .sdata2 relocation. */
3184 case R_PPC_EMB_SDA2I16:
3185 if (info->shared)
3186 {
3187 bad_shared_reloc (abfd, r_type);
3188 return FALSE;
3189 }
3190 if (htab->sdata[1].section == NULL
3191 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3192 &htab->sdata[1]))
3193 return FALSE;
3194 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3195 h, rel))
3196 return FALSE;
3197 if (h != NULL)
3198 {
3199 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3200 h->non_got_ref = TRUE;
3201 }
3202 break;
3203
3204 case R_PPC_SDAREL16:
3205 if (info->shared)
3206 {
3207 bad_shared_reloc (abfd, r_type);
3208 return FALSE;
3209 }
3210 if (htab->sdata[0].sym == NULL
3211 && !create_sdata_sym (htab, &htab->sdata[0]))
3212 return FALSE;
3213 if (h != NULL)
3214 {
3215 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3216 h->non_got_ref = TRUE;
3217 }
3218 break;
3219
3220 case R_PPC_EMB_SDA2REL:
3221 if (info->shared)
3222 {
3223 bad_shared_reloc (abfd, r_type);
3224 return FALSE;
3225 }
3226 if (htab->sdata[1].sym == NULL
3227 && !create_sdata_sym (htab, &htab->sdata[1]))
3228 return FALSE;
3229 if (h != NULL)
3230 {
3231 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3232 h->non_got_ref = TRUE;
3233 }
3234 break;
3235
3236 case R_PPC_EMB_SDA21:
3237 case R_PPC_EMB_RELSDA:
3238 if (info->shared)
3239 {
3240 bad_shared_reloc (abfd, r_type);
3241 return FALSE;
3242 }
3243 if (htab->sdata[0].sym == NULL
3244 && !create_sdata_sym (htab, &htab->sdata[0]))
3245 return FALSE;
3246 if (htab->sdata[1].sym == NULL
3247 && !create_sdata_sym (htab, &htab->sdata[1]))
3248 return FALSE;
3249 if (h != NULL)
3250 {
3251 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3252 h->non_got_ref = TRUE;
3253 }
3254 break;
3255
3256 case R_PPC_EMB_NADDR32:
3257 case R_PPC_EMB_NADDR16:
3258 case R_PPC_EMB_NADDR16_LO:
3259 case R_PPC_EMB_NADDR16_HI:
3260 case R_PPC_EMB_NADDR16_HA:
3261 if (info->shared)
3262 {
3263 bad_shared_reloc (abfd, r_type);
3264 return FALSE;
3265 }
3266 if (h != NULL)
3267 h->non_got_ref = TRUE;
3268 break;
3269
3270 case R_PPC_PLT32:
3271 case R_PPC_PLTREL24:
3272 case R_PPC_PLTREL32:
3273 case R_PPC_PLT16_LO:
3274 case R_PPC_PLT16_HI:
3275 case R_PPC_PLT16_HA:
3276 #ifdef DEBUG
3277 fprintf (stderr, "Reloc requires a PLT entry\n");
3278 #endif
3279 /* This symbol requires a procedure linkage table entry. We
3280 actually build the entry in finish_dynamic_symbol,
3281 because this might be a case of linking PIC code without
3282 linking in any dynamic objects, in which case we don't
3283 need to generate a procedure linkage table after all. */
3284
3285 if (h == NULL)
3286 {
3287 /* It does not make sense to have a procedure linkage
3288 table entry for a local symbol. */
3289 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3290 "local symbol"),
3291 abfd,
3292 sec,
3293 (long) rel->r_offset,
3294 ppc_elf_howto_table[r_type]->name);
3295 bfd_set_error (bfd_error_bad_value);
3296 return FALSE;
3297 }
3298 else
3299 {
3300 bfd_vma addend = 0;
3301
3302 if (r_type == R_PPC_PLTREL24)
3303 {
3304 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3305 addend = rel->r_addend;
3306 }
3307 h->needs_plt = 1;
3308 if (!update_plt_info (abfd, h, got2, addend))
3309 return FALSE;
3310 }
3311 break;
3312
3313 /* The following relocations don't need to propagate the
3314 relocation if linking a shared object since they are
3315 section relative. */
3316 case R_PPC_SECTOFF:
3317 case R_PPC_SECTOFF_LO:
3318 case R_PPC_SECTOFF_HI:
3319 case R_PPC_SECTOFF_HA:
3320 case R_PPC_DTPREL16:
3321 case R_PPC_DTPREL16_LO:
3322 case R_PPC_DTPREL16_HI:
3323 case R_PPC_DTPREL16_HA:
3324 case R_PPC_TOC16:
3325 break;
3326
3327 case R_PPC_REL16:
3328 case R_PPC_REL16_LO:
3329 case R_PPC_REL16_HI:
3330 case R_PPC_REL16_HA:
3331 ppc_elf_tdata (abfd)->has_rel16 = 1;
3332 break;
3333
3334 /* These are just markers. */
3335 case R_PPC_TLS:
3336 case R_PPC_EMB_MRKREF:
3337 case R_PPC_NONE:
3338 case R_PPC_max:
3339 break;
3340
3341 /* These should only appear in dynamic objects. */
3342 case R_PPC_COPY:
3343 case R_PPC_GLOB_DAT:
3344 case R_PPC_JMP_SLOT:
3345 case R_PPC_RELATIVE:
3346 break;
3347
3348 /* These aren't handled yet. We'll report an error later. */
3349 case R_PPC_ADDR30:
3350 case R_PPC_EMB_RELSEC16:
3351 case R_PPC_EMB_RELST_LO:
3352 case R_PPC_EMB_RELST_HI:
3353 case R_PPC_EMB_RELST_HA:
3354 case R_PPC_EMB_BIT_FLD:
3355 break;
3356
3357 /* This refers only to functions defined in the shared library. */
3358 case R_PPC_LOCAL24PC:
3359 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3360 {
3361 htab->plt_type = PLT_OLD;
3362 htab->old_bfd = abfd;
3363 }
3364 break;
3365
3366 /* This relocation describes the C++ object vtable hierarchy.
3367 Reconstruct it for later use during GC. */
3368 case R_PPC_GNU_VTINHERIT:
3369 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3370 return FALSE;
3371 break;
3372
3373 /* This relocation describes which C++ vtable entries are actually
3374 used. Record for later use during GC. */
3375 case R_PPC_GNU_VTENTRY:
3376 BFD_ASSERT (h != NULL);
3377 if (h != NULL
3378 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3379 return FALSE;
3380 break;
3381
3382 /* We shouldn't really be seeing these. */
3383 case R_PPC_TPREL32:
3384 if (info->shared)
3385 info->flags |= DF_STATIC_TLS;
3386 goto dodyn;
3387
3388 /* Nor these. */
3389 case R_PPC_DTPMOD32:
3390 case R_PPC_DTPREL32:
3391 goto dodyn;
3392
3393 case R_PPC_TPREL16:
3394 case R_PPC_TPREL16_LO:
3395 case R_PPC_TPREL16_HI:
3396 case R_PPC_TPREL16_HA:
3397 if (info->shared)
3398 info->flags |= DF_STATIC_TLS;
3399 goto dodyn;
3400
3401 case R_PPC_REL32:
3402 if (h == NULL
3403 && got2 != NULL
3404 && (sec->flags & SEC_CODE) != 0
3405 && (info->shared || info->pie)
3406 && htab->plt_type == PLT_UNSET)
3407 {
3408 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3409 the start of a function, which assembles to a REL32
3410 reference to .got2. If we detect one of these, then
3411 force the old PLT layout because the linker cannot
3412 reliably deduce the GOT pointer value needed for
3413 PLT call stubs. */
3414 asection *s;
3415
3416 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3417 r_symndx);
3418 if (s == got2)
3419 {
3420 htab->plt_type = PLT_OLD;
3421 htab->old_bfd = abfd;
3422 }
3423 }
3424 if (h == NULL || h == htab->elf.hgot)
3425 break;
3426 goto dodyn1;
3427
3428 case R_PPC_REL24:
3429 case R_PPC_REL14:
3430 case R_PPC_REL14_BRTAKEN:
3431 case R_PPC_REL14_BRNTAKEN:
3432 if (h == NULL)
3433 break;
3434 if (h == htab->elf.hgot)
3435 {
3436 if (htab->plt_type == PLT_UNSET)
3437 {
3438 htab->plt_type = PLT_OLD;
3439 htab->old_bfd = abfd;
3440 }
3441 break;
3442 }
3443 /* fall through */
3444
3445 case R_PPC_ADDR32:
3446 case R_PPC_ADDR24:
3447 case R_PPC_ADDR16:
3448 case R_PPC_ADDR16_LO:
3449 case R_PPC_ADDR16_HI:
3450 case R_PPC_ADDR16_HA:
3451 case R_PPC_ADDR14:
3452 case R_PPC_ADDR14_BRTAKEN:
3453 case R_PPC_ADDR14_BRNTAKEN:
3454 case R_PPC_UADDR32:
3455 case R_PPC_UADDR16:
3456 dodyn1:
3457 if (h != NULL && !info->shared)
3458 {
3459 /* We may need a plt entry if the symbol turns out to be
3460 a function defined in a dynamic object. */
3461 if (!update_plt_info (abfd, h, NULL, 0))
3462 return FALSE;
3463
3464 /* We may need a copy reloc too. */
3465 h->non_got_ref = 1;
3466 }
3467
3468 dodyn:
3469 /* If we are creating a shared library, and this is a reloc
3470 against a global symbol, or a non PC relative reloc
3471 against a local symbol, then we need to copy the reloc
3472 into the shared library. However, if we are linking with
3473 -Bsymbolic, we do not need to copy a reloc against a
3474 global symbol which is defined in an object we are
3475 including in the link (i.e., DEF_REGULAR is set). At
3476 this point we have not seen all the input files, so it is
3477 possible that DEF_REGULAR is not set now but will be set
3478 later (it is never cleared). In case of a weak definition,
3479 DEF_REGULAR may be cleared later by a strong definition in
3480 a shared library. We account for that possibility below by
3481 storing information in the dyn_relocs field of the hash
3482 table entry. A similar situation occurs when creating
3483 shared libraries and symbol visibility changes render the
3484 symbol local.
3485
3486 If on the other hand, we are creating an executable, we
3487 may need to keep relocations for symbols satisfied by a
3488 dynamic library if we manage to avoid copy relocs for the
3489 symbol. */
3490 if ((info->shared
3491 && (MUST_BE_DYN_RELOC (r_type)
3492 || (h != NULL
3493 && (! info->symbolic
3494 || h->root.type == bfd_link_hash_defweak
3495 || !h->def_regular))))
3496 || (ELIMINATE_COPY_RELOCS
3497 && !info->shared
3498 && h != NULL
3499 && (h->root.type == bfd_link_hash_defweak
3500 || !h->def_regular)))
3501 {
3502 struct ppc_elf_dyn_relocs *p;
3503 struct ppc_elf_dyn_relocs **head;
3504
3505 #ifdef DEBUG
3506 fprintf (stderr,
3507 "ppc_elf_check_relocs needs to "
3508 "create relocation for %s\n",
3509 (h && h->root.root.string
3510 ? h->root.root.string : "<unknown>"));
3511 #endif
3512 if (sreloc == NULL)
3513 {
3514 const char *name;
3515
3516 name = (bfd_elf_string_from_elf_section
3517 (abfd,
3518 elf_elfheader (abfd)->e_shstrndx,
3519 elf_section_data (sec)->rel_hdr.sh_name));
3520 if (name == NULL)
3521 return FALSE;
3522
3523 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3524 && strcmp (bfd_get_section_name (abfd, sec),
3525 name + 5) == 0);
3526
3527 if (htab->elf.dynobj == NULL)
3528 htab->elf.dynobj = abfd;
3529 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3530 if (sreloc == NULL)
3531 {
3532 flagword flags;
3533
3534 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3535 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3536 | SEC_ALLOC | SEC_LOAD);
3537 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3538 name,
3539 flags);
3540 if (sreloc == NULL
3541 || ! bfd_set_section_alignment (htab->elf.dynobj,
3542 sreloc, 2))
3543 return FALSE;
3544 }
3545 elf_section_data (sec)->sreloc = sreloc;
3546 }
3547
3548 /* If this is a global symbol, we count the number of
3549 relocations we need for this symbol. */
3550 if (h != NULL)
3551 {
3552 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3553 }
3554 else
3555 {
3556 /* Track dynamic relocs needed for local syms too.
3557 We really need local syms available to do this
3558 easily. Oh well. */
3559
3560 asection *s;
3561 void *vpp;
3562
3563 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3564 sec, r_symndx);
3565 if (s == NULL)
3566 return FALSE;
3567
3568 vpp = &elf_section_data (s)->local_dynrel;
3569 head = (struct ppc_elf_dyn_relocs **) vpp;
3570 }
3571
3572 p = *head;
3573 if (p == NULL || p->sec != sec)
3574 {
3575 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3576 if (p == NULL)
3577 return FALSE;
3578 p->next = *head;
3579 *head = p;
3580 p->sec = sec;
3581 p->count = 0;
3582 p->pc_count = 0;
3583 }
3584
3585 p->count += 1;
3586 if (!MUST_BE_DYN_RELOC (r_type))
3587 p->pc_count += 1;
3588 }
3589
3590 break;
3591 }
3592 }
3593
3594 return TRUE;
3595 }
3596 \f
3597
3598 /* Merge object attributes from IBFD into OBFD. Raise an error if
3599 there are conflicting attributes. */
3600 static bfd_boolean
3601 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3602 {
3603 obj_attribute *in_attr, *in_attrs;
3604 obj_attribute *out_attr, *out_attrs;
3605
3606 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3607 {
3608 /* This is the first object. Copy the attributes. */
3609 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3610
3611 /* Use the Tag_null value to indicate the attributes have been
3612 initialized. */
3613 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3614
3615 return TRUE;
3616 }
3617
3618 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3619 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3620
3621 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3622 non-conflicting ones. */
3623 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3624 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3625 if (in_attr->i != out_attr->i)
3626 {
3627 out_attr->type = 1;
3628 if (out_attr->i == 0)
3629 out_attr->i = in_attr->i;
3630 else if (in_attr->i == 0)
3631 ;
3632 else if (out_attr->i == 1 && in_attr->i == 2)
3633 _bfd_error_handler
3634 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3635 else if (out_attr->i == 2 && in_attr->i == 1)
3636 _bfd_error_handler
3637 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3638 else if (in_attr->i > 2)
3639 _bfd_error_handler
3640 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3641 in_attr->i);
3642 else
3643 _bfd_error_handler
3644 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3645 out_attr->i);
3646 }
3647
3648 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3649 merge non-conflicting ones. */
3650 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3651 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3652 if (in_attr->i != out_attr->i)
3653 {
3654 const char *in_abi = NULL, *out_abi = NULL;
3655
3656 switch (in_attr->i)
3657 {
3658 case 1: in_abi = "generic"; break;
3659 case 2: in_abi = "AltiVec"; break;
3660 case 3: in_abi = "SPE"; break;
3661 }
3662
3663 switch (out_attr->i)
3664 {
3665 case 1: out_abi = "generic"; break;
3666 case 2: out_abi = "AltiVec"; break;
3667 case 3: out_abi = "SPE"; break;
3668 }
3669
3670 out_attr->type = 1;
3671 if (out_attr->i == 0)
3672 out_attr->i = in_attr->i;
3673 else if (in_attr->i == 0)
3674 ;
3675 /* For now, allow generic to transition to AltiVec or SPE
3676 without a warning. If GCC marked files with their stack
3677 alignment and used don't-care markings for files which are
3678 not affected by the vector ABI, we could warn about this
3679 case too. */
3680 else if (out_attr->i == 1)
3681 out_attr->i = in_attr->i;
3682 else if (in_attr->i == 1)
3683 ;
3684 else if (in_abi == NULL)
3685 _bfd_error_handler
3686 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3687 in_attr->i);
3688 else if (out_abi == NULL)
3689 _bfd_error_handler
3690 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3691 in_attr->i);
3692 else
3693 _bfd_error_handler
3694 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3695 ibfd, obfd, in_abi, out_abi);
3696 }
3697
3698 /* Merge Tag_compatibility attributes and any common GNU ones. */
3699 _bfd_elf_merge_object_attributes (ibfd, obfd);
3700
3701 return TRUE;
3702 }
3703
3704 /* Merge backend specific data from an object file to the output
3705 object file when linking. */
3706
3707 static bfd_boolean
3708 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3709 {
3710 flagword old_flags;
3711 flagword new_flags;
3712 bfd_boolean error;
3713
3714 if (!is_ppc_elf_target (ibfd->xvec)
3715 || !is_ppc_elf_target (obfd->xvec))
3716 return TRUE;
3717
3718 /* Check if we have the same endianess. */
3719 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3720 return FALSE;
3721
3722 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3723 return FALSE;
3724
3725 new_flags = elf_elfheader (ibfd)->e_flags;
3726 old_flags = elf_elfheader (obfd)->e_flags;
3727 if (!elf_flags_init (obfd))
3728 {
3729 /* First call, no flags set. */
3730 elf_flags_init (obfd) = TRUE;
3731 elf_elfheader (obfd)->e_flags = new_flags;
3732 }
3733
3734 /* Compatible flags are ok. */
3735 else if (new_flags == old_flags)
3736 ;
3737
3738 /* Incompatible flags. */
3739 else
3740 {
3741 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3742 to be linked with either. */
3743 error = FALSE;
3744 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3745 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3746 {
3747 error = TRUE;
3748 (*_bfd_error_handler)
3749 (_("%B: compiled with -mrelocatable and linked with "
3750 "modules compiled normally"), ibfd);
3751 }
3752 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3753 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3754 {
3755 error = TRUE;
3756 (*_bfd_error_handler)
3757 (_("%B: compiled normally and linked with "
3758 "modules compiled with -mrelocatable"), ibfd);
3759 }
3760
3761 /* The output is -mrelocatable-lib iff both the input files are. */
3762 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3763 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3764
3765 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3766 but each input file is either -mrelocatable or -mrelocatable-lib. */
3767 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3768 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3769 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3770 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3771
3772 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3773 any module uses it. */
3774 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3775
3776 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3777 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3778
3779 /* Warn about any other mismatches. */
3780 if (new_flags != old_flags)
3781 {
3782 error = TRUE;
3783 (*_bfd_error_handler)
3784 (_("%B: uses different e_flags (0x%lx) fields "
3785 "than previous modules (0x%lx)"),
3786 ibfd, (long) new_flags, (long) old_flags);
3787 }
3788
3789 if (error)
3790 {
3791 bfd_set_error (bfd_error_bad_value);
3792 return FALSE;
3793 }
3794 }
3795
3796 return TRUE;
3797 }
3798 \f
3799 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3800 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3801 int
3802 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3803 struct bfd_link_info *info,
3804 enum ppc_elf_plt_type plt_style,
3805 int emit_stub_syms)
3806 {
3807 struct ppc_elf_link_hash_table *htab;
3808 flagword flags;
3809
3810 htab = ppc_elf_hash_table (info);
3811
3812 if (htab->plt_type == PLT_UNSET)
3813 {
3814 if (plt_style == PLT_OLD)
3815 htab->plt_type = PLT_OLD;
3816 else
3817 {
3818 bfd *ibfd;
3819 enum ppc_elf_plt_type plt_type = plt_style;
3820
3821 /* Look through the reloc flags left by ppc_elf_check_relocs.
3822 Use the old style bss plt if a file makes plt calls
3823 without using the new relocs, and if ld isn't given
3824 --secure-plt and we never see REL16 relocs. */
3825 if (plt_type == PLT_UNSET)
3826 plt_type = PLT_OLD;
3827 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
3828 if (is_ppc_elf_target (ibfd->xvec))
3829 {
3830 if (ppc_elf_tdata (ibfd)->has_rel16)
3831 plt_type = PLT_NEW;
3832 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
3833 {
3834 plt_type = PLT_OLD;
3835 htab->old_bfd = ibfd;
3836 break;
3837 }
3838 }
3839 htab->plt_type = plt_type;
3840 }
3841 }
3842 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
3843 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
3844
3845 htab->emit_stub_syms = emit_stub_syms;
3846
3847 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
3848
3849 if (htab->plt_type == PLT_NEW)
3850 {
3851 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3852 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3853
3854 /* The new PLT is a loaded section. */
3855 if (htab->plt != NULL
3856 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3857 return -1;
3858
3859 /* The new GOT is not executable. */
3860 if (htab->got != NULL
3861 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3862 return -1;
3863 }
3864 else
3865 {
3866 /* Stop an unused .glink section from affecting .text alignment. */
3867 if (htab->glink != NULL
3868 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3869 return -1;
3870 }
3871 return htab->plt_type == PLT_NEW;
3872 }
3873 \f
3874 /* Return the section that should be marked against GC for a given
3875 relocation. */
3876
3877 static asection *
3878 ppc_elf_gc_mark_hook (asection *sec,
3879 struct bfd_link_info *info,
3880 Elf_Internal_Rela *rel,
3881 struct elf_link_hash_entry *h,
3882 Elf_Internal_Sym *sym)
3883 {
3884 if (h != NULL)
3885 switch (ELF32_R_TYPE (rel->r_info))
3886 {
3887 case R_PPC_GNU_VTINHERIT:
3888 case R_PPC_GNU_VTENTRY:
3889 return NULL;
3890 }
3891
3892 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3893 }
3894
3895 /* Update the got, plt and dynamic reloc reference counts for the
3896 section being removed. */
3897
3898 static bfd_boolean
3899 ppc_elf_gc_sweep_hook (bfd *abfd,
3900 struct bfd_link_info *info,
3901 asection *sec,
3902 const Elf_Internal_Rela *relocs)
3903 {
3904 struct ppc_elf_link_hash_table *htab;
3905 Elf_Internal_Shdr *symtab_hdr;
3906 struct elf_link_hash_entry **sym_hashes;
3907 bfd_signed_vma *local_got_refcounts;
3908 const Elf_Internal_Rela *rel, *relend;
3909 asection *got2;
3910
3911 if (info->relocatable)
3912 return TRUE;
3913
3914 if ((sec->flags & SEC_ALLOC) == 0)
3915 return TRUE;
3916
3917 elf_section_data (sec)->local_dynrel = NULL;
3918
3919 htab = ppc_elf_hash_table (info);
3920 symtab_hdr = &elf_symtab_hdr (abfd);
3921 sym_hashes = elf_sym_hashes (abfd);
3922 local_got_refcounts = elf_local_got_refcounts (abfd);
3923 got2 = bfd_get_section_by_name (abfd, ".got2");
3924
3925 relend = relocs + sec->reloc_count;
3926 for (rel = relocs; rel < relend; rel++)
3927 {
3928 unsigned long r_symndx;
3929 enum elf_ppc_reloc_type r_type;
3930 struct elf_link_hash_entry *h = NULL;
3931
3932 r_symndx = ELF32_R_SYM (rel->r_info);
3933 if (r_symndx >= symtab_hdr->sh_info)
3934 {
3935 struct ppc_elf_dyn_relocs **pp, *p;
3936 struct ppc_elf_link_hash_entry *eh;
3937
3938 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3939 while (h->root.type == bfd_link_hash_indirect
3940 || h->root.type == bfd_link_hash_warning)
3941 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3942 eh = (struct ppc_elf_link_hash_entry *) h;
3943
3944 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3945 if (p->sec == sec)
3946 {
3947 /* Everything must go for SEC. */
3948 *pp = p->next;
3949 break;
3950 }
3951 }
3952
3953 r_type = ELF32_R_TYPE (rel->r_info);
3954 switch (r_type)
3955 {
3956 case R_PPC_GOT_TLSLD16:
3957 case R_PPC_GOT_TLSLD16_LO:
3958 case R_PPC_GOT_TLSLD16_HI:
3959 case R_PPC_GOT_TLSLD16_HA:
3960 case R_PPC_GOT_TLSGD16:
3961 case R_PPC_GOT_TLSGD16_LO:
3962 case R_PPC_GOT_TLSGD16_HI:
3963 case R_PPC_GOT_TLSGD16_HA:
3964 case R_PPC_GOT_TPREL16:
3965 case R_PPC_GOT_TPREL16_LO:
3966 case R_PPC_GOT_TPREL16_HI:
3967 case R_PPC_GOT_TPREL16_HA:
3968 case R_PPC_GOT_DTPREL16:
3969 case R_PPC_GOT_DTPREL16_LO:
3970 case R_PPC_GOT_DTPREL16_HI:
3971 case R_PPC_GOT_DTPREL16_HA:
3972 case R_PPC_GOT16:
3973 case R_PPC_GOT16_LO:
3974 case R_PPC_GOT16_HI:
3975 case R_PPC_GOT16_HA:
3976 if (h != NULL)
3977 {
3978 if (h->got.refcount > 0)
3979 h->got.refcount--;
3980 }
3981 else if (local_got_refcounts != NULL)
3982 {
3983 if (local_got_refcounts[r_symndx] > 0)
3984 local_got_refcounts[r_symndx]--;
3985 }
3986 break;
3987
3988 case R_PPC_REL24:
3989 case R_PPC_REL14:
3990 case R_PPC_REL14_BRTAKEN:
3991 case R_PPC_REL14_BRNTAKEN:
3992 case R_PPC_REL32:
3993 if (h == NULL || h == htab->elf.hgot)
3994 break;
3995 /* Fall thru */
3996
3997 case R_PPC_ADDR32:
3998 case R_PPC_ADDR24:
3999 case R_PPC_ADDR16:
4000 case R_PPC_ADDR16_LO:
4001 case R_PPC_ADDR16_HI:
4002 case R_PPC_ADDR16_HA:
4003 case R_PPC_ADDR14:
4004 case R_PPC_ADDR14_BRTAKEN:
4005 case R_PPC_ADDR14_BRNTAKEN:
4006 case R_PPC_UADDR32:
4007 case R_PPC_UADDR16:
4008 if (info->shared)
4009 break;
4010
4011 case R_PPC_PLT32:
4012 case R_PPC_PLTREL24:
4013 case R_PPC_PLTREL32:
4014 case R_PPC_PLT16_LO:
4015 case R_PPC_PLT16_HI:
4016 case R_PPC_PLT16_HA:
4017 if (h != NULL)
4018 {
4019 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4020 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4021 if (ent->plt.refcount > 0)
4022 ent->plt.refcount -= 1;
4023 }
4024 break;
4025
4026 default:
4027 break;
4028 }
4029 }
4030 return TRUE;
4031 }
4032 \f
4033 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4034
4035 asection *
4036 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4037 {
4038 struct ppc_elf_link_hash_table *htab;
4039
4040 htab = ppc_elf_hash_table (info);
4041 if (htab->plt_type == PLT_NEW
4042 && htab->plt != NULL
4043 && htab->plt->output_section != NULL)
4044 {
4045 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4046 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4047 }
4048
4049 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4050 FALSE, FALSE, TRUE);
4051 return _bfd_elf_tls_setup (obfd, info);
4052 }
4053
4054 /* Run through all the TLS relocs looking for optimization
4055 opportunities. */
4056
4057 bfd_boolean
4058 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4059 struct bfd_link_info *info)
4060 {
4061 bfd *ibfd;
4062 asection *sec;
4063 struct ppc_elf_link_hash_table *htab;
4064 int pass;
4065
4066 if (info->relocatable || info->shared)
4067 return TRUE;
4068
4069 htab = ppc_elf_hash_table (info);
4070 /* Make two passes through the relocs. First time check that tls
4071 relocs involved in setting up a tls_get_addr call are indeed
4072 followed by such a call. If they are not, exclude them from
4073 the optimizations done on the second pass. */
4074 for (pass = 0; pass < 2; ++pass)
4075 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4076 {
4077 Elf_Internal_Sym *locsyms = NULL;
4078 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4079
4080 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4081 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4082 {
4083 Elf_Internal_Rela *relstart, *rel, *relend;
4084
4085 /* Read the relocations. */
4086 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4087 info->keep_memory);
4088 if (relstart == NULL)
4089 return FALSE;
4090
4091 relend = relstart + sec->reloc_count;
4092 for (rel = relstart; rel < relend; rel++)
4093 {
4094 enum elf_ppc_reloc_type r_type;
4095 unsigned long r_symndx;
4096 struct elf_link_hash_entry *h = NULL;
4097 char *tls_mask;
4098 char tls_set, tls_clear;
4099 bfd_boolean is_local;
4100 int expecting_tls_get_addr;
4101 bfd_signed_vma *got_count;
4102
4103 r_symndx = ELF32_R_SYM (rel->r_info);
4104 if (r_symndx >= symtab_hdr->sh_info)
4105 {
4106 struct elf_link_hash_entry **sym_hashes;
4107
4108 sym_hashes = elf_sym_hashes (ibfd);
4109 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4110 while (h->root.type == bfd_link_hash_indirect
4111 || h->root.type == bfd_link_hash_warning)
4112 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4113 }
4114
4115 expecting_tls_get_addr = 0;
4116 is_local = FALSE;
4117 if (h == NULL
4118 || !h->def_dynamic)
4119 is_local = TRUE;
4120
4121 r_type = ELF32_R_TYPE (rel->r_info);
4122 switch (r_type)
4123 {
4124 case R_PPC_GOT_TLSLD16:
4125 case R_PPC_GOT_TLSLD16_LO:
4126 expecting_tls_get_addr = 1;
4127 /* Fall thru */
4128
4129 case R_PPC_GOT_TLSLD16_HI:
4130 case R_PPC_GOT_TLSLD16_HA:
4131 /* These relocs should never be against a symbol
4132 defined in a shared lib. Leave them alone if
4133 that turns out to be the case. */
4134 if (!is_local)
4135 continue;
4136
4137 /* LD -> LE */
4138 tls_set = 0;
4139 tls_clear = TLS_LD;
4140 break;
4141
4142 case R_PPC_GOT_TLSGD16:
4143 case R_PPC_GOT_TLSGD16_LO:
4144 expecting_tls_get_addr = 1;
4145 /* Fall thru */
4146
4147 case R_PPC_GOT_TLSGD16_HI:
4148 case R_PPC_GOT_TLSGD16_HA:
4149 if (is_local)
4150 /* GD -> LE */
4151 tls_set = 0;
4152 else
4153 /* GD -> IE */
4154 tls_set = TLS_TLS | TLS_TPRELGD;
4155 tls_clear = TLS_GD;
4156 break;
4157
4158 case R_PPC_GOT_TPREL16:
4159 case R_PPC_GOT_TPREL16_LO:
4160 case R_PPC_GOT_TPREL16_HI:
4161 case R_PPC_GOT_TPREL16_HA:
4162 if (is_local)
4163 {
4164 /* IE -> LE */
4165 tls_set = 0;
4166 tls_clear = TLS_TPREL;
4167 break;
4168 }
4169 else
4170 continue;
4171
4172 default:
4173 continue;
4174 }
4175
4176 if (pass == 0)
4177 {
4178 if (!expecting_tls_get_addr)
4179 continue;
4180
4181 if (rel + 1 < relend)
4182 {
4183 enum elf_ppc_reloc_type r_type2;
4184 unsigned long r_symndx2;
4185 struct elf_link_hash_entry *h2;
4186
4187 /* The next instruction should be a call to
4188 __tls_get_addr. Peek at the reloc to be sure. */
4189 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4190 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4191 if (r_symndx2 >= symtab_hdr->sh_info
4192 && (r_type2 == R_PPC_REL14
4193 || r_type2 == R_PPC_REL14_BRTAKEN
4194 || r_type2 == R_PPC_REL14_BRNTAKEN
4195 || r_type2 == R_PPC_REL24
4196 || r_type2 == R_PPC_PLTREL24))
4197 {
4198 struct elf_link_hash_entry **sym_hashes;
4199
4200 sym_hashes = elf_sym_hashes (ibfd);
4201 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4202 while (h2->root.type == bfd_link_hash_indirect
4203 || h2->root.type == bfd_link_hash_warning)
4204 h2 = ((struct elf_link_hash_entry *)
4205 h2->root.u.i.link);
4206 if (h2 == htab->tls_get_addr)
4207 continue;
4208 }
4209 }
4210
4211 /* Uh oh, we didn't find the expected call. We
4212 could just mark this symbol to exclude it
4213 from tls optimization but it's safer to skip
4214 the entire section. */
4215 sec->has_tls_reloc = 0;
4216 break;
4217 }
4218
4219 if (h != NULL)
4220 {
4221 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4222 got_count = &h->got.refcount;
4223 }
4224 else
4225 {
4226 Elf_Internal_Sym *sym;
4227 bfd_signed_vma *lgot_refs;
4228 char *lgot_masks;
4229
4230 if (locsyms == NULL)
4231 {
4232 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4233 if (locsyms == NULL)
4234 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4235 symtab_hdr->sh_info,
4236 0, NULL, NULL, NULL);
4237 if (locsyms == NULL)
4238 {
4239 if (elf_section_data (sec)->relocs != relstart)
4240 free (relstart);
4241 return FALSE;
4242 }
4243 }
4244 sym = locsyms + r_symndx;
4245 lgot_refs = elf_local_got_refcounts (ibfd);
4246 if (lgot_refs == NULL)
4247 abort ();
4248 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4249 tls_mask = &lgot_masks[r_symndx];
4250 got_count = &lgot_refs[r_symndx];
4251 }
4252
4253 if (tls_set == 0)
4254 {
4255 /* We managed to get rid of a got entry. */
4256 if (*got_count > 0)
4257 *got_count -= 1;
4258 }
4259
4260 if (expecting_tls_get_addr)
4261 {
4262 struct plt_entry *ent;
4263
4264 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4265 if (ent != NULL && ent->plt.refcount > 0)
4266 ent->plt.refcount -= 1;
4267 }
4268
4269 *tls_mask |= tls_set;
4270 *tls_mask &= ~tls_clear;
4271 }
4272
4273 if (elf_section_data (sec)->relocs != relstart)
4274 free (relstart);
4275 }
4276
4277 if (locsyms != NULL
4278 && (symtab_hdr->contents != (unsigned char *) locsyms))
4279 {
4280 if (!info->keep_memory)
4281 free (locsyms);
4282 else
4283 symtab_hdr->contents = (unsigned char *) locsyms;
4284 }
4285 }
4286 return TRUE;
4287 }
4288 \f
4289 /* Adjust a symbol defined by a dynamic object and referenced by a
4290 regular object. The current definition is in some section of the
4291 dynamic object, but we're not including those sections. We have to
4292 change the definition to something the rest of the link can
4293 understand. */
4294
4295 static bfd_boolean
4296 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4297 struct elf_link_hash_entry *h)
4298 {
4299 struct ppc_elf_link_hash_table *htab;
4300 asection *s;
4301
4302 #ifdef DEBUG
4303 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4304 h->root.root.string);
4305 #endif
4306
4307 /* Make sure we know what is going on here. */
4308 htab = ppc_elf_hash_table (info);
4309 BFD_ASSERT (htab->elf.dynobj != NULL
4310 && (h->needs_plt
4311 || h->u.weakdef != NULL
4312 || (h->def_dynamic
4313 && h->ref_regular
4314 && !h->def_regular)));
4315
4316 /* Deal with function syms. */
4317 if (h->type == STT_FUNC
4318 || h->needs_plt)
4319 {
4320 /* Clear procedure linkage table information for any symbol that
4321 won't need a .plt entry. */
4322 struct plt_entry *ent;
4323 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4324 if (ent->plt.refcount > 0)
4325 break;
4326 if (ent == NULL
4327 || SYMBOL_CALLS_LOCAL (info, h)
4328 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4329 && h->root.type == bfd_link_hash_undefweak))
4330 {
4331 /* A PLT entry is not required/allowed when:
4332
4333 1. We are not using ld.so; because then the PLT entry
4334 can't be set up, so we can't use one. In this case,
4335 ppc_elf_adjust_dynamic_symbol won't even be called.
4336
4337 2. GC has rendered the entry unused.
4338
4339 3. We know for certain that a call to this symbol
4340 will go to this object, or will remain undefined. */
4341 h->plt.plist = NULL;
4342 h->needs_plt = 0;
4343 }
4344 return TRUE;
4345 }
4346 else
4347 h->plt.plist = NULL;
4348
4349 /* If this is a weak symbol, and there is a real definition, the
4350 processor independent code will have arranged for us to see the
4351 real definition first, and we can just use the same value. */
4352 if (h->u.weakdef != NULL)
4353 {
4354 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4355 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4356 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4357 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4358 if (ELIMINATE_COPY_RELOCS)
4359 h->non_got_ref = h->u.weakdef->non_got_ref;
4360 return TRUE;
4361 }
4362
4363 /* This is a reference to a symbol defined by a dynamic object which
4364 is not a function. */
4365
4366 /* If we are creating a shared library, we must presume that the
4367 only references to the symbol are via the global offset table.
4368 For such cases we need not do anything here; the relocations will
4369 be handled correctly by relocate_section. */
4370 if (info->shared)
4371 return TRUE;
4372
4373 /* If there are no references to this symbol that do not use the
4374 GOT, we don't need to generate a copy reloc. */
4375 if (!h->non_got_ref)
4376 return TRUE;
4377
4378 /* If we didn't find any dynamic relocs in read-only sections, then
4379 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4380 We can't do this if there are any small data relocations. This
4381 doesn't work on VxWorks, where we can not have dynamic
4382 relocations (other than copy and jump slot relocations) in an
4383 executable. */
4384 if (ELIMINATE_COPY_RELOCS
4385 && !ppc_elf_hash_entry (h)->has_sda_refs
4386 && !htab->is_vxworks)
4387 {
4388 struct ppc_elf_dyn_relocs *p;
4389 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4390 {
4391 s = p->sec->output_section;
4392 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4393 break;
4394 }
4395
4396 if (p == NULL)
4397 {
4398 h->non_got_ref = 0;
4399 return TRUE;
4400 }
4401 }
4402
4403 if (h->size == 0)
4404 {
4405 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4406 h->root.root.string);
4407 return TRUE;
4408 }
4409
4410 /* We must allocate the symbol in our .dynbss section, which will
4411 become part of the .bss section of the executable. There will be
4412 an entry for this symbol in the .dynsym section. The dynamic
4413 object will contain position independent code, so all references
4414 from the dynamic object to this symbol will go through the global
4415 offset table. The dynamic linker will use the .dynsym entry to
4416 determine the address it must put in the global offset table, so
4417 both the dynamic object and the regular object will refer to the
4418 same memory location for the variable.
4419
4420 Of course, if the symbol is referenced using SDAREL relocs, we
4421 must instead allocate it in .sbss. */
4422
4423 if (ppc_elf_hash_entry (h)->has_sda_refs)
4424 s = htab->dynsbss;
4425 else
4426 s = htab->dynbss;
4427 BFD_ASSERT (s != NULL);
4428
4429 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4430 copy the initial value out of the dynamic object and into the
4431 runtime process image. We need to remember the offset into the
4432 .rela.bss section we are going to use. */
4433 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4434 {
4435 asection *srel;
4436
4437 if (ppc_elf_hash_entry (h)->has_sda_refs)
4438 srel = htab->relsbss;
4439 else
4440 srel = htab->relbss;
4441 BFD_ASSERT (srel != NULL);
4442 srel->size += sizeof (Elf32_External_Rela);
4443 h->needs_copy = 1;
4444 }
4445
4446 return _bfd_elf_adjust_dynamic_copy (h, s);
4447 }
4448 \f
4449 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4450 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4451 specifying the addend on the plt relocation. For -fpic code, the sym
4452 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4453 xxxxxxxx.got2.plt_pic32.<callee>. */
4454
4455 static bfd_boolean
4456 add_stub_sym (struct plt_entry *ent,
4457 struct elf_link_hash_entry *h,
4458 struct bfd_link_info *info)
4459 {
4460 struct elf_link_hash_entry *sh;
4461 size_t len1, len2, len3;
4462 char *name;
4463 const char *stub;
4464 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4465
4466 if (info->shared || info->pie)
4467 stub = ".plt_pic32.";
4468 else
4469 stub = ".plt_call32.";
4470
4471 len1 = strlen (h->root.root.string);
4472 len2 = strlen (stub);
4473 len3 = 0;
4474 if (ent->sec)
4475 len3 = strlen (ent->sec->name);
4476 name = bfd_malloc (len1 + len2 + len3 + 9);
4477 if (name == NULL)
4478 return FALSE;
4479 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4480 if (ent->sec)
4481 memcpy (name + 8, ent->sec->name, len3);
4482 memcpy (name + 8 + len3, stub, len2);
4483 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4484 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4485 if (sh == NULL)
4486 return FALSE;
4487 if (sh->root.type == bfd_link_hash_new)
4488 {
4489 sh->root.type = bfd_link_hash_defined;
4490 sh->root.u.def.section = htab->glink;
4491 sh->root.u.def.value = ent->glink_offset;
4492 sh->ref_regular = 1;
4493 sh->def_regular = 1;
4494 sh->ref_regular_nonweak = 1;
4495 sh->forced_local = 1;
4496 sh->non_elf = 0;
4497 }
4498 return TRUE;
4499 }
4500
4501 /* Allocate NEED contiguous space in .got, and return the offset.
4502 Handles allocation of the got header when crossing 32k. */
4503
4504 static bfd_vma
4505 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4506 {
4507 bfd_vma where;
4508 unsigned int max_before_header;
4509
4510 if (htab->plt_type == PLT_VXWORKS)
4511 {
4512 where = htab->got->size;
4513 htab->got->size += need;
4514 }
4515 else
4516 {
4517 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4518 if (need <= htab->got_gap)
4519 {
4520 where = max_before_header - htab->got_gap;
4521 htab->got_gap -= need;
4522 }
4523 else
4524 {
4525 if (htab->got->size + need > max_before_header
4526 && htab->got->size <= max_before_header)
4527 {
4528 htab->got_gap = max_before_header - htab->got->size;
4529 htab->got->size = max_before_header + htab->got_header_size;
4530 }
4531 where = htab->got->size;
4532 htab->got->size += need;
4533 }
4534 }
4535 return where;
4536 }
4537
4538 /* Allocate space in associated reloc sections for dynamic relocs. */
4539
4540 static bfd_boolean
4541 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4542 {
4543 struct bfd_link_info *info = inf;
4544 struct ppc_elf_link_hash_entry *eh;
4545 struct ppc_elf_link_hash_table *htab;
4546 struct ppc_elf_dyn_relocs *p;
4547
4548 if (h->root.type == bfd_link_hash_indirect)
4549 return TRUE;
4550
4551 if (h->root.type == bfd_link_hash_warning)
4552 /* When warning symbols are created, they **replace** the "real"
4553 entry in the hash table, thus we never get to see the real
4554 symbol in a hash traversal. So look at it now. */
4555 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4556
4557 htab = ppc_elf_hash_table (info);
4558 if (htab->elf.dynamic_sections_created)
4559 {
4560 struct plt_entry *ent;
4561 bfd_boolean doneone = FALSE;
4562 bfd_vma plt_offset = 0, glink_offset = 0;
4563
4564 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4565 if (ent->plt.refcount > 0)
4566 {
4567 /* Make sure this symbol is output as a dynamic symbol. */
4568 if (h->dynindx == -1
4569 && !h->forced_local)
4570 {
4571 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4572 return FALSE;
4573 }
4574
4575 if (info->shared
4576 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4577 {
4578 asection *s = htab->plt;
4579
4580 if (htab->plt_type == PLT_NEW)
4581 {
4582 if (!doneone)
4583 {
4584 plt_offset = s->size;
4585 s->size += 4;
4586 }
4587 ent->plt.offset = plt_offset;
4588
4589 s = htab->glink;
4590 if (!doneone || info->shared || info->pie)
4591 {
4592 glink_offset = s->size;
4593 s->size += GLINK_ENTRY_SIZE;
4594 }
4595 if (!doneone
4596 && !info->shared
4597 && !h->def_regular)
4598 {
4599 h->root.u.def.section = s;
4600 h->root.u.def.value = glink_offset;
4601 }
4602 ent->glink_offset = glink_offset;
4603
4604 if (htab->emit_stub_syms
4605 && !add_stub_sym (ent, h, info))
4606 return FALSE;
4607 }
4608 else
4609 {
4610 if (!doneone)
4611 {
4612 /* If this is the first .plt entry, make room
4613 for the special first entry. */
4614 if (s->size == 0)
4615 s->size += htab->plt_initial_entry_size;
4616
4617 /* The PowerPC PLT is actually composed of two
4618 parts, the first part is 2 words (for a load
4619 and a jump), and then there is a remaining
4620 word available at the end. */
4621 plt_offset = (htab->plt_initial_entry_size
4622 + (htab->plt_slot_size
4623 * ((s->size
4624 - htab->plt_initial_entry_size)
4625 / htab->plt_entry_size)));
4626
4627 /* If this symbol is not defined in a regular
4628 file, and we are not generating a shared
4629 library, then set the symbol to this location
4630 in the .plt. This is required to make
4631 function pointers compare as equal between
4632 the normal executable and the shared library. */
4633 if (! info->shared
4634 && !h->def_regular)
4635 {
4636 h->root.u.def.section = s;
4637 h->root.u.def.value = plt_offset;
4638 }
4639
4640 /* Make room for this entry. */
4641 s->size += htab->plt_entry_size;
4642 /* After the 8192nd entry, room for two entries
4643 is allocated. */
4644 if (htab->plt_type == PLT_OLD
4645 && (s->size - htab->plt_initial_entry_size)
4646 / htab->plt_entry_size
4647 > PLT_NUM_SINGLE_ENTRIES)
4648 s->size += htab->plt_entry_size;
4649 }
4650 ent->plt.offset = plt_offset;
4651 }
4652
4653 /* We also need to make an entry in the .rela.plt section. */
4654 if (!doneone)
4655 {
4656 htab->relplt->size += sizeof (Elf32_External_Rela);
4657
4658 if (htab->plt_type == PLT_VXWORKS)
4659 {
4660 /* Allocate space for the unloaded relocations. */
4661 if (!info->shared)
4662 {
4663 if (ent->plt.offset
4664 == (bfd_vma) htab->plt_initial_entry_size)
4665 {
4666 htab->srelplt2->size
4667 += sizeof (Elf32_External_Rela)
4668 * VXWORKS_PLTRESOLVE_RELOCS;
4669 }
4670
4671 htab->srelplt2->size
4672 += sizeof (Elf32_External_Rela)
4673 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4674 }
4675
4676 /* Every PLT entry has an associated GOT entry in
4677 .got.plt. */
4678 htab->sgotplt->size += 4;
4679 }
4680 doneone = TRUE;
4681 }
4682 }
4683 else
4684 ent->plt.offset = (bfd_vma) -1;
4685 }
4686 else
4687 ent->plt.offset = (bfd_vma) -1;
4688
4689 if (!doneone)
4690 {
4691 h->plt.plist = NULL;
4692 h->needs_plt = 0;
4693 }
4694 }
4695 else
4696 {
4697 h->plt.plist = NULL;
4698 h->needs_plt = 0;
4699 }
4700
4701 eh = (struct ppc_elf_link_hash_entry *) h;
4702 if (eh->elf.got.refcount > 0)
4703 {
4704 /* Make sure this symbol is output as a dynamic symbol. */
4705 if (eh->elf.dynindx == -1
4706 && !eh->elf.forced_local)
4707 {
4708 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4709 return FALSE;
4710 }
4711
4712 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4713 && !eh->elf.def_dynamic)
4714 {
4715 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4716 htab->tlsld_got.refcount += 1;
4717 eh->elf.got.offset = (bfd_vma) -1;
4718 }
4719 else
4720 {
4721 bfd_boolean dyn;
4722 unsigned int need = 0;
4723 if ((eh->tls_mask & TLS_TLS) != 0)
4724 {
4725 if ((eh->tls_mask & TLS_LD) != 0)
4726 need += 8;
4727 if ((eh->tls_mask & TLS_GD) != 0)
4728 need += 8;
4729 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4730 need += 4;
4731 if ((eh->tls_mask & TLS_DTPREL) != 0)
4732 need += 4;
4733 }
4734 else
4735 need += 4;
4736 eh->elf.got.offset = allocate_got (htab, need);
4737 dyn = htab->elf.dynamic_sections_created;
4738 if ((info->shared
4739 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4740 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4741 || eh->elf.root.type != bfd_link_hash_undefweak))
4742 {
4743 /* All the entries we allocated need relocs.
4744 Except LD only needs one. */
4745 if ((eh->tls_mask & TLS_LD) != 0)
4746 need -= 4;
4747 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4748 }
4749 }
4750 }
4751 else
4752 eh->elf.got.offset = (bfd_vma) -1;
4753
4754 if (eh->dyn_relocs == NULL)
4755 return TRUE;
4756
4757 /* In the shared -Bsymbolic case, discard space allocated for
4758 dynamic pc-relative relocs against symbols which turn out to be
4759 defined in regular objects. For the normal shared case, discard
4760 space for relocs that have become local due to symbol visibility
4761 changes. */
4762
4763 if (info->shared)
4764 {
4765 /* Relocs that use pc_count are those that appear on a call insn,
4766 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4767 generated via assembly. We want calls to protected symbols to
4768 resolve directly to the function rather than going via the plt.
4769 If people want function pointer comparisons to work as expected
4770 then they should avoid writing weird assembly. */
4771 if (SYMBOL_CALLS_LOCAL (info, h))
4772 {
4773 struct ppc_elf_dyn_relocs **pp;
4774
4775 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4776 {
4777 p->count -= p->pc_count;
4778 p->pc_count = 0;
4779 if (p->count == 0)
4780 *pp = p->next;
4781 else
4782 pp = &p->next;
4783 }
4784 }
4785
4786 /* Also discard relocs on undefined weak syms with non-default
4787 visibility. */
4788 if (eh->dyn_relocs != NULL
4789 && h->root.type == bfd_link_hash_undefweak)
4790 {
4791 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4792 eh->dyn_relocs = NULL;
4793
4794 /* Make sure undefined weak symbols are output as a dynamic
4795 symbol in PIEs. */
4796 else if (h->dynindx == -1
4797 && !h->forced_local)
4798 {
4799 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4800 return FALSE;
4801 }
4802 }
4803 }
4804 else if (ELIMINATE_COPY_RELOCS)
4805 {
4806 /* For the non-shared case, discard space for relocs against
4807 symbols which turn out to need copy relocs or are not
4808 dynamic. */
4809
4810 if (!h->non_got_ref
4811 && h->def_dynamic
4812 && !h->def_regular)
4813 {
4814 /* Make sure this symbol is output as a dynamic symbol.
4815 Undefined weak syms won't yet be marked as dynamic. */
4816 if (h->dynindx == -1
4817 && !h->forced_local)
4818 {
4819 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4820 return FALSE;
4821 }
4822
4823 /* If that succeeded, we know we'll be keeping all the
4824 relocs. */
4825 if (h->dynindx != -1)
4826 goto keep;
4827 }
4828
4829 eh->dyn_relocs = NULL;
4830
4831 keep: ;
4832 }
4833
4834 /* Finally, allocate space. */
4835 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4836 {
4837 asection *sreloc = elf_section_data (p->sec)->sreloc;
4838 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4839 }
4840
4841 return TRUE;
4842 }
4843
4844 /* Find any dynamic relocs that apply to read-only sections. */
4845
4846 static bfd_boolean
4847 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4848 {
4849 struct ppc_elf_dyn_relocs *p;
4850
4851 if (h->root.type == bfd_link_hash_indirect)
4852 return TRUE;
4853
4854 if (h->root.type == bfd_link_hash_warning)
4855 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4856
4857 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4858 {
4859 asection *s = p->sec->output_section;
4860
4861 if (s != NULL
4862 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4863 == (SEC_READONLY | SEC_ALLOC)))
4864 {
4865 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4866
4867 /* Not an error, just cut short the traversal. */
4868 return FALSE;
4869 }
4870 }
4871 return TRUE;
4872 }
4873
4874 /* Set the sizes of the dynamic sections. */
4875
4876 static bfd_boolean
4877 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4878 struct bfd_link_info *info)
4879 {
4880 struct ppc_elf_link_hash_table *htab;
4881 asection *s;
4882 bfd_boolean relocs;
4883 bfd *ibfd;
4884
4885 #ifdef DEBUG
4886 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4887 #endif
4888
4889 htab = ppc_elf_hash_table (info);
4890 BFD_ASSERT (htab->elf.dynobj != NULL);
4891
4892 if (elf_hash_table (info)->dynamic_sections_created)
4893 {
4894 /* Set the contents of the .interp section to the interpreter. */
4895 if (info->executable)
4896 {
4897 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4898 BFD_ASSERT (s != NULL);
4899 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4900 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4901 }
4902 }
4903
4904 if (htab->plt_type == PLT_OLD)
4905 htab->got_header_size = 16;
4906 else if (htab->plt_type == PLT_NEW)
4907 htab->got_header_size = 12;
4908
4909 /* Set up .got offsets for local syms, and space for local dynamic
4910 relocs. */
4911 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4912 {
4913 bfd_signed_vma *local_got;
4914 bfd_signed_vma *end_local_got;
4915 char *lgot_masks;
4916 bfd_size_type locsymcount;
4917 Elf_Internal_Shdr *symtab_hdr;
4918
4919 if (!is_ppc_elf_target (ibfd->xvec))
4920 continue;
4921
4922 for (s = ibfd->sections; s != NULL; s = s->next)
4923 {
4924 struct ppc_elf_dyn_relocs *p;
4925
4926 for (p = ((struct ppc_elf_dyn_relocs *)
4927 elf_section_data (s)->local_dynrel);
4928 p != NULL;
4929 p = p->next)
4930 {
4931 if (!bfd_is_abs_section (p->sec)
4932 && bfd_is_abs_section (p->sec->output_section))
4933 {
4934 /* Input section has been discarded, either because
4935 it is a copy of a linkonce section or due to
4936 linker script /DISCARD/, so we'll be discarding
4937 the relocs too. */
4938 }
4939 else if (p->count != 0)
4940 {
4941 elf_section_data (p->sec)->sreloc->size
4942 += p->count * sizeof (Elf32_External_Rela);
4943 if ((p->sec->output_section->flags
4944 & (SEC_READONLY | SEC_ALLOC))
4945 == (SEC_READONLY | SEC_ALLOC))
4946 info->flags |= DF_TEXTREL;
4947 }
4948 }
4949 }
4950
4951 local_got = elf_local_got_refcounts (ibfd);
4952 if (!local_got)
4953 continue;
4954
4955 symtab_hdr = &elf_symtab_hdr (ibfd);
4956 locsymcount = symtab_hdr->sh_info;
4957 end_local_got = local_got + locsymcount;
4958 lgot_masks = (char *) end_local_got;
4959 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4960 if (*local_got > 0)
4961 {
4962 if (*lgot_masks == (TLS_TLS | TLS_LD))
4963 {
4964 /* If just an LD reloc, we'll just use
4965 htab->tlsld_got.offset. */
4966 htab->tlsld_got.refcount += 1;
4967 *local_got = (bfd_vma) -1;
4968 }
4969 else
4970 {
4971 unsigned int need = 0;
4972 if ((*lgot_masks & TLS_TLS) != 0)
4973 {
4974 if ((*lgot_masks & TLS_GD) != 0)
4975 need += 8;
4976 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4977 need += 4;
4978 if ((*lgot_masks & TLS_DTPREL) != 0)
4979 need += 4;
4980 }
4981 else
4982 need += 4;
4983 *local_got = allocate_got (htab, need);
4984 if (info->shared)
4985 htab->relgot->size += (need
4986 * (sizeof (Elf32_External_Rela) / 4));
4987 }
4988 }
4989 else
4990 *local_got = (bfd_vma) -1;
4991 }
4992
4993 /* Allocate space for global sym dynamic relocs. */
4994 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4995
4996 if (htab->tlsld_got.refcount > 0)
4997 {
4998 htab->tlsld_got.offset = allocate_got (htab, 8);
4999 if (info->shared)
5000 htab->relgot->size += sizeof (Elf32_External_Rela);
5001 }
5002 else
5003 htab->tlsld_got.offset = (bfd_vma) -1;
5004
5005 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5006 {
5007 unsigned int g_o_t = 32768;
5008
5009 /* If we haven't allocated the header, do so now. When we get here,
5010 for old plt/got the got size will be 0 to 32764 (not allocated),
5011 or 32780 to 65536 (header allocated). For new plt/got, the
5012 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5013 if (htab->got->size <= 32768)
5014 {
5015 g_o_t = htab->got->size;
5016 if (htab->plt_type == PLT_OLD)
5017 g_o_t += 4;
5018 htab->got->size += htab->got_header_size;
5019 }
5020
5021 htab->elf.hgot->root.u.def.value = g_o_t;
5022 }
5023
5024 if (htab->glink != NULL && htab->glink->size != 0)
5025 {
5026 htab->glink_pltresolve = htab->glink->size;
5027 /* Space for the branch table. */
5028 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5029 /* Pad out to align the start of PLTresolve. */
5030 htab->glink->size += -htab->glink->size & 15;
5031 htab->glink->size += GLINK_PLTRESOLVE;
5032
5033 if (htab->emit_stub_syms)
5034 {
5035 struct elf_link_hash_entry *sh;
5036 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5037 TRUE, FALSE, FALSE);
5038 if (sh == NULL)
5039 return FALSE;
5040 if (sh->root.type == bfd_link_hash_new)
5041 {
5042 sh->root.type = bfd_link_hash_defined;
5043 sh->root.u.def.section = htab->glink;
5044 sh->root.u.def.value = htab->glink_pltresolve;
5045 sh->ref_regular = 1;
5046 sh->def_regular = 1;
5047 sh->ref_regular_nonweak = 1;
5048 sh->forced_local = 1;
5049 sh->non_elf = 0;
5050 }
5051 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5052 TRUE, FALSE, FALSE);
5053 if (sh == NULL)
5054 return FALSE;
5055 if (sh->root.type == bfd_link_hash_new)
5056 {
5057 sh->root.type = bfd_link_hash_defined;
5058 sh->root.u.def.section = htab->glink;
5059 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5060 sh->ref_regular = 1;
5061 sh->def_regular = 1;
5062 sh->ref_regular_nonweak = 1;
5063 sh->forced_local = 1;
5064 sh->non_elf = 0;
5065 }
5066 }
5067 }
5068
5069 /* We've now determined the sizes of the various dynamic sections.
5070 Allocate memory for them. */
5071 relocs = FALSE;
5072 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5073 {
5074 bfd_boolean strip_section = TRUE;
5075
5076 if ((s->flags & SEC_LINKER_CREATED) == 0)
5077 continue;
5078
5079 if (s == htab->plt
5080 || s == htab->glink
5081 || s == htab->got
5082 || s == htab->sgotplt
5083 || s == htab->sbss
5084 || s == htab->dynbss
5085 || s == htab->dynsbss)
5086 {
5087 /* We'd like to strip these sections if they aren't needed, but if
5088 we've exported dynamic symbols from them we must leave them.
5089 It's too late to tell BFD to get rid of the symbols. */
5090 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5091 strip_section = FALSE;
5092 /* Strip this section if we don't need it; see the
5093 comment below. */
5094 }
5095 else if (s == htab->sdata[0].section
5096 || s == htab->sdata[1].section)
5097 {
5098 /* Strip these too. */
5099 }
5100 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5101 {
5102 if (s->size != 0)
5103 {
5104 /* Remember whether there are any relocation sections. */
5105 relocs = TRUE;
5106
5107 /* We use the reloc_count field as a counter if we need
5108 to copy relocs into the output file. */
5109 s->reloc_count = 0;
5110 }
5111 }
5112 else
5113 {
5114 /* It's not one of our sections, so don't allocate space. */
5115 continue;
5116 }
5117
5118 if (s->size == 0 && strip_section)
5119 {
5120 /* If we don't need this section, strip it from the
5121 output file. This is mostly to handle .rela.bss and
5122 .rela.plt. We must create both sections in
5123 create_dynamic_sections, because they must be created
5124 before the linker maps input sections to output
5125 sections. The linker does that before
5126 adjust_dynamic_symbol is called, and it is that
5127 function which decides whether anything needs to go
5128 into these sections. */
5129 s->flags |= SEC_EXCLUDE;
5130 continue;
5131 }
5132
5133 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5134 continue;
5135
5136 /* Allocate memory for the section contents. */
5137 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5138 if (s->contents == NULL)
5139 return FALSE;
5140 }
5141
5142 if (htab->elf.dynamic_sections_created)
5143 {
5144 /* Add some entries to the .dynamic section. We fill in the
5145 values later, in ppc_elf_finish_dynamic_sections, but we
5146 must add the entries now so that we get the correct size for
5147 the .dynamic section. The DT_DEBUG entry is filled in by the
5148 dynamic linker and used by the debugger. */
5149 #define add_dynamic_entry(TAG, VAL) \
5150 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5151
5152 if (info->executable)
5153 {
5154 if (!add_dynamic_entry (DT_DEBUG, 0))
5155 return FALSE;
5156 }
5157
5158 if (htab->plt != NULL && htab->plt->size != 0)
5159 {
5160 if (!add_dynamic_entry (DT_PLTGOT, 0)
5161 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5162 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5163 || !add_dynamic_entry (DT_JMPREL, 0))
5164 return FALSE;
5165 }
5166
5167 if (htab->glink != NULL && htab->glink->size != 0)
5168 {
5169 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5170 return FALSE;
5171 }
5172
5173 if (relocs)
5174 {
5175 if (!add_dynamic_entry (DT_RELA, 0)
5176 || !add_dynamic_entry (DT_RELASZ, 0)
5177 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5178 return FALSE;
5179 }
5180
5181 /* If any dynamic relocs apply to a read-only section, then we
5182 need a DT_TEXTREL entry. */
5183 if ((info->flags & DF_TEXTREL) == 0)
5184 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
5185 info);
5186
5187 if ((info->flags & DF_TEXTREL) != 0)
5188 {
5189 if (!add_dynamic_entry (DT_TEXTREL, 0))
5190 return FALSE;
5191 }
5192 if (htab->is_vxworks
5193 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5194 return FALSE;
5195 }
5196 #undef add_dynamic_entry
5197
5198 return TRUE;
5199 }
5200 \f
5201 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5202
5203 static const int shared_stub_entry[] =
5204 {
5205 0x7c0802a6, /* mflr 0 */
5206 0x429f0005, /* bcl 20, 31, .Lxxx */
5207 0x7d6802a6, /* mflr 11 */
5208 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5209 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5210 0x7c0803a6, /* mtlr 0 */
5211 0x7d6903a6, /* mtctr 11 */
5212 0x4e800420, /* bctr */
5213 };
5214
5215 static const int stub_entry[] =
5216 {
5217 0x3d600000, /* lis 11,xxx@ha */
5218 0x396b0000, /* addi 11,11,xxx@l */
5219 0x7d6903a6, /* mtctr 11 */
5220 0x4e800420, /* bctr */
5221 };
5222
5223 static bfd_boolean
5224 ppc_elf_relax_section (bfd *abfd,
5225 asection *isec,
5226 struct bfd_link_info *link_info,
5227 bfd_boolean *again)
5228 {
5229 struct one_fixup
5230 {
5231 struct one_fixup *next;
5232 asection *tsec;
5233 bfd_vma toff;
5234 bfd_vma trampoff;
5235 };
5236
5237 Elf_Internal_Shdr *symtab_hdr;
5238 bfd_byte *contents = NULL;
5239 Elf_Internal_Sym *isymbuf = NULL;
5240 Elf_Internal_Rela *internal_relocs = NULL;
5241 Elf_Internal_Rela *irel, *irelend;
5242 struct one_fixup *fixups = NULL;
5243 bfd_boolean changed;
5244 struct ppc_elf_link_hash_table *htab;
5245 bfd_size_type trampoff;
5246 asection *got2;
5247
5248 *again = FALSE;
5249
5250 /* Nothing to do if there are no relocations, and no need to do
5251 anything with non-alloc sections. */
5252 if ((isec->flags & SEC_ALLOC) == 0
5253 || (isec->flags & SEC_RELOC) == 0
5254 || isec->reloc_count == 0)
5255 return TRUE;
5256
5257 trampoff = (isec->size + 3) & (bfd_vma) -4;
5258 /* Space for a branch around any trampolines. */
5259 trampoff += 4;
5260
5261 symtab_hdr = &elf_symtab_hdr (abfd);
5262
5263 /* Get a copy of the native relocations. */
5264 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5265 link_info->keep_memory);
5266 if (internal_relocs == NULL)
5267 goto error_return;
5268
5269 htab = ppc_elf_hash_table (link_info);
5270 got2 = bfd_get_section_by_name (abfd, ".got2");
5271
5272 irelend = internal_relocs + isec->reloc_count;
5273 for (irel = internal_relocs; irel < irelend; irel++)
5274 {
5275 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5276 bfd_vma symaddr, reladdr, toff, roff;
5277 asection *tsec;
5278 struct one_fixup *f;
5279 size_t insn_offset = 0;
5280 bfd_vma max_branch_offset, val;
5281 bfd_byte *hit_addr;
5282 unsigned long t0;
5283 unsigned char sym_type;
5284
5285 switch (r_type)
5286 {
5287 case R_PPC_REL24:
5288 case R_PPC_LOCAL24PC:
5289 case R_PPC_PLTREL24:
5290 max_branch_offset = 1 << 25;
5291 break;
5292
5293 case R_PPC_REL14:
5294 case R_PPC_REL14_BRTAKEN:
5295 case R_PPC_REL14_BRNTAKEN:
5296 max_branch_offset = 1 << 15;
5297 break;
5298
5299 default:
5300 continue;
5301 }
5302
5303 /* Get the value of the symbol referred to by the reloc. */
5304 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5305 {
5306 /* A local symbol. */
5307 Elf_Internal_Sym *isym;
5308
5309 /* Read this BFD's local symbols. */
5310 if (isymbuf == NULL)
5311 {
5312 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5313 if (isymbuf == NULL)
5314 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5315 symtab_hdr->sh_info, 0,
5316 NULL, NULL, NULL);
5317 if (isymbuf == 0)
5318 goto error_return;
5319 }
5320 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5321 if (isym->st_shndx == SHN_UNDEF)
5322 continue; /* We can't do anything with undefined symbols. */
5323 else if (isym->st_shndx == SHN_ABS)
5324 tsec = bfd_abs_section_ptr;
5325 else if (isym->st_shndx == SHN_COMMON)
5326 tsec = bfd_com_section_ptr;
5327 else
5328 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5329
5330 toff = isym->st_value;
5331 sym_type = ELF_ST_TYPE (isym->st_info);
5332 }
5333 else
5334 {
5335 /* Global symbol handling. */
5336 unsigned long indx;
5337 struct elf_link_hash_entry *h;
5338
5339 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5340 h = elf_sym_hashes (abfd)[indx];
5341
5342 while (h->root.type == bfd_link_hash_indirect
5343 || h->root.type == bfd_link_hash_warning)
5344 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5345
5346 tsec = NULL;
5347 toff = 0;
5348 if (r_type == R_PPC_PLTREL24
5349 && htab->plt != NULL)
5350 {
5351 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5352
5353 if (ent != NULL)
5354 {
5355 if (htab->plt_type == PLT_NEW)
5356 {
5357 tsec = htab->glink;
5358 toff = ent->glink_offset;
5359 }
5360 else
5361 {
5362 tsec = htab->plt;
5363 toff = ent->plt.offset;
5364 }
5365 }
5366 }
5367 if (tsec != NULL)
5368 ;
5369 else if (h->root.type == bfd_link_hash_defined
5370 || h->root.type == bfd_link_hash_defweak)
5371 {
5372 tsec = h->root.u.def.section;
5373 toff = h->root.u.def.value;
5374 }
5375 else
5376 continue;
5377
5378 sym_type = h->type;
5379 }
5380
5381 /* If the branch and target are in the same section, you have
5382 no hope of adding stubs. We'll error out later should the
5383 branch overflow. */
5384 if (tsec == isec)
5385 continue;
5386
5387 /* There probably isn't any reason to handle symbols in
5388 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5389 attribute for a code section, and we are only looking at
5390 branches. However, implement it correctly here as a
5391 reference for other target relax_section functions. */
5392 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5393 {
5394 /* At this stage in linking, no SEC_MERGE symbol has been
5395 adjusted, so all references to such symbols need to be
5396 passed through _bfd_merged_section_offset. (Later, in
5397 relocate_section, all SEC_MERGE symbols *except* for
5398 section symbols have been adjusted.)
5399
5400 gas may reduce relocations against symbols in SEC_MERGE
5401 sections to a relocation against the section symbol when
5402 the original addend was zero. When the reloc is against
5403 a section symbol we should include the addend in the
5404 offset passed to _bfd_merged_section_offset, since the
5405 location of interest is the original symbol. On the
5406 other hand, an access to "sym+addend" where "sym" is not
5407 a section symbol should not include the addend; Such an
5408 access is presumed to be an offset from "sym"; The
5409 location of interest is just "sym". */
5410 if (sym_type == STT_SECTION)
5411 toff += irel->r_addend;
5412
5413 toff = _bfd_merged_section_offset (abfd, &tsec,
5414 elf_section_data (tsec)->sec_info,
5415 toff);
5416
5417 if (sym_type != STT_SECTION)
5418 toff += irel->r_addend;
5419 }
5420 /* PLTREL24 addends are special. */
5421 else if (r_type != R_PPC_PLTREL24)
5422 toff += irel->r_addend;
5423
5424 /* Attempted -shared link of non-pic code loses. */
5425 if (tsec->output_section == NULL)
5426 continue;
5427
5428 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5429
5430 roff = irel->r_offset;
5431 reladdr = isec->output_section->vma + isec->output_offset + roff;
5432
5433 /* If the branch is in range, no need to do anything. */
5434 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5435 continue;
5436
5437 /* Look for an existing fixup to this address. */
5438 for (f = fixups; f ; f = f->next)
5439 if (f->tsec == tsec && f->toff == toff)
5440 break;
5441
5442 if (f == NULL)
5443 {
5444 size_t size;
5445 unsigned long stub_rtype;
5446
5447 val = trampoff - roff;
5448 if (val >= max_branch_offset)
5449 /* Oh dear, we can't reach a trampoline. Don't try to add
5450 one. We'll report an error later. */
5451 continue;
5452
5453 if (link_info->shared)
5454 {
5455 size = 4 * ARRAY_SIZE (shared_stub_entry);
5456 insn_offset = 12;
5457 stub_rtype = R_PPC_RELAX32PC;
5458 }
5459 else
5460 {
5461 size = 4 * ARRAY_SIZE (stub_entry);
5462 insn_offset = 0;
5463 stub_rtype = R_PPC_RELAX32;
5464 }
5465
5466 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5467 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5468 abort ();
5469 if (tsec == htab->plt
5470 || tsec == htab->glink)
5471 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5472
5473 /* Hijack the old relocation. Since we need two
5474 relocations for this use a "composite" reloc. */
5475 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5476 stub_rtype);
5477 irel->r_offset = trampoff + insn_offset;
5478
5479 /* Record the fixup so we don't do it again this section. */
5480 f = bfd_malloc (sizeof (*f));
5481 f->next = fixups;
5482 f->tsec = tsec;
5483 f->toff = toff;
5484 f->trampoff = trampoff;
5485 fixups = f;
5486
5487 trampoff += size;
5488 }
5489 else
5490 {
5491 val = f->trampoff - roff;
5492 if (val >= max_branch_offset)
5493 continue;
5494
5495 /* Nop out the reloc, since we're finalizing things here. */
5496 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5497 }
5498
5499 /* Get the section contents. */
5500 if (contents == NULL)
5501 {
5502 /* Get cached copy if it exists. */
5503 if (elf_section_data (isec)->this_hdr.contents != NULL)
5504 contents = elf_section_data (isec)->this_hdr.contents;
5505 else
5506 {
5507 /* Go get them off disk. */
5508 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5509 goto error_return;
5510 }
5511 }
5512
5513 /* Fix up the existing branch to hit the trampoline. */
5514 hit_addr = contents + roff;
5515 switch (r_type)
5516 {
5517 case R_PPC_REL24:
5518 case R_PPC_LOCAL24PC:
5519 case R_PPC_PLTREL24:
5520 t0 = bfd_get_32 (abfd, hit_addr);
5521 t0 &= ~0x3fffffc;
5522 t0 |= val & 0x3fffffc;
5523 bfd_put_32 (abfd, t0, hit_addr);
5524 break;
5525
5526 case R_PPC_REL14:
5527 case R_PPC_REL14_BRTAKEN:
5528 case R_PPC_REL14_BRNTAKEN:
5529 t0 = bfd_get_32 (abfd, hit_addr);
5530 t0 &= ~0xfffc;
5531 t0 |= val & 0xfffc;
5532 bfd_put_32 (abfd, t0, hit_addr);
5533 break;
5534 }
5535 }
5536
5537 /* Write out the trampolines. */
5538 changed = fixups != NULL;
5539 if (fixups != NULL)
5540 {
5541 const int *stub;
5542 bfd_byte *dest;
5543 bfd_vma val;
5544 int i, size;
5545
5546 do
5547 {
5548 struct one_fixup *f = fixups;
5549 fixups = fixups->next;
5550 free (f);
5551 }
5552 while (fixups);
5553
5554 contents = bfd_realloc (contents, trampoff);
5555 if (contents == NULL)
5556 goto error_return;
5557
5558 isec->size = (isec->size + 3) & (bfd_vma) -4;
5559 /* Branch around the trampolines. */
5560 val = trampoff - isec->size + 0x48000000;
5561 dest = contents + isec->size;
5562 isec->size = trampoff;
5563 bfd_put_32 (abfd, val, dest);
5564 dest += 4;
5565
5566 if (link_info->shared)
5567 {
5568 stub = shared_stub_entry;
5569 size = ARRAY_SIZE (shared_stub_entry);
5570 }
5571 else
5572 {
5573 stub = stub_entry;
5574 size = ARRAY_SIZE (stub_entry);
5575 }
5576
5577 i = 0;
5578 while (dest < contents + trampoff)
5579 {
5580 bfd_put_32 (abfd, stub[i], dest);
5581 i++;
5582 if (i == size)
5583 i = 0;
5584 dest += 4;
5585 }
5586 BFD_ASSERT (i == 0);
5587 }
5588
5589 if (isymbuf != NULL
5590 && symtab_hdr->contents != (unsigned char *) isymbuf)
5591 {
5592 if (! link_info->keep_memory)
5593 free (isymbuf);
5594 else
5595 {
5596 /* Cache the symbols for elf_link_input_bfd. */
5597 symtab_hdr->contents = (unsigned char *) isymbuf;
5598 }
5599 }
5600
5601 if (contents != NULL
5602 && elf_section_data (isec)->this_hdr.contents != contents)
5603 {
5604 if (!changed && !link_info->keep_memory)
5605 free (contents);
5606 else
5607 {
5608 /* Cache the section contents for elf_link_input_bfd. */
5609 elf_section_data (isec)->this_hdr.contents = contents;
5610 }
5611 }
5612
5613 if (elf_section_data (isec)->relocs != internal_relocs)
5614 {
5615 if (!changed)
5616 free (internal_relocs);
5617 else
5618 elf_section_data (isec)->relocs = internal_relocs;
5619 }
5620
5621 *again = changed;
5622 return TRUE;
5623
5624 error_return:
5625 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5626 free (isymbuf);
5627 if (contents != NULL
5628 && elf_section_data (isec)->this_hdr.contents != contents)
5629 free (contents);
5630 if (internal_relocs != NULL
5631 && elf_section_data (isec)->relocs != internal_relocs)
5632 free (internal_relocs);
5633 return FALSE;
5634 }
5635 \f
5636 /* What to do when ld finds relocations against symbols defined in
5637 discarded sections. */
5638
5639 static unsigned int
5640 ppc_elf_action_discarded (asection *sec)
5641 {
5642 if (strcmp (".fixup", sec->name) == 0)
5643 return 0;
5644
5645 if (strcmp (".got2", sec->name) == 0)
5646 return 0;
5647
5648 return _bfd_elf_default_action_discarded (sec);
5649 }
5650 \f
5651 /* Fill in the address for a pointer generated in a linker section. */
5652
5653 static bfd_vma
5654 elf_finish_pointer_linker_section (bfd *input_bfd,
5655 elf_linker_section_t *lsect,
5656 struct elf_link_hash_entry *h,
5657 bfd_vma relocation,
5658 const Elf_Internal_Rela *rel)
5659 {
5660 elf_linker_section_pointers_t *linker_section_ptr;
5661
5662 BFD_ASSERT (lsect != NULL);
5663
5664 if (h != NULL)
5665 {
5666 /* Handle global symbol. */
5667 struct ppc_elf_link_hash_entry *eh;
5668
5669 eh = (struct ppc_elf_link_hash_entry *) h;
5670 BFD_ASSERT (eh->elf.def_regular);
5671 linker_section_ptr = eh->linker_section_pointer;
5672 }
5673 else
5674 {
5675 /* Handle local symbol. */
5676 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5677
5678 BFD_ASSERT (is_ppc_elf_target (input_bfd->xvec));
5679 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5680 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5681 }
5682
5683 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5684 rel->r_addend,
5685 lsect);
5686 BFD_ASSERT (linker_section_ptr != NULL);
5687
5688 /* Offset will always be a multiple of four, so use the bottom bit
5689 as a "written" flag. */
5690 if ((linker_section_ptr->offset & 1) == 0)
5691 {
5692 bfd_put_32 (lsect->section->owner,
5693 relocation + linker_section_ptr->addend,
5694 lsect->section->contents + linker_section_ptr->offset);
5695 linker_section_ptr->offset += 1;
5696 }
5697
5698 relocation = (lsect->section->output_offset
5699 + linker_section_ptr->offset - 1
5700 - 0x8000);
5701
5702 #ifdef DEBUG
5703 fprintf (stderr,
5704 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5705 lsect->name, (long) relocation, (long) relocation);
5706 #endif
5707
5708 /* Subtract out the addend, because it will get added back in by the normal
5709 processing. */
5710 return relocation - linker_section_ptr->addend;
5711 }
5712
5713 /* The RELOCATE_SECTION function is called by the ELF backend linker
5714 to handle the relocations for a section.
5715
5716 The relocs are always passed as Rela structures; if the section
5717 actually uses Rel structures, the r_addend field will always be
5718 zero.
5719
5720 This function is responsible for adjust the section contents as
5721 necessary, and (if using Rela relocs and generating a
5722 relocatable output file) adjusting the reloc addend as
5723 necessary.
5724
5725 This function does not have to worry about setting the reloc
5726 address or the reloc symbol index.
5727
5728 LOCAL_SYMS is a pointer to the swapped in local symbols.
5729
5730 LOCAL_SECTIONS is an array giving the section in the input file
5731 corresponding to the st_shndx field of each local symbol.
5732
5733 The global hash table entry for the global symbols can be found
5734 via elf_sym_hashes (input_bfd).
5735
5736 When generating relocatable output, this function must handle
5737 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5738 going to be the section symbol corresponding to the output
5739 section, which means that the addend must be adjusted
5740 accordingly. */
5741
5742 static bfd_boolean
5743 ppc_elf_relocate_section (bfd *output_bfd,
5744 struct bfd_link_info *info,
5745 bfd *input_bfd,
5746 asection *input_section,
5747 bfd_byte *contents,
5748 Elf_Internal_Rela *relocs,
5749 Elf_Internal_Sym *local_syms,
5750 asection **local_sections)
5751 {
5752 Elf_Internal_Shdr *symtab_hdr;
5753 struct elf_link_hash_entry **sym_hashes;
5754 struct ppc_elf_link_hash_table *htab;
5755 Elf_Internal_Rela *rel;
5756 Elf_Internal_Rela *relend;
5757 Elf_Internal_Rela outrel;
5758 bfd_byte *loc;
5759 asection *got2, *sreloc = NULL;
5760 bfd_vma *local_got_offsets;
5761 bfd_boolean ret = TRUE;
5762 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
5763
5764 #ifdef DEBUG
5765 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5766 "%ld relocations%s",
5767 input_bfd, input_section,
5768 (long) input_section->reloc_count,
5769 (info->relocatable) ? " (relocatable)" : "");
5770 #endif
5771
5772 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5773
5774 /* Initialize howto table if not already done. */
5775 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5776 ppc_elf_howto_init ();
5777
5778 htab = ppc_elf_hash_table (info);
5779 local_got_offsets = elf_local_got_offsets (input_bfd);
5780 symtab_hdr = &elf_symtab_hdr (input_bfd);
5781 sym_hashes = elf_sym_hashes (input_bfd);
5782 rel = relocs;
5783 relend = relocs + input_section->reloc_count;
5784 for (; rel < relend; rel++)
5785 {
5786 enum elf_ppc_reloc_type r_type;
5787 bfd_vma addend;
5788 bfd_reloc_status_type r;
5789 Elf_Internal_Sym *sym;
5790 asection *sec;
5791 struct elf_link_hash_entry *h;
5792 const char *sym_name;
5793 reloc_howto_type *howto;
5794 unsigned long r_symndx;
5795 bfd_vma relocation;
5796 bfd_vma branch_bit, insn, from;
5797 bfd_boolean unresolved_reloc;
5798 bfd_boolean warned;
5799 unsigned int tls_type, tls_mask, tls_gd;
5800
5801 r_type = ELF32_R_TYPE (rel->r_info);
5802 sym = NULL;
5803 sec = NULL;
5804 h = NULL;
5805 unresolved_reloc = FALSE;
5806 warned = FALSE;
5807 r_symndx = ELF32_R_SYM (rel->r_info);
5808
5809 if (r_symndx < symtab_hdr->sh_info)
5810 {
5811 sym = local_syms + r_symndx;
5812 sec = local_sections[r_symndx];
5813 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5814
5815 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5816 }
5817 else
5818 {
5819 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5820 r_symndx, symtab_hdr, sym_hashes,
5821 h, sec, relocation,
5822 unresolved_reloc, warned);
5823
5824 sym_name = h->root.root.string;
5825 }
5826
5827 if (sec != NULL && elf_discarded_section (sec))
5828 {
5829 /* For relocs against symbols from removed linkonce sections,
5830 or sections discarded by a linker script, we just want the
5831 section contents zeroed. Avoid any special processing. */
5832 howto = NULL;
5833 if (r_type < R_PPC_max)
5834 howto = ppc_elf_howto_table[r_type];
5835 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
5836 rel->r_info = 0;
5837 rel->r_addend = 0;
5838 continue;
5839 }
5840
5841 if (info->relocatable)
5842 {
5843 if (got2 != NULL
5844 && r_type == R_PPC_PLTREL24
5845 && rel->r_addend >= 32768)
5846 {
5847 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5848 addend specifies the GOT pointer offset within .got2. */
5849 rel->r_addend += got2->output_offset;
5850 }
5851 continue;
5852 }
5853
5854 /* TLS optimizations. Replace instruction sequences and relocs
5855 based on information we collected in tls_optimize. We edit
5856 RELOCS so that --emit-relocs will output something sensible
5857 for the final instruction stream. */
5858 tls_mask = 0;
5859 tls_gd = 0;
5860 if (IS_PPC_TLS_RELOC (r_type))
5861 {
5862 if (h != NULL)
5863 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5864 else if (local_got_offsets != NULL)
5865 {
5866 char *lgot_masks;
5867 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5868 tls_mask = lgot_masks[r_symndx];
5869 }
5870 }
5871
5872 /* Ensure reloc mapping code below stays sane. */
5873 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5874 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5875 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5876 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5877 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5878 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5879 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5880 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5881 abort ();
5882 switch (r_type)
5883 {
5884 default:
5885 break;
5886
5887 case R_PPC_GOT_TPREL16:
5888 case R_PPC_GOT_TPREL16_LO:
5889 if (tls_mask != 0
5890 && (tls_mask & TLS_TPREL) == 0)
5891 {
5892 bfd_vma insn;
5893 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
5894 insn &= 31 << 21;
5895 insn |= 0x3c020000; /* addis 0,2,0 */
5896 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
5897 r_type = R_PPC_TPREL16_HA;
5898 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5899 }
5900 break;
5901
5902 case R_PPC_TLS:
5903 if (tls_mask != 0
5904 && (tls_mask & TLS_TPREL) == 0)
5905 {
5906 bfd_vma insn, rtra;
5907 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5908 if ((insn & ((31 << 26) | (31 << 11)))
5909 == ((31 << 26) | (2 << 11)))
5910 rtra = insn & ((1 << 26) - (1 << 16));
5911 else if ((insn & ((31 << 26) | (31 << 16)))
5912 == ((31 << 26) | (2 << 16)))
5913 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5914 else
5915 abort ();
5916 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5917 /* add -> addi. */
5918 insn = 14 << 26;
5919 else if ((insn & (31 << 1)) == 23 << 1
5920 && ((insn & (31 << 6)) < 14 << 6
5921 || ((insn & (31 << 6)) >= 16 << 6
5922 && (insn & (31 << 6)) < 24 << 6)))
5923 /* load and store indexed -> dform. */
5924 insn = (32 | ((insn >> 6) & 31)) << 26;
5925 else if ((insn & (31 << 1)) == 21 << 1
5926 && (insn & (0x1a << 6)) == 0)
5927 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5928 insn = (((58 | ((insn >> 6) & 4)) << 26)
5929 | ((insn >> 6) & 1));
5930 else if ((insn & (31 << 1)) == 21 << 1
5931 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5932 /* lwax -> lwa. */
5933 insn = (58 << 26) | 2;
5934 else
5935 abort ();
5936 insn |= rtra;
5937 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5938 r_type = R_PPC_TPREL16_LO;
5939 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5940
5941 /* Was PPC_TLS which sits on insn boundary, now
5942 PPC_TPREL16_LO which is at low-order half-word. */
5943 rel->r_offset += d_offset;
5944 }
5945 break;
5946
5947 case R_PPC_GOT_TLSGD16_HI:
5948 case R_PPC_GOT_TLSGD16_HA:
5949 tls_gd = TLS_TPRELGD;
5950 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5951 goto tls_gdld_hi;
5952 break;
5953
5954 case R_PPC_GOT_TLSLD16_HI:
5955 case R_PPC_GOT_TLSLD16_HA:
5956 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5957 {
5958 tls_gdld_hi:
5959 if ((tls_mask & tls_gd) != 0)
5960 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5961 + R_PPC_GOT_TPREL16);
5962 else
5963 {
5964 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5965 rel->r_offset -= d_offset;
5966 r_type = R_PPC_NONE;
5967 }
5968 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5969 }
5970 break;
5971
5972 case R_PPC_GOT_TLSGD16:
5973 case R_PPC_GOT_TLSGD16_LO:
5974 tls_gd = TLS_TPRELGD;
5975 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5976 goto tls_ldgd_opt;
5977 break;
5978
5979 case R_PPC_GOT_TLSLD16:
5980 case R_PPC_GOT_TLSLD16_LO:
5981 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5982 {
5983 bfd_vma insn1, insn2;
5984 bfd_vma offset;
5985
5986 tls_ldgd_opt:
5987 offset = rel[1].r_offset;
5988 insn1 = bfd_get_32 (output_bfd,
5989 contents + rel->r_offset - d_offset);
5990 if ((tls_mask & tls_gd) != 0)
5991 {
5992 /* IE */
5993 insn1 &= (1 << 26) - 1;
5994 insn1 |= 32 << 26; /* lwz */
5995 insn2 = 0x7c631214; /* add 3,3,2 */
5996 rel[1].r_info
5997 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
5998 rel[1].r_addend = 0;
5999 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6000 + R_PPC_GOT_TPREL16);
6001 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6002 }
6003 else
6004 {
6005 /* LE */
6006 insn1 = 0x3c620000; /* addis 3,2,0 */
6007 insn2 = 0x38630000; /* addi 3,3,0 */
6008 if (tls_gd == 0)
6009 {
6010 /* Was an LD reloc. */
6011 r_symndx = 0;
6012 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6013 }
6014 r_type = R_PPC_TPREL16_HA;
6015 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6016 rel[1].r_info = ELF32_R_INFO (r_symndx,
6017 R_PPC_TPREL16_LO);
6018 rel[1].r_offset += d_offset;
6019 rel[1].r_addend = rel->r_addend;
6020 }
6021 bfd_put_32 (output_bfd, insn1,
6022 contents + rel->r_offset - d_offset);
6023 bfd_put_32 (output_bfd, insn2, contents + offset);
6024 if (tls_gd == 0)
6025 {
6026 /* We changed the symbol on an LD reloc. Start over
6027 in order to get h, sym, sec etc. right. */
6028 rel--;
6029 continue;
6030 }
6031 }
6032 break;
6033 }
6034
6035 /* Handle other relocations that tweak non-addend part of insn. */
6036 branch_bit = 0;
6037 switch (r_type)
6038 {
6039 default:
6040 break;
6041
6042 /* Branch taken prediction relocations. */
6043 case R_PPC_ADDR14_BRTAKEN:
6044 case R_PPC_REL14_BRTAKEN:
6045 branch_bit = BRANCH_PREDICT_BIT;
6046 /* Fall thru */
6047
6048 /* Branch not taken prediction relocations. */
6049 case R_PPC_ADDR14_BRNTAKEN:
6050 case R_PPC_REL14_BRNTAKEN:
6051 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6052 insn &= ~BRANCH_PREDICT_BIT;
6053 insn |= branch_bit;
6054
6055 from = (rel->r_offset
6056 + input_section->output_offset
6057 + input_section->output_section->vma);
6058
6059 /* Invert 'y' bit if not the default. */
6060 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6061 insn ^= BRANCH_PREDICT_BIT;
6062
6063 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6064 break;
6065 }
6066
6067 addend = rel->r_addend;
6068 tls_type = 0;
6069 howto = NULL;
6070 if (r_type < R_PPC_max)
6071 howto = ppc_elf_howto_table[r_type];
6072 switch (r_type)
6073 {
6074 default:
6075 (*_bfd_error_handler)
6076 (_("%B: unknown relocation type %d for symbol %s"),
6077 input_bfd, (int) r_type, sym_name);
6078
6079 bfd_set_error (bfd_error_bad_value);
6080 ret = FALSE;
6081 continue;
6082
6083 case R_PPC_NONE:
6084 case R_PPC_TLS:
6085 case R_PPC_EMB_MRKREF:
6086 case R_PPC_GNU_VTINHERIT:
6087 case R_PPC_GNU_VTENTRY:
6088 continue;
6089
6090 /* GOT16 relocations. Like an ADDR16 using the symbol's
6091 address in the GOT as relocation value instead of the
6092 symbol's value itself. Also, create a GOT entry for the
6093 symbol and put the symbol value there. */
6094 case R_PPC_GOT_TLSGD16:
6095 case R_PPC_GOT_TLSGD16_LO:
6096 case R_PPC_GOT_TLSGD16_HI:
6097 case R_PPC_GOT_TLSGD16_HA:
6098 tls_type = TLS_TLS | TLS_GD;
6099 goto dogot;
6100
6101 case R_PPC_GOT_TLSLD16:
6102 case R_PPC_GOT_TLSLD16_LO:
6103 case R_PPC_GOT_TLSLD16_HI:
6104 case R_PPC_GOT_TLSLD16_HA:
6105 tls_type = TLS_TLS | TLS_LD;
6106 goto dogot;
6107
6108 case R_PPC_GOT_TPREL16:
6109 case R_PPC_GOT_TPREL16_LO:
6110 case R_PPC_GOT_TPREL16_HI:
6111 case R_PPC_GOT_TPREL16_HA:
6112 tls_type = TLS_TLS | TLS_TPREL;
6113 goto dogot;
6114
6115 case R_PPC_GOT_DTPREL16:
6116 case R_PPC_GOT_DTPREL16_LO:
6117 case R_PPC_GOT_DTPREL16_HI:
6118 case R_PPC_GOT_DTPREL16_HA:
6119 tls_type = TLS_TLS | TLS_DTPREL;
6120 goto dogot;
6121
6122 case R_PPC_GOT16:
6123 case R_PPC_GOT16_LO:
6124 case R_PPC_GOT16_HI:
6125 case R_PPC_GOT16_HA:
6126 dogot:
6127 {
6128 /* Relocation is to the entry for this symbol in the global
6129 offset table. */
6130 bfd_vma off;
6131 bfd_vma *offp;
6132 unsigned long indx;
6133
6134 if (htab->got == NULL)
6135 abort ();
6136
6137 indx = 0;
6138 if (tls_type == (TLS_TLS | TLS_LD)
6139 && (h == NULL
6140 || !h->def_dynamic))
6141 offp = &htab->tlsld_got.offset;
6142 else if (h != NULL)
6143 {
6144 bfd_boolean dyn;
6145 dyn = htab->elf.dynamic_sections_created;
6146 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6147 || (info->shared
6148 && SYMBOL_REFERENCES_LOCAL (info, h)))
6149 /* This is actually a static link, or it is a
6150 -Bsymbolic link and the symbol is defined
6151 locally, or the symbol was forced to be local
6152 because of a version file. */
6153 ;
6154 else
6155 {
6156 indx = h->dynindx;
6157 unresolved_reloc = FALSE;
6158 }
6159 offp = &h->got.offset;
6160 }
6161 else
6162 {
6163 if (local_got_offsets == NULL)
6164 abort ();
6165 offp = &local_got_offsets[r_symndx];
6166 }
6167
6168 /* The offset must always be a multiple of 4. We use the
6169 least significant bit to record whether we have already
6170 processed this entry. */
6171 off = *offp;
6172 if ((off & 1) != 0)
6173 off &= ~1;
6174 else
6175 {
6176 unsigned int tls_m = (tls_mask
6177 & (TLS_LD | TLS_GD | TLS_DTPREL
6178 | TLS_TPREL | TLS_TPRELGD));
6179
6180 if (offp == &htab->tlsld_got.offset)
6181 tls_m = TLS_LD;
6182 else if (h == NULL
6183 || !h->def_dynamic)
6184 tls_m &= ~TLS_LD;
6185
6186 /* We might have multiple got entries for this sym.
6187 Initialize them all. */
6188 do
6189 {
6190 int tls_ty = 0;
6191
6192 if ((tls_m & TLS_LD) != 0)
6193 {
6194 tls_ty = TLS_TLS | TLS_LD;
6195 tls_m &= ~TLS_LD;
6196 }
6197 else if ((tls_m & TLS_GD) != 0)
6198 {
6199 tls_ty = TLS_TLS | TLS_GD;
6200 tls_m &= ~TLS_GD;
6201 }
6202 else if ((tls_m & TLS_DTPREL) != 0)
6203 {
6204 tls_ty = TLS_TLS | TLS_DTPREL;
6205 tls_m &= ~TLS_DTPREL;
6206 }
6207 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6208 {
6209 tls_ty = TLS_TLS | TLS_TPREL;
6210 tls_m = 0;
6211 }
6212
6213 /* Generate relocs for the dynamic linker. */
6214 if ((info->shared || indx != 0)
6215 && (h == NULL
6216 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6217 || h->root.type != bfd_link_hash_undefweak))
6218 {
6219 outrel.r_offset = (htab->got->output_section->vma
6220 + htab->got->output_offset
6221 + off);
6222 outrel.r_addend = 0;
6223 if (tls_ty & (TLS_LD | TLS_GD))
6224 {
6225 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6226 if (tls_ty == (TLS_TLS | TLS_GD))
6227 {
6228 loc = htab->relgot->contents;
6229 loc += (htab->relgot->reloc_count++
6230 * sizeof (Elf32_External_Rela));
6231 bfd_elf32_swap_reloca_out (output_bfd,
6232 &outrel, loc);
6233 outrel.r_offset += 4;
6234 outrel.r_info
6235 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6236 }
6237 }
6238 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6239 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6240 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6241 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6242 else if (indx == 0)
6243 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6244 else
6245 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6246 if (indx == 0)
6247 {
6248 outrel.r_addend += relocation;
6249 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6250 outrel.r_addend -= htab->elf.tls_sec->vma;
6251 }
6252 loc = htab->relgot->contents;
6253 loc += (htab->relgot->reloc_count++
6254 * sizeof (Elf32_External_Rela));
6255 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6256 }
6257
6258 /* Init the .got section contents if we're not
6259 emitting a reloc. */
6260 else
6261 {
6262 bfd_vma value = relocation;
6263
6264 if (tls_ty == (TLS_TLS | TLS_LD))
6265 value = 1;
6266 else if (tls_ty != 0)
6267 {
6268 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6269 if (tls_ty == (TLS_TLS | TLS_TPREL))
6270 value += DTP_OFFSET - TP_OFFSET;
6271
6272 if (tls_ty == (TLS_TLS | TLS_GD))
6273 {
6274 bfd_put_32 (output_bfd, value,
6275 htab->got->contents + off + 4);
6276 value = 1;
6277 }
6278 }
6279 bfd_put_32 (output_bfd, value,
6280 htab->got->contents + off);
6281 }
6282
6283 off += 4;
6284 if (tls_ty & (TLS_LD | TLS_GD))
6285 off += 4;
6286 }
6287 while (tls_m != 0);
6288
6289 off = *offp;
6290 *offp = off | 1;
6291 }
6292
6293 if (off >= (bfd_vma) -2)
6294 abort ();
6295
6296 if ((tls_type & TLS_TLS) != 0)
6297 {
6298 if (tls_type != (TLS_TLS | TLS_LD))
6299 {
6300 if ((tls_mask & TLS_LD) != 0
6301 && !(h == NULL
6302 || !h->def_dynamic))
6303 off += 8;
6304 if (tls_type != (TLS_TLS | TLS_GD))
6305 {
6306 if ((tls_mask & TLS_GD) != 0)
6307 off += 8;
6308 if (tls_type != (TLS_TLS | TLS_DTPREL))
6309 {
6310 if ((tls_mask & TLS_DTPREL) != 0)
6311 off += 4;
6312 }
6313 }
6314 }
6315 }
6316
6317 relocation = htab->got->output_offset + off;
6318 relocation -= htab->elf.hgot->root.u.def.value;
6319
6320 /* Addends on got relocations don't make much sense.
6321 x+off@got is actually x@got+off, and since the got is
6322 generated by a hash table traversal, the value in the
6323 got at entry m+n bears little relation to the entry m. */
6324 if (addend != 0)
6325 (*_bfd_error_handler)
6326 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6327 input_bfd,
6328 input_section,
6329 (long) rel->r_offset,
6330 howto->name,
6331 sym_name);
6332 }
6333 break;
6334
6335 /* Relocations that need no special processing. */
6336 case R_PPC_LOCAL24PC:
6337 /* It makes no sense to point a local relocation
6338 at a symbol not in this object. */
6339 if (unresolved_reloc)
6340 {
6341 if (! (*info->callbacks->undefined_symbol) (info,
6342 h->root.root.string,
6343 input_bfd,
6344 input_section,
6345 rel->r_offset,
6346 TRUE))
6347 return FALSE;
6348 continue;
6349 }
6350 break;
6351
6352 case R_PPC_DTPREL16:
6353 case R_PPC_DTPREL16_LO:
6354 case R_PPC_DTPREL16_HI:
6355 case R_PPC_DTPREL16_HA:
6356 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6357 break;
6358
6359 /* Relocations that may need to be propagated if this is a shared
6360 object. */
6361 case R_PPC_TPREL16:
6362 case R_PPC_TPREL16_LO:
6363 case R_PPC_TPREL16_HI:
6364 case R_PPC_TPREL16_HA:
6365 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6366 /* The TPREL16 relocs shouldn't really be used in shared
6367 libs as they will result in DT_TEXTREL being set, but
6368 support them anyway. */
6369 goto dodyn;
6370
6371 case R_PPC_TPREL32:
6372 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6373 goto dodyn;
6374
6375 case R_PPC_DTPREL32:
6376 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6377 goto dodyn;
6378
6379 case R_PPC_DTPMOD32:
6380 relocation = 1;
6381 addend = 0;
6382 goto dodyn;
6383
6384 case R_PPC_REL16:
6385 case R_PPC_REL16_LO:
6386 case R_PPC_REL16_HI:
6387 case R_PPC_REL16_HA:
6388 break;
6389
6390 case R_PPC_REL24:
6391 case R_PPC_REL32:
6392 case R_PPC_REL14:
6393 case R_PPC_REL14_BRTAKEN:
6394 case R_PPC_REL14_BRNTAKEN:
6395 /* If these relocations are not to a named symbol, they can be
6396 handled right here, no need to bother the dynamic linker. */
6397 if (SYMBOL_REFERENCES_LOCAL (info, h)
6398 || h == htab->elf.hgot)
6399 break;
6400 /* fall through */
6401
6402 /* Relocations that always need to be propagated if this is a shared
6403 object. */
6404 case R_PPC_ADDR32:
6405 case R_PPC_ADDR24:
6406 case R_PPC_ADDR16:
6407 case R_PPC_ADDR16_LO:
6408 case R_PPC_ADDR16_HI:
6409 case R_PPC_ADDR16_HA:
6410 case R_PPC_ADDR14:
6411 case R_PPC_ADDR14_BRTAKEN:
6412 case R_PPC_ADDR14_BRNTAKEN:
6413 case R_PPC_UADDR32:
6414 case R_PPC_UADDR16:
6415 dodyn:
6416 if ((input_section->flags & SEC_ALLOC) == 0)
6417 break;
6418 /* Fall thru. */
6419
6420 if ((info->shared
6421 && (h == NULL
6422 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6423 || h->root.type != bfd_link_hash_undefweak)
6424 && (MUST_BE_DYN_RELOC (r_type)
6425 || !SYMBOL_CALLS_LOCAL (info, h)))
6426 || (ELIMINATE_COPY_RELOCS
6427 && !info->shared
6428 && h != NULL
6429 && h->dynindx != -1
6430 && !h->non_got_ref
6431 && h->def_dynamic
6432 && !h->def_regular))
6433 {
6434 int skip;
6435
6436 #ifdef DEBUG
6437 fprintf (stderr, "ppc_elf_relocate_section needs to "
6438 "create relocation for %s\n",
6439 (h && h->root.root.string
6440 ? h->root.root.string : "<unknown>"));
6441 #endif
6442
6443 /* When generating a shared object, these relocations
6444 are copied into the output file to be resolved at run
6445 time. */
6446 if (sreloc == NULL)
6447 {
6448 const char *name;
6449
6450 name = (bfd_elf_string_from_elf_section
6451 (input_bfd,
6452 elf_elfheader (input_bfd)->e_shstrndx,
6453 elf_section_data (input_section)->rel_hdr.sh_name));
6454 if (name == NULL)
6455 return FALSE;
6456
6457 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6458 && strcmp (bfd_get_section_name (input_bfd,
6459 input_section),
6460 name + 5) == 0);
6461
6462 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6463 BFD_ASSERT (sreloc != NULL);
6464 }
6465
6466 skip = 0;
6467
6468 outrel.r_offset =
6469 _bfd_elf_section_offset (output_bfd, info, input_section,
6470 rel->r_offset);
6471 if (outrel.r_offset == (bfd_vma) -1
6472 || outrel.r_offset == (bfd_vma) -2)
6473 skip = (int) outrel.r_offset;
6474 outrel.r_offset += (input_section->output_section->vma
6475 + input_section->output_offset);
6476
6477 if (skip)
6478 memset (&outrel, 0, sizeof outrel);
6479 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6480 {
6481 unresolved_reloc = FALSE;
6482 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6483 outrel.r_addend = rel->r_addend;
6484 }
6485 else
6486 {
6487 outrel.r_addend = relocation + rel->r_addend;
6488
6489 if (r_type == R_PPC_ADDR32)
6490 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6491 else
6492 {
6493 long indx;
6494
6495 if (bfd_is_abs_section (sec))
6496 indx = 0;
6497 else if (sec == NULL || sec->owner == NULL)
6498 {
6499 bfd_set_error (bfd_error_bad_value);
6500 return FALSE;
6501 }
6502 else
6503 {
6504 asection *osec;
6505
6506 /* We are turning this relocation into one
6507 against a section symbol. It would be
6508 proper to subtract the symbol's value,
6509 osec->vma, from the emitted reloc addend,
6510 but ld.so expects buggy relocs. */
6511 osec = sec->output_section;
6512 indx = elf_section_data (osec)->dynindx;
6513 if (indx == 0)
6514 {
6515 osec = htab->elf.text_index_section;
6516 indx = elf_section_data (osec)->dynindx;
6517 }
6518 BFD_ASSERT (indx != 0);
6519 #ifdef DEBUG
6520 if (indx == 0)
6521 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6522 indx, osec->name, osec->flags,
6523 h->root.root.string);
6524 #endif
6525 }
6526
6527 outrel.r_info = ELF32_R_INFO (indx, r_type);
6528 }
6529 }
6530
6531 loc = sreloc->contents;
6532 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6533 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6534
6535 if (skip == -1)
6536 continue;
6537
6538 /* This reloc will be computed at runtime. We clear the memory
6539 so that it contains predictable value. */
6540 if (! skip
6541 && ((input_section->flags & SEC_ALLOC) != 0
6542 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6543 {
6544 relocation = howto->pc_relative ? outrel.r_offset : 0;
6545 addend = 0;
6546 break;
6547 }
6548 }
6549 break;
6550
6551 case R_PPC_RELAX32PC_PLT:
6552 case R_PPC_RELAX32_PLT:
6553 {
6554 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6555
6556 if (htab->plt_type == PLT_NEW)
6557 relocation = (htab->glink->output_section->vma
6558 + htab->glink->output_offset
6559 + ent->glink_offset);
6560 else
6561 relocation = (htab->plt->output_section->vma
6562 + htab->plt->output_offset
6563 + ent->plt.offset);
6564 addend = 0;
6565 }
6566 if (r_type == R_PPC_RELAX32_PLT)
6567 goto relax32;
6568 /* Fall thru */
6569
6570 case R_PPC_RELAX32PC:
6571 relocation -= (input_section->output_section->vma
6572 + input_section->output_offset
6573 + rel->r_offset - 4);
6574 /* Fall thru */
6575
6576 case R_PPC_RELAX32:
6577 relax32:
6578 {
6579 unsigned long t0;
6580 unsigned long t1;
6581
6582 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6583 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6584
6585 /* We're clearing the bits for R_PPC_ADDR16_HA
6586 and R_PPC_ADDR16_LO here. */
6587 t0 &= ~0xffff;
6588 t1 &= ~0xffff;
6589
6590 /* t0 is HA, t1 is LO */
6591 relocation += addend;
6592 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6593 t1 |= relocation & 0xffff;
6594
6595 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6596 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6597 }
6598 continue;
6599
6600 /* Indirect .sdata relocation. */
6601 case R_PPC_EMB_SDAI16:
6602 BFD_ASSERT (htab->sdata[0].section != NULL);
6603 relocation
6604 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6605 h, relocation, rel);
6606 break;
6607
6608 /* Indirect .sdata2 relocation. */
6609 case R_PPC_EMB_SDA2I16:
6610 BFD_ASSERT (htab->sdata[1].section != NULL);
6611 relocation
6612 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6613 h, relocation, rel);
6614 break;
6615
6616 /* Handle the TOC16 reloc. We want to use the offset within the .got
6617 section, not the actual VMA. This is appropriate when generating
6618 an embedded ELF object, for which the .got section acts like the
6619 AIX .toc section. */
6620 case R_PPC_TOC16: /* phony GOT16 relocations */
6621 BFD_ASSERT (sec != NULL);
6622 BFD_ASSERT (bfd_is_und_section (sec)
6623 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6624 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6625
6626 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6627 break;
6628
6629 case R_PPC_PLTREL24:
6630 /* Relocation is to the entry for this symbol in the
6631 procedure linkage table. */
6632 {
6633 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6634
6635 addend = 0;
6636 if (ent == NULL
6637 || htab->plt == NULL)
6638 {
6639 /* We didn't make a PLT entry for this symbol. This
6640 happens when statically linking PIC code, or when
6641 using -Bsymbolic. */
6642 break;
6643 }
6644
6645 unresolved_reloc = FALSE;
6646 if (htab->plt_type == PLT_NEW)
6647 relocation = (htab->glink->output_section->vma
6648 + htab->glink->output_offset
6649 + ent->glink_offset);
6650 else
6651 relocation = (htab->plt->output_section->vma
6652 + htab->plt->output_offset
6653 + ent->plt.offset);
6654 }
6655 break;
6656
6657 /* Relocate against _SDA_BASE_. */
6658 case R_PPC_SDAREL16:
6659 {
6660 const char *name;
6661 struct elf_link_hash_entry *sh;
6662
6663 BFD_ASSERT (sec != NULL);
6664 name = bfd_get_section_name (abfd, sec->output_section);
6665 if (! ((CONST_STRNEQ (name, ".sdata")
6666 && (name[6] == 0 || name[6] == '.'))
6667 || (CONST_STRNEQ (name, ".sbss")
6668 && (name[5] == 0 || name[5] == '.'))))
6669 {
6670 (*_bfd_error_handler)
6671 (_("%B: the target (%s) of a %s relocation is "
6672 "in the wrong output section (%s)"),
6673 input_bfd,
6674 sym_name,
6675 howto->name,
6676 name);
6677 }
6678 sh = htab->sdata[0].sym;
6679 addend -= (sh->root.u.def.value
6680 + sh->root.u.def.section->output_offset
6681 + sh->root.u.def.section->output_section->vma);
6682 }
6683 break;
6684
6685 /* Relocate against _SDA2_BASE_. */
6686 case R_PPC_EMB_SDA2REL:
6687 {
6688 const char *name;
6689 struct elf_link_hash_entry *sh;
6690
6691 BFD_ASSERT (sec != NULL);
6692 name = bfd_get_section_name (abfd, sec->output_section);
6693 if (! (CONST_STRNEQ (name, ".sdata2")
6694 || CONST_STRNEQ (name, ".sbss2")))
6695 {
6696 (*_bfd_error_handler)
6697 (_("%B: the target (%s) of a %s relocation is "
6698 "in the wrong output section (%s)"),
6699 input_bfd,
6700 sym_name,
6701 howto->name,
6702 name);
6703
6704 bfd_set_error (bfd_error_bad_value);
6705 ret = FALSE;
6706 continue;
6707 }
6708 sh = htab->sdata[1].sym;
6709 addend -= (sh->root.u.def.value
6710 + sh->root.u.def.section->output_offset
6711 + sh->root.u.def.section->output_section->vma);
6712 }
6713 break;
6714
6715 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6716 case R_PPC_EMB_SDA21:
6717 case R_PPC_EMB_RELSDA:
6718 {
6719 const char *name;
6720 int reg;
6721 struct elf_link_hash_entry *sh;
6722
6723 BFD_ASSERT (sec != NULL);
6724 name = bfd_get_section_name (abfd, sec->output_section);
6725 if (((CONST_STRNEQ (name, ".sdata")
6726 && (name[6] == 0 || name[6] == '.'))
6727 || (CONST_STRNEQ (name, ".sbss")
6728 && (name[5] == 0 || name[5] == '.'))))
6729 {
6730 reg = 13;
6731 sh = htab->sdata[0].sym;
6732 addend -= (sh->root.u.def.value
6733 + sh->root.u.def.section->output_offset
6734 + sh->root.u.def.section->output_section->vma);
6735 }
6736
6737 else if (CONST_STRNEQ (name, ".sdata2")
6738 || CONST_STRNEQ (name, ".sbss2"))
6739 {
6740 reg = 2;
6741 sh = htab->sdata[1].sym;
6742 addend -= (sh->root.u.def.value
6743 + sh->root.u.def.section->output_offset
6744 + sh->root.u.def.section->output_section->vma);
6745 }
6746
6747 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6748 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6749 {
6750 reg = 0;
6751 }
6752
6753 else
6754 {
6755 (*_bfd_error_handler)
6756 (_("%B: the target (%s) of a %s relocation is "
6757 "in the wrong output section (%s)"),
6758 input_bfd,
6759 sym_name,
6760 howto->name,
6761 name);
6762
6763 bfd_set_error (bfd_error_bad_value);
6764 ret = FALSE;
6765 continue;
6766 }
6767
6768 if (r_type == R_PPC_EMB_SDA21)
6769 { /* fill in register field */
6770 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6771 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6772 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6773 }
6774 }
6775 break;
6776
6777 /* Relocate against the beginning of the section. */
6778 case R_PPC_SECTOFF:
6779 case R_PPC_SECTOFF_LO:
6780 case R_PPC_SECTOFF_HI:
6781 case R_PPC_SECTOFF_HA:
6782 BFD_ASSERT (sec != NULL);
6783 addend -= sec->output_section->vma;
6784 break;
6785
6786 /* Negative relocations. */
6787 case R_PPC_EMB_NADDR32:
6788 case R_PPC_EMB_NADDR16:
6789 case R_PPC_EMB_NADDR16_LO:
6790 case R_PPC_EMB_NADDR16_HI:
6791 case R_PPC_EMB_NADDR16_HA:
6792 addend -= 2 * relocation;
6793 break;
6794
6795 case R_PPC_COPY:
6796 case R_PPC_GLOB_DAT:
6797 case R_PPC_JMP_SLOT:
6798 case R_PPC_RELATIVE:
6799 case R_PPC_PLT32:
6800 case R_PPC_PLTREL32:
6801 case R_PPC_PLT16_LO:
6802 case R_PPC_PLT16_HI:
6803 case R_PPC_PLT16_HA:
6804 case R_PPC_ADDR30:
6805 case R_PPC_EMB_RELSEC16:
6806 case R_PPC_EMB_RELST_LO:
6807 case R_PPC_EMB_RELST_HI:
6808 case R_PPC_EMB_RELST_HA:
6809 case R_PPC_EMB_BIT_FLD:
6810 (*_bfd_error_handler)
6811 (_("%B: relocation %s is not yet supported for symbol %s."),
6812 input_bfd,
6813 howto->name,
6814 sym_name);
6815
6816 bfd_set_error (bfd_error_invalid_operation);
6817 ret = FALSE;
6818 continue;
6819 }
6820
6821 /* Do any further special processing. */
6822 switch (r_type)
6823 {
6824 default:
6825 break;
6826
6827 case R_PPC_ADDR16_HA:
6828 case R_PPC_REL16_HA:
6829 case R_PPC_SECTOFF_HA:
6830 case R_PPC_TPREL16_HA:
6831 case R_PPC_DTPREL16_HA:
6832 case R_PPC_EMB_NADDR16_HA:
6833 case R_PPC_EMB_RELST_HA:
6834 /* It's just possible that this symbol is a weak symbol
6835 that's not actually defined anywhere. In that case,
6836 'sec' would be NULL, and we should leave the symbol
6837 alone (it will be set to zero elsewhere in the link). */
6838 if (sec == NULL)
6839 break;
6840 /* Fall thru */
6841
6842 case R_PPC_PLT16_HA:
6843 case R_PPC_GOT16_HA:
6844 case R_PPC_GOT_TLSGD16_HA:
6845 case R_PPC_GOT_TLSLD16_HA:
6846 case R_PPC_GOT_TPREL16_HA:
6847 case R_PPC_GOT_DTPREL16_HA:
6848 /* Add 0x10000 if sign bit in 0:15 is set.
6849 Bits 0:15 are not used. */
6850 addend += 0x8000;
6851 break;
6852 }
6853
6854 #ifdef DEBUG
6855 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6856 "offset = %ld, addend = %ld\n",
6857 howto->name,
6858 (int) r_type,
6859 sym_name,
6860 r_symndx,
6861 (long) rel->r_offset,
6862 (long) addend);
6863 #endif
6864
6865 if (unresolved_reloc
6866 && !((input_section->flags & SEC_DEBUGGING) != 0
6867 && h->def_dynamic))
6868 {
6869 (*_bfd_error_handler)
6870 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6871 input_bfd,
6872 input_section,
6873 (long) rel->r_offset,
6874 howto->name,
6875 sym_name);
6876 ret = FALSE;
6877 }
6878
6879 r = _bfd_final_link_relocate (howto,
6880 input_bfd,
6881 input_section,
6882 contents,
6883 rel->r_offset,
6884 relocation,
6885 addend);
6886
6887 if (r != bfd_reloc_ok)
6888 {
6889 if (r == bfd_reloc_overflow)
6890 {
6891 if (warned)
6892 continue;
6893 if (h != NULL
6894 && h->root.type == bfd_link_hash_undefweak
6895 && howto->pc_relative)
6896 {
6897 /* Assume this is a call protected by other code that
6898 detect the symbol is undefined. If this is the case,
6899 we can safely ignore the overflow. If not, the
6900 program is hosed anyway, and a little warning isn't
6901 going to help. */
6902
6903 continue;
6904 }
6905
6906 if (! (*info->callbacks->reloc_overflow) (info,
6907 (h ? &h->root : NULL),
6908 sym_name,
6909 howto->name,
6910 rel->r_addend,
6911 input_bfd,
6912 input_section,
6913 rel->r_offset))
6914 return FALSE;
6915 }
6916 else
6917 {
6918 (*_bfd_error_handler)
6919 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6920 input_bfd, input_section,
6921 (long) rel->r_offset, howto->name, sym_name, (int) r);
6922 ret = FALSE;
6923 }
6924 }
6925 }
6926
6927 #ifdef DEBUG
6928 fprintf (stderr, "\n");
6929 #endif
6930
6931 return ret;
6932 }
6933 \f
6934 #define PPC_LO(v) ((v) & 0xffff)
6935 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6936 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6937
6938 /* Finish up dynamic symbol handling. We set the contents of various
6939 dynamic sections here. */
6940
6941 static bfd_boolean
6942 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6943 struct bfd_link_info *info,
6944 struct elf_link_hash_entry *h,
6945 Elf_Internal_Sym *sym)
6946 {
6947 struct ppc_elf_link_hash_table *htab;
6948 struct plt_entry *ent;
6949 bfd_boolean doneone;
6950
6951 #ifdef DEBUG
6952 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6953 h->root.root.string);
6954 #endif
6955
6956 htab = ppc_elf_hash_table (info);
6957 BFD_ASSERT (htab->elf.dynobj != NULL);
6958
6959 doneone = FALSE;
6960 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6961 if (ent->plt.offset != (bfd_vma) -1)
6962 {
6963 if (!doneone)
6964 {
6965 Elf_Internal_Rela rela;
6966 bfd_byte *loc;
6967 bfd_vma reloc_index;
6968
6969 if (htab->plt_type == PLT_NEW)
6970 reloc_index = ent->plt.offset / 4;
6971 else
6972 {
6973 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6974 / htab->plt_slot_size);
6975 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6976 && htab->plt_type == PLT_OLD)
6977 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6978 }
6979
6980 /* This symbol has an entry in the procedure linkage table.
6981 Set it up. */
6982 if (htab->plt_type == PLT_VXWORKS)
6983 {
6984 bfd_vma got_offset;
6985 const bfd_vma *plt_entry;
6986
6987 /* The first three entries in .got.plt are reserved. */
6988 got_offset = (reloc_index + 3) * 4;
6989
6990 /* Use the right PLT. */
6991 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6992 : ppc_elf_vxworks_plt_entry;
6993
6994 /* Fill in the .plt on VxWorks. */
6995 if (info->shared)
6996 {
6997 bfd_vma got_offset_hi = (got_offset >> 16)
6998 + ((got_offset & 0x8000) >> 15);
6999
7000 bfd_put_32 (output_bfd,
7001 plt_entry[0] | (got_offset_hi & 0xffff),
7002 htab->plt->contents + ent->plt.offset + 0);
7003 bfd_put_32 (output_bfd,
7004 plt_entry[1] | (got_offset & 0xffff),
7005 htab->plt->contents + ent->plt.offset + 4);
7006 }
7007 else
7008 {
7009 bfd_vma got_loc
7010 = (got_offset
7011 + htab->elf.hgot->root.u.def.value
7012 + htab->elf.hgot->root.u.def.section->output_offset
7013 + htab->elf.hgot->root.u.def.section->output_section->vma);
7014 bfd_vma got_loc_hi = (got_loc >> 16)
7015 + ((got_loc & 0x8000) >> 15);
7016
7017 bfd_put_32 (output_bfd,
7018 plt_entry[0] | (got_loc_hi & 0xffff),
7019 htab->plt->contents + ent->plt.offset + 0);
7020 bfd_put_32 (output_bfd,
7021 plt_entry[1] | (got_loc & 0xffff),
7022 htab->plt->contents + ent->plt.offset + 4);
7023 }
7024
7025 bfd_put_32 (output_bfd, plt_entry[2],
7026 htab->plt->contents + ent->plt.offset + 8);
7027 bfd_put_32 (output_bfd, plt_entry[3],
7028 htab->plt->contents + ent->plt.offset + 12);
7029
7030 /* This instruction is an immediate load. The value loaded is
7031 the byte offset of the R_PPC_JMP_SLOT relocation from the
7032 start of the .rela.plt section. The value is stored in the
7033 low-order 16 bits of the load instruction. */
7034 /* NOTE: It appears that this is now an index rather than a
7035 prescaled offset. */
7036 bfd_put_32 (output_bfd,
7037 plt_entry[4] | reloc_index,
7038 htab->plt->contents + ent->plt.offset + 16);
7039 /* This instruction is a PC-relative branch whose target is
7040 the start of the PLT section. The address of this branch
7041 instruction is 20 bytes beyond the start of this PLT entry.
7042 The address is encoded in bits 6-29, inclusive. The value
7043 stored is right-shifted by two bits, permitting a 26-bit
7044 offset. */
7045 bfd_put_32 (output_bfd,
7046 (plt_entry[5]
7047 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7048 htab->plt->contents + ent->plt.offset + 20);
7049 bfd_put_32 (output_bfd, plt_entry[6],
7050 htab->plt->contents + ent->plt.offset + 24);
7051 bfd_put_32 (output_bfd, plt_entry[7],
7052 htab->plt->contents + ent->plt.offset + 28);
7053
7054 /* Fill in the GOT entry corresponding to this PLT slot with
7055 the address immediately after the the "bctr" instruction
7056 in this PLT entry. */
7057 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7058 + htab->plt->output_offset
7059 + ent->plt.offset + 16),
7060 htab->sgotplt->contents + got_offset);
7061
7062 if (!info->shared)
7063 {
7064 /* Fill in a couple of entries in .rela.plt.unloaded. */
7065 loc = htab->srelplt2->contents
7066 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7067 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7068 * sizeof (Elf32_External_Rela));
7069
7070 /* Provide the @ha relocation for the first instruction. */
7071 rela.r_offset = (htab->plt->output_section->vma
7072 + htab->plt->output_offset
7073 + ent->plt.offset + 2);
7074 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7075 R_PPC_ADDR16_HA);
7076 rela.r_addend = got_offset;
7077 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7078 loc += sizeof (Elf32_External_Rela);
7079
7080 /* Provide the @l relocation for the second instruction. */
7081 rela.r_offset = (htab->plt->output_section->vma
7082 + htab->plt->output_offset
7083 + ent->plt.offset + 6);
7084 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7085 R_PPC_ADDR16_LO);
7086 rela.r_addend = got_offset;
7087 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7088 loc += sizeof (Elf32_External_Rela);
7089
7090 /* Provide a relocation for the GOT entry corresponding to this
7091 PLT slot. Point it at the middle of the .plt entry. */
7092 rela.r_offset = (htab->sgotplt->output_section->vma
7093 + htab->sgotplt->output_offset
7094 + got_offset);
7095 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7096 R_PPC_ADDR32);
7097 rela.r_addend = ent->plt.offset + 16;
7098 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7099 }
7100
7101 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7102 In particular, the offset for the relocation is not the
7103 address of the PLT entry for this function, as specified
7104 by the ABI. Instead, the offset is set to the address of
7105 the GOT slot for this function. See EABI 4.4.4.1. */
7106 rela.r_offset = (htab->sgotplt->output_section->vma
7107 + htab->sgotplt->output_offset
7108 + got_offset);
7109
7110 }
7111 else
7112 {
7113 rela.r_offset = (htab->plt->output_section->vma
7114 + htab->plt->output_offset
7115 + ent->plt.offset);
7116 if (htab->plt_type == PLT_OLD)
7117 {
7118 /* We don't need to fill in the .plt. The ppc dynamic
7119 linker will fill it in. */
7120 }
7121 else
7122 {
7123 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7124 + htab->glink->output_section->vma
7125 + htab->glink->output_offset);
7126 bfd_put_32 (output_bfd, val,
7127 htab->plt->contents + ent->plt.offset);
7128 }
7129 }
7130
7131 /* Fill in the entry in the .rela.plt section. */
7132 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7133 rela.r_addend = 0;
7134
7135 loc = (htab->relplt->contents
7136 + reloc_index * sizeof (Elf32_External_Rela));
7137 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7138
7139 if (!h->def_regular)
7140 {
7141 /* Mark the symbol as undefined, rather than as defined in
7142 the .plt section. Leave the value alone. */
7143 sym->st_shndx = SHN_UNDEF;
7144 /* If the symbol is weak, we do need to clear the value.
7145 Otherwise, the PLT entry would provide a definition for
7146 the symbol even if the symbol wasn't defined anywhere,
7147 and so the symbol would never be NULL. */
7148 if (!h->ref_regular_nonweak)
7149 sym->st_value = 0;
7150 }
7151 doneone = TRUE;
7152 }
7153
7154 if (htab->plt_type == PLT_NEW)
7155 {
7156 bfd_vma plt;
7157 unsigned char *p;
7158
7159 plt = (ent->plt.offset
7160 + htab->plt->output_section->vma
7161 + htab->plt->output_offset);
7162 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7163
7164 if (info->shared || info->pie)
7165 {
7166 bfd_vma got = 0;
7167
7168 if (ent->addend >= 32768)
7169 got = (ent->addend
7170 + ent->sec->output_section->vma
7171 + ent->sec->output_offset);
7172 else if (htab->elf.hgot != NULL)
7173 got = (htab->elf.hgot->root.u.def.value
7174 + htab->elf.hgot->root.u.def.section->output_section->vma
7175 + htab->elf.hgot->root.u.def.section->output_offset);
7176
7177 plt -= got;
7178
7179 if (plt + 0x8000 < 0x10000)
7180 {
7181 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7182 p += 4;
7183 bfd_put_32 (output_bfd, MTCTR_11, p);
7184 p += 4;
7185 bfd_put_32 (output_bfd, BCTR, p);
7186 p += 4;
7187 bfd_put_32 (output_bfd, NOP, p);
7188 p += 4;
7189 }
7190 else
7191 {
7192 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7193 p += 4;
7194 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7195 p += 4;
7196 bfd_put_32 (output_bfd, MTCTR_11, p);
7197 p += 4;
7198 bfd_put_32 (output_bfd, BCTR, p);
7199 p += 4;
7200 }
7201 }
7202 else
7203 {
7204 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7205 p += 4;
7206 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7207 p += 4;
7208 bfd_put_32 (output_bfd, MTCTR_11, p);
7209 p += 4;
7210 bfd_put_32 (output_bfd, BCTR, p);
7211 p += 4;
7212
7213 /* We only need one non-PIC glink stub. */
7214 break;
7215 }
7216 }
7217 else
7218 break;
7219 }
7220
7221 if (h->needs_copy)
7222 {
7223 asection *s;
7224 Elf_Internal_Rela rela;
7225 bfd_byte *loc;
7226
7227 /* This symbols needs a copy reloc. Set it up. */
7228
7229 #ifdef DEBUG
7230 fprintf (stderr, ", copy");
7231 #endif
7232
7233 BFD_ASSERT (h->dynindx != -1);
7234
7235 if (ppc_elf_hash_entry (h)->has_sda_refs)
7236 s = htab->relsbss;
7237 else
7238 s = htab->relbss;
7239 BFD_ASSERT (s != NULL);
7240
7241 rela.r_offset = (h->root.u.def.value
7242 + h->root.u.def.section->output_section->vma
7243 + h->root.u.def.section->output_offset);
7244 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7245 rela.r_addend = 0;
7246 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7247 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7248 }
7249
7250 #ifdef DEBUG
7251 fprintf (stderr, "\n");
7252 #endif
7253
7254 /* Mark some specially defined symbols as absolute. */
7255 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7256 || (!htab->is_vxworks
7257 && (h == htab->elf.hgot
7258 || strcmp (h->root.root.string,
7259 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7260 sym->st_shndx = SHN_ABS;
7261
7262 return TRUE;
7263 }
7264 \f
7265 static enum elf_reloc_type_class
7266 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7267 {
7268 switch (ELF32_R_TYPE (rela->r_info))
7269 {
7270 case R_PPC_RELATIVE:
7271 return reloc_class_relative;
7272 case R_PPC_REL24:
7273 case R_PPC_ADDR24:
7274 case R_PPC_JMP_SLOT:
7275 return reloc_class_plt;
7276 case R_PPC_COPY:
7277 return reloc_class_copy;
7278 default:
7279 return reloc_class_normal;
7280 }
7281 }
7282 \f
7283 /* Finish up the dynamic sections. */
7284
7285 static bfd_boolean
7286 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7287 struct bfd_link_info *info)
7288 {
7289 asection *sdyn;
7290 asection *splt;
7291 struct ppc_elf_link_hash_table *htab;
7292 bfd_vma got;
7293 bfd * dynobj;
7294
7295 #ifdef DEBUG
7296 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7297 #endif
7298
7299 htab = ppc_elf_hash_table (info);
7300 dynobj = elf_hash_table (info)->dynobj;
7301 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7302 if (htab->is_vxworks)
7303 splt = bfd_get_section_by_name (dynobj, ".plt");
7304 else
7305 splt = NULL;
7306
7307 got = 0;
7308 if (htab->elf.hgot != NULL)
7309 got = (htab->elf.hgot->root.u.def.value
7310 + htab->elf.hgot->root.u.def.section->output_section->vma
7311 + htab->elf.hgot->root.u.def.section->output_offset);
7312
7313 if (htab->elf.dynamic_sections_created)
7314 {
7315 Elf32_External_Dyn *dyncon, *dynconend;
7316
7317 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7318
7319 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7320 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7321 for (; dyncon < dynconend; dyncon++)
7322 {
7323 Elf_Internal_Dyn dyn;
7324 asection *s;
7325
7326 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7327
7328 switch (dyn.d_tag)
7329 {
7330 case DT_PLTGOT:
7331 if (htab->is_vxworks)
7332 s = htab->sgotplt;
7333 else
7334 s = htab->plt;
7335 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7336 break;
7337
7338 case DT_PLTRELSZ:
7339 dyn.d_un.d_val = htab->relplt->size;
7340 break;
7341
7342 case DT_JMPREL:
7343 s = htab->relplt;
7344 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7345 break;
7346
7347 case DT_PPC_GOT:
7348 dyn.d_un.d_ptr = got;
7349 break;
7350
7351 case DT_RELASZ:
7352 if (htab->is_vxworks)
7353 {
7354 if (htab->relplt)
7355 dyn.d_un.d_ptr -= htab->relplt->size;
7356 break;
7357 }
7358 continue;
7359
7360 default:
7361 if (htab->is_vxworks
7362 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7363 break;
7364 continue;
7365 }
7366
7367 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7368 }
7369 }
7370
7371 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7372 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7373 if (htab->got != NULL)
7374 {
7375 unsigned char *p = htab->got->contents;
7376 bfd_vma val;
7377
7378 p += htab->elf.hgot->root.u.def.value;
7379 if (htab->plt_type == PLT_OLD)
7380 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7381
7382 val = 0;
7383 if (sdyn != NULL)
7384 val = sdyn->output_section->vma + sdyn->output_offset;
7385 bfd_put_32 (output_bfd, val, p);
7386
7387 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7388 }
7389
7390 /* Fill in the first entry in the VxWorks procedure linkage table. */
7391 if (splt && splt->size > 0)
7392 {
7393 /* Use the right PLT. */
7394 static const bfd_vma *plt_entry = NULL;
7395 plt_entry = info->shared ?
7396 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7397
7398 if (!info->shared)
7399 {
7400 bfd_vma got_value =
7401 (htab->elf.hgot->root.u.def.section->output_section->vma
7402 + htab->elf.hgot->root.u.def.section->output_offset
7403 + htab->elf.hgot->root.u.def.value);
7404 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7405
7406 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7407 splt->contents + 0);
7408 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7409 splt->contents + 4);
7410 }
7411 else
7412 {
7413 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7414 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7415 }
7416 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7417 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7418 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7419 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7420 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7421 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7422
7423 if (! info->shared)
7424 {
7425 Elf_Internal_Rela rela;
7426 bfd_byte *loc;
7427
7428 loc = htab->srelplt2->contents;
7429
7430 /* Output the @ha relocation for the first instruction. */
7431 rela.r_offset = (htab->plt->output_section->vma
7432 + htab->plt->output_offset
7433 + 2);
7434 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7435 rela.r_addend = 0;
7436 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7437 loc += sizeof (Elf32_External_Rela);
7438
7439 /* Output the @l relocation for the second instruction. */
7440 rela.r_offset = (htab->plt->output_section->vma
7441 + htab->plt->output_offset
7442 + 6);
7443 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7444 rela.r_addend = 0;
7445 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7446 loc += sizeof (Elf32_External_Rela);
7447
7448 /* Fix up the remaining relocations. They may have the wrong
7449 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7450 in which symbols were output. */
7451 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7452 {
7453 Elf_Internal_Rela rel;
7454
7455 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7456 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7457 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7458 loc += sizeof (Elf32_External_Rela);
7459
7460 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7461 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7462 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7463 loc += sizeof (Elf32_External_Rela);
7464
7465 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7466 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7467 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7468 loc += sizeof (Elf32_External_Rela);
7469 }
7470 }
7471 }
7472
7473 if (htab->glink != NULL && htab->glink->contents != NULL)
7474 {
7475 unsigned char *p;
7476 unsigned char *endp;
7477 bfd_vma res0;
7478 unsigned int i;
7479
7480 /*
7481 * PIC glink code is the following:
7482 *
7483 * # ith PLT code stub.
7484 * addis 11,30,(plt+(i-1)*4-got)@ha
7485 * lwz 11,(plt+(i-1)*4-got)@l(11)
7486 * mtctr 11
7487 * bctr
7488 *
7489 * # A table of branches, one for each plt entry.
7490 * # The idea is that the plt call stub loads ctr (and r11) with these
7491 * # addresses, so (r11 - res_0) gives the plt index * 4.
7492 * res_0: b PLTresolve
7493 * res_1: b PLTresolve
7494 * .
7495 * # Some number of entries towards the end can be nops
7496 * res_n_m3: nop
7497 * res_n_m2: nop
7498 * res_n_m1:
7499 *
7500 * PLTresolve:
7501 * addis 11,11,(1f-res_0)@ha
7502 * mflr 0
7503 * bcl 20,31,1f
7504 * 1: addi 11,11,(1b-res_0)@l
7505 * mflr 12
7506 * mtlr 0
7507 * sub 11,11,12 # r11 = index * 4
7508 * addis 12,12,(got+4-1b)@ha
7509 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7510 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7511 * mtctr 0
7512 * add 0,11,11
7513 * add 11,0,11 # r11 = index * 12 = reloc offset.
7514 * bctr
7515 */
7516 static const unsigned int pic_plt_resolve[] =
7517 {
7518 ADDIS_11_11,
7519 MFLR_0,
7520 BCL_20_31,
7521 ADDI_11_11,
7522 MFLR_12,
7523 MTLR_0,
7524 SUB_11_11_12,
7525 ADDIS_12_12,
7526 LWZ_0_12,
7527 LWZ_12_12,
7528 MTCTR_0,
7529 ADD_0_11_11,
7530 ADD_11_0_11,
7531 BCTR,
7532 NOP,
7533 NOP
7534 };
7535
7536 static const unsigned int plt_resolve[] =
7537 {
7538 LIS_12,
7539 ADDIS_11_11,
7540 LWZ_0_12,
7541 ADDI_11_11,
7542 MTCTR_0,
7543 ADD_0_11_11,
7544 LWZ_12_12,
7545 ADD_11_0_11,
7546 BCTR,
7547 NOP,
7548 NOP,
7549 NOP,
7550 NOP,
7551 NOP,
7552 NOP,
7553 NOP
7554 };
7555
7556 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7557 abort ();
7558 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7559 abort ();
7560
7561 /* Build the branch table, one for each plt entry (less one),
7562 and perhaps some padding. */
7563 p = htab->glink->contents;
7564 p += htab->glink_pltresolve;
7565 endp = htab->glink->contents;
7566 endp += htab->glink->size - GLINK_PLTRESOLVE;
7567 while (p < endp - 8 * 4)
7568 {
7569 bfd_put_32 (output_bfd, B + endp - p, p);
7570 p += 4;
7571 }
7572 while (p < endp)
7573 {
7574 bfd_put_32 (output_bfd, NOP, p);
7575 p += 4;
7576 }
7577
7578 res0 = (htab->glink_pltresolve
7579 + htab->glink->output_section->vma
7580 + htab->glink->output_offset);
7581
7582 /* Last comes the PLTresolve stub. */
7583 if (info->shared || info->pie)
7584 {
7585 bfd_vma bcl;
7586
7587 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7588 {
7589 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7590 p += 4;
7591 }
7592 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7593
7594 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7595 + htab->glink->output_section->vma
7596 + htab->glink->output_offset);
7597
7598 bfd_put_32 (output_bfd,
7599 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7600 bfd_put_32 (output_bfd,
7601 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7602 bfd_put_32 (output_bfd,
7603 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7604 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7605 {
7606 bfd_put_32 (output_bfd,
7607 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7608 bfd_put_32 (output_bfd,
7609 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7610 }
7611 else
7612 {
7613 bfd_put_32 (output_bfd,
7614 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7615 bfd_put_32 (output_bfd,
7616 LWZ_12_12 + 4, p + 9*4);
7617 }
7618 }
7619 else
7620 {
7621 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7622 {
7623 bfd_put_32 (output_bfd, plt_resolve[i], p);
7624 p += 4;
7625 }
7626 p -= 4 * ARRAY_SIZE (plt_resolve);
7627
7628 bfd_put_32 (output_bfd,
7629 LIS_12 + PPC_HA (got + 4), p + 0*4);
7630 bfd_put_32 (output_bfd,
7631 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7632 bfd_put_32 (output_bfd,
7633 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7634 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7635 {
7636 bfd_put_32 (output_bfd,
7637 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7638 bfd_put_32 (output_bfd,
7639 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7640 }
7641 else
7642 {
7643 bfd_put_32 (output_bfd,
7644 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7645 bfd_put_32 (output_bfd,
7646 LWZ_12_12 + 4, p + 6*4);
7647 }
7648 }
7649 }
7650
7651 return TRUE;
7652 }
7653 \f
7654 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7655 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7656 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7657 #define TARGET_BIG_NAME "elf32-powerpc"
7658 #define ELF_ARCH bfd_arch_powerpc
7659 #define ELF_MACHINE_CODE EM_PPC
7660 #ifdef __QNXTARGET__
7661 #define ELF_MAXPAGESIZE 0x1000
7662 #else
7663 #define ELF_MAXPAGESIZE 0x10000
7664 #endif
7665 #define ELF_MINPAGESIZE 0x1000
7666 #define ELF_COMMONPAGESIZE 0x1000
7667 #define elf_info_to_howto ppc_elf_info_to_howto
7668
7669 #ifdef EM_CYGNUS_POWERPC
7670 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7671 #endif
7672
7673 #ifdef EM_PPC_OLD
7674 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7675 #endif
7676
7677 #define elf_backend_plt_not_loaded 1
7678 #define elf_backend_can_gc_sections 1
7679 #define elf_backend_can_refcount 1
7680 #define elf_backend_rela_normal 1
7681
7682 #define bfd_elf32_mkobject ppc_elf_mkobject
7683 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7684 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7685 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7686 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
7687 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7688 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7689
7690 #define elf_backend_object_p ppc_elf_object_p
7691 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7692 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7693 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7694 #define elf_backend_relocate_section ppc_elf_relocate_section
7695 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7696 #define elf_backend_check_relocs ppc_elf_check_relocs
7697 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7698 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7699 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7700 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7701 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7702 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7703 #define elf_backend_fake_sections ppc_elf_fake_sections
7704 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7705 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7706 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7707 #define elf_backend_write_core_note ppc_elf_write_core_note
7708 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7709 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7710 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7711 #define elf_backend_write_section ppc_elf_write_section
7712 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7713 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7714 #define elf_backend_action_discarded ppc_elf_action_discarded
7715 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7716
7717 #include "elf32-target.h"
7718
7719 /* VxWorks Target */
7720
7721 #undef TARGET_LITTLE_SYM
7722 #undef TARGET_LITTLE_NAME
7723
7724 #undef TARGET_BIG_SYM
7725 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7726 #undef TARGET_BIG_NAME
7727 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7728
7729 /* VxWorks uses the elf default section flags for .plt. */
7730 static const struct bfd_elf_special_section *
7731 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7732 {
7733 if (sec->name == NULL)
7734 return NULL;
7735
7736 if (strcmp (sec->name, ".plt") == 0)
7737 return _bfd_elf_get_sec_type_attr (abfd, sec);
7738
7739 return ppc_elf_get_sec_type_attr (abfd, sec);
7740 }
7741
7742 /* Like ppc_elf_link_hash_table_create, but overrides
7743 appropriately for VxWorks. */
7744 static struct bfd_link_hash_table *
7745 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7746 {
7747 struct bfd_link_hash_table *ret;
7748
7749 ret = ppc_elf_link_hash_table_create (abfd);
7750 if (ret)
7751 {
7752 struct ppc_elf_link_hash_table *htab
7753 = (struct ppc_elf_link_hash_table *)ret;
7754 htab->is_vxworks = 1;
7755 htab->plt_type = PLT_VXWORKS;
7756 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7757 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7758 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7759 }
7760 return ret;
7761 }
7762
7763 /* Tweak magic VxWorks symbols as they are loaded. */
7764 static bfd_boolean
7765 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7766 struct bfd_link_info *info,
7767 Elf_Internal_Sym *sym,
7768 const char **namep ATTRIBUTE_UNUSED,
7769 flagword *flagsp ATTRIBUTE_UNUSED,
7770 asection **secp,
7771 bfd_vma *valp)
7772 {
7773 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7774 valp))
7775 return FALSE;
7776
7777 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7778 }
7779
7780 static void
7781 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7782 {
7783 ppc_elf_final_write_processing(abfd, linker);
7784 elf_vxworks_final_write_processing(abfd, linker);
7785 }
7786
7787 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7788 define it. */
7789 #undef elf_backend_want_plt_sym
7790 #define elf_backend_want_plt_sym 1
7791 #undef elf_backend_want_got_plt
7792 #define elf_backend_want_got_plt 1
7793 #undef elf_backend_got_symbol_offset
7794 #define elf_backend_got_symbol_offset 0
7795 #undef elf_backend_plt_not_loaded
7796 #define elf_backend_plt_not_loaded 0
7797 #undef elf_backend_plt_readonly
7798 #define elf_backend_plt_readonly 1
7799 #undef elf_backend_got_header_size
7800 #define elf_backend_got_header_size 12
7801
7802 #undef bfd_elf32_bfd_link_hash_table_create
7803 #define bfd_elf32_bfd_link_hash_table_create \
7804 ppc_elf_vxworks_link_hash_table_create
7805 #undef elf_backend_add_symbol_hook
7806 #define elf_backend_add_symbol_hook \
7807 ppc_elf_vxworks_add_symbol_hook
7808 #undef elf_backend_link_output_symbol_hook
7809 #define elf_backend_link_output_symbol_hook \
7810 elf_vxworks_link_output_symbol_hook
7811 #undef elf_backend_final_write_processing
7812 #define elf_backend_final_write_processing \
7813 ppc_elf_vxworks_final_write_processing
7814 #undef elf_backend_get_sec_type_attr
7815 #define elf_backend_get_sec_type_attr \
7816 ppc_elf_vxworks_get_sec_type_attr
7817 #undef elf_backend_emit_relocs
7818 #define elf_backend_emit_relocs \
7819 elf_vxworks_emit_relocs
7820
7821 #undef elf32_bed
7822 #define elf32_bed ppc_elf_vxworks_bed
7823
7824 #include "elf32-target.h"
GDB Binutils - Deliverables
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