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[thirdparty/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
161 /* The value of a defined global symbol. */
162 #define SYM_VAL(SYM) \
163 ((SYM)->root.u.def.section->output_section->vma \
164 + (SYM)->root.u.def.section->output_offset \
165 + (SYM)->root.u.def.value)
166 \f
167 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
168
169 static reloc_howto_type ppc_elf_howto_raw[] = {
170 /* This reloc does nothing. */
171 HOWTO (R_PPC_NONE, /* type */
172 0, /* rightshift */
173 2, /* size (0 = byte, 1 = short, 2 = long) */
174 32, /* bitsize */
175 FALSE, /* pc_relative */
176 0, /* bitpos */
177 complain_overflow_bitfield, /* complain_on_overflow */
178 bfd_elf_generic_reloc, /* special_function */
179 "R_PPC_NONE", /* name */
180 FALSE, /* partial_inplace */
181 0, /* src_mask */
182 0, /* dst_mask */
183 FALSE), /* pcrel_offset */
184
185 /* A standard 32 bit relocation. */
186 HOWTO (R_PPC_ADDR32, /* type */
187 0, /* rightshift */
188 2, /* size (0 = byte, 1 = short, 2 = long) */
189 32, /* bitsize */
190 FALSE, /* pc_relative */
191 0, /* bitpos */
192 complain_overflow_bitfield, /* complain_on_overflow */
193 bfd_elf_generic_reloc, /* special_function */
194 "R_PPC_ADDR32", /* name */
195 FALSE, /* partial_inplace */
196 0, /* src_mask */
197 0xffffffff, /* dst_mask */
198 FALSE), /* pcrel_offset */
199
200 /* An absolute 26 bit branch; the lower two bits must be zero.
201 FIXME: we don't check that, we just clear them. */
202 HOWTO (R_PPC_ADDR24, /* type */
203 0, /* rightshift */
204 2, /* size (0 = byte, 1 = short, 2 = long) */
205 26, /* bitsize */
206 FALSE, /* pc_relative */
207 0, /* bitpos */
208 complain_overflow_bitfield, /* complain_on_overflow */
209 bfd_elf_generic_reloc, /* special_function */
210 "R_PPC_ADDR24", /* name */
211 FALSE, /* partial_inplace */
212 0, /* src_mask */
213 0x3fffffc, /* dst_mask */
214 FALSE), /* pcrel_offset */
215
216 /* A standard 16 bit relocation. */
217 HOWTO (R_PPC_ADDR16, /* type */
218 0, /* rightshift */
219 1, /* size (0 = byte, 1 = short, 2 = long) */
220 16, /* bitsize */
221 FALSE, /* pc_relative */
222 0, /* bitpos */
223 complain_overflow_bitfield, /* complain_on_overflow */
224 bfd_elf_generic_reloc, /* special_function */
225 "R_PPC_ADDR16", /* name */
226 FALSE, /* partial_inplace */
227 0, /* src_mask */
228 0xffff, /* dst_mask */
229 FALSE), /* pcrel_offset */
230
231 /* A 16 bit relocation without overflow. */
232 HOWTO (R_PPC_ADDR16_LO, /* type */
233 0, /* rightshift */
234 1, /* size (0 = byte, 1 = short, 2 = long) */
235 16, /* bitsize */
236 FALSE, /* pc_relative */
237 0, /* bitpos */
238 complain_overflow_dont,/* complain_on_overflow */
239 bfd_elf_generic_reloc, /* special_function */
240 "R_PPC_ADDR16_LO", /* name */
241 FALSE, /* partial_inplace */
242 0, /* src_mask */
243 0xffff, /* dst_mask */
244 FALSE), /* pcrel_offset */
245
246 /* The high order 16 bits of an address. */
247 HOWTO (R_PPC_ADDR16_HI, /* type */
248 16, /* rightshift */
249 1, /* size (0 = byte, 1 = short, 2 = long) */
250 16, /* bitsize */
251 FALSE, /* pc_relative */
252 0, /* bitpos */
253 complain_overflow_dont, /* complain_on_overflow */
254 bfd_elf_generic_reloc, /* special_function */
255 "R_PPC_ADDR16_HI", /* name */
256 FALSE, /* partial_inplace */
257 0, /* src_mask */
258 0xffff, /* dst_mask */
259 FALSE), /* pcrel_offset */
260
261 /* The high order 16 bits of an address, plus 1 if the contents of
262 the low 16 bits, treated as a signed number, is negative. */
263 HOWTO (R_PPC_ADDR16_HA, /* type */
264 16, /* rightshift */
265 1, /* size (0 = byte, 1 = short, 2 = long) */
266 16, /* bitsize */
267 FALSE, /* pc_relative */
268 0, /* bitpos */
269 complain_overflow_dont, /* complain_on_overflow */
270 ppc_elf_addr16_ha_reloc, /* special_function */
271 "R_PPC_ADDR16_HA", /* name */
272 FALSE, /* partial_inplace */
273 0, /* src_mask */
274 0xffff, /* dst_mask */
275 FALSE), /* pcrel_offset */
276
277 /* An absolute 16 bit branch; the lower two bits must be zero.
278 FIXME: we don't check that, we just clear them. */
279 HOWTO (R_PPC_ADDR14, /* type */
280 0, /* rightshift */
281 2, /* size (0 = byte, 1 = short, 2 = long) */
282 16, /* bitsize */
283 FALSE, /* pc_relative */
284 0, /* bitpos */
285 complain_overflow_bitfield, /* complain_on_overflow */
286 bfd_elf_generic_reloc, /* special_function */
287 "R_PPC_ADDR14", /* name */
288 FALSE, /* partial_inplace */
289 0, /* src_mask */
290 0xfffc, /* dst_mask */
291 FALSE), /* pcrel_offset */
292
293 /* An absolute 16 bit branch, for which bit 10 should be set to
294 indicate that the branch is expected to be taken. The lower two
295 bits must be zero. */
296 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
297 0, /* rightshift */
298 2, /* size (0 = byte, 1 = short, 2 = long) */
299 16, /* bitsize */
300 FALSE, /* pc_relative */
301 0, /* bitpos */
302 complain_overflow_bitfield, /* complain_on_overflow */
303 bfd_elf_generic_reloc, /* special_function */
304 "R_PPC_ADDR14_BRTAKEN",/* name */
305 FALSE, /* partial_inplace */
306 0, /* src_mask */
307 0xfffc, /* dst_mask */
308 FALSE), /* pcrel_offset */
309
310 /* An absolute 16 bit branch, for which bit 10 should be set to
311 indicate that the branch is not expected to be taken. The lower
312 two bits must be zero. */
313 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 16, /* bitsize */
317 FALSE, /* pc_relative */
318 0, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 bfd_elf_generic_reloc, /* special_function */
321 "R_PPC_ADDR14_BRNTAKEN",/* name */
322 FALSE, /* partial_inplace */
323 0, /* src_mask */
324 0xfffc, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A relative 26 bit branch; the lower two bits must be zero. */
328 HOWTO (R_PPC_REL24, /* type */
329 0, /* rightshift */
330 2, /* size (0 = byte, 1 = short, 2 = long) */
331 26, /* bitsize */
332 TRUE, /* pc_relative */
333 0, /* bitpos */
334 complain_overflow_signed, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 "R_PPC_REL24", /* name */
337 FALSE, /* partial_inplace */
338 0, /* src_mask */
339 0x3fffffc, /* dst_mask */
340 TRUE), /* pcrel_offset */
341
342 /* A relative 16 bit branch; the lower two bits must be zero. */
343 HOWTO (R_PPC_REL14, /* type */
344 0, /* rightshift */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
346 16, /* bitsize */
347 TRUE, /* pc_relative */
348 0, /* bitpos */
349 complain_overflow_signed, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 "R_PPC_REL14", /* name */
352 FALSE, /* partial_inplace */
353 0, /* src_mask */
354 0xfffc, /* dst_mask */
355 TRUE), /* pcrel_offset */
356
357 /* A relative 16 bit branch. Bit 10 should be set to indicate that
358 the branch is expected to be taken. The lower two bits must be
359 zero. */
360 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 TRUE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 "R_PPC_REL14_BRTAKEN", /* name */
369 FALSE, /* partial_inplace */
370 0, /* src_mask */
371 0xfffc, /* dst_mask */
372 TRUE), /* pcrel_offset */
373
374 /* A relative 16 bit branch. Bit 10 should be set to indicate that
375 the branch is not expected to be taken. The lower two bits must
376 be zero. */
377 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
378 0, /* rightshift */
379 2, /* size (0 = byte, 1 = short, 2 = long) */
380 16, /* bitsize */
381 TRUE, /* pc_relative */
382 0, /* bitpos */
383 complain_overflow_signed, /* complain_on_overflow */
384 bfd_elf_generic_reloc, /* special_function */
385 "R_PPC_REL14_BRNTAKEN",/* name */
386 FALSE, /* partial_inplace */
387 0, /* src_mask */
388 0xfffc, /* dst_mask */
389 TRUE), /* pcrel_offset */
390
391 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
392 symbol. */
393 HOWTO (R_PPC_GOT16, /* type */
394 0, /* rightshift */
395 1, /* size (0 = byte, 1 = short, 2 = long) */
396 16, /* bitsize */
397 FALSE, /* pc_relative */
398 0, /* bitpos */
399 complain_overflow_signed, /* complain_on_overflow */
400 bfd_elf_generic_reloc, /* special_function */
401 "R_PPC_GOT16", /* name */
402 FALSE, /* partial_inplace */
403 0, /* src_mask */
404 0xffff, /* dst_mask */
405 FALSE), /* pcrel_offset */
406
407 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
408 the symbol. */
409 HOWTO (R_PPC_GOT16_LO, /* type */
410 0, /* rightshift */
411 1, /* size (0 = byte, 1 = short, 2 = long) */
412 16, /* bitsize */
413 FALSE, /* pc_relative */
414 0, /* bitpos */
415 complain_overflow_dont, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 "R_PPC_GOT16_LO", /* name */
418 FALSE, /* partial_inplace */
419 0, /* src_mask */
420 0xffff, /* dst_mask */
421 FALSE), /* pcrel_offset */
422
423 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
424 the symbol. */
425 HOWTO (R_PPC_GOT16_HI, /* type */
426 16, /* rightshift */
427 1, /* size (0 = byte, 1 = short, 2 = long) */
428 16, /* bitsize */
429 FALSE, /* pc_relative */
430 0, /* bitpos */
431 complain_overflow_bitfield, /* complain_on_overflow */
432 bfd_elf_generic_reloc, /* special_function */
433 "R_PPC_GOT16_HI", /* name */
434 FALSE, /* partial_inplace */
435 0, /* src_mask */
436 0xffff, /* dst_mask */
437 FALSE), /* pcrel_offset */
438
439 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
440 the symbol. */
441 HOWTO (R_PPC_GOT16_HA, /* type */
442 16, /* rightshift */
443 1, /* size (0 = byte, 1 = short, 2 = long) */
444 16, /* bitsize */
445 FALSE, /* pc_relative */
446 0, /* bitpos */
447 complain_overflow_bitfield, /* complain_on_overflow */
448 ppc_elf_addr16_ha_reloc, /* special_function */
449 "R_PPC_GOT16_HA", /* name */
450 FALSE, /* partial_inplace */
451 0, /* src_mask */
452 0xffff, /* dst_mask */
453 FALSE), /* pcrel_offset */
454
455 /* Like R_PPC_REL24, but referring to the procedure linkage table
456 entry for the symbol. */
457 HOWTO (R_PPC_PLTREL24, /* type */
458 0, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 26, /* bitsize */
461 TRUE, /* pc_relative */
462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 "R_PPC_PLTREL24", /* name */
466 FALSE, /* partial_inplace */
467 0, /* src_mask */
468 0x3fffffc, /* dst_mask */
469 TRUE), /* pcrel_offset */
470
471 /* This is used only by the dynamic linker. The symbol should exist
472 both in the object being run and in some shared library. The
473 dynamic linker copies the data addressed by the symbol from the
474 shared library into the object, because the object being
475 run has to have the data at some particular address. */
476 HOWTO (R_PPC_COPY, /* type */
477 0, /* rightshift */
478 2, /* size (0 = byte, 1 = short, 2 = long) */
479 32, /* bitsize */
480 FALSE, /* pc_relative */
481 0, /* bitpos */
482 complain_overflow_bitfield, /* complain_on_overflow */
483 bfd_elf_generic_reloc, /* special_function */
484 "R_PPC_COPY", /* name */
485 FALSE, /* partial_inplace */
486 0, /* src_mask */
487 0, /* dst_mask */
488 FALSE), /* pcrel_offset */
489
490 /* Like R_PPC_ADDR32, but used when setting global offset table
491 entries. */
492 HOWTO (R_PPC_GLOB_DAT, /* type */
493 0, /* rightshift */
494 2, /* size (0 = byte, 1 = short, 2 = long) */
495 32, /* bitsize */
496 FALSE, /* pc_relative */
497 0, /* bitpos */
498 complain_overflow_bitfield, /* complain_on_overflow */
499 bfd_elf_generic_reloc, /* special_function */
500 "R_PPC_GLOB_DAT", /* name */
501 FALSE, /* partial_inplace */
502 0, /* src_mask */
503 0xffffffff, /* dst_mask */
504 FALSE), /* pcrel_offset */
505
506 /* Marks a procedure linkage table entry for a symbol. */
507 HOWTO (R_PPC_JMP_SLOT, /* type */
508 0, /* rightshift */
509 2, /* size (0 = byte, 1 = short, 2 = long) */
510 32, /* bitsize */
511 FALSE, /* pc_relative */
512 0, /* bitpos */
513 complain_overflow_bitfield, /* complain_on_overflow */
514 bfd_elf_generic_reloc, /* special_function */
515 "R_PPC_JMP_SLOT", /* name */
516 FALSE, /* partial_inplace */
517 0, /* src_mask */
518 0, /* dst_mask */
519 FALSE), /* pcrel_offset */
520
521 /* Used only by the dynamic linker. When the object is run, this
522 longword is set to the load address of the object, plus the
523 addend. */
524 HOWTO (R_PPC_RELATIVE, /* type */
525 0, /* rightshift */
526 2, /* size (0 = byte, 1 = short, 2 = long) */
527 32, /* bitsize */
528 FALSE, /* pc_relative */
529 0, /* bitpos */
530 complain_overflow_bitfield, /* complain_on_overflow */
531 bfd_elf_generic_reloc, /* special_function */
532 "R_PPC_RELATIVE", /* name */
533 FALSE, /* partial_inplace */
534 0, /* src_mask */
535 0xffffffff, /* dst_mask */
536 FALSE), /* pcrel_offset */
537
538 /* Like R_PPC_REL24, but uses the value of the symbol within the
539 object rather than the final value. Normally used for
540 _GLOBAL_OFFSET_TABLE_. */
541 HOWTO (R_PPC_LOCAL24PC, /* type */
542 0, /* rightshift */
543 2, /* size (0 = byte, 1 = short, 2 = long) */
544 26, /* bitsize */
545 TRUE, /* pc_relative */
546 0, /* bitpos */
547 complain_overflow_signed, /* complain_on_overflow */
548 bfd_elf_generic_reloc, /* special_function */
549 "R_PPC_LOCAL24PC", /* name */
550 FALSE, /* partial_inplace */
551 0, /* src_mask */
552 0x3fffffc, /* dst_mask */
553 TRUE), /* pcrel_offset */
554
555 /* Like R_PPC_ADDR32, but may be unaligned. */
556 HOWTO (R_PPC_UADDR32, /* type */
557 0, /* rightshift */
558 2, /* size (0 = byte, 1 = short, 2 = long) */
559 32, /* bitsize */
560 FALSE, /* pc_relative */
561 0, /* bitpos */
562 complain_overflow_bitfield, /* complain_on_overflow */
563 bfd_elf_generic_reloc, /* special_function */
564 "R_PPC_UADDR32", /* name */
565 FALSE, /* partial_inplace */
566 0, /* src_mask */
567 0xffffffff, /* dst_mask */
568 FALSE), /* pcrel_offset */
569
570 /* Like R_PPC_ADDR16, but may be unaligned. */
571 HOWTO (R_PPC_UADDR16, /* type */
572 0, /* rightshift */
573 1, /* size (0 = byte, 1 = short, 2 = long) */
574 16, /* bitsize */
575 FALSE, /* pc_relative */
576 0, /* bitpos */
577 complain_overflow_bitfield, /* complain_on_overflow */
578 bfd_elf_generic_reloc, /* special_function */
579 "R_PPC_UADDR16", /* name */
580 FALSE, /* partial_inplace */
581 0, /* src_mask */
582 0xffff, /* dst_mask */
583 FALSE), /* pcrel_offset */
584
585 /* 32-bit PC relative */
586 HOWTO (R_PPC_REL32, /* type */
587 0, /* rightshift */
588 2, /* size (0 = byte, 1 = short, 2 = long) */
589 32, /* bitsize */
590 TRUE, /* pc_relative */
591 0, /* bitpos */
592 complain_overflow_bitfield, /* complain_on_overflow */
593 bfd_elf_generic_reloc, /* special_function */
594 "R_PPC_REL32", /* name */
595 FALSE, /* partial_inplace */
596 0, /* src_mask */
597 0xffffffff, /* dst_mask */
598 TRUE), /* pcrel_offset */
599
600 /* 32-bit relocation to the symbol's procedure linkage table.
601 FIXME: not supported. */
602 HOWTO (R_PPC_PLT32, /* type */
603 0, /* rightshift */
604 2, /* size (0 = byte, 1 = short, 2 = long) */
605 32, /* bitsize */
606 FALSE, /* pc_relative */
607 0, /* bitpos */
608 complain_overflow_bitfield, /* complain_on_overflow */
609 bfd_elf_generic_reloc, /* special_function */
610 "R_PPC_PLT32", /* name */
611 FALSE, /* partial_inplace */
612 0, /* src_mask */
613 0, /* dst_mask */
614 FALSE), /* pcrel_offset */
615
616 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
617 FIXME: not supported. */
618 HOWTO (R_PPC_PLTREL32, /* type */
619 0, /* rightshift */
620 2, /* size (0 = byte, 1 = short, 2 = long) */
621 32, /* bitsize */
622 TRUE, /* pc_relative */
623 0, /* bitpos */
624 complain_overflow_bitfield, /* complain_on_overflow */
625 bfd_elf_generic_reloc, /* special_function */
626 "R_PPC_PLTREL32", /* name */
627 FALSE, /* partial_inplace */
628 0, /* src_mask */
629 0, /* dst_mask */
630 TRUE), /* pcrel_offset */
631
632 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
633 the symbol. */
634 HOWTO (R_PPC_PLT16_LO, /* type */
635 0, /* rightshift */
636 1, /* size (0 = byte, 1 = short, 2 = long) */
637 16, /* bitsize */
638 FALSE, /* pc_relative */
639 0, /* bitpos */
640 complain_overflow_dont, /* complain_on_overflow */
641 bfd_elf_generic_reloc, /* special_function */
642 "R_PPC_PLT16_LO", /* name */
643 FALSE, /* partial_inplace */
644 0, /* src_mask */
645 0xffff, /* dst_mask */
646 FALSE), /* pcrel_offset */
647
648 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
649 the symbol. */
650 HOWTO (R_PPC_PLT16_HI, /* type */
651 16, /* rightshift */
652 1, /* size (0 = byte, 1 = short, 2 = long) */
653 16, /* bitsize */
654 FALSE, /* pc_relative */
655 0, /* bitpos */
656 complain_overflow_bitfield, /* complain_on_overflow */
657 bfd_elf_generic_reloc, /* special_function */
658 "R_PPC_PLT16_HI", /* name */
659 FALSE, /* partial_inplace */
660 0, /* src_mask */
661 0xffff, /* dst_mask */
662 FALSE), /* pcrel_offset */
663
664 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
665 the symbol. */
666 HOWTO (R_PPC_PLT16_HA, /* type */
667 16, /* rightshift */
668 1, /* size (0 = byte, 1 = short, 2 = long) */
669 16, /* bitsize */
670 FALSE, /* pc_relative */
671 0, /* bitpos */
672 complain_overflow_bitfield, /* complain_on_overflow */
673 ppc_elf_addr16_ha_reloc, /* special_function */
674 "R_PPC_PLT16_HA", /* name */
675 FALSE, /* partial_inplace */
676 0, /* src_mask */
677 0xffff, /* dst_mask */
678 FALSE), /* pcrel_offset */
679
680 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
681 small data items. */
682 HOWTO (R_PPC_SDAREL16, /* type */
683 0, /* rightshift */
684 1, /* size (0 = byte, 1 = short, 2 = long) */
685 16, /* bitsize */
686 FALSE, /* pc_relative */
687 0, /* bitpos */
688 complain_overflow_signed, /* complain_on_overflow */
689 bfd_elf_generic_reloc, /* special_function */
690 "R_PPC_SDAREL16", /* name */
691 FALSE, /* partial_inplace */
692 0, /* src_mask */
693 0xffff, /* dst_mask */
694 FALSE), /* pcrel_offset */
695
696 /* 16-bit section relative relocation. */
697 HOWTO (R_PPC_SECTOFF, /* type */
698 0, /* rightshift */
699 1, /* size (0 = byte, 1 = short, 2 = long) */
700 16, /* bitsize */
701 FALSE, /* pc_relative */
702 0, /* bitpos */
703 complain_overflow_bitfield, /* complain_on_overflow */
704 bfd_elf_generic_reloc, /* special_function */
705 "R_PPC_SECTOFF", /* name */
706 FALSE, /* partial_inplace */
707 0, /* src_mask */
708 0xffff, /* dst_mask */
709 FALSE), /* pcrel_offset */
710
711 /* 16-bit lower half section relative relocation. */
712 HOWTO (R_PPC_SECTOFF_LO, /* type */
713 0, /* rightshift */
714 1, /* size (0 = byte, 1 = short, 2 = long) */
715 16, /* bitsize */
716 FALSE, /* pc_relative */
717 0, /* bitpos */
718 complain_overflow_dont, /* complain_on_overflow */
719 bfd_elf_generic_reloc, /* special_function */
720 "R_PPC_SECTOFF_LO", /* name */
721 FALSE, /* partial_inplace */
722 0, /* src_mask */
723 0xffff, /* dst_mask */
724 FALSE), /* pcrel_offset */
725
726 /* 16-bit upper half section relative relocation. */
727 HOWTO (R_PPC_SECTOFF_HI, /* type */
728 16, /* rightshift */
729 1, /* size (0 = byte, 1 = short, 2 = long) */
730 16, /* bitsize */
731 FALSE, /* pc_relative */
732 0, /* bitpos */
733 complain_overflow_bitfield, /* complain_on_overflow */
734 bfd_elf_generic_reloc, /* special_function */
735 "R_PPC_SECTOFF_HI", /* name */
736 FALSE, /* partial_inplace */
737 0, /* src_mask */
738 0xffff, /* dst_mask */
739 FALSE), /* pcrel_offset */
740
741 /* 16-bit upper half adjusted section relative relocation. */
742 HOWTO (R_PPC_SECTOFF_HA, /* type */
743 16, /* rightshift */
744 1, /* size (0 = byte, 1 = short, 2 = long) */
745 16, /* bitsize */
746 FALSE, /* pc_relative */
747 0, /* bitpos */
748 complain_overflow_bitfield, /* complain_on_overflow */
749 ppc_elf_addr16_ha_reloc, /* special_function */
750 "R_PPC_SECTOFF_HA", /* name */
751 FALSE, /* partial_inplace */
752 0, /* src_mask */
753 0xffff, /* dst_mask */
754 FALSE), /* pcrel_offset */
755
756 /* Marker reloc for TLS. */
757 HOWTO (R_PPC_TLS,
758 0, /* rightshift */
759 2, /* size (0 = byte, 1 = short, 2 = long) */
760 32, /* bitsize */
761 FALSE, /* pc_relative */
762 0, /* bitpos */
763 complain_overflow_dont, /* complain_on_overflow */
764 bfd_elf_generic_reloc, /* special_function */
765 "R_PPC_TLS", /* name */
766 FALSE, /* partial_inplace */
767 0, /* src_mask */
768 0, /* dst_mask */
769 FALSE), /* pcrel_offset */
770
771 /* Computes the load module index of the load module that contains the
772 definition of its TLS sym. */
773 HOWTO (R_PPC_DTPMOD32,
774 0, /* rightshift */
775 2, /* size (0 = byte, 1 = short, 2 = long) */
776 32, /* bitsize */
777 FALSE, /* pc_relative */
778 0, /* bitpos */
779 complain_overflow_dont, /* complain_on_overflow */
780 ppc_elf_unhandled_reloc, /* special_function */
781 "R_PPC_DTPMOD32", /* name */
782 FALSE, /* partial_inplace */
783 0, /* src_mask */
784 0xffffffff, /* dst_mask */
785 FALSE), /* pcrel_offset */
786
787 /* Computes a dtv-relative displacement, the difference between the value
788 of sym+add and the base address of the thread-local storage block that
789 contains the definition of sym, minus 0x8000. */
790 HOWTO (R_PPC_DTPREL32,
791 0, /* rightshift */
792 2, /* size (0 = byte, 1 = short, 2 = long) */
793 32, /* bitsize */
794 FALSE, /* pc_relative */
795 0, /* bitpos */
796 complain_overflow_dont, /* complain_on_overflow */
797 ppc_elf_unhandled_reloc, /* special_function */
798 "R_PPC_DTPREL32", /* name */
799 FALSE, /* partial_inplace */
800 0, /* src_mask */
801 0xffffffff, /* dst_mask */
802 FALSE), /* pcrel_offset */
803
804 /* A 16 bit dtprel reloc. */
805 HOWTO (R_PPC_DTPREL16,
806 0, /* rightshift */
807 1, /* size (0 = byte, 1 = short, 2 = long) */
808 16, /* bitsize */
809 FALSE, /* pc_relative */
810 0, /* bitpos */
811 complain_overflow_signed, /* complain_on_overflow */
812 ppc_elf_unhandled_reloc, /* special_function */
813 "R_PPC_DTPREL16", /* name */
814 FALSE, /* partial_inplace */
815 0, /* src_mask */
816 0xffff, /* dst_mask */
817 FALSE), /* pcrel_offset */
818
819 /* Like DTPREL16, but no overflow. */
820 HOWTO (R_PPC_DTPREL16_LO,
821 0, /* rightshift */
822 1, /* size (0 = byte, 1 = short, 2 = long) */
823 16, /* bitsize */
824 FALSE, /* pc_relative */
825 0, /* bitpos */
826 complain_overflow_dont, /* complain_on_overflow */
827 ppc_elf_unhandled_reloc, /* special_function */
828 "R_PPC_DTPREL16_LO", /* name */
829 FALSE, /* partial_inplace */
830 0, /* src_mask */
831 0xffff, /* dst_mask */
832 FALSE), /* pcrel_offset */
833
834 /* Like DTPREL16_LO, but next higher group of 16 bits. */
835 HOWTO (R_PPC_DTPREL16_HI,
836 16, /* rightshift */
837 1, /* size (0 = byte, 1 = short, 2 = long) */
838 16, /* bitsize */
839 FALSE, /* pc_relative */
840 0, /* bitpos */
841 complain_overflow_dont, /* complain_on_overflow */
842 ppc_elf_unhandled_reloc, /* special_function */
843 "R_PPC_DTPREL16_HI", /* name */
844 FALSE, /* partial_inplace */
845 0, /* src_mask */
846 0xffff, /* dst_mask */
847 FALSE), /* pcrel_offset */
848
849 /* Like DTPREL16_HI, but adjust for low 16 bits. */
850 HOWTO (R_PPC_DTPREL16_HA,
851 16, /* rightshift */
852 1, /* size (0 = byte, 1 = short, 2 = long) */
853 16, /* bitsize */
854 FALSE, /* pc_relative */
855 0, /* bitpos */
856 complain_overflow_dont, /* complain_on_overflow */
857 ppc_elf_unhandled_reloc, /* special_function */
858 "R_PPC_DTPREL16_HA", /* name */
859 FALSE, /* partial_inplace */
860 0, /* src_mask */
861 0xffff, /* dst_mask */
862 FALSE), /* pcrel_offset */
863
864 /* Computes a tp-relative displacement, the difference between the value of
865 sym+add and the value of the thread pointer (r13). */
866 HOWTO (R_PPC_TPREL32,
867 0, /* rightshift */
868 2, /* size (0 = byte, 1 = short, 2 = long) */
869 32, /* bitsize */
870 FALSE, /* pc_relative */
871 0, /* bitpos */
872 complain_overflow_dont, /* complain_on_overflow */
873 ppc_elf_unhandled_reloc, /* special_function */
874 "R_PPC_TPREL32", /* name */
875 FALSE, /* partial_inplace */
876 0, /* src_mask */
877 0xffffffff, /* dst_mask */
878 FALSE), /* pcrel_offset */
879
880 /* A 16 bit tprel reloc. */
881 HOWTO (R_PPC_TPREL16,
882 0, /* rightshift */
883 1, /* size (0 = byte, 1 = short, 2 = long) */
884 16, /* bitsize */
885 FALSE, /* pc_relative */
886 0, /* bitpos */
887 complain_overflow_signed, /* complain_on_overflow */
888 ppc_elf_unhandled_reloc, /* special_function */
889 "R_PPC_TPREL16", /* name */
890 FALSE, /* partial_inplace */
891 0, /* src_mask */
892 0xffff, /* dst_mask */
893 FALSE), /* pcrel_offset */
894
895 /* Like TPREL16, but no overflow. */
896 HOWTO (R_PPC_TPREL16_LO,
897 0, /* rightshift */
898 1, /* size (0 = byte, 1 = short, 2 = long) */
899 16, /* bitsize */
900 FALSE, /* pc_relative */
901 0, /* bitpos */
902 complain_overflow_dont, /* complain_on_overflow */
903 ppc_elf_unhandled_reloc, /* special_function */
904 "R_PPC_TPREL16_LO", /* name */
905 FALSE, /* partial_inplace */
906 0, /* src_mask */
907 0xffff, /* dst_mask */
908 FALSE), /* pcrel_offset */
909
910 /* Like TPREL16_LO, but next higher group of 16 bits. */
911 HOWTO (R_PPC_TPREL16_HI,
912 16, /* rightshift */
913 1, /* size (0 = byte, 1 = short, 2 = long) */
914 16, /* bitsize */
915 FALSE, /* pc_relative */
916 0, /* bitpos */
917 complain_overflow_dont, /* complain_on_overflow */
918 ppc_elf_unhandled_reloc, /* special_function */
919 "R_PPC_TPREL16_HI", /* name */
920 FALSE, /* partial_inplace */
921 0, /* src_mask */
922 0xffff, /* dst_mask */
923 FALSE), /* pcrel_offset */
924
925 /* Like TPREL16_HI, but adjust for low 16 bits. */
926 HOWTO (R_PPC_TPREL16_HA,
927 16, /* rightshift */
928 1, /* size (0 = byte, 1 = short, 2 = long) */
929 16, /* bitsize */
930 FALSE, /* pc_relative */
931 0, /* bitpos */
932 complain_overflow_dont, /* complain_on_overflow */
933 ppc_elf_unhandled_reloc, /* special_function */
934 "R_PPC_TPREL16_HA", /* name */
935 FALSE, /* partial_inplace */
936 0, /* src_mask */
937 0xffff, /* dst_mask */
938 FALSE), /* pcrel_offset */
939
940 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
941 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
942 to the first entry. */
943 HOWTO (R_PPC_GOT_TLSGD16,
944 0, /* rightshift */
945 1, /* size (0 = byte, 1 = short, 2 = long) */
946 16, /* bitsize */
947 FALSE, /* pc_relative */
948 0, /* bitpos */
949 complain_overflow_signed, /* complain_on_overflow */
950 ppc_elf_unhandled_reloc, /* special_function */
951 "R_PPC_GOT_TLSGD16", /* name */
952 FALSE, /* partial_inplace */
953 0, /* src_mask */
954 0xffff, /* dst_mask */
955 FALSE), /* pcrel_offset */
956
957 /* Like GOT_TLSGD16, but no overflow. */
958 HOWTO (R_PPC_GOT_TLSGD16_LO,
959 0, /* rightshift */
960 1, /* size (0 = byte, 1 = short, 2 = long) */
961 16, /* bitsize */
962 FALSE, /* pc_relative */
963 0, /* bitpos */
964 complain_overflow_dont, /* complain_on_overflow */
965 ppc_elf_unhandled_reloc, /* special_function */
966 "R_PPC_GOT_TLSGD16_LO", /* name */
967 FALSE, /* partial_inplace */
968 0, /* src_mask */
969 0xffff, /* dst_mask */
970 FALSE), /* pcrel_offset */
971
972 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
973 HOWTO (R_PPC_GOT_TLSGD16_HI,
974 16, /* rightshift */
975 1, /* size (0 = byte, 1 = short, 2 = long) */
976 16, /* bitsize */
977 FALSE, /* pc_relative */
978 0, /* bitpos */
979 complain_overflow_dont, /* complain_on_overflow */
980 ppc_elf_unhandled_reloc, /* special_function */
981 "R_PPC_GOT_TLSGD16_HI", /* name */
982 FALSE, /* partial_inplace */
983 0, /* src_mask */
984 0xffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
986
987 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
988 HOWTO (R_PPC_GOT_TLSGD16_HA,
989 16, /* rightshift */
990 1, /* size (0 = byte, 1 = short, 2 = long) */
991 16, /* bitsize */
992 FALSE, /* pc_relative */
993 0, /* bitpos */
994 complain_overflow_dont, /* complain_on_overflow */
995 ppc_elf_unhandled_reloc, /* special_function */
996 "R_PPC_GOT_TLSGD16_HA", /* name */
997 FALSE, /* partial_inplace */
998 0, /* src_mask */
999 0xffff, /* dst_mask */
1000 FALSE), /* pcrel_offset */
1001
1002 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
1003 with values (sym+add)@dtpmod and zero, and computes the offset to the
1004 first entry. */
1005 HOWTO (R_PPC_GOT_TLSLD16,
1006 0, /* rightshift */
1007 1, /* size (0 = byte, 1 = short, 2 = long) */
1008 16, /* bitsize */
1009 FALSE, /* pc_relative */
1010 0, /* bitpos */
1011 complain_overflow_signed, /* complain_on_overflow */
1012 ppc_elf_unhandled_reloc, /* special_function */
1013 "R_PPC_GOT_TLSLD16", /* name */
1014 FALSE, /* partial_inplace */
1015 0, /* src_mask */
1016 0xffff, /* dst_mask */
1017 FALSE), /* pcrel_offset */
1018
1019 /* Like GOT_TLSLD16, but no overflow. */
1020 HOWTO (R_PPC_GOT_TLSLD16_LO,
1021 0, /* rightshift */
1022 1, /* size (0 = byte, 1 = short, 2 = long) */
1023 16, /* bitsize */
1024 FALSE, /* pc_relative */
1025 0, /* bitpos */
1026 complain_overflow_dont, /* complain_on_overflow */
1027 ppc_elf_unhandled_reloc, /* special_function */
1028 "R_PPC_GOT_TLSLD16_LO", /* name */
1029 FALSE, /* partial_inplace */
1030 0, /* src_mask */
1031 0xffff, /* dst_mask */
1032 FALSE), /* pcrel_offset */
1033
1034 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1035 HOWTO (R_PPC_GOT_TLSLD16_HI,
1036 16, /* rightshift */
1037 1, /* size (0 = byte, 1 = short, 2 = long) */
1038 16, /* bitsize */
1039 FALSE, /* pc_relative */
1040 0, /* bitpos */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 ppc_elf_unhandled_reloc, /* special_function */
1043 "R_PPC_GOT_TLSLD16_HI", /* name */
1044 FALSE, /* partial_inplace */
1045 0, /* src_mask */
1046 0xffff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1048
1049 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1050 HOWTO (R_PPC_GOT_TLSLD16_HA,
1051 16, /* rightshift */
1052 1, /* size (0 = byte, 1 = short, 2 = long) */
1053 16, /* bitsize */
1054 FALSE, /* pc_relative */
1055 0, /* bitpos */
1056 complain_overflow_dont, /* complain_on_overflow */
1057 ppc_elf_unhandled_reloc, /* special_function */
1058 "R_PPC_GOT_TLSLD16_HA", /* name */
1059 FALSE, /* partial_inplace */
1060 0, /* src_mask */
1061 0xffff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1063
1064 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1065 the offset to the entry. */
1066 HOWTO (R_PPC_GOT_DTPREL16,
1067 0, /* rightshift */
1068 1, /* size (0 = byte, 1 = short, 2 = long) */
1069 16, /* bitsize */
1070 FALSE, /* pc_relative */
1071 0, /* bitpos */
1072 complain_overflow_signed, /* complain_on_overflow */
1073 ppc_elf_unhandled_reloc, /* special_function */
1074 "R_PPC_GOT_DTPREL16", /* name */
1075 FALSE, /* partial_inplace */
1076 0, /* src_mask */
1077 0xffff, /* dst_mask */
1078 FALSE), /* pcrel_offset */
1079
1080 /* Like GOT_DTPREL16, but no overflow. */
1081 HOWTO (R_PPC_GOT_DTPREL16_LO,
1082 0, /* rightshift */
1083 1, /* size (0 = byte, 1 = short, 2 = long) */
1084 16, /* bitsize */
1085 FALSE, /* pc_relative */
1086 0, /* bitpos */
1087 complain_overflow_dont, /* complain_on_overflow */
1088 ppc_elf_unhandled_reloc, /* special_function */
1089 "R_PPC_GOT_DTPREL16_LO", /* name */
1090 FALSE, /* partial_inplace */
1091 0, /* src_mask */
1092 0xffff, /* dst_mask */
1093 FALSE), /* pcrel_offset */
1094
1095 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1096 HOWTO (R_PPC_GOT_DTPREL16_HI,
1097 16, /* rightshift */
1098 1, /* size (0 = byte, 1 = short, 2 = long) */
1099 16, /* bitsize */
1100 FALSE, /* pc_relative */
1101 0, /* bitpos */
1102 complain_overflow_dont, /* complain_on_overflow */
1103 ppc_elf_unhandled_reloc, /* special_function */
1104 "R_PPC_GOT_DTPREL16_HI", /* name */
1105 FALSE, /* partial_inplace */
1106 0, /* src_mask */
1107 0xffff, /* dst_mask */
1108 FALSE), /* pcrel_offset */
1109
1110 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1111 HOWTO (R_PPC_GOT_DTPREL16_HA,
1112 16, /* rightshift */
1113 1, /* size (0 = byte, 1 = short, 2 = long) */
1114 16, /* bitsize */
1115 FALSE, /* pc_relative */
1116 0, /* bitpos */
1117 complain_overflow_dont, /* complain_on_overflow */
1118 ppc_elf_unhandled_reloc, /* special_function */
1119 "R_PPC_GOT_DTPREL16_HA", /* name */
1120 FALSE, /* partial_inplace */
1121 0, /* src_mask */
1122 0xffff, /* dst_mask */
1123 FALSE), /* pcrel_offset */
1124
1125 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1126 offset to the entry. */
1127 HOWTO (R_PPC_GOT_TPREL16,
1128 0, /* rightshift */
1129 1, /* size (0 = byte, 1 = short, 2 = long) */
1130 16, /* bitsize */
1131 FALSE, /* pc_relative */
1132 0, /* bitpos */
1133 complain_overflow_signed, /* complain_on_overflow */
1134 ppc_elf_unhandled_reloc, /* special_function */
1135 "R_PPC_GOT_TPREL16", /* name */
1136 FALSE, /* partial_inplace */
1137 0, /* src_mask */
1138 0xffff, /* dst_mask */
1139 FALSE), /* pcrel_offset */
1140
1141 /* Like GOT_TPREL16, but no overflow. */
1142 HOWTO (R_PPC_GOT_TPREL16_LO,
1143 0, /* rightshift */
1144 1, /* size (0 = byte, 1 = short, 2 = long) */
1145 16, /* bitsize */
1146 FALSE, /* pc_relative */
1147 0, /* bitpos */
1148 complain_overflow_dont, /* complain_on_overflow */
1149 ppc_elf_unhandled_reloc, /* special_function */
1150 "R_PPC_GOT_TPREL16_LO", /* name */
1151 FALSE, /* partial_inplace */
1152 0, /* src_mask */
1153 0xffff, /* dst_mask */
1154 FALSE), /* pcrel_offset */
1155
1156 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1157 HOWTO (R_PPC_GOT_TPREL16_HI,
1158 16, /* rightshift */
1159 1, /* size (0 = byte, 1 = short, 2 = long) */
1160 16, /* bitsize */
1161 FALSE, /* pc_relative */
1162 0, /* bitpos */
1163 complain_overflow_dont, /* complain_on_overflow */
1164 ppc_elf_unhandled_reloc, /* special_function */
1165 "R_PPC_GOT_TPREL16_HI", /* name */
1166 FALSE, /* partial_inplace */
1167 0, /* src_mask */
1168 0xffff, /* dst_mask */
1169 FALSE), /* pcrel_offset */
1170
1171 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1172 HOWTO (R_PPC_GOT_TPREL16_HA,
1173 16, /* rightshift */
1174 1, /* size (0 = byte, 1 = short, 2 = long) */
1175 16, /* bitsize */
1176 FALSE, /* pc_relative */
1177 0, /* bitpos */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 ppc_elf_unhandled_reloc, /* special_function */
1180 "R_PPC_GOT_TPREL16_HA", /* name */
1181 FALSE, /* partial_inplace */
1182 0, /* src_mask */
1183 0xffff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1185
1186 /* The remaining relocs are from the Embedded ELF ABI, and are not
1187 in the SVR4 ELF ABI. */
1188
1189 /* 32 bit value resulting from the addend minus the symbol. */
1190 HOWTO (R_PPC_EMB_NADDR32, /* type */
1191 0, /* rightshift */
1192 2, /* size (0 = byte, 1 = short, 2 = long) */
1193 32, /* bitsize */
1194 FALSE, /* pc_relative */
1195 0, /* bitpos */
1196 complain_overflow_bitfield, /* complain_on_overflow */
1197 bfd_elf_generic_reloc, /* special_function */
1198 "R_PPC_EMB_NADDR32", /* name */
1199 FALSE, /* partial_inplace */
1200 0, /* src_mask */
1201 0xffffffff, /* dst_mask */
1202 FALSE), /* pcrel_offset */
1203
1204 /* 16 bit value resulting from the addend minus the symbol. */
1205 HOWTO (R_PPC_EMB_NADDR16, /* type */
1206 0, /* rightshift */
1207 1, /* size (0 = byte, 1 = short, 2 = long) */
1208 16, /* bitsize */
1209 FALSE, /* pc_relative */
1210 0, /* bitpos */
1211 complain_overflow_bitfield, /* complain_on_overflow */
1212 bfd_elf_generic_reloc, /* special_function */
1213 "R_PPC_EMB_NADDR16", /* name */
1214 FALSE, /* partial_inplace */
1215 0, /* src_mask */
1216 0xffff, /* dst_mask */
1217 FALSE), /* pcrel_offset */
1218
1219 /* 16 bit value resulting from the addend minus the symbol. */
1220 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1221 0, /* rightshift */
1222 1, /* size (0 = byte, 1 = short, 2 = long) */
1223 16, /* bitsize */
1224 FALSE, /* pc_relative */
1225 0, /* bitpos */
1226 complain_overflow_dont,/* complain_on_overflow */
1227 bfd_elf_generic_reloc, /* special_function */
1228 "R_PPC_EMB_ADDR16_LO", /* name */
1229 FALSE, /* partial_inplace */
1230 0, /* src_mask */
1231 0xffff, /* dst_mask */
1232 FALSE), /* pcrel_offset */
1233
1234 /* The high order 16 bits of the addend minus the symbol. */
1235 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1236 16, /* rightshift */
1237 1, /* size (0 = byte, 1 = short, 2 = long) */
1238 16, /* bitsize */
1239 FALSE, /* pc_relative */
1240 0, /* bitpos */
1241 complain_overflow_dont, /* complain_on_overflow */
1242 bfd_elf_generic_reloc, /* special_function */
1243 "R_PPC_EMB_NADDR16_HI", /* name */
1244 FALSE, /* partial_inplace */
1245 0, /* src_mask */
1246 0xffff, /* dst_mask */
1247 FALSE), /* pcrel_offset */
1248
1249 /* The high order 16 bits of the result of the addend minus the address,
1250 plus 1 if the contents of the low 16 bits, treated as a signed number,
1251 is negative. */
1252 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1253 16, /* rightshift */
1254 1, /* size (0 = byte, 1 = short, 2 = long) */
1255 16, /* bitsize */
1256 FALSE, /* pc_relative */
1257 0, /* bitpos */
1258 complain_overflow_dont, /* complain_on_overflow */
1259 ppc_elf_addr16_ha_reloc, /* special_function */
1260 "R_PPC_EMB_NADDR16_HA", /* name */
1261 FALSE, /* partial_inplace */
1262 0, /* src_mask */
1263 0xffff, /* dst_mask */
1264 FALSE), /* pcrel_offset */
1265
1266 /* 16 bit value resulting from allocating a 4 byte word to hold an
1267 address in the .sdata section, and returning the offset from
1268 _SDA_BASE_ for that relocation. */
1269 HOWTO (R_PPC_EMB_SDAI16, /* type */
1270 0, /* rightshift */
1271 1, /* size (0 = byte, 1 = short, 2 = long) */
1272 16, /* bitsize */
1273 FALSE, /* pc_relative */
1274 0, /* bitpos */
1275 complain_overflow_bitfield, /* complain_on_overflow */
1276 bfd_elf_generic_reloc, /* special_function */
1277 "R_PPC_EMB_SDAI16", /* name */
1278 FALSE, /* partial_inplace */
1279 0, /* src_mask */
1280 0xffff, /* dst_mask */
1281 FALSE), /* pcrel_offset */
1282
1283 /* 16 bit value resulting from allocating a 4 byte word to hold an
1284 address in the .sdata2 section, and returning the offset from
1285 _SDA2_BASE_ for that relocation. */
1286 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1287 0, /* rightshift */
1288 1, /* size (0 = byte, 1 = short, 2 = long) */
1289 16, /* bitsize */
1290 FALSE, /* pc_relative */
1291 0, /* bitpos */
1292 complain_overflow_bitfield, /* complain_on_overflow */
1293 bfd_elf_generic_reloc, /* special_function */
1294 "R_PPC_EMB_SDA2I16", /* name */
1295 FALSE, /* partial_inplace */
1296 0, /* src_mask */
1297 0xffff, /* dst_mask */
1298 FALSE), /* pcrel_offset */
1299
1300 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1301 small data items. */
1302 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1303 0, /* rightshift */
1304 1, /* size (0 = byte, 1 = short, 2 = long) */
1305 16, /* bitsize */
1306 FALSE, /* pc_relative */
1307 0, /* bitpos */
1308 complain_overflow_signed, /* complain_on_overflow */
1309 bfd_elf_generic_reloc, /* special_function */
1310 "R_PPC_EMB_SDA2REL", /* name */
1311 FALSE, /* partial_inplace */
1312 0, /* src_mask */
1313 0xffff, /* dst_mask */
1314 FALSE), /* pcrel_offset */
1315
1316 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1317 signed offset from the appropriate base, and filling in the register
1318 field with the appropriate register (0, 2, or 13). */
1319 HOWTO (R_PPC_EMB_SDA21, /* type */
1320 0, /* rightshift */
1321 2, /* size (0 = byte, 1 = short, 2 = long) */
1322 16, /* bitsize */
1323 FALSE, /* pc_relative */
1324 0, /* bitpos */
1325 complain_overflow_signed, /* complain_on_overflow */
1326 bfd_elf_generic_reloc, /* special_function */
1327 "R_PPC_EMB_SDA21", /* name */
1328 FALSE, /* partial_inplace */
1329 0, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1332
1333 /* Relocation not handled: R_PPC_EMB_MRKREF */
1334 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1335 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1336 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1337 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1338 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1339
1340 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1341 in the 16 bit signed offset from the appropriate base, and filling in the
1342 register field with the appropriate register (0, 2, or 13). */
1343 HOWTO (R_PPC_EMB_RELSDA, /* type */
1344 0, /* rightshift */
1345 1, /* size (0 = byte, 1 = short, 2 = long) */
1346 16, /* bitsize */
1347 TRUE, /* pc_relative */
1348 0, /* bitpos */
1349 complain_overflow_signed, /* complain_on_overflow */
1350 bfd_elf_generic_reloc, /* special_function */
1351 "R_PPC_EMB_RELSDA", /* name */
1352 FALSE, /* partial_inplace */
1353 0, /* src_mask */
1354 0xffff, /* dst_mask */
1355 FALSE), /* pcrel_offset */
1356
1357 /* A 16 bit relative relocation. */
1358 HOWTO (R_PPC_REL16, /* type */
1359 0, /* rightshift */
1360 1, /* size (0 = byte, 1 = short, 2 = long) */
1361 16, /* bitsize */
1362 TRUE, /* pc_relative */
1363 0, /* bitpos */
1364 complain_overflow_bitfield, /* complain_on_overflow */
1365 bfd_elf_generic_reloc, /* special_function */
1366 "R_PPC_REL16", /* name */
1367 FALSE, /* partial_inplace */
1368 0, /* src_mask */
1369 0xffff, /* dst_mask */
1370 TRUE), /* pcrel_offset */
1371
1372 /* A 16 bit relative relocation without overflow. */
1373 HOWTO (R_PPC_REL16_LO, /* type */
1374 0, /* rightshift */
1375 1, /* size (0 = byte, 1 = short, 2 = long) */
1376 16, /* bitsize */
1377 TRUE, /* pc_relative */
1378 0, /* bitpos */
1379 complain_overflow_dont,/* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 "R_PPC_REL16_LO", /* name */
1382 FALSE, /* partial_inplace */
1383 0, /* src_mask */
1384 0xffff, /* dst_mask */
1385 TRUE), /* pcrel_offset */
1386
1387 /* The high order 16 bits of a relative address. */
1388 HOWTO (R_PPC_REL16_HI, /* type */
1389 16, /* rightshift */
1390 1, /* size (0 = byte, 1 = short, 2 = long) */
1391 16, /* bitsize */
1392 TRUE, /* pc_relative */
1393 0, /* bitpos */
1394 complain_overflow_dont, /* complain_on_overflow */
1395 bfd_elf_generic_reloc, /* special_function */
1396 "R_PPC_REL16_HI", /* name */
1397 FALSE, /* partial_inplace */
1398 0, /* src_mask */
1399 0xffff, /* dst_mask */
1400 TRUE), /* pcrel_offset */
1401
1402 /* The high order 16 bits of a relative address, plus 1 if the contents of
1403 the low 16 bits, treated as a signed number, is negative. */
1404 HOWTO (R_PPC_REL16_HA, /* type */
1405 16, /* rightshift */
1406 1, /* size (0 = byte, 1 = short, 2 = long) */
1407 16, /* bitsize */
1408 TRUE, /* pc_relative */
1409 0, /* bitpos */
1410 complain_overflow_dont, /* complain_on_overflow */
1411 ppc_elf_addr16_ha_reloc, /* special_function */
1412 "R_PPC_REL16_HA", /* name */
1413 FALSE, /* partial_inplace */
1414 0, /* src_mask */
1415 0xffff, /* dst_mask */
1416 TRUE), /* pcrel_offset */
1417
1418 /* GNU extension to record C++ vtable hierarchy. */
1419 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1420 0, /* rightshift */
1421 0, /* size (0 = byte, 1 = short, 2 = long) */
1422 0, /* bitsize */
1423 FALSE, /* pc_relative */
1424 0, /* bitpos */
1425 complain_overflow_dont, /* complain_on_overflow */
1426 NULL, /* special_function */
1427 "R_PPC_GNU_VTINHERIT", /* name */
1428 FALSE, /* partial_inplace */
1429 0, /* src_mask */
1430 0, /* dst_mask */
1431 FALSE), /* pcrel_offset */
1432
1433 /* GNU extension to record C++ vtable member usage. */
1434 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1435 0, /* rightshift */
1436 0, /* size (0 = byte, 1 = short, 2 = long) */
1437 0, /* bitsize */
1438 FALSE, /* pc_relative */
1439 0, /* bitpos */
1440 complain_overflow_dont, /* complain_on_overflow */
1441 NULL, /* special_function */
1442 "R_PPC_GNU_VTENTRY", /* name */
1443 FALSE, /* partial_inplace */
1444 0, /* src_mask */
1445 0, /* dst_mask */
1446 FALSE), /* pcrel_offset */
1447
1448 /* Phony reloc to handle AIX style TOC entries. */
1449 HOWTO (R_PPC_TOC16, /* type */
1450 0, /* rightshift */
1451 1, /* size (0 = byte, 1 = short, 2 = long) */
1452 16, /* bitsize */
1453 FALSE, /* pc_relative */
1454 0, /* bitpos */
1455 complain_overflow_signed, /* complain_on_overflow */
1456 bfd_elf_generic_reloc, /* special_function */
1457 "R_PPC_TOC16", /* name */
1458 FALSE, /* partial_inplace */
1459 0, /* src_mask */
1460 0xffff, /* dst_mask */
1461 FALSE), /* pcrel_offset */
1462 };
1463 \f
1464 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1465
1466 static void
1467 ppc_elf_howto_init (void)
1468 {
1469 unsigned int i, type;
1470
1471 for (i = 0;
1472 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1473 i++)
1474 {
1475 type = ppc_elf_howto_raw[i].type;
1476 if (type >= (sizeof (ppc_elf_howto_table)
1477 / sizeof (ppc_elf_howto_table[0])))
1478 abort ();
1479 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1480 }
1481 }
1482
1483 static reloc_howto_type *
1484 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1485 bfd_reloc_code_real_type code)
1486 {
1487 enum elf_ppc_reloc_type r;
1488
1489 /* Initialize howto table if not already done. */
1490 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1491 ppc_elf_howto_init ();
1492
1493 switch (code)
1494 {
1495 default:
1496 return NULL;
1497
1498 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1499 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1500 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1501 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1502 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1503 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1504 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1505 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1506 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1507 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1508 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1509 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1510 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1511 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1512 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1513 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1514 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1515 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1516 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1517 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1518 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1519 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1520 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1521 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1522 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1523 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1524 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1525 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1526 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1527 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1528 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1529 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1530 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1531 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1532 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1533 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1534 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1535 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1536 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1537 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1538 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1539 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1540 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1541 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1542 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1543 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1544 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1545 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1546 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1549 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1550 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1551 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1552 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1553 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1554 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1555 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1556 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1557 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1558 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1559 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1560 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1561 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1562 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1563 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1564 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1565 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1566 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1567 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1568 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1569 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1570 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1571 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1572 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1573 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1574 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1575 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1576 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1577 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1578 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1579 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1580 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1581 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1582 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1583 }
1584
1585 return ppc_elf_howto_table[r];
1586 };
1587
1588 static reloc_howto_type *
1589 ppc_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1590 const char *r_name)
1591 {
1592 unsigned int i;
1593
1594 for (i = 0;
1595 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1596 i++)
1597 if (ppc_elf_howto_raw[i].name != NULL
1598 && strcasecmp (ppc_elf_howto_raw[i].name, r_name) == 0)
1599 return &ppc_elf_howto_raw[i];
1600
1601 return NULL;
1602 }
1603
1604 /* Set the howto pointer for a PowerPC ELF reloc. */
1605
1606 static void
1607 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1608 arelent *cache_ptr,
1609 Elf_Internal_Rela *dst)
1610 {
1611 /* Initialize howto table if not already done. */
1612 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1613 ppc_elf_howto_init ();
1614
1615 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1616 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1617
1618 /* Just because the above assert didn't trigger doesn't mean that
1619 ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
1620 if (!cache_ptr->howto)
1621 {
1622 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
1623 abfd, ELF32_R_TYPE (dst->r_info));
1624 bfd_set_error (bfd_error_bad_value);
1625
1626 cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
1627 }
1628 }
1629
1630 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1631
1632 static bfd_reloc_status_type
1633 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1634 arelent *reloc_entry,
1635 asymbol *symbol,
1636 void *data ATTRIBUTE_UNUSED,
1637 asection *input_section,
1638 bfd *output_bfd,
1639 char **error_message ATTRIBUTE_UNUSED)
1640 {
1641 bfd_vma relocation;
1642
1643 if (output_bfd != NULL)
1644 {
1645 reloc_entry->address += input_section->output_offset;
1646 return bfd_reloc_ok;
1647 }
1648
1649 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1650 return bfd_reloc_outofrange;
1651
1652 if (bfd_is_com_section (symbol->section))
1653 relocation = 0;
1654 else
1655 relocation = symbol->value;
1656
1657 relocation += symbol->section->output_section->vma;
1658 relocation += symbol->section->output_offset;
1659 relocation += reloc_entry->addend;
1660 if (reloc_entry->howto->pc_relative)
1661 relocation -= reloc_entry->address;
1662
1663 reloc_entry->addend += (relocation & 0x8000) << 1;
1664
1665 return bfd_reloc_continue;
1666 }
1667
1668 static bfd_reloc_status_type
1669 ppc_elf_unhandled_reloc (bfd *abfd,
1670 arelent *reloc_entry,
1671 asymbol *symbol,
1672 void *data,
1673 asection *input_section,
1674 bfd *output_bfd,
1675 char **error_message)
1676 {
1677 /* If this is a relocatable link (output_bfd test tells us), just
1678 call the generic function. Any adjustment will be done at final
1679 link time. */
1680 if (output_bfd != NULL)
1681 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1682 input_section, output_bfd, error_message);
1683
1684 if (error_message != NULL)
1685 {
1686 static char buf[60];
1687 sprintf (buf, _("generic linker can't handle %s"),
1688 reloc_entry->howto->name);
1689 *error_message = buf;
1690 }
1691 return bfd_reloc_dangerous;
1692 }
1693 \f
1694 /* Sections created by the linker. */
1695
1696 typedef struct elf_linker_section
1697 {
1698 /* Pointer to the bfd section. */
1699 asection *section;
1700 /* Section name. */
1701 const char *name;
1702 /* Associated bss section name. */
1703 const char *bss_name;
1704 /* Associated symbol name. */
1705 const char *sym_name;
1706 /* Associated symbol. */
1707 struct elf_link_hash_entry *sym;
1708 } elf_linker_section_t;
1709
1710 /* Linked list of allocated pointer entries. This hangs off of the
1711 symbol lists, and provides allows us to return different pointers,
1712 based on different addend's. */
1713
1714 typedef struct elf_linker_section_pointers
1715 {
1716 /* next allocated pointer for this symbol */
1717 struct elf_linker_section_pointers *next;
1718 /* offset of pointer from beginning of section */
1719 bfd_vma offset;
1720 /* addend used */
1721 bfd_vma addend;
1722 /* which linker section this is */
1723 elf_linker_section_t *lsect;
1724 } elf_linker_section_pointers_t;
1725
1726 struct ppc_elf_obj_tdata
1727 {
1728 struct elf_obj_tdata elf;
1729
1730 /* A mapping from local symbols to offsets into the various linker
1731 sections added. This is index by the symbol index. */
1732 elf_linker_section_pointers_t **linker_section_pointers;
1733
1734 /* Flags used to auto-detect plt type. */
1735 unsigned int makes_plt_call : 1;
1736 unsigned int has_rel16 : 1;
1737 };
1738
1739 #define ppc_elf_tdata(bfd) \
1740 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1741
1742 #define elf_local_ptr_offsets(bfd) \
1743 (ppc_elf_tdata (bfd)->linker_section_pointers)
1744
1745 #define is_ppc_elf(bfd) \
1746 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1747 && elf_object_id (bfd) == PPC32_ELF_TDATA)
1748
1749 /* Override the generic function because we store some extras. */
1750
1751 static bfd_boolean
1752 ppc_elf_mkobject (bfd *abfd)
1753 {
1754 return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
1755 PPC32_ELF_TDATA);
1756 }
1757
1758 /* Fix bad default arch selected for a 32 bit input bfd when the
1759 default is 64 bit. */
1760
1761 static bfd_boolean
1762 ppc_elf_object_p (bfd *abfd)
1763 {
1764 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1765 {
1766 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1767
1768 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1769 {
1770 /* Relies on arch after 64 bit default being 32 bit default. */
1771 abfd->arch_info = abfd->arch_info->next;
1772 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1773 }
1774 }
1775 return TRUE;
1776 }
1777
1778 /* Function to set whether a module needs the -mrelocatable bit set. */
1779
1780 static bfd_boolean
1781 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1782 {
1783 BFD_ASSERT (!elf_flags_init (abfd)
1784 || elf_elfheader (abfd)->e_flags == flags);
1785
1786 elf_elfheader (abfd)->e_flags = flags;
1787 elf_flags_init (abfd) = TRUE;
1788 return TRUE;
1789 }
1790
1791 /* Support for core dump NOTE sections. */
1792
1793 static bfd_boolean
1794 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1795 {
1796 int offset;
1797 unsigned int size;
1798
1799 switch (note->descsz)
1800 {
1801 default:
1802 return FALSE;
1803
1804 case 268: /* Linux/PPC. */
1805 /* pr_cursig */
1806 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1807
1808 /* pr_pid */
1809 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1810
1811 /* pr_reg */
1812 offset = 72;
1813 size = 192;
1814
1815 break;
1816 }
1817
1818 /* Make a ".reg/999" section. */
1819 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1820 size, note->descpos + offset);
1821 }
1822
1823 static bfd_boolean
1824 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1825 {
1826 switch (note->descsz)
1827 {
1828 default:
1829 return FALSE;
1830
1831 case 128: /* Linux/PPC elf_prpsinfo. */
1832 elf_tdata (abfd)->core_program
1833 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1834 elf_tdata (abfd)->core_command
1835 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1836 }
1837
1838 /* Note that for some reason, a spurious space is tacked
1839 onto the end of the args in some (at least one anyway)
1840 implementations, so strip it off if it exists. */
1841
1842 {
1843 char *command = elf_tdata (abfd)->core_command;
1844 int n = strlen (command);
1845
1846 if (0 < n && command[n - 1] == ' ')
1847 command[n - 1] = '\0';
1848 }
1849
1850 return TRUE;
1851 }
1852
1853 static char *
1854 ppc_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_type, ...)
1855 {
1856 switch (note_type)
1857 {
1858 default:
1859 return NULL;
1860
1861 case NT_PRPSINFO:
1862 {
1863 char data[128];
1864 va_list ap;
1865
1866 va_start (ap, note_type);
1867 memset (data, 0, 32);
1868 strncpy (data + 32, va_arg (ap, const char *), 16);
1869 strncpy (data + 48, va_arg (ap, const char *), 80);
1870 va_end (ap);
1871 return elfcore_write_note (abfd, buf, bufsiz,
1872 "CORE", note_type, data, sizeof (data));
1873 }
1874
1875 case NT_PRSTATUS:
1876 {
1877 char data[268];
1878 va_list ap;
1879 long pid;
1880 int cursig;
1881 const void *greg;
1882
1883 va_start (ap, note_type);
1884 memset (data, 0, 72);
1885 pid = va_arg (ap, long);
1886 bfd_put_32 (abfd, pid, data + 24);
1887 cursig = va_arg (ap, int);
1888 bfd_put_16 (abfd, cursig, data + 12);
1889 greg = va_arg (ap, const void *);
1890 memcpy (data + 72, greg, 192);
1891 memset (data + 264, 0, 4);
1892 va_end (ap);
1893 return elfcore_write_note (abfd, buf, bufsiz,
1894 "CORE", note_type, data, sizeof (data));
1895 }
1896 }
1897 }
1898
1899 /* Return address for Ith PLT stub in section PLT, for relocation REL
1900 or (bfd_vma) -1 if it should not be included. */
1901
1902 static bfd_vma
1903 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1904 const asection *plt ATTRIBUTE_UNUSED,
1905 const arelent *rel)
1906 {
1907 return rel->address;
1908 }
1909
1910 /* Handle a PowerPC specific section when reading an object file. This
1911 is called when bfd_section_from_shdr finds a section with an unknown
1912 type. */
1913
1914 static bfd_boolean
1915 ppc_elf_section_from_shdr (bfd *abfd,
1916 Elf_Internal_Shdr *hdr,
1917 const char *name,
1918 int shindex)
1919 {
1920 asection *newsect;
1921 flagword flags;
1922
1923 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1924 return FALSE;
1925
1926 newsect = hdr->bfd_section;
1927 flags = bfd_get_section_flags (abfd, newsect);
1928 if (hdr->sh_flags & SHF_EXCLUDE)
1929 flags |= SEC_EXCLUDE;
1930
1931 if (hdr->sh_type == SHT_ORDERED)
1932 flags |= SEC_SORT_ENTRIES;
1933
1934 bfd_set_section_flags (abfd, newsect, flags);
1935 return TRUE;
1936 }
1937
1938 /* Set up any other section flags and such that may be necessary. */
1939
1940 static bfd_boolean
1941 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1942 Elf_Internal_Shdr *shdr,
1943 asection *asect)
1944 {
1945 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1946 shdr->sh_flags |= SHF_EXCLUDE;
1947
1948 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1949 shdr->sh_type = SHT_ORDERED;
1950
1951 return TRUE;
1952 }
1953
1954 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1955 need to bump up the number of section headers. */
1956
1957 static int
1958 ppc_elf_additional_program_headers (bfd *abfd,
1959 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1960 {
1961 asection *s;
1962 int ret = 0;
1963
1964 s = bfd_get_section_by_name (abfd, ".sbss2");
1965 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1966 ++ret;
1967
1968 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1969 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1970 ++ret;
1971
1972 return ret;
1973 }
1974
1975 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1976 .PPC.EMB.sbss0 a normal section, and not a bss section so
1977 that the linker doesn't crater when trying to make more than
1978 2 sections. */
1979
1980 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1981 {
1982 { STRING_COMMA_LEN (".plt"), 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1983 { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1984 { STRING_COMMA_LEN (".sbss2"), -2, SHT_PROGBITS, SHF_ALLOC },
1985 { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1986 { STRING_COMMA_LEN (".sdata2"), -2, SHT_PROGBITS, SHF_ALLOC },
1987 { STRING_COMMA_LEN (".tags"), 0, SHT_ORDERED, SHF_ALLOC },
1988 { STRING_COMMA_LEN (".PPC.EMB.apuinfo"), 0, SHT_NOTE, 0 },
1989 { STRING_COMMA_LEN (".PPC.EMB.sbss0"), 0, SHT_PROGBITS, SHF_ALLOC },
1990 { STRING_COMMA_LEN (".PPC.EMB.sdata0"), 0, SHT_PROGBITS, SHF_ALLOC },
1991 { NULL, 0, 0, 0, 0 }
1992 };
1993
1994 /* This is what we want for new plt/got. */
1995 static struct bfd_elf_special_section ppc_alt_plt =
1996 { STRING_COMMA_LEN (".plt"), 0, SHT_PROGBITS, SHF_ALLOC };
1997
1998 static const struct bfd_elf_special_section *
1999 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
2000 {
2001 const struct bfd_elf_special_section *ssect;
2002
2003 /* See if this is one of the special sections. */
2004 if (sec->name == NULL)
2005 return NULL;
2006
2007 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
2008 sec->use_rela_p);
2009 if (ssect != NULL)
2010 {
2011 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
2012 ssect = &ppc_alt_plt;
2013 return ssect;
2014 }
2015
2016 return _bfd_elf_get_sec_type_attr (abfd, sec);
2017 }
2018 \f
2019 /* Very simple linked list structure for recording apuinfo values. */
2020 typedef struct apuinfo_list
2021 {
2022 struct apuinfo_list *next;
2023 unsigned long value;
2024 }
2025 apuinfo_list;
2026
2027 static apuinfo_list *head;
2028
2029
2030 static void
2031 apuinfo_list_init (void)
2032 {
2033 head = NULL;
2034 }
2035
2036 static void
2037 apuinfo_list_add (unsigned long value)
2038 {
2039 apuinfo_list *entry = head;
2040
2041 while (entry != NULL)
2042 {
2043 if (entry->value == value)
2044 return;
2045 entry = entry->next;
2046 }
2047
2048 entry = bfd_malloc (sizeof (* entry));
2049 if (entry == NULL)
2050 return;
2051
2052 entry->value = value;
2053 entry->next = head;
2054 head = entry;
2055 }
2056
2057 static unsigned
2058 apuinfo_list_length (void)
2059 {
2060 apuinfo_list *entry;
2061 unsigned long count;
2062
2063 for (entry = head, count = 0;
2064 entry;
2065 entry = entry->next)
2066 ++ count;
2067
2068 return count;
2069 }
2070
2071 static inline unsigned long
2072 apuinfo_list_element (unsigned long number)
2073 {
2074 apuinfo_list * entry;
2075
2076 for (entry = head;
2077 entry && number --;
2078 entry = entry->next)
2079 ;
2080
2081 return entry ? entry->value : 0;
2082 }
2083
2084 static void
2085 apuinfo_list_finish (void)
2086 {
2087 apuinfo_list *entry;
2088
2089 for (entry = head; entry;)
2090 {
2091 apuinfo_list *next = entry->next;
2092 free (entry);
2093 entry = next;
2094 }
2095
2096 head = NULL;
2097 }
2098
2099 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2100 #define APUINFO_LABEL "APUinfo"
2101
2102 /* Scan the input BFDs and create a linked list of
2103 the APUinfo values that will need to be emitted. */
2104
2105 static void
2106 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2107 {
2108 bfd *ibfd;
2109 asection *asec;
2110 char *buffer;
2111 unsigned num_input_sections;
2112 bfd_size_type output_section_size;
2113 unsigned i;
2114 unsigned num_entries;
2115 unsigned long offset;
2116 unsigned long length;
2117 const char *error_message = NULL;
2118
2119 if (link_info == NULL)
2120 return;
2121
2122 /* Scan the input bfds, looking for apuinfo sections. */
2123 num_input_sections = 0;
2124 output_section_size = 0;
2125
2126 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2127 {
2128 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2129 if (asec)
2130 {
2131 ++ num_input_sections;
2132 output_section_size += asec->size;
2133 }
2134 }
2135
2136 /* We need at least one input sections
2137 in order to make merging worthwhile. */
2138 if (num_input_sections < 1)
2139 return;
2140
2141 /* Just make sure that the output section exists as well. */
2142 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2143 if (asec == NULL)
2144 return;
2145
2146 /* Allocate a buffer for the contents of the input sections. */
2147 buffer = bfd_malloc (output_section_size);
2148 if (buffer == NULL)
2149 return;
2150
2151 offset = 0;
2152 apuinfo_list_init ();
2153
2154 /* Read in the input sections contents. */
2155 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2156 {
2157 unsigned long datum;
2158 char *ptr;
2159
2160 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2161 if (asec == NULL)
2162 continue;
2163
2164 length = asec->size;
2165 if (length < 24)
2166 {
2167 error_message = _("corrupt or empty %s section in %B");
2168 goto fail;
2169 }
2170
2171 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2172 || (bfd_bread (buffer + offset, length, ibfd) != length))
2173 {
2174 error_message = _("unable to read in %s section from %B");
2175 goto fail;
2176 }
2177
2178 /* Process the contents of the section. */
2179 ptr = buffer + offset;
2180 error_message = _("corrupt %s section in %B");
2181
2182 /* Verify the contents of the header. Note - we have to
2183 extract the values this way in order to allow for a
2184 host whose endian-ness is different from the target. */
2185 datum = bfd_get_32 (ibfd, ptr);
2186 if (datum != sizeof APUINFO_LABEL)
2187 goto fail;
2188
2189 datum = bfd_get_32 (ibfd, ptr + 8);
2190 if (datum != 0x2)
2191 goto fail;
2192
2193 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2194 goto fail;
2195
2196 /* Get the number of bytes used for apuinfo entries. */
2197 datum = bfd_get_32 (ibfd, ptr + 4);
2198 if (datum + 20 != length)
2199 goto fail;
2200
2201 /* Make sure that we do not run off the end of the section. */
2202 if (offset + length > output_section_size)
2203 goto fail;
2204
2205 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2206 for (i = 0; i < datum; i += 4)
2207 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2208
2209 /* Update the offset. */
2210 offset += length;
2211 }
2212
2213 error_message = NULL;
2214
2215 /* Compute the size of the output section. */
2216 num_entries = apuinfo_list_length ();
2217 output_section_size = 20 + num_entries * 4;
2218
2219 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2220
2221 if (! bfd_set_section_size (abfd, asec, output_section_size))
2222 ibfd = abfd,
2223 error_message = _("warning: unable to set size of %s section in %B");
2224
2225 fail:
2226 free (buffer);
2227
2228 if (error_message)
2229 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2230 }
2231
2232 /* Prevent the output section from accumulating the input sections'
2233 contents. We have already stored this in our linked list structure. */
2234
2235 static bfd_boolean
2236 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2237 struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
2238 asection *asec,
2239 bfd_byte *contents ATTRIBUTE_UNUSED)
2240 {
2241 return (apuinfo_list_length ()
2242 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2243 }
2244
2245 /* Finally we can generate the output section. */
2246
2247 static void
2248 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2249 {
2250 bfd_byte *buffer;
2251 asection *asec;
2252 unsigned i;
2253 unsigned num_entries;
2254 bfd_size_type length;
2255
2256 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2257 if (asec == NULL)
2258 return;
2259
2260 if (apuinfo_list_length () == 0)
2261 return;
2262
2263 length = asec->size;
2264 if (length < 20)
2265 return;
2266
2267 buffer = bfd_malloc (length);
2268 if (buffer == NULL)
2269 {
2270 (*_bfd_error_handler)
2271 (_("failed to allocate space for new APUinfo section."));
2272 return;
2273 }
2274
2275 /* Create the apuinfo header. */
2276 num_entries = apuinfo_list_length ();
2277 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2278 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2279 bfd_put_32 (abfd, 0x2, buffer + 8);
2280 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2281
2282 length = 20;
2283 for (i = 0; i < num_entries; i++)
2284 {
2285 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2286 length += 4;
2287 }
2288
2289 if (length != asec->size)
2290 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2291
2292 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2293 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2294
2295 free (buffer);
2296
2297 apuinfo_list_finish ();
2298 }
2299 \f
2300 static bfd_boolean
2301 is_pic_glink_stub (bfd *abfd, asection *glink, bfd_vma off)
2302 {
2303 bfd_byte buf[16];
2304 unsigned int insn;
2305
2306 if (!bfd_get_section_contents (abfd, glink, buf, off, 16))
2307 return FALSE;
2308
2309 insn = bfd_get_32 (abfd, buf);
2310 if ((insn & 0xffff0000) == LWZ_11_30
2311 && bfd_get_32 (abfd, buf + 4) == MTCTR_11
2312 && bfd_get_32 (abfd, buf + 8) == BCTR)
2313 return TRUE;
2314
2315 if ((insn & 0xffff0000) == ADDIS_11_30
2316 && (bfd_get_32 (abfd, buf + 4) & 0xffff0000) == LWZ_11_11
2317 && bfd_get_32 (abfd, buf + 8) == MTCTR_11
2318 && bfd_get_32 (abfd, buf + 12) == BCTR)
2319 return TRUE;
2320 return FALSE;
2321 }
2322
2323 static bfd_boolean
2324 section_covers_vma (bfd *abfd ATTRIBUTE_UNUSED, asection *section, void *ptr)
2325 {
2326 bfd_vma vma = *(bfd_vma *) ptr;
2327 return ((section->flags & SEC_ALLOC) != 0
2328 && section->vma <= vma
2329 && vma < section->vma + section->size);
2330 }
2331
2332 static long
2333 ppc_elf_get_synthetic_symtab (bfd *abfd, long symcount, asymbol **syms,
2334 long dynsymcount, asymbol **dynsyms,
2335 asymbol **ret)
2336 {
2337 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
2338 asection *plt, *relplt, *dynamic, *glink;
2339 bfd_vma glink_vma = 0;
2340 bfd_vma resolv_vma = 0;
2341 bfd_vma stub_vma;
2342 asymbol *s;
2343 arelent *p;
2344 long count, i;
2345 size_t size;
2346 char *names;
2347 bfd_byte buf[4];
2348
2349 *ret = NULL;
2350
2351 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
2352 return 0;
2353
2354 if (dynsymcount <= 0)
2355 return 0;
2356
2357 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2358 if (relplt == NULL)
2359 return 0;
2360
2361 plt = bfd_get_section_by_name (abfd, ".plt");
2362 if (plt == NULL)
2363 return 0;
2364
2365 /* Call common code to handle old-style executable PLTs. */
2366 if (elf_section_flags (plt) & SHF_EXECINSTR)
2367 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
2368 dynsymcount, dynsyms, ret);
2369
2370 /* If this object was prelinked, the prelinker stored the address
2371 of .glink at got[1]. If it wasn't prelinked, got[1] will be zero. */
2372 dynamic = bfd_get_section_by_name (abfd, ".dynamic");
2373 if (dynamic != NULL)
2374 {
2375 bfd_byte *dynbuf, *extdyn, *extdynend;
2376 size_t extdynsize;
2377 void (*swap_dyn_in) (bfd *, const void *, Elf_Internal_Dyn *);
2378
2379 if (!bfd_malloc_and_get_section (abfd, dynamic, &dynbuf))
2380 return -1;
2381
2382 extdynsize = get_elf_backend_data (abfd)->s->sizeof_dyn;
2383 swap_dyn_in = get_elf_backend_data (abfd)->s->swap_dyn_in;
2384
2385 extdyn = dynbuf;
2386 extdynend = extdyn + dynamic->size;
2387 for (; extdyn < extdynend; extdyn += extdynsize)
2388 {
2389 Elf_Internal_Dyn dyn;
2390 (*swap_dyn_in) (abfd, extdyn, &dyn);
2391
2392 if (dyn.d_tag == DT_NULL)
2393 break;
2394
2395 if (dyn.d_tag == DT_PPC_GOT)
2396 {
2397 unsigned int g_o_t = dyn.d_un.d_val;
2398 asection *got = bfd_get_section_by_name (abfd, ".got");
2399 if (got != NULL
2400 && bfd_get_section_contents (abfd, got, buf,
2401 g_o_t - got->vma + 4, 4))
2402 glink_vma = bfd_get_32 (abfd, buf);
2403 break;
2404 }
2405 }
2406 free (dynbuf);
2407 }
2408
2409 /* Otherwise we read the first plt entry. */
2410 if (glink_vma == 0)
2411 {
2412 if (bfd_get_section_contents (abfd, plt, buf, 0, 4))
2413 glink_vma = bfd_get_32 (abfd, buf);
2414 }
2415
2416 if (glink_vma == 0)
2417 return 0;
2418
2419 /* The .glink section usually does not survive the final
2420 link; search for the section (usually .text) where the
2421 glink stubs now reside. */
2422 glink = bfd_sections_find_if (abfd, section_covers_vma, &glink_vma);
2423 if (glink == NULL)
2424 return 0;
2425
2426 /* Determine glink PLT resolver by reading the relative branch
2427 from the first glink stub. */
2428 if (bfd_get_section_contents (abfd, glink, buf,
2429 glink_vma - glink->vma, 4))
2430 {
2431 unsigned int insn = bfd_get_32 (abfd, buf);
2432
2433 /* The first glink stub may either branch to the resolver ... */
2434 insn ^= B;
2435 if ((insn & ~0x3fffffc) == 0)
2436 resolv_vma = glink_vma + (insn ^ 0x2000000) - 0x2000000;
2437
2438 /* ... or fall through a bunch of NOPs. */
2439 else if ((insn ^ B ^ NOP) == 0)
2440 for (i = 4;
2441 bfd_get_section_contents (abfd, glink, buf,
2442 glink_vma - glink->vma + i, 4);
2443 i += 4)
2444 if (bfd_get_32 (abfd, buf) != NOP)
2445 {
2446 resolv_vma = glink_vma + i;
2447 break;
2448 }
2449 }
2450
2451 count = relplt->size / sizeof (Elf32_External_Rela);
2452 stub_vma = glink_vma - (bfd_vma) count * 16;
2453 /* If the stubs are those for -shared/-pie then we might have
2454 multiple stubs for each plt entry. If that is the case then
2455 there is no way to associate stubs with their plt entries short
2456 of figuring out the GOT pointer value used in the stub. */
2457 if (!bfd_get_section_contents (abfd, glink, buf,
2458 stub_vma - glink->vma, 4)
2459 || ((bfd_get_32 (abfd, buf) & 0xffff0000) != LIS_11
2460 && is_pic_glink_stub (abfd, glink, stub_vma - glink->vma - 16)))
2461 return 0;
2462
2463 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
2464 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
2465 return -1;
2466
2467 size = count * sizeof (asymbol);
2468 p = relplt->relocation;
2469 for (i = 0; i < count; i++, p++)
2470 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
2471
2472 size += sizeof (asymbol) + sizeof ("__glink");
2473
2474 if (resolv_vma)
2475 size += sizeof (asymbol) + sizeof ("__glink_PLTresolve");
2476
2477 s = *ret = bfd_malloc (size);
2478 if (s == NULL)
2479 return -1;
2480
2481 names = (char *) (s + count + 1 + (resolv_vma != 0));
2482 p = relplt->relocation;
2483 for (i = 0; i < count; i++, p++)
2484 {
2485 size_t len;
2486
2487 *s = **p->sym_ptr_ptr;
2488 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
2489 we are defining a symbol, ensure one of them is set. */
2490 if ((s->flags & BSF_LOCAL) == 0)
2491 s->flags |= BSF_GLOBAL;
2492 s->flags |= BSF_SYNTHETIC;
2493 s->section = glink;
2494 s->value = stub_vma - glink->vma;
2495 s->name = names;
2496 s->udata.p = NULL;
2497 len = strlen ((*p->sym_ptr_ptr)->name);
2498 memcpy (names, (*p->sym_ptr_ptr)->name, len);
2499 names += len;
2500 memcpy (names, "@plt", sizeof ("@plt"));
2501 names += sizeof ("@plt");
2502 ++s;
2503 stub_vma += 16;
2504 }
2505
2506 /* Add a symbol at the start of the glink branch table. */
2507 memset (s, 0, sizeof *s);
2508 s->the_bfd = abfd;
2509 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2510 s->section = glink;
2511 s->value = glink_vma - glink->vma;
2512 s->name = names;
2513 memcpy (names, "__glink", sizeof ("__glink"));
2514 names += sizeof ("__glink");
2515 s++;
2516 count++;
2517
2518 if (resolv_vma)
2519 {
2520 /* Add a symbol for the glink PLT resolver. */
2521 memset (s, 0, sizeof *s);
2522 s->the_bfd = abfd;
2523 s->flags = BSF_GLOBAL | BSF_SYNTHETIC;
2524 s->section = glink;
2525 s->value = resolv_vma - glink->vma;
2526 s->name = names;
2527 memcpy (names, "__glink_PLTresolve", sizeof ("__glink_PLTresolve"));
2528 names += sizeof ("__glink_PLTresolve");
2529 s++;
2530 count++;
2531 }
2532
2533 return count;
2534 }
2535 \f
2536 /* The following functions are specific to the ELF linker, while
2537 functions above are used generally. They appear in this file more
2538 or less in the order in which they are called. eg.
2539 ppc_elf_check_relocs is called early in the link process,
2540 ppc_elf_finish_dynamic_sections is one of the last functions
2541 called. */
2542
2543 /* The PPC linker needs to keep track of the number of relocs that it
2544 decides to copy as dynamic relocs in check_relocs for each symbol.
2545 This is so that it can later discard them if they are found to be
2546 unnecessary. We store the information in a field extending the
2547 regular ELF linker hash table. */
2548
2549 struct ppc_elf_dyn_relocs
2550 {
2551 struct ppc_elf_dyn_relocs *next;
2552
2553 /* The input section of the reloc. */
2554 asection *sec;
2555
2556 /* Total number of relocs copied for the input section. */
2557 bfd_size_type count;
2558
2559 /* Number of pc-relative relocs copied for the input section. */
2560 bfd_size_type pc_count;
2561 };
2562
2563 /* Track PLT entries needed for a given symbol. We might need more
2564 than one glink entry per symbol. */
2565 struct plt_entry
2566 {
2567 struct plt_entry *next;
2568
2569 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2570 This field stores the offset into .got2 used to initialise the
2571 GOT pointer reg. It will always be at least 32768 (and for
2572 current gcc this is the only offset used). */
2573 bfd_vma addend;
2574
2575 /* The .got2 section. */
2576 asection *sec;
2577
2578 /* PLT refcount or offset. */
2579 union
2580 {
2581 bfd_signed_vma refcount;
2582 bfd_vma offset;
2583 } plt;
2584
2585 /* .glink stub offset. */
2586 bfd_vma glink_offset;
2587 };
2588
2589 /* Of those relocs that might be copied as dynamic relocs, this function
2590 selects those that must be copied when linking a shared library,
2591 even when the symbol is local. */
2592
2593 static int
2594 must_be_dyn_reloc (struct bfd_link_info *info,
2595 enum elf_ppc_reloc_type r_type)
2596 {
2597 switch (r_type)
2598 {
2599 default:
2600 return 1;
2601
2602 case R_PPC_REL24:
2603 case R_PPC_REL14:
2604 case R_PPC_REL14_BRTAKEN:
2605 case R_PPC_REL14_BRNTAKEN:
2606 case R_PPC_REL32:
2607 return 0;
2608
2609 case R_PPC_TPREL32:
2610 case R_PPC_TPREL16:
2611 case R_PPC_TPREL16_LO:
2612 case R_PPC_TPREL16_HI:
2613 case R_PPC_TPREL16_HA:
2614 return !info->executable;
2615 }
2616 }
2617
2618 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2619 copying dynamic variables from a shared lib into an app's dynbss
2620 section, and instead use a dynamic relocation to point into the
2621 shared lib. */
2622 #define ELIMINATE_COPY_RELOCS 1
2623
2624 /* PPC ELF linker hash entry. */
2625
2626 struct ppc_elf_link_hash_entry
2627 {
2628 struct elf_link_hash_entry elf;
2629
2630 /* If this symbol is used in the linker created sections, the processor
2631 specific backend uses this field to map the field into the offset
2632 from the beginning of the section. */
2633 elf_linker_section_pointers_t *linker_section_pointer;
2634
2635 /* Track dynamic relocs copied for this symbol. */
2636 struct ppc_elf_dyn_relocs *dyn_relocs;
2637
2638 /* Contexts in which symbol is used in the GOT (or TOC).
2639 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2640 corresponding relocs are encountered during check_relocs.
2641 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2642 indicate the corresponding GOT entry type is not needed. */
2643 #define TLS_GD 1 /* GD reloc. */
2644 #define TLS_LD 2 /* LD reloc. */
2645 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2646 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2647 #define TLS_TLS 16 /* Any TLS reloc. */
2648 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2649 char tls_mask;
2650
2651 /* Nonzero if we have seen a small data relocation referring to this
2652 symbol. */
2653 unsigned char has_sda_refs;
2654 };
2655
2656 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2657
2658 /* PPC ELF linker hash table. */
2659
2660 struct ppc_elf_link_hash_table
2661 {
2662 struct elf_link_hash_table elf;
2663
2664 /* Short-cuts to get to dynamic linker sections. */
2665 asection *got;
2666 asection *relgot;
2667 asection *glink;
2668 asection *plt;
2669 asection *relplt;
2670 asection *dynbss;
2671 asection *relbss;
2672 asection *dynsbss;
2673 asection *relsbss;
2674 elf_linker_section_t sdata[2];
2675 asection *sbss;
2676
2677 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2678 asection *srelplt2;
2679
2680 /* The .got.plt section (VxWorks only)*/
2681 asection *sgotplt;
2682
2683 /* Shortcut to __tls_get_addr. */
2684 struct elf_link_hash_entry *tls_get_addr;
2685
2686 /* The bfd that forced an old-style PLT. */
2687 bfd *old_bfd;
2688
2689 /* TLS local dynamic got entry handling. */
2690 union {
2691 bfd_signed_vma refcount;
2692 bfd_vma offset;
2693 } tlsld_got;
2694
2695 /* Offset of PltResolve function in glink. */
2696 bfd_vma glink_pltresolve;
2697
2698 /* Size of reserved GOT entries. */
2699 unsigned int got_header_size;
2700 /* Non-zero if allocating the header left a gap. */
2701 unsigned int got_gap;
2702
2703 /* The type of PLT we have chosen to use. */
2704 enum ppc_elf_plt_type plt_type;
2705
2706 /* Set if we should emit symbols for stubs. */
2707 unsigned int emit_stub_syms:1;
2708
2709 /* True if the target system is VxWorks. */
2710 unsigned int is_vxworks:1;
2711
2712 /* The size of PLT entries. */
2713 int plt_entry_size;
2714 /* The distance between adjacent PLT slots. */
2715 int plt_slot_size;
2716 /* The size of the first PLT entry. */
2717 int plt_initial_entry_size;
2718
2719 /* Small local sym to section mapping cache. */
2720 struct sym_sec_cache sym_sec;
2721 };
2722
2723 /* Get the PPC ELF linker hash table from a link_info structure. */
2724
2725 #define ppc_elf_hash_table(p) \
2726 ((struct ppc_elf_link_hash_table *) (p)->hash)
2727
2728 /* Create an entry in a PPC ELF linker hash table. */
2729
2730 static struct bfd_hash_entry *
2731 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2732 struct bfd_hash_table *table,
2733 const char *string)
2734 {
2735 /* Allocate the structure if it has not already been allocated by a
2736 subclass. */
2737 if (entry == NULL)
2738 {
2739 entry = bfd_hash_allocate (table,
2740 sizeof (struct ppc_elf_link_hash_entry));
2741 if (entry == NULL)
2742 return entry;
2743 }
2744
2745 /* Call the allocation method of the superclass. */
2746 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2747 if (entry != NULL)
2748 {
2749 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2750 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2751 ppc_elf_hash_entry (entry)->tls_mask = 0;
2752 }
2753
2754 return entry;
2755 }
2756
2757 /* Create a PPC ELF linker hash table. */
2758
2759 static struct bfd_link_hash_table *
2760 ppc_elf_link_hash_table_create (bfd *abfd)
2761 {
2762 struct ppc_elf_link_hash_table *ret;
2763
2764 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2765 if (ret == NULL)
2766 return NULL;
2767
2768 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
2769 ppc_elf_link_hash_newfunc,
2770 sizeof (struct ppc_elf_link_hash_entry)))
2771 {
2772 free (ret);
2773 return NULL;
2774 }
2775
2776 ret->elf.init_plt_refcount.refcount = 0;
2777 ret->elf.init_plt_refcount.glist = NULL;
2778 ret->elf.init_plt_offset.offset = 0;
2779 ret->elf.init_plt_offset.glist = NULL;
2780
2781 ret->sdata[0].name = ".sdata";
2782 ret->sdata[0].sym_name = "_SDA_BASE_";
2783 ret->sdata[0].bss_name = ".sbss";
2784
2785 ret->sdata[1].name = ".sdata2";
2786 ret->sdata[1].sym_name = "_SDA2_BASE_";
2787 ret->sdata[1].bss_name = ".sbss2";
2788
2789 ret->plt_entry_size = 12;
2790 ret->plt_slot_size = 8;
2791 ret->plt_initial_entry_size = 72;
2792
2793 return &ret->elf.root;
2794 }
2795
2796 /* Create .got and the related sections. */
2797
2798 static bfd_boolean
2799 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2800 {
2801 struct ppc_elf_link_hash_table *htab;
2802 asection *s;
2803 flagword flags;
2804
2805 if (!_bfd_elf_create_got_section (abfd, info))
2806 return FALSE;
2807
2808 htab = ppc_elf_hash_table (info);
2809 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2810 if (s == NULL)
2811 abort ();
2812
2813 if (htab->is_vxworks)
2814 {
2815 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2816 if (!htab->sgotplt)
2817 abort ();
2818 }
2819 else
2820 {
2821 /* The powerpc .got has a blrl instruction in it. Mark it
2822 executable. */
2823 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2824 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2825 if (!bfd_set_section_flags (abfd, s, flags))
2826 return FALSE;
2827 }
2828
2829 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2830 | SEC_LINKER_CREATED | SEC_READONLY);
2831 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2832 if (!htab->relgot
2833 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2834 return FALSE;
2835
2836 return TRUE;
2837 }
2838
2839 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2840 to output sections (just like _bfd_elf_create_dynamic_sections has
2841 to create .dynbss and .rela.bss). */
2842
2843 static bfd_boolean
2844 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2845 {
2846 struct ppc_elf_link_hash_table *htab;
2847 asection *s;
2848 flagword flags;
2849
2850 htab = ppc_elf_hash_table (info);
2851
2852 if (htab->got == NULL
2853 && !ppc_elf_create_got (abfd, info))
2854 return FALSE;
2855
2856 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2857 return FALSE;
2858
2859 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2860 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2861
2862 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2863 htab->glink = s;
2864 if (s == NULL
2865 || !bfd_set_section_alignment (abfd, s, 4))
2866 return FALSE;
2867
2868 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2869 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2870 SEC_ALLOC | SEC_LINKER_CREATED);
2871 htab->dynsbss = s;
2872 if (s == NULL)
2873 return FALSE;
2874
2875 if (! info->shared)
2876 {
2877 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2878 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2879 htab->relsbss = s;
2880 if (s == NULL
2881 || ! bfd_set_section_alignment (abfd, s, 2))
2882 return FALSE;
2883 }
2884
2885 if (htab->is_vxworks
2886 && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
2887 return FALSE;
2888
2889 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2890 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2891 if (s == NULL)
2892 abort ();
2893
2894 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2895 if (htab->plt_type == PLT_VXWORKS)
2896 /* The VxWorks PLT is a loaded section with contents. */
2897 flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
2898 return bfd_set_section_flags (abfd, s, flags);
2899 }
2900
2901 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2902
2903 static void
2904 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2905 struct elf_link_hash_entry *dir,
2906 struct elf_link_hash_entry *ind)
2907 {
2908 struct ppc_elf_link_hash_entry *edir, *eind;
2909
2910 edir = (struct ppc_elf_link_hash_entry *) dir;
2911 eind = (struct ppc_elf_link_hash_entry *) ind;
2912
2913 if (eind->dyn_relocs != NULL)
2914 {
2915 if (edir->dyn_relocs != NULL)
2916 {
2917 struct ppc_elf_dyn_relocs **pp;
2918 struct ppc_elf_dyn_relocs *p;
2919
2920 /* Add reloc counts against the indirect sym to the direct sym
2921 list. Merge any entries against the same section. */
2922 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2923 {
2924 struct ppc_elf_dyn_relocs *q;
2925
2926 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2927 if (q->sec == p->sec)
2928 {
2929 q->pc_count += p->pc_count;
2930 q->count += p->count;
2931 *pp = p->next;
2932 break;
2933 }
2934 if (q == NULL)
2935 pp = &p->next;
2936 }
2937 *pp = edir->dyn_relocs;
2938 }
2939
2940 edir->dyn_relocs = eind->dyn_relocs;
2941 eind->dyn_relocs = NULL;
2942 }
2943
2944 edir->tls_mask |= eind->tls_mask;
2945 edir->has_sda_refs |= eind->has_sda_refs;
2946
2947 /* If called to transfer flags for a weakdef during processing
2948 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2949 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2950 if (!(ELIMINATE_COPY_RELOCS
2951 && eind->elf.root.type != bfd_link_hash_indirect
2952 && edir->elf.dynamic_adjusted))
2953 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2954
2955 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2956 edir->elf.ref_regular |= eind->elf.ref_regular;
2957 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2958 edir->elf.needs_plt |= eind->elf.needs_plt;
2959 edir->elf.pointer_equality_needed |= eind->elf.pointer_equality_needed;
2960
2961 /* If we were called to copy over info for a weak sym, that's all. */
2962 if (eind->elf.root.type != bfd_link_hash_indirect)
2963 return;
2964
2965 /* Copy over the GOT refcount entries that we may have already seen to
2966 the symbol which just became indirect. */
2967 edir->elf.got.refcount += eind->elf.got.refcount;
2968 eind->elf.got.refcount = 0;
2969
2970 /* And plt entries. */
2971 if (eind->elf.plt.plist != NULL)
2972 {
2973 if (edir->elf.plt.plist != NULL)
2974 {
2975 struct plt_entry **entp;
2976 struct plt_entry *ent;
2977
2978 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2979 {
2980 struct plt_entry *dent;
2981
2982 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2983 if (dent->sec == ent->sec && dent->addend == ent->addend)
2984 {
2985 dent->plt.refcount += ent->plt.refcount;
2986 *entp = ent->next;
2987 break;
2988 }
2989 if (dent == NULL)
2990 entp = &ent->next;
2991 }
2992 *entp = edir->elf.plt.plist;
2993 }
2994
2995 edir->elf.plt.plist = eind->elf.plt.plist;
2996 eind->elf.plt.plist = NULL;
2997 }
2998
2999 if (eind->elf.dynindx != -1)
3000 {
3001 if (edir->elf.dynindx != -1)
3002 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3003 edir->elf.dynstr_index);
3004 edir->elf.dynindx = eind->elf.dynindx;
3005 edir->elf.dynstr_index = eind->elf.dynstr_index;
3006 eind->elf.dynindx = -1;
3007 eind->elf.dynstr_index = 0;
3008 }
3009 }
3010
3011 /* Hook called by the linker routine which adds symbols from an object
3012 file. We use it to put .comm items in .sbss, and not .bss. */
3013
3014 static bfd_boolean
3015 ppc_elf_add_symbol_hook (bfd *abfd,
3016 struct bfd_link_info *info,
3017 Elf_Internal_Sym *sym,
3018 const char **namep ATTRIBUTE_UNUSED,
3019 flagword *flagsp ATTRIBUTE_UNUSED,
3020 asection **secp,
3021 bfd_vma *valp)
3022 {
3023 if (sym->st_shndx == SHN_COMMON
3024 && !info->relocatable
3025 && is_ppc_elf (info->output_bfd)
3026 && sym->st_size <= elf_gp_size (abfd))
3027 {
3028 /* Common symbols less than or equal to -G nn bytes are automatically
3029 put into .sbss. */
3030 struct ppc_elf_link_hash_table *htab;
3031
3032 htab = ppc_elf_hash_table (info);
3033 if (htab->sbss == NULL)
3034 {
3035 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
3036
3037 if (!htab->elf.dynobj)
3038 htab->elf.dynobj = abfd;
3039
3040 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3041 ".sbss",
3042 flags);
3043 if (htab->sbss == NULL)
3044 return FALSE;
3045 }
3046
3047 *secp = htab->sbss;
3048 *valp = sym->st_size;
3049 }
3050
3051 return TRUE;
3052 }
3053 \f
3054 static bfd_boolean
3055 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
3056 elf_linker_section_t *lsect)
3057 {
3058 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
3059 TRUE, FALSE, TRUE);
3060 if (lsect->sym == NULL)
3061 return FALSE;
3062 if (lsect->sym->root.type == bfd_link_hash_new)
3063 lsect->sym->non_elf = 0;
3064 lsect->sym->ref_regular = 1;
3065 return TRUE;
3066 }
3067
3068 /* Create a special linker section. */
3069
3070 static bfd_boolean
3071 ppc_elf_create_linker_section (bfd *abfd,
3072 struct bfd_link_info *info,
3073 flagword flags,
3074 elf_linker_section_t *lsect)
3075 {
3076 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
3077 asection *s;
3078
3079 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3080 | SEC_LINKER_CREATED);
3081
3082 /* Record the first bfd that needs the special sections. */
3083 if (!htab->elf.dynobj)
3084 htab->elf.dynobj = abfd;
3085
3086 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
3087 lsect->name,
3088 flags);
3089 if (s == NULL
3090 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
3091 return FALSE;
3092 lsect->section = s;
3093
3094 return create_sdata_sym (htab, lsect);
3095 }
3096
3097 /* Find a linker generated pointer with a given addend and type. */
3098
3099 static elf_linker_section_pointers_t *
3100 elf_find_pointer_linker_section
3101 (elf_linker_section_pointers_t *linker_pointers,
3102 bfd_vma addend,
3103 elf_linker_section_t *lsect)
3104 {
3105 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
3106 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
3107 return linker_pointers;
3108
3109 return NULL;
3110 }
3111
3112 /* Allocate a pointer to live in a linker created section. */
3113
3114 static bfd_boolean
3115 elf_create_pointer_linker_section (bfd *abfd,
3116 elf_linker_section_t *lsect,
3117 struct elf_link_hash_entry *h,
3118 const Elf_Internal_Rela *rel)
3119 {
3120 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
3121 elf_linker_section_pointers_t *linker_section_ptr;
3122 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
3123 bfd_size_type amt;
3124
3125 BFD_ASSERT (lsect != NULL);
3126
3127 /* Is this a global symbol? */
3128 if (h != NULL)
3129 {
3130 struct ppc_elf_link_hash_entry *eh;
3131
3132 /* Has this symbol already been allocated? If so, our work is done. */
3133 eh = (struct ppc_elf_link_hash_entry *) h;
3134 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
3135 rel->r_addend,
3136 lsect))
3137 return TRUE;
3138
3139 ptr_linker_section_ptr = &eh->linker_section_pointer;
3140 }
3141 else
3142 {
3143 BFD_ASSERT (is_ppc_elf (abfd));
3144
3145 /* Allocation of a pointer to a local symbol. */
3146 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
3147
3148 /* Allocate a table to hold the local symbols if first time. */
3149 if (!ptr)
3150 {
3151 unsigned int num_symbols = elf_symtab_hdr (abfd).sh_info;
3152
3153 amt = num_symbols;
3154 amt *= sizeof (elf_linker_section_pointers_t *);
3155 ptr = bfd_zalloc (abfd, amt);
3156
3157 if (!ptr)
3158 return FALSE;
3159
3160 elf_local_ptr_offsets (abfd) = ptr;
3161 }
3162
3163 /* Has this symbol already been allocated? If so, our work is done. */
3164 if (elf_find_pointer_linker_section (ptr[r_symndx],
3165 rel->r_addend,
3166 lsect))
3167 return TRUE;
3168
3169 ptr_linker_section_ptr = &ptr[r_symndx];
3170 }
3171
3172 /* Allocate space for a pointer in the linker section, and allocate
3173 a new pointer record from internal memory. */
3174 BFD_ASSERT (ptr_linker_section_ptr != NULL);
3175 amt = sizeof (elf_linker_section_pointers_t);
3176 linker_section_ptr = bfd_alloc (abfd, amt);
3177
3178 if (!linker_section_ptr)
3179 return FALSE;
3180
3181 linker_section_ptr->next = *ptr_linker_section_ptr;
3182 linker_section_ptr->addend = rel->r_addend;
3183 linker_section_ptr->lsect = lsect;
3184 *ptr_linker_section_ptr = linker_section_ptr;
3185
3186 linker_section_ptr->offset = lsect->section->size;
3187 lsect->section->size += 4;
3188
3189 #ifdef DEBUG
3190 fprintf (stderr,
3191 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
3192 lsect->name, (long) linker_section_ptr->offset,
3193 (long) lsect->section->size);
3194 #endif
3195
3196 return TRUE;
3197 }
3198
3199 static bfd_boolean
3200 update_local_sym_info (bfd *abfd,
3201 Elf_Internal_Shdr *symtab_hdr,
3202 unsigned long r_symndx,
3203 int tls_type)
3204 {
3205 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
3206 char *local_got_tls_masks;
3207
3208 if (local_got_refcounts == NULL)
3209 {
3210 bfd_size_type size = symtab_hdr->sh_info;
3211
3212 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
3213 local_got_refcounts = bfd_zalloc (abfd, size);
3214 if (local_got_refcounts == NULL)
3215 return FALSE;
3216 elf_local_got_refcounts (abfd) = local_got_refcounts;
3217 }
3218
3219 local_got_refcounts[r_symndx] += 1;
3220 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
3221 local_got_tls_masks[r_symndx] |= tls_type;
3222 return TRUE;
3223 }
3224
3225 static bfd_boolean
3226 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
3227 asection *sec, bfd_vma addend)
3228 {
3229 struct plt_entry *ent;
3230
3231 if (addend < 32768)
3232 sec = NULL;
3233 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3234 if (ent->sec == sec && ent->addend == addend)
3235 break;
3236 if (ent == NULL)
3237 {
3238 bfd_size_type amt = sizeof (*ent);
3239 ent = bfd_alloc (abfd, amt);
3240 if (ent == NULL)
3241 return FALSE;
3242 ent->next = h->plt.plist;
3243 ent->sec = sec;
3244 ent->addend = addend;
3245 ent->plt.refcount = 0;
3246 h->plt.plist = ent;
3247 }
3248 ent->plt.refcount += 1;
3249 return TRUE;
3250 }
3251
3252 static struct plt_entry *
3253 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
3254 {
3255 struct plt_entry *ent;
3256
3257 if (addend < 32768)
3258 sec = NULL;
3259 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
3260 if (ent->sec == sec && ent->addend == addend)
3261 break;
3262 return ent;
3263 }
3264
3265 static void
3266 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
3267 {
3268 (*_bfd_error_handler)
3269 (_("%B: relocation %s cannot be used when making a shared object"),
3270 abfd,
3271 ppc_elf_howto_table[r_type]->name);
3272 bfd_set_error (bfd_error_bad_value);
3273 }
3274
3275 /* Look through the relocs for a section during the first phase, and
3276 allocate space in the global offset table or procedure linkage
3277 table. */
3278
3279 static bfd_boolean
3280 ppc_elf_check_relocs (bfd *abfd,
3281 struct bfd_link_info *info,
3282 asection *sec,
3283 const Elf_Internal_Rela *relocs)
3284 {
3285 struct ppc_elf_link_hash_table *htab;
3286 Elf_Internal_Shdr *symtab_hdr;
3287 struct elf_link_hash_entry **sym_hashes;
3288 const Elf_Internal_Rela *rel;
3289 const Elf_Internal_Rela *rel_end;
3290 asection *got2, *sreloc;
3291
3292 if (info->relocatable)
3293 return TRUE;
3294
3295 /* Don't do anything special with non-loaded, non-alloced sections.
3296 In particular, any relocs in such sections should not affect GOT
3297 and PLT reference counting (ie. we don't allow them to create GOT
3298 or PLT entries), there's no possibility or desire to optimize TLS
3299 relocs, and there's not much point in propagating relocs to shared
3300 libs that the dynamic linker won't relocate. */
3301 if ((sec->flags & SEC_ALLOC) == 0)
3302 return TRUE;
3303
3304 #ifdef DEBUG
3305 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
3306 sec, abfd);
3307 #endif
3308
3309 BFD_ASSERT (is_ppc_elf (abfd));
3310
3311 /* Initialize howto table if not already done. */
3312 if (!ppc_elf_howto_table[R_PPC_ADDR32])
3313 ppc_elf_howto_init ();
3314
3315 htab = ppc_elf_hash_table (info);
3316 symtab_hdr = &elf_symtab_hdr (abfd);
3317 sym_hashes = elf_sym_hashes (abfd);
3318 got2 = bfd_get_section_by_name (abfd, ".got2");
3319 sreloc = NULL;
3320
3321 rel_end = relocs + sec->reloc_count;
3322 for (rel = relocs; rel < rel_end; rel++)
3323 {
3324 unsigned long r_symndx;
3325 enum elf_ppc_reloc_type r_type;
3326 struct elf_link_hash_entry *h;
3327 int tls_type = 0;
3328
3329 r_symndx = ELF32_R_SYM (rel->r_info);
3330 if (r_symndx < symtab_hdr->sh_info)
3331 h = NULL;
3332 else
3333 {
3334 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3335 while (h->root.type == bfd_link_hash_indirect
3336 || h->root.type == bfd_link_hash_warning)
3337 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3338 }
3339
3340 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3341 This shows up in particular in an R_PPC_ADDR32 in the eabi
3342 startup code. */
3343 if (h != NULL
3344 && htab->got == NULL
3345 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3346 {
3347 if (htab->elf.dynobj == NULL)
3348 htab->elf.dynobj = abfd;
3349 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3350 return FALSE;
3351 BFD_ASSERT (h == htab->elf.hgot);
3352 }
3353
3354 r_type = ELF32_R_TYPE (rel->r_info);
3355 switch (r_type)
3356 {
3357 case R_PPC_GOT_TLSLD16:
3358 case R_PPC_GOT_TLSLD16_LO:
3359 case R_PPC_GOT_TLSLD16_HI:
3360 case R_PPC_GOT_TLSLD16_HA:
3361 tls_type = TLS_TLS | TLS_LD;
3362 goto dogottls;
3363
3364 case R_PPC_GOT_TLSGD16:
3365 case R_PPC_GOT_TLSGD16_LO:
3366 case R_PPC_GOT_TLSGD16_HI:
3367 case R_PPC_GOT_TLSGD16_HA:
3368 tls_type = TLS_TLS | TLS_GD;
3369 goto dogottls;
3370
3371 case R_PPC_GOT_TPREL16:
3372 case R_PPC_GOT_TPREL16_LO:
3373 case R_PPC_GOT_TPREL16_HI:
3374 case R_PPC_GOT_TPREL16_HA:
3375 if (!info->executable)
3376 info->flags |= DF_STATIC_TLS;
3377 tls_type = TLS_TLS | TLS_TPREL;
3378 goto dogottls;
3379
3380 case R_PPC_GOT_DTPREL16:
3381 case R_PPC_GOT_DTPREL16_LO:
3382 case R_PPC_GOT_DTPREL16_HI:
3383 case R_PPC_GOT_DTPREL16_HA:
3384 tls_type = TLS_TLS | TLS_DTPREL;
3385 dogottls:
3386 sec->has_tls_reloc = 1;
3387 /* Fall thru */
3388
3389 /* GOT16 relocations */
3390 case R_PPC_GOT16:
3391 case R_PPC_GOT16_LO:
3392 case R_PPC_GOT16_HI:
3393 case R_PPC_GOT16_HA:
3394 /* This symbol requires a global offset table entry. */
3395 if (htab->got == NULL)
3396 {
3397 if (htab->elf.dynobj == NULL)
3398 htab->elf.dynobj = abfd;
3399 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3400 return FALSE;
3401 }
3402 if (h != NULL)
3403 {
3404 h->got.refcount += 1;
3405 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3406 }
3407 else
3408 /* This is a global offset table entry for a local symbol. */
3409 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3410 return FALSE;
3411 break;
3412
3413 /* Indirect .sdata relocation. */
3414 case R_PPC_EMB_SDAI16:
3415 if (info->shared)
3416 {
3417 bad_shared_reloc (abfd, r_type);
3418 return FALSE;
3419 }
3420 if (htab->sdata[0].section == NULL
3421 && !ppc_elf_create_linker_section (abfd, info, 0,
3422 &htab->sdata[0]))
3423 return FALSE;
3424 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3425 h, rel))
3426 return FALSE;
3427 if (h != NULL)
3428 {
3429 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3430 h->non_got_ref = TRUE;
3431 }
3432 break;
3433
3434 /* Indirect .sdata2 relocation. */
3435 case R_PPC_EMB_SDA2I16:
3436 if (info->shared)
3437 {
3438 bad_shared_reloc (abfd, r_type);
3439 return FALSE;
3440 }
3441 if (htab->sdata[1].section == NULL
3442 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3443 &htab->sdata[1]))
3444 return FALSE;
3445 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3446 h, rel))
3447 return FALSE;
3448 if (h != NULL)
3449 {
3450 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3451 h->non_got_ref = TRUE;
3452 }
3453 break;
3454
3455 case R_PPC_SDAREL16:
3456 if (info->shared)
3457 {
3458 bad_shared_reloc (abfd, r_type);
3459 return FALSE;
3460 }
3461 if (htab->sdata[0].sym == NULL
3462 && !create_sdata_sym (htab, &htab->sdata[0]))
3463 return FALSE;
3464 if (h != NULL)
3465 {
3466 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3467 h->non_got_ref = TRUE;
3468 }
3469 break;
3470
3471 case R_PPC_EMB_SDA2REL:
3472 if (info->shared)
3473 {
3474 bad_shared_reloc (abfd, r_type);
3475 return FALSE;
3476 }
3477 if (htab->sdata[1].sym == NULL
3478 && !create_sdata_sym (htab, &htab->sdata[1]))
3479 return FALSE;
3480 if (h != NULL)
3481 {
3482 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3483 h->non_got_ref = TRUE;
3484 }
3485 break;
3486
3487 case R_PPC_EMB_SDA21:
3488 case R_PPC_EMB_RELSDA:
3489 if (info->shared)
3490 {
3491 bad_shared_reloc (abfd, r_type);
3492 return FALSE;
3493 }
3494 if (htab->sdata[0].sym == NULL
3495 && !create_sdata_sym (htab, &htab->sdata[0]))
3496 return FALSE;
3497 if (htab->sdata[1].sym == NULL
3498 && !create_sdata_sym (htab, &htab->sdata[1]))
3499 return FALSE;
3500 if (h != NULL)
3501 {
3502 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3503 h->non_got_ref = TRUE;
3504 }
3505 break;
3506
3507 case R_PPC_EMB_NADDR32:
3508 case R_PPC_EMB_NADDR16:
3509 case R_PPC_EMB_NADDR16_LO:
3510 case R_PPC_EMB_NADDR16_HI:
3511 case R_PPC_EMB_NADDR16_HA:
3512 if (info->shared)
3513 {
3514 bad_shared_reloc (abfd, r_type);
3515 return FALSE;
3516 }
3517 if (h != NULL)
3518 h->non_got_ref = TRUE;
3519 break;
3520
3521 case R_PPC_PLT32:
3522 case R_PPC_PLTREL24:
3523 case R_PPC_PLTREL32:
3524 case R_PPC_PLT16_LO:
3525 case R_PPC_PLT16_HI:
3526 case R_PPC_PLT16_HA:
3527 #ifdef DEBUG
3528 fprintf (stderr, "Reloc requires a PLT entry\n");
3529 #endif
3530 /* This symbol requires a procedure linkage table entry. We
3531 actually build the entry in finish_dynamic_symbol,
3532 because this might be a case of linking PIC code without
3533 linking in any dynamic objects, in which case we don't
3534 need to generate a procedure linkage table after all. */
3535
3536 if (h == NULL)
3537 {
3538 /* It does not make sense to have a procedure linkage
3539 table entry for a local symbol. */
3540 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3541 "local symbol"),
3542 abfd,
3543 sec,
3544 (long) rel->r_offset,
3545 ppc_elf_howto_table[r_type]->name);
3546 bfd_set_error (bfd_error_bad_value);
3547 return FALSE;
3548 }
3549 else
3550 {
3551 bfd_vma addend = 0;
3552
3553 if (r_type == R_PPC_PLTREL24)
3554 {
3555 ppc_elf_tdata (abfd)->makes_plt_call = 1;
3556 addend = rel->r_addend;
3557 }
3558 h->needs_plt = 1;
3559 if (!update_plt_info (abfd, h, got2, addend))
3560 return FALSE;
3561 }
3562 break;
3563
3564 /* The following relocations don't need to propagate the
3565 relocation if linking a shared object since they are
3566 section relative. */
3567 case R_PPC_SECTOFF:
3568 case R_PPC_SECTOFF_LO:
3569 case R_PPC_SECTOFF_HI:
3570 case R_PPC_SECTOFF_HA:
3571 case R_PPC_DTPREL16:
3572 case R_PPC_DTPREL16_LO:
3573 case R_PPC_DTPREL16_HI:
3574 case R_PPC_DTPREL16_HA:
3575 case R_PPC_TOC16:
3576 break;
3577
3578 case R_PPC_REL16:
3579 case R_PPC_REL16_LO:
3580 case R_PPC_REL16_HI:
3581 case R_PPC_REL16_HA:
3582 ppc_elf_tdata (abfd)->has_rel16 = 1;
3583 break;
3584
3585 /* These are just markers. */
3586 case R_PPC_TLS:
3587 case R_PPC_EMB_MRKREF:
3588 case R_PPC_NONE:
3589 case R_PPC_max:
3590 break;
3591
3592 /* These should only appear in dynamic objects. */
3593 case R_PPC_COPY:
3594 case R_PPC_GLOB_DAT:
3595 case R_PPC_JMP_SLOT:
3596 case R_PPC_RELATIVE:
3597 break;
3598
3599 /* These aren't handled yet. We'll report an error later. */
3600 case R_PPC_ADDR30:
3601 case R_PPC_EMB_RELSEC16:
3602 case R_PPC_EMB_RELST_LO:
3603 case R_PPC_EMB_RELST_HI:
3604 case R_PPC_EMB_RELST_HA:
3605 case R_PPC_EMB_BIT_FLD:
3606 break;
3607
3608 /* This refers only to functions defined in the shared library. */
3609 case R_PPC_LOCAL24PC:
3610 if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
3611 {
3612 htab->plt_type = PLT_OLD;
3613 htab->old_bfd = abfd;
3614 }
3615 break;
3616
3617 /* This relocation describes the C++ object vtable hierarchy.
3618 Reconstruct it for later use during GC. */
3619 case R_PPC_GNU_VTINHERIT:
3620 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3621 return FALSE;
3622 break;
3623
3624 /* This relocation describes which C++ vtable entries are actually
3625 used. Record for later use during GC. */
3626 case R_PPC_GNU_VTENTRY:
3627 BFD_ASSERT (h != NULL);
3628 if (h != NULL
3629 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3630 return FALSE;
3631 break;
3632
3633 /* We shouldn't really be seeing these. */
3634 case R_PPC_TPREL32:
3635 case R_PPC_TPREL16:
3636 case R_PPC_TPREL16_LO:
3637 case R_PPC_TPREL16_HI:
3638 case R_PPC_TPREL16_HA:
3639 if (!info->executable)
3640 info->flags |= DF_STATIC_TLS;
3641 goto dodyn;
3642
3643 /* Nor these. */
3644 case R_PPC_DTPMOD32:
3645 case R_PPC_DTPREL32:
3646 goto dodyn;
3647
3648 case R_PPC_REL32:
3649 if (h == NULL
3650 && got2 != NULL
3651 && (sec->flags & SEC_CODE) != 0
3652 && (info->shared || info->pie)
3653 && htab->plt_type == PLT_UNSET)
3654 {
3655 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3656 the start of a function, which assembles to a REL32
3657 reference to .got2. If we detect one of these, then
3658 force the old PLT layout because the linker cannot
3659 reliably deduce the GOT pointer value needed for
3660 PLT call stubs. */
3661 asection *s;
3662
3663 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3664 r_symndx);
3665 if (s == got2)
3666 {
3667 htab->plt_type = PLT_OLD;
3668 htab->old_bfd = abfd;
3669 }
3670 }
3671 if (h == NULL || h == htab->elf.hgot)
3672 break;
3673 /* fall through */
3674
3675 case R_PPC_ADDR32:
3676 case R_PPC_ADDR16:
3677 case R_PPC_ADDR16_LO:
3678 case R_PPC_ADDR16_HI:
3679 case R_PPC_ADDR16_HA:
3680 case R_PPC_UADDR32:
3681 case R_PPC_UADDR16:
3682 if (h != NULL && !info->shared)
3683 {
3684 /* We may need a plt entry if the symbol turns out to be
3685 a function defined in a dynamic object. */
3686 if (!update_plt_info (abfd, h, NULL, 0))
3687 return FALSE;
3688
3689 /* We may need a copy reloc too. */
3690 h->non_got_ref = 1;
3691 h->pointer_equality_needed = 1;
3692 }
3693 goto dodyn;
3694
3695 case R_PPC_REL24:
3696 case R_PPC_REL14:
3697 case R_PPC_REL14_BRTAKEN:
3698 case R_PPC_REL14_BRNTAKEN:
3699 if (h == NULL)
3700 break;
3701 if (h == htab->elf.hgot)
3702 {
3703 if (htab->plt_type == PLT_UNSET)
3704 {
3705 htab->plt_type = PLT_OLD;
3706 htab->old_bfd = abfd;
3707 }
3708 break;
3709 }
3710 /* fall through */
3711
3712 case R_PPC_ADDR24:
3713 case R_PPC_ADDR14:
3714 case R_PPC_ADDR14_BRTAKEN:
3715 case R_PPC_ADDR14_BRNTAKEN:
3716 if (h != NULL && !info->shared)
3717 {
3718 /* We may need a plt entry if the symbol turns out to be
3719 a function defined in a dynamic object. */
3720 if (!update_plt_info (abfd, h, NULL, 0))
3721 return FALSE;
3722 break;
3723 }
3724
3725 dodyn:
3726 /* If we are creating a shared library, and this is a reloc
3727 against a global symbol, or a non PC relative reloc
3728 against a local symbol, then we need to copy the reloc
3729 into the shared library. However, if we are linking with
3730 -Bsymbolic, we do not need to copy a reloc against a
3731 global symbol which is defined in an object we are
3732 including in the link (i.e., DEF_REGULAR is set). At
3733 this point we have not seen all the input files, so it is
3734 possible that DEF_REGULAR is not set now but will be set
3735 later (it is never cleared). In case of a weak definition,
3736 DEF_REGULAR may be cleared later by a strong definition in
3737 a shared library. We account for that possibility below by
3738 storing information in the dyn_relocs field of the hash
3739 table entry. A similar situation occurs when creating
3740 shared libraries and symbol visibility changes render the
3741 symbol local.
3742
3743 If on the other hand, we are creating an executable, we
3744 may need to keep relocations for symbols satisfied by a
3745 dynamic library if we manage to avoid copy relocs for the
3746 symbol. */
3747 if ((info->shared
3748 && (must_be_dyn_reloc (info, r_type)
3749 || (h != NULL
3750 && (! info->symbolic
3751 || h->root.type == bfd_link_hash_defweak
3752 || !h->def_regular))))
3753 || (ELIMINATE_COPY_RELOCS
3754 && !info->shared
3755 && h != NULL
3756 && (h->root.type == bfd_link_hash_defweak
3757 || !h->def_regular)))
3758 {
3759 struct ppc_elf_dyn_relocs *p;
3760 struct ppc_elf_dyn_relocs **head;
3761
3762 #ifdef DEBUG
3763 fprintf (stderr,
3764 "ppc_elf_check_relocs needs to "
3765 "create relocation for %s\n",
3766 (h && h->root.root.string
3767 ? h->root.root.string : "<unknown>"));
3768 #endif
3769 if (sreloc == NULL)
3770 {
3771 if (htab->elf.dynobj == NULL)
3772 htab->elf.dynobj = abfd;
3773
3774 sreloc = _bfd_elf_make_dynamic_reloc_section
3775 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
3776
3777 if (sreloc == NULL)
3778 return FALSE;
3779 }
3780
3781 /* If this is a global symbol, we count the number of
3782 relocations we need for this symbol. */
3783 if (h != NULL)
3784 {
3785 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3786 }
3787 else
3788 {
3789 /* Track dynamic relocs needed for local syms too.
3790 We really need local syms available to do this
3791 easily. Oh well. */
3792
3793 asection *s;
3794 void *vpp;
3795
3796 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3797 sec, r_symndx);
3798 if (s == NULL)
3799 return FALSE;
3800
3801 vpp = &elf_section_data (s)->local_dynrel;
3802 head = (struct ppc_elf_dyn_relocs **) vpp;
3803 }
3804
3805 p = *head;
3806 if (p == NULL || p->sec != sec)
3807 {
3808 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3809 if (p == NULL)
3810 return FALSE;
3811 p->next = *head;
3812 *head = p;
3813 p->sec = sec;
3814 p->count = 0;
3815 p->pc_count = 0;
3816 }
3817
3818 p->count += 1;
3819 if (!must_be_dyn_reloc (info, r_type))
3820 p->pc_count += 1;
3821 }
3822
3823 break;
3824 }
3825 }
3826
3827 return TRUE;
3828 }
3829 \f
3830
3831 /* Merge object attributes from IBFD into OBFD. Raise an error if
3832 there are conflicting attributes. */
3833 static bfd_boolean
3834 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3835 {
3836 obj_attribute *in_attr, *in_attrs;
3837 obj_attribute *out_attr, *out_attrs;
3838
3839 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3840 {
3841 /* This is the first object. Copy the attributes. */
3842 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3843
3844 /* Use the Tag_null value to indicate the attributes have been
3845 initialized. */
3846 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3847
3848 return TRUE;
3849 }
3850
3851 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3852 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3853
3854 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3855 non-conflicting ones. */
3856 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3857 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3858 if (in_attr->i != out_attr->i)
3859 {
3860 out_attr->type = 1;
3861 if (out_attr->i == 0)
3862 out_attr->i = in_attr->i;
3863 else if (in_attr->i == 0)
3864 ;
3865 else if (out_attr->i == 1 && in_attr->i == 2)
3866 _bfd_error_handler
3867 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3868 else if (out_attr->i == 1 && in_attr->i == 3)
3869 _bfd_error_handler
3870 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3871 obfd, ibfd);
3872 else if (out_attr->i == 3 && in_attr->i == 1)
3873 _bfd_error_handler
3874 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3875 ibfd, obfd);
3876 else if (out_attr->i == 3 && in_attr->i == 2)
3877 _bfd_error_handler
3878 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3879 ibfd, obfd);
3880 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3881 _bfd_error_handler
3882 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3883 else if (in_attr->i > 3)
3884 _bfd_error_handler
3885 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3886 in_attr->i);
3887 else
3888 _bfd_error_handler
3889 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3890 out_attr->i);
3891 }
3892
3893 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3894 merge non-conflicting ones. */
3895 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3896 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3897 if (in_attr->i != out_attr->i)
3898 {
3899 const char *in_abi = NULL, *out_abi = NULL;
3900
3901 switch (in_attr->i)
3902 {
3903 case 1: in_abi = "generic"; break;
3904 case 2: in_abi = "AltiVec"; break;
3905 case 3: in_abi = "SPE"; break;
3906 }
3907
3908 switch (out_attr->i)
3909 {
3910 case 1: out_abi = "generic"; break;
3911 case 2: out_abi = "AltiVec"; break;
3912 case 3: out_abi = "SPE"; break;
3913 }
3914
3915 out_attr->type = 1;
3916 if (out_attr->i == 0)
3917 out_attr->i = in_attr->i;
3918 else if (in_attr->i == 0)
3919 ;
3920 /* For now, allow generic to transition to AltiVec or SPE
3921 without a warning. If GCC marked files with their stack
3922 alignment and used don't-care markings for files which are
3923 not affected by the vector ABI, we could warn about this
3924 case too. */
3925 else if (out_attr->i == 1)
3926 out_attr->i = in_attr->i;
3927 else if (in_attr->i == 1)
3928 ;
3929 else if (in_abi == NULL)
3930 _bfd_error_handler
3931 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3932 in_attr->i);
3933 else if (out_abi == NULL)
3934 _bfd_error_handler
3935 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3936 in_attr->i);
3937 else
3938 _bfd_error_handler
3939 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3940 ibfd, obfd, in_abi, out_abi);
3941 }
3942
3943 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
3944 and merge non-conflicting ones. */
3945 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
3946 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
3947 if (in_attr->i != out_attr->i)
3948 {
3949 out_attr->type = 1;
3950 if (out_attr->i == 0)
3951 out_attr->i = in_attr->i;
3952 else if (in_attr->i == 0)
3953 ;
3954 else if (out_attr->i == 1 && in_attr->i == 2)
3955 _bfd_error_handler
3956 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
3957 else if (out_attr->i == 2 && in_attr->i == 1)
3958 _bfd_error_handler
3959 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
3960 else if (in_attr->i > 2)
3961 _bfd_error_handler
3962 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
3963 in_attr->i);
3964 else
3965 _bfd_error_handler
3966 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
3967 out_attr->i);
3968 }
3969
3970 /* Merge Tag_compatibility attributes and any common GNU ones. */
3971 _bfd_elf_merge_object_attributes (ibfd, obfd);
3972
3973 return TRUE;
3974 }
3975
3976 /* Merge backend specific data from an object file to the output
3977 object file when linking. */
3978
3979 static bfd_boolean
3980 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3981 {
3982 flagword old_flags;
3983 flagword new_flags;
3984 bfd_boolean error;
3985
3986 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
3987 return TRUE;
3988
3989 /* Check if we have the same endianess. */
3990 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3991 return FALSE;
3992
3993 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
3994 return FALSE;
3995
3996 new_flags = elf_elfheader (ibfd)->e_flags;
3997 old_flags = elf_elfheader (obfd)->e_flags;
3998 if (!elf_flags_init (obfd))
3999 {
4000 /* First call, no flags set. */
4001 elf_flags_init (obfd) = TRUE;
4002 elf_elfheader (obfd)->e_flags = new_flags;
4003 }
4004
4005 /* Compatible flags are ok. */
4006 else if (new_flags == old_flags)
4007 ;
4008
4009 /* Incompatible flags. */
4010 else
4011 {
4012 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4013 to be linked with either. */
4014 error = FALSE;
4015 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4016 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4017 {
4018 error = TRUE;
4019 (*_bfd_error_handler)
4020 (_("%B: compiled with -mrelocatable and linked with "
4021 "modules compiled normally"), ibfd);
4022 }
4023 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4024 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4025 {
4026 error = TRUE;
4027 (*_bfd_error_handler)
4028 (_("%B: compiled normally and linked with "
4029 "modules compiled with -mrelocatable"), ibfd);
4030 }
4031
4032 /* The output is -mrelocatable-lib iff both the input files are. */
4033 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4034 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4035
4036 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4037 but each input file is either -mrelocatable or -mrelocatable-lib. */
4038 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4039 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4040 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4041 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4042
4043 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4044 any module uses it. */
4045 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4046
4047 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4048 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4049
4050 /* Warn about any other mismatches. */
4051 if (new_flags != old_flags)
4052 {
4053 error = TRUE;
4054 (*_bfd_error_handler)
4055 (_("%B: uses different e_flags (0x%lx) fields "
4056 "than previous modules (0x%lx)"),
4057 ibfd, (long) new_flags, (long) old_flags);
4058 }
4059
4060 if (error)
4061 {
4062 bfd_set_error (bfd_error_bad_value);
4063 return FALSE;
4064 }
4065 }
4066
4067 return TRUE;
4068 }
4069 \f
4070 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4071 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4072 int
4073 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4074 struct bfd_link_info *info,
4075 enum ppc_elf_plt_type plt_style,
4076 int emit_stub_syms)
4077 {
4078 struct ppc_elf_link_hash_table *htab;
4079 flagword flags;
4080
4081 htab = ppc_elf_hash_table (info);
4082
4083 if (htab->plt_type == PLT_UNSET)
4084 {
4085 if (plt_style == PLT_OLD)
4086 htab->plt_type = PLT_OLD;
4087 else
4088 {
4089 bfd *ibfd;
4090 enum ppc_elf_plt_type plt_type = plt_style;
4091
4092 /* Look through the reloc flags left by ppc_elf_check_relocs.
4093 Use the old style bss plt if a file makes plt calls
4094 without using the new relocs, and if ld isn't given
4095 --secure-plt and we never see REL16 relocs. */
4096 if (plt_type == PLT_UNSET)
4097 plt_type = PLT_OLD;
4098 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4099 if (is_ppc_elf (ibfd))
4100 {
4101 if (ppc_elf_tdata (ibfd)->has_rel16)
4102 plt_type = PLT_NEW;
4103 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4104 {
4105 plt_type = PLT_OLD;
4106 htab->old_bfd = ibfd;
4107 break;
4108 }
4109 }
4110 htab->plt_type = plt_type;
4111 }
4112 }
4113 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4114 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4115
4116 htab->emit_stub_syms = emit_stub_syms;
4117
4118 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4119
4120 if (htab->plt_type == PLT_NEW)
4121 {
4122 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4123 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4124
4125 /* The new PLT is a loaded section. */
4126 if (htab->plt != NULL
4127 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4128 return -1;
4129
4130 /* The new GOT is not executable. */
4131 if (htab->got != NULL
4132 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4133 return -1;
4134 }
4135 else
4136 {
4137 /* Stop an unused .glink section from affecting .text alignment. */
4138 if (htab->glink != NULL
4139 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4140 return -1;
4141 }
4142 return htab->plt_type == PLT_NEW;
4143 }
4144 \f
4145 /* Return the section that should be marked against GC for a given
4146 relocation. */
4147
4148 static asection *
4149 ppc_elf_gc_mark_hook (asection *sec,
4150 struct bfd_link_info *info,
4151 Elf_Internal_Rela *rel,
4152 struct elf_link_hash_entry *h,
4153 Elf_Internal_Sym *sym)
4154 {
4155 if (h != NULL)
4156 switch (ELF32_R_TYPE (rel->r_info))
4157 {
4158 case R_PPC_GNU_VTINHERIT:
4159 case R_PPC_GNU_VTENTRY:
4160 return NULL;
4161 }
4162
4163 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4164 }
4165
4166 /* Update the got, plt and dynamic reloc reference counts for the
4167 section being removed. */
4168
4169 static bfd_boolean
4170 ppc_elf_gc_sweep_hook (bfd *abfd,
4171 struct bfd_link_info *info,
4172 asection *sec,
4173 const Elf_Internal_Rela *relocs)
4174 {
4175 struct ppc_elf_link_hash_table *htab;
4176 Elf_Internal_Shdr *symtab_hdr;
4177 struct elf_link_hash_entry **sym_hashes;
4178 bfd_signed_vma *local_got_refcounts;
4179 const Elf_Internal_Rela *rel, *relend;
4180 asection *got2;
4181
4182 if (info->relocatable)
4183 return TRUE;
4184
4185 if ((sec->flags & SEC_ALLOC) == 0)
4186 return TRUE;
4187
4188 elf_section_data (sec)->local_dynrel = NULL;
4189
4190 htab = ppc_elf_hash_table (info);
4191 symtab_hdr = &elf_symtab_hdr (abfd);
4192 sym_hashes = elf_sym_hashes (abfd);
4193 local_got_refcounts = elf_local_got_refcounts (abfd);
4194 got2 = bfd_get_section_by_name (abfd, ".got2");
4195
4196 relend = relocs + sec->reloc_count;
4197 for (rel = relocs; rel < relend; rel++)
4198 {
4199 unsigned long r_symndx;
4200 enum elf_ppc_reloc_type r_type;
4201 struct elf_link_hash_entry *h = NULL;
4202
4203 r_symndx = ELF32_R_SYM (rel->r_info);
4204 if (r_symndx >= symtab_hdr->sh_info)
4205 {
4206 struct ppc_elf_dyn_relocs **pp, *p;
4207 struct ppc_elf_link_hash_entry *eh;
4208
4209 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4210 while (h->root.type == bfd_link_hash_indirect
4211 || h->root.type == bfd_link_hash_warning)
4212 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4213 eh = (struct ppc_elf_link_hash_entry *) h;
4214
4215 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4216 if (p->sec == sec)
4217 {
4218 /* Everything must go for SEC. */
4219 *pp = p->next;
4220 break;
4221 }
4222 }
4223
4224 r_type = ELF32_R_TYPE (rel->r_info);
4225 switch (r_type)
4226 {
4227 case R_PPC_GOT_TLSLD16:
4228 case R_PPC_GOT_TLSLD16_LO:
4229 case R_PPC_GOT_TLSLD16_HI:
4230 case R_PPC_GOT_TLSLD16_HA:
4231 case R_PPC_GOT_TLSGD16:
4232 case R_PPC_GOT_TLSGD16_LO:
4233 case R_PPC_GOT_TLSGD16_HI:
4234 case R_PPC_GOT_TLSGD16_HA:
4235 case R_PPC_GOT_TPREL16:
4236 case R_PPC_GOT_TPREL16_LO:
4237 case R_PPC_GOT_TPREL16_HI:
4238 case R_PPC_GOT_TPREL16_HA:
4239 case R_PPC_GOT_DTPREL16:
4240 case R_PPC_GOT_DTPREL16_LO:
4241 case R_PPC_GOT_DTPREL16_HI:
4242 case R_PPC_GOT_DTPREL16_HA:
4243 case R_PPC_GOT16:
4244 case R_PPC_GOT16_LO:
4245 case R_PPC_GOT16_HI:
4246 case R_PPC_GOT16_HA:
4247 if (h != NULL)
4248 {
4249 if (h->got.refcount > 0)
4250 h->got.refcount--;
4251 }
4252 else if (local_got_refcounts != NULL)
4253 {
4254 if (local_got_refcounts[r_symndx] > 0)
4255 local_got_refcounts[r_symndx]--;
4256 }
4257 break;
4258
4259 case R_PPC_REL24:
4260 case R_PPC_REL14:
4261 case R_PPC_REL14_BRTAKEN:
4262 case R_PPC_REL14_BRNTAKEN:
4263 case R_PPC_REL32:
4264 if (h == NULL || h == htab->elf.hgot)
4265 break;
4266 /* Fall thru */
4267
4268 case R_PPC_ADDR32:
4269 case R_PPC_ADDR24:
4270 case R_PPC_ADDR16:
4271 case R_PPC_ADDR16_LO:
4272 case R_PPC_ADDR16_HI:
4273 case R_PPC_ADDR16_HA:
4274 case R_PPC_ADDR14:
4275 case R_PPC_ADDR14_BRTAKEN:
4276 case R_PPC_ADDR14_BRNTAKEN:
4277 case R_PPC_UADDR32:
4278 case R_PPC_UADDR16:
4279 if (info->shared)
4280 break;
4281
4282 case R_PPC_PLT32:
4283 case R_PPC_PLTREL24:
4284 case R_PPC_PLTREL32:
4285 case R_PPC_PLT16_LO:
4286 case R_PPC_PLT16_HI:
4287 case R_PPC_PLT16_HA:
4288 if (h != NULL)
4289 {
4290 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4291 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4292 if (ent->plt.refcount > 0)
4293 ent->plt.refcount -= 1;
4294 }
4295 break;
4296
4297 default:
4298 break;
4299 }
4300 }
4301 return TRUE;
4302 }
4303 \f
4304 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4305
4306 asection *
4307 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4308 {
4309 struct ppc_elf_link_hash_table *htab;
4310
4311 htab = ppc_elf_hash_table (info);
4312 if (htab->plt_type == PLT_NEW
4313 && htab->plt != NULL
4314 && htab->plt->output_section != NULL)
4315 {
4316 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4317 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4318 }
4319
4320 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4321 FALSE, FALSE, TRUE);
4322 return _bfd_elf_tls_setup (obfd, info);
4323 }
4324
4325 /* Run through all the TLS relocs looking for optimization
4326 opportunities. */
4327
4328 bfd_boolean
4329 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4330 struct bfd_link_info *info)
4331 {
4332 bfd *ibfd;
4333 asection *sec;
4334 struct ppc_elf_link_hash_table *htab;
4335 int pass;
4336
4337 if (info->relocatable || !info->executable)
4338 return TRUE;
4339
4340 htab = ppc_elf_hash_table (info);
4341 /* Make two passes through the relocs. First time check that tls
4342 relocs involved in setting up a tls_get_addr call are indeed
4343 followed by such a call. If they are not, exclude them from
4344 the optimizations done on the second pass. */
4345 for (pass = 0; pass < 2; ++pass)
4346 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4347 {
4348 Elf_Internal_Sym *locsyms = NULL;
4349 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4350
4351 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4352 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4353 {
4354 Elf_Internal_Rela *relstart, *rel, *relend;
4355
4356 /* Read the relocations. */
4357 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4358 info->keep_memory);
4359 if (relstart == NULL)
4360 return FALSE;
4361
4362 relend = relstart + sec->reloc_count;
4363 for (rel = relstart; rel < relend; rel++)
4364 {
4365 enum elf_ppc_reloc_type r_type;
4366 unsigned long r_symndx;
4367 struct elf_link_hash_entry *h = NULL;
4368 char *tls_mask;
4369 char tls_set, tls_clear;
4370 bfd_boolean is_local;
4371 int expecting_tls_get_addr;
4372 bfd_signed_vma *got_count;
4373
4374 r_symndx = ELF32_R_SYM (rel->r_info);
4375 if (r_symndx >= symtab_hdr->sh_info)
4376 {
4377 struct elf_link_hash_entry **sym_hashes;
4378
4379 sym_hashes = elf_sym_hashes (ibfd);
4380 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4381 while (h->root.type == bfd_link_hash_indirect
4382 || h->root.type == bfd_link_hash_warning)
4383 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4384 }
4385
4386 expecting_tls_get_addr = 0;
4387 is_local = FALSE;
4388 if (h == NULL
4389 || !h->def_dynamic)
4390 is_local = TRUE;
4391
4392 r_type = ELF32_R_TYPE (rel->r_info);
4393 switch (r_type)
4394 {
4395 case R_PPC_GOT_TLSLD16:
4396 case R_PPC_GOT_TLSLD16_LO:
4397 expecting_tls_get_addr = 1;
4398 /* Fall thru */
4399
4400 case R_PPC_GOT_TLSLD16_HI:
4401 case R_PPC_GOT_TLSLD16_HA:
4402 /* These relocs should never be against a symbol
4403 defined in a shared lib. Leave them alone if
4404 that turns out to be the case. */
4405 if (!is_local)
4406 continue;
4407
4408 /* LD -> LE */
4409 tls_set = 0;
4410 tls_clear = TLS_LD;
4411 break;
4412
4413 case R_PPC_GOT_TLSGD16:
4414 case R_PPC_GOT_TLSGD16_LO:
4415 expecting_tls_get_addr = 1;
4416 /* Fall thru */
4417
4418 case R_PPC_GOT_TLSGD16_HI:
4419 case R_PPC_GOT_TLSGD16_HA:
4420 if (is_local)
4421 /* GD -> LE */
4422 tls_set = 0;
4423 else
4424 /* GD -> IE */
4425 tls_set = TLS_TLS | TLS_TPRELGD;
4426 tls_clear = TLS_GD;
4427 break;
4428
4429 case R_PPC_GOT_TPREL16:
4430 case R_PPC_GOT_TPREL16_LO:
4431 case R_PPC_GOT_TPREL16_HI:
4432 case R_PPC_GOT_TPREL16_HA:
4433 if (is_local)
4434 {
4435 /* IE -> LE */
4436 tls_set = 0;
4437 tls_clear = TLS_TPREL;
4438 break;
4439 }
4440 else
4441 continue;
4442
4443 default:
4444 continue;
4445 }
4446
4447 if (pass == 0)
4448 {
4449 if (!expecting_tls_get_addr)
4450 continue;
4451
4452 if (rel + 1 < relend)
4453 {
4454 enum elf_ppc_reloc_type r_type2;
4455 unsigned long r_symndx2;
4456 struct elf_link_hash_entry *h2;
4457
4458 /* The next instruction should be a call to
4459 __tls_get_addr. Peek at the reloc to be sure. */
4460 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4461 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4462 if (r_symndx2 >= symtab_hdr->sh_info
4463 && (r_type2 == R_PPC_REL14
4464 || r_type2 == R_PPC_REL14_BRTAKEN
4465 || r_type2 == R_PPC_REL14_BRNTAKEN
4466 || r_type2 == R_PPC_REL24
4467 || r_type2 == R_PPC_PLTREL24))
4468 {
4469 struct elf_link_hash_entry **sym_hashes;
4470
4471 sym_hashes = elf_sym_hashes (ibfd);
4472 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4473 while (h2->root.type == bfd_link_hash_indirect
4474 || h2->root.type == bfd_link_hash_warning)
4475 h2 = ((struct elf_link_hash_entry *)
4476 h2->root.u.i.link);
4477 if (h2 == htab->tls_get_addr)
4478 continue;
4479 }
4480 }
4481
4482 /* Uh oh, we didn't find the expected call. We
4483 could just mark this symbol to exclude it
4484 from tls optimization but it's safer to skip
4485 the entire section. */
4486 sec->has_tls_reloc = 0;
4487 break;
4488 }
4489
4490 if (h != NULL)
4491 {
4492 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4493 got_count = &h->got.refcount;
4494 }
4495 else
4496 {
4497 Elf_Internal_Sym *sym;
4498 bfd_signed_vma *lgot_refs;
4499 char *lgot_masks;
4500
4501 if (locsyms == NULL)
4502 {
4503 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4504 if (locsyms == NULL)
4505 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4506 symtab_hdr->sh_info,
4507 0, NULL, NULL, NULL);
4508 if (locsyms == NULL)
4509 {
4510 if (elf_section_data (sec)->relocs != relstart)
4511 free (relstart);
4512 return FALSE;
4513 }
4514 }
4515 sym = locsyms + r_symndx;
4516 lgot_refs = elf_local_got_refcounts (ibfd);
4517 if (lgot_refs == NULL)
4518 abort ();
4519 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4520 tls_mask = &lgot_masks[r_symndx];
4521 got_count = &lgot_refs[r_symndx];
4522 }
4523
4524 if (tls_set == 0)
4525 {
4526 /* We managed to get rid of a got entry. */
4527 if (*got_count > 0)
4528 *got_count -= 1;
4529 }
4530
4531 if (expecting_tls_get_addr)
4532 {
4533 struct plt_entry *ent;
4534
4535 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4536 if (ent != NULL && ent->plt.refcount > 0)
4537 ent->plt.refcount -= 1;
4538 }
4539
4540 *tls_mask |= tls_set;
4541 *tls_mask &= ~tls_clear;
4542 }
4543
4544 if (elf_section_data (sec)->relocs != relstart)
4545 free (relstart);
4546 }
4547
4548 if (locsyms != NULL
4549 && (symtab_hdr->contents != (unsigned char *) locsyms))
4550 {
4551 if (!info->keep_memory)
4552 free (locsyms);
4553 else
4554 symtab_hdr->contents = (unsigned char *) locsyms;
4555 }
4556 }
4557 return TRUE;
4558 }
4559 \f
4560 /* Return true if we have dynamic relocs that apply to read-only sections. */
4561
4562 static bfd_boolean
4563 readonly_dynrelocs (struct elf_link_hash_entry *h)
4564 {
4565 struct ppc_elf_dyn_relocs *p;
4566
4567 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4568 {
4569 asection *s = p->sec->output_section;
4570
4571 if (s != NULL
4572 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4573 == (SEC_READONLY | SEC_ALLOC)))
4574 return TRUE;
4575 }
4576 return FALSE;
4577 }
4578
4579 /* Adjust a symbol defined by a dynamic object and referenced by a
4580 regular object. The current definition is in some section of the
4581 dynamic object, but we're not including those sections. We have to
4582 change the definition to something the rest of the link can
4583 understand. */
4584
4585 static bfd_boolean
4586 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4587 struct elf_link_hash_entry *h)
4588 {
4589 struct ppc_elf_link_hash_table *htab;
4590 asection *s;
4591
4592 #ifdef DEBUG
4593 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4594 h->root.root.string);
4595 #endif
4596
4597 /* Make sure we know what is going on here. */
4598 htab = ppc_elf_hash_table (info);
4599 BFD_ASSERT (htab->elf.dynobj != NULL
4600 && (h->needs_plt
4601 || h->u.weakdef != NULL
4602 || (h->def_dynamic
4603 && h->ref_regular
4604 && !h->def_regular)));
4605
4606 /* Deal with function syms. */
4607 if (h->type == STT_FUNC
4608 || h->needs_plt)
4609 {
4610 /* Clear procedure linkage table information for any symbol that
4611 won't need a .plt entry. */
4612 struct plt_entry *ent;
4613 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4614 if (ent->plt.refcount > 0)
4615 break;
4616 if (ent == NULL
4617 || SYMBOL_CALLS_LOCAL (info, h)
4618 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4619 && h->root.type == bfd_link_hash_undefweak))
4620 {
4621 /* A PLT entry is not required/allowed when:
4622
4623 1. We are not using ld.so; because then the PLT entry
4624 can't be set up, so we can't use one. In this case,
4625 ppc_elf_adjust_dynamic_symbol won't even be called.
4626
4627 2. GC has rendered the entry unused.
4628
4629 3. We know for certain that a call to this symbol
4630 will go to this object, or will remain undefined. */
4631 h->plt.plist = NULL;
4632 h->needs_plt = 0;
4633 }
4634 else
4635 {
4636 /* After adjust_dynamic_symbol, non_got_ref set means that
4637 dyn_relocs for this symbol should be discarded.
4638 If we get here we know we are making a PLT entry for this
4639 symbol, and in an executable we'd normally resolve
4640 relocations against this symbol to the PLT entry. Allow
4641 dynamic relocs if the reference is weak, and the dynamic
4642 relocs will not cause text relocation. */
4643 if (!h->ref_regular_nonweak
4644 && h->non_got_ref
4645 && !htab->is_vxworks
4646 && !ppc_elf_hash_entry (h)->has_sda_refs
4647 && !readonly_dynrelocs (h))
4648 h->non_got_ref = 0;
4649 }
4650 return TRUE;
4651 }
4652 else
4653 h->plt.plist = NULL;
4654
4655 /* If this is a weak symbol, and there is a real definition, the
4656 processor independent code will have arranged for us to see the
4657 real definition first, and we can just use the same value. */
4658 if (h->u.weakdef != NULL)
4659 {
4660 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4661 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4662 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4663 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4664 if (ELIMINATE_COPY_RELOCS)
4665 h->non_got_ref = h->u.weakdef->non_got_ref;
4666 return TRUE;
4667 }
4668
4669 /* This is a reference to a symbol defined by a dynamic object which
4670 is not a function. */
4671
4672 /* If we are creating a shared library, we must presume that the
4673 only references to the symbol are via the global offset table.
4674 For such cases we need not do anything here; the relocations will
4675 be handled correctly by relocate_section. */
4676 if (info->shared)
4677 return TRUE;
4678
4679 /* If there are no references to this symbol that do not use the
4680 GOT, we don't need to generate a copy reloc. */
4681 if (!h->non_got_ref)
4682 return TRUE;
4683
4684 /* If we didn't find any dynamic relocs in read-only sections, then
4685 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4686 We can't do this if there are any small data relocations. This
4687 doesn't work on VxWorks, where we can not have dynamic
4688 relocations (other than copy and jump slot relocations) in an
4689 executable. */
4690 if (ELIMINATE_COPY_RELOCS
4691 && !ppc_elf_hash_entry (h)->has_sda_refs
4692 && !htab->is_vxworks
4693 && !h->def_regular
4694 && !readonly_dynrelocs (h))
4695 {
4696 h->non_got_ref = 0;
4697 return TRUE;
4698 }
4699
4700 if (h->size == 0)
4701 {
4702 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4703 h->root.root.string);
4704 return TRUE;
4705 }
4706
4707 /* We must allocate the symbol in our .dynbss section, which will
4708 become part of the .bss section of the executable. There will be
4709 an entry for this symbol in the .dynsym section. The dynamic
4710 object will contain position independent code, so all references
4711 from the dynamic object to this symbol will go through the global
4712 offset table. The dynamic linker will use the .dynsym entry to
4713 determine the address it must put in the global offset table, so
4714 both the dynamic object and the regular object will refer to the
4715 same memory location for the variable.
4716
4717 Of course, if the symbol is referenced using SDAREL relocs, we
4718 must instead allocate it in .sbss. */
4719
4720 if (ppc_elf_hash_entry (h)->has_sda_refs)
4721 s = htab->dynsbss;
4722 else
4723 s = htab->dynbss;
4724 BFD_ASSERT (s != NULL);
4725
4726 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4727 copy the initial value out of the dynamic object and into the
4728 runtime process image. We need to remember the offset into the
4729 .rela.bss section we are going to use. */
4730 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4731 {
4732 asection *srel;
4733
4734 if (ppc_elf_hash_entry (h)->has_sda_refs)
4735 srel = htab->relsbss;
4736 else
4737 srel = htab->relbss;
4738 BFD_ASSERT (srel != NULL);
4739 srel->size += sizeof (Elf32_External_Rela);
4740 h->needs_copy = 1;
4741 }
4742
4743 return _bfd_elf_adjust_dynamic_copy (h, s);
4744 }
4745 \f
4746 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4747 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4748 specifying the addend on the plt relocation. For -fpic code, the sym
4749 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4750 xxxxxxxx.got2.plt_pic32.<callee>. */
4751
4752 static bfd_boolean
4753 add_stub_sym (struct plt_entry *ent,
4754 struct elf_link_hash_entry *h,
4755 struct bfd_link_info *info)
4756 {
4757 struct elf_link_hash_entry *sh;
4758 size_t len1, len2, len3;
4759 char *name;
4760 const char *stub;
4761 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4762
4763 if (info->shared || info->pie)
4764 stub = ".plt_pic32.";
4765 else
4766 stub = ".plt_call32.";
4767
4768 len1 = strlen (h->root.root.string);
4769 len2 = strlen (stub);
4770 len3 = 0;
4771 if (ent->sec)
4772 len3 = strlen (ent->sec->name);
4773 name = bfd_malloc (len1 + len2 + len3 + 9);
4774 if (name == NULL)
4775 return FALSE;
4776 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4777 if (ent->sec)
4778 memcpy (name + 8, ent->sec->name, len3);
4779 memcpy (name + 8 + len3, stub, len2);
4780 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4781 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4782 if (sh == NULL)
4783 return FALSE;
4784 if (sh->root.type == bfd_link_hash_new)
4785 {
4786 sh->root.type = bfd_link_hash_defined;
4787 sh->root.u.def.section = htab->glink;
4788 sh->root.u.def.value = ent->glink_offset;
4789 sh->ref_regular = 1;
4790 sh->def_regular = 1;
4791 sh->ref_regular_nonweak = 1;
4792 sh->forced_local = 1;
4793 sh->non_elf = 0;
4794 }
4795 return TRUE;
4796 }
4797
4798 /* Allocate NEED contiguous space in .got, and return the offset.
4799 Handles allocation of the got header when crossing 32k. */
4800
4801 static bfd_vma
4802 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4803 {
4804 bfd_vma where;
4805 unsigned int max_before_header;
4806
4807 if (htab->plt_type == PLT_VXWORKS)
4808 {
4809 where = htab->got->size;
4810 htab->got->size += need;
4811 }
4812 else
4813 {
4814 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4815 if (need <= htab->got_gap)
4816 {
4817 where = max_before_header - htab->got_gap;
4818 htab->got_gap -= need;
4819 }
4820 else
4821 {
4822 if (htab->got->size + need > max_before_header
4823 && htab->got->size <= max_before_header)
4824 {
4825 htab->got_gap = max_before_header - htab->got->size;
4826 htab->got->size = max_before_header + htab->got_header_size;
4827 }
4828 where = htab->got->size;
4829 htab->got->size += need;
4830 }
4831 }
4832 return where;
4833 }
4834
4835 /* Allocate space in associated reloc sections for dynamic relocs. */
4836
4837 static bfd_boolean
4838 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4839 {
4840 struct bfd_link_info *info = inf;
4841 struct ppc_elf_link_hash_entry *eh;
4842 struct ppc_elf_link_hash_table *htab;
4843 struct ppc_elf_dyn_relocs *p;
4844
4845 if (h->root.type == bfd_link_hash_indirect)
4846 return TRUE;
4847
4848 if (h->root.type == bfd_link_hash_warning)
4849 /* When warning symbols are created, they **replace** the "real"
4850 entry in the hash table, thus we never get to see the real
4851 symbol in a hash traversal. So look at it now. */
4852 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4853
4854 htab = ppc_elf_hash_table (info);
4855 if (htab->elf.dynamic_sections_created)
4856 {
4857 struct plt_entry *ent;
4858 bfd_boolean doneone = FALSE;
4859 bfd_vma plt_offset = 0, glink_offset = 0;
4860
4861 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4862 if (ent->plt.refcount > 0)
4863 {
4864 /* Make sure this symbol is output as a dynamic symbol. */
4865 if (h->dynindx == -1
4866 && !h->forced_local)
4867 {
4868 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4869 return FALSE;
4870 }
4871
4872 if (info->shared
4873 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4874 {
4875 asection *s = htab->plt;
4876
4877 if (htab->plt_type == PLT_NEW)
4878 {
4879 if (!doneone)
4880 {
4881 plt_offset = s->size;
4882 s->size += 4;
4883 }
4884 ent->plt.offset = plt_offset;
4885
4886 s = htab->glink;
4887 if (!doneone || info->shared || info->pie)
4888 {
4889 glink_offset = s->size;
4890 s->size += GLINK_ENTRY_SIZE;
4891 }
4892 if (!doneone
4893 && !info->shared
4894 && h->def_dynamic
4895 && !h->def_regular)
4896 {
4897 h->root.u.def.section = s;
4898 h->root.u.def.value = glink_offset;
4899 }
4900 ent->glink_offset = glink_offset;
4901
4902 if (htab->emit_stub_syms
4903 && !add_stub_sym (ent, h, info))
4904 return FALSE;
4905 }
4906 else
4907 {
4908 if (!doneone)
4909 {
4910 /* If this is the first .plt entry, make room
4911 for the special first entry. */
4912 if (s->size == 0)
4913 s->size += htab->plt_initial_entry_size;
4914
4915 /* The PowerPC PLT is actually composed of two
4916 parts, the first part is 2 words (for a load
4917 and a jump), and then there is a remaining
4918 word available at the end. */
4919 plt_offset = (htab->plt_initial_entry_size
4920 + (htab->plt_slot_size
4921 * ((s->size
4922 - htab->plt_initial_entry_size)
4923 / htab->plt_entry_size)));
4924
4925 /* If this symbol is not defined in a regular
4926 file, and we are not generating a shared
4927 library, then set the symbol to this location
4928 in the .plt. This is required to make
4929 function pointers compare as equal between
4930 the normal executable and the shared library. */
4931 if (! info->shared
4932 && h->def_dynamic
4933 && !h->def_regular)
4934 {
4935 h->root.u.def.section = s;
4936 h->root.u.def.value = plt_offset;
4937 }
4938
4939 /* Make room for this entry. */
4940 s->size += htab->plt_entry_size;
4941 /* After the 8192nd entry, room for two entries
4942 is allocated. */
4943 if (htab->plt_type == PLT_OLD
4944 && (s->size - htab->plt_initial_entry_size)
4945 / htab->plt_entry_size
4946 > PLT_NUM_SINGLE_ENTRIES)
4947 s->size += htab->plt_entry_size;
4948 }
4949 ent->plt.offset = plt_offset;
4950 }
4951
4952 /* We also need to make an entry in the .rela.plt section. */
4953 if (!doneone)
4954 {
4955 htab->relplt->size += sizeof (Elf32_External_Rela);
4956
4957 if (htab->plt_type == PLT_VXWORKS)
4958 {
4959 /* Allocate space for the unloaded relocations. */
4960 if (!info->shared)
4961 {
4962 if (ent->plt.offset
4963 == (bfd_vma) htab->plt_initial_entry_size)
4964 {
4965 htab->srelplt2->size
4966 += sizeof (Elf32_External_Rela)
4967 * VXWORKS_PLTRESOLVE_RELOCS;
4968 }
4969
4970 htab->srelplt2->size
4971 += sizeof (Elf32_External_Rela)
4972 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4973 }
4974
4975 /* Every PLT entry has an associated GOT entry in
4976 .got.plt. */
4977 htab->sgotplt->size += 4;
4978 }
4979 doneone = TRUE;
4980 }
4981 }
4982 else
4983 ent->plt.offset = (bfd_vma) -1;
4984 }
4985 else
4986 ent->plt.offset = (bfd_vma) -1;
4987
4988 if (!doneone)
4989 {
4990 h->plt.plist = NULL;
4991 h->needs_plt = 0;
4992 }
4993 }
4994 else
4995 {
4996 h->plt.plist = NULL;
4997 h->needs_plt = 0;
4998 }
4999
5000 eh = (struct ppc_elf_link_hash_entry *) h;
5001 if (eh->elf.got.refcount > 0)
5002 {
5003 bfd_boolean dyn;
5004 unsigned int need;
5005
5006 /* Make sure this symbol is output as a dynamic symbol. */
5007 if (eh->elf.dynindx == -1
5008 && !eh->elf.forced_local
5009 && htab->elf.dynamic_sections_created)
5010 {
5011 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5012 return FALSE;
5013 }
5014
5015 need = 0;
5016 if ((eh->tls_mask & TLS_TLS) != 0)
5017 {
5018 if ((eh->tls_mask & TLS_LD) != 0)
5019 {
5020 if (!eh->elf.def_dynamic)
5021 /* We'll just use htab->tlsld_got.offset. This should
5022 always be the case. It's a little odd if we have
5023 a local dynamic reloc against a non-local symbol. */
5024 htab->tlsld_got.refcount += 1;
5025 else
5026 need += 8;
5027 }
5028 if ((eh->tls_mask & TLS_GD) != 0)
5029 need += 8;
5030 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5031 need += 4;
5032 if ((eh->tls_mask & TLS_DTPREL) != 0)
5033 need += 4;
5034 }
5035 else
5036 need += 4;
5037 if (need == 0)
5038 eh->elf.got.offset = (bfd_vma) -1;
5039 else
5040 {
5041 eh->elf.got.offset = allocate_got (htab, need);
5042 dyn = htab->elf.dynamic_sections_created;
5043 if ((info->shared
5044 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5045 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5046 || eh->elf.root.type != bfd_link_hash_undefweak))
5047 {
5048 /* All the entries we allocated need relocs.
5049 Except LD only needs one. */
5050 if ((eh->tls_mask & TLS_LD) != 0
5051 && eh->elf.def_dynamic)
5052 need -= 4;
5053 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5054 }
5055 }
5056 }
5057 else
5058 eh->elf.got.offset = (bfd_vma) -1;
5059
5060 if (eh->dyn_relocs == NULL
5061 || !htab->elf.dynamic_sections_created)
5062 return TRUE;
5063
5064 /* In the shared -Bsymbolic case, discard space allocated for
5065 dynamic pc-relative relocs against symbols which turn out to be
5066 defined in regular objects. For the normal shared case, discard
5067 space for relocs that have become local due to symbol visibility
5068 changes. */
5069
5070 if (info->shared)
5071 {
5072 /* Relocs that use pc_count are those that appear on a call insn,
5073 or certain REL relocs (see must_be_dyn_reloc) that can be
5074 generated via assembly. We want calls to protected symbols to
5075 resolve directly to the function rather than going via the plt.
5076 If people want function pointer comparisons to work as expected
5077 then they should avoid writing weird assembly. */
5078 if (SYMBOL_CALLS_LOCAL (info, h))
5079 {
5080 struct ppc_elf_dyn_relocs **pp;
5081
5082 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5083 {
5084 p->count -= p->pc_count;
5085 p->pc_count = 0;
5086 if (p->count == 0)
5087 *pp = p->next;
5088 else
5089 pp = &p->next;
5090 }
5091 }
5092
5093 if (htab->is_vxworks)
5094 {
5095 struct ppc_elf_dyn_relocs **pp;
5096
5097 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5098 {
5099 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5100 *pp = p->next;
5101 else
5102 pp = &p->next;
5103 }
5104 }
5105
5106 /* Discard relocs on undefined symbols that must be local. */
5107 if (eh->dyn_relocs != NULL
5108 && h->root.type == bfd_link_hash_undefined
5109 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5110 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5111 eh->dyn_relocs = NULL;
5112
5113 /* Also discard relocs on undefined weak syms with non-default
5114 visibility. */
5115 if (eh->dyn_relocs != NULL
5116 && h->root.type == bfd_link_hash_undefweak)
5117 {
5118 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5119 eh->dyn_relocs = NULL;
5120
5121 /* Make sure undefined weak symbols are output as a dynamic
5122 symbol in PIEs. */
5123 else if (h->dynindx == -1
5124 && !h->forced_local)
5125 {
5126 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5127 return FALSE;
5128 }
5129 }
5130 }
5131 else if (ELIMINATE_COPY_RELOCS)
5132 {
5133 /* For the non-shared case, discard space for relocs against
5134 symbols which turn out to need copy relocs or are not
5135 dynamic. */
5136
5137 if (!h->non_got_ref
5138 && !h->def_regular)
5139 {
5140 /* Make sure this symbol is output as a dynamic symbol.
5141 Undefined weak syms won't yet be marked as dynamic. */
5142 if (h->dynindx == -1
5143 && !h->forced_local)
5144 {
5145 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5146 return FALSE;
5147 }
5148
5149 /* If that succeeded, we know we'll be keeping all the
5150 relocs. */
5151 if (h->dynindx != -1)
5152 goto keep;
5153 }
5154
5155 eh->dyn_relocs = NULL;
5156
5157 keep: ;
5158 }
5159
5160 /* Finally, allocate space. */
5161 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5162 {
5163 asection *sreloc = elf_section_data (p->sec)->sreloc;
5164 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5165 }
5166
5167 return TRUE;
5168 }
5169
5170 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5171 read-only sections. */
5172
5173 static bfd_boolean
5174 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5175 {
5176 if (h->root.type == bfd_link_hash_indirect)
5177 return TRUE;
5178
5179 if (h->root.type == bfd_link_hash_warning)
5180 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5181
5182 if (readonly_dynrelocs (h))
5183 {
5184 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5185
5186 /* Not an error, just cut short the traversal. */
5187 return FALSE;
5188 }
5189 return TRUE;
5190 }
5191
5192 /* Set the sizes of the dynamic sections. */
5193
5194 static bfd_boolean
5195 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5196 struct bfd_link_info *info)
5197 {
5198 struct ppc_elf_link_hash_table *htab;
5199 asection *s;
5200 bfd_boolean relocs;
5201 bfd *ibfd;
5202
5203 #ifdef DEBUG
5204 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5205 #endif
5206
5207 htab = ppc_elf_hash_table (info);
5208 BFD_ASSERT (htab->elf.dynobj != NULL);
5209
5210 if (elf_hash_table (info)->dynamic_sections_created)
5211 {
5212 /* Set the contents of the .interp section to the interpreter. */
5213 if (info->executable)
5214 {
5215 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5216 BFD_ASSERT (s != NULL);
5217 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5218 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5219 }
5220 }
5221
5222 if (htab->plt_type == PLT_OLD)
5223 htab->got_header_size = 16;
5224 else if (htab->plt_type == PLT_NEW)
5225 htab->got_header_size = 12;
5226
5227 /* Set up .got offsets for local syms, and space for local dynamic
5228 relocs. */
5229 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5230 {
5231 bfd_signed_vma *local_got;
5232 bfd_signed_vma *end_local_got;
5233 char *lgot_masks;
5234 bfd_size_type locsymcount;
5235 Elf_Internal_Shdr *symtab_hdr;
5236
5237 if (!is_ppc_elf (ibfd))
5238 continue;
5239
5240 for (s = ibfd->sections; s != NULL; s = s->next)
5241 {
5242 struct ppc_elf_dyn_relocs *p;
5243
5244 for (p = ((struct ppc_elf_dyn_relocs *)
5245 elf_section_data (s)->local_dynrel);
5246 p != NULL;
5247 p = p->next)
5248 {
5249 if (!bfd_is_abs_section (p->sec)
5250 && bfd_is_abs_section (p->sec->output_section))
5251 {
5252 /* Input section has been discarded, either because
5253 it is a copy of a linkonce section or due to
5254 linker script /DISCARD/, so we'll be discarding
5255 the relocs too. */
5256 }
5257 else if (htab->is_vxworks
5258 && strcmp (p->sec->output_section->name,
5259 ".tls_vars") == 0)
5260 {
5261 /* Relocations in vxworks .tls_vars sections are
5262 handled specially by the loader. */
5263 }
5264 else if (p->count != 0)
5265 {
5266 elf_section_data (p->sec)->sreloc->size
5267 += p->count * sizeof (Elf32_External_Rela);
5268 if ((p->sec->output_section->flags
5269 & (SEC_READONLY | SEC_ALLOC))
5270 == (SEC_READONLY | SEC_ALLOC))
5271 info->flags |= DF_TEXTREL;
5272 }
5273 }
5274 }
5275
5276 local_got = elf_local_got_refcounts (ibfd);
5277 if (!local_got)
5278 continue;
5279
5280 symtab_hdr = &elf_symtab_hdr (ibfd);
5281 locsymcount = symtab_hdr->sh_info;
5282 end_local_got = local_got + locsymcount;
5283 lgot_masks = (char *) end_local_got;
5284 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5285 if (*local_got > 0)
5286 {
5287 unsigned int need = 0;
5288 if ((*lgot_masks & TLS_TLS) != 0)
5289 {
5290 if ((*lgot_masks & TLS_GD) != 0)
5291 need += 8;
5292 if ((*lgot_masks & TLS_LD) != 0)
5293 htab->tlsld_got.refcount += 1;
5294 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5295 need += 4;
5296 if ((*lgot_masks & TLS_DTPREL) != 0)
5297 need += 4;
5298 }
5299 else
5300 need += 4;
5301 if (need == 0)
5302 *local_got = (bfd_vma) -1;
5303 else
5304 {
5305 *local_got = allocate_got (htab, need);
5306 if (info->shared)
5307 htab->relgot->size += (need
5308 * (sizeof (Elf32_External_Rela) / 4));
5309 }
5310 }
5311 else
5312 *local_got = (bfd_vma) -1;
5313 }
5314
5315 /* Allocate space for global sym dynamic relocs. */
5316 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5317
5318 if (htab->tlsld_got.refcount > 0)
5319 {
5320 htab->tlsld_got.offset = allocate_got (htab, 8);
5321 if (info->shared)
5322 htab->relgot->size += sizeof (Elf32_External_Rela);
5323 }
5324 else
5325 htab->tlsld_got.offset = (bfd_vma) -1;
5326
5327 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5328 {
5329 unsigned int g_o_t = 32768;
5330
5331 /* If we haven't allocated the header, do so now. When we get here,
5332 for old plt/got the got size will be 0 to 32764 (not allocated),
5333 or 32780 to 65536 (header allocated). For new plt/got, the
5334 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5335 if (htab->got->size <= 32768)
5336 {
5337 g_o_t = htab->got->size;
5338 if (htab->plt_type == PLT_OLD)
5339 g_o_t += 4;
5340 htab->got->size += htab->got_header_size;
5341 }
5342
5343 htab->elf.hgot->root.u.def.value = g_o_t;
5344 }
5345
5346 if (htab->glink != NULL && htab->glink->size != 0)
5347 {
5348 htab->glink_pltresolve = htab->glink->size;
5349 /* Space for the branch table. */
5350 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5351 /* Pad out to align the start of PLTresolve. */
5352 htab->glink->size += -htab->glink->size & 15;
5353 htab->glink->size += GLINK_PLTRESOLVE;
5354
5355 if (htab->emit_stub_syms)
5356 {
5357 struct elf_link_hash_entry *sh;
5358 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5359 TRUE, FALSE, FALSE);
5360 if (sh == NULL)
5361 return FALSE;
5362 if (sh->root.type == bfd_link_hash_new)
5363 {
5364 sh->root.type = bfd_link_hash_defined;
5365 sh->root.u.def.section = htab->glink;
5366 sh->root.u.def.value = htab->glink_pltresolve;
5367 sh->ref_regular = 1;
5368 sh->def_regular = 1;
5369 sh->ref_regular_nonweak = 1;
5370 sh->forced_local = 1;
5371 sh->non_elf = 0;
5372 }
5373 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5374 TRUE, FALSE, FALSE);
5375 if (sh == NULL)
5376 return FALSE;
5377 if (sh->root.type == bfd_link_hash_new)
5378 {
5379 sh->root.type = bfd_link_hash_defined;
5380 sh->root.u.def.section = htab->glink;
5381 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5382 sh->ref_regular = 1;
5383 sh->def_regular = 1;
5384 sh->ref_regular_nonweak = 1;
5385 sh->forced_local = 1;
5386 sh->non_elf = 0;
5387 }
5388 }
5389 }
5390
5391 /* We've now determined the sizes of the various dynamic sections.
5392 Allocate memory for them. */
5393 relocs = FALSE;
5394 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5395 {
5396 bfd_boolean strip_section = TRUE;
5397
5398 if ((s->flags & SEC_LINKER_CREATED) == 0)
5399 continue;
5400
5401 if (s == htab->plt
5402 || s == htab->glink
5403 || s == htab->got
5404 || s == htab->sgotplt
5405 || s == htab->sbss
5406 || s == htab->dynbss
5407 || s == htab->dynsbss)
5408 {
5409 /* We'd like to strip these sections if they aren't needed, but if
5410 we've exported dynamic symbols from them we must leave them.
5411 It's too late to tell BFD to get rid of the symbols. */
5412 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5413 strip_section = FALSE;
5414 /* Strip this section if we don't need it; see the
5415 comment below. */
5416 }
5417 else if (s == htab->sdata[0].section
5418 || s == htab->sdata[1].section)
5419 {
5420 /* Strip these too. */
5421 }
5422 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5423 {
5424 if (s->size != 0)
5425 {
5426 /* Remember whether there are any relocation sections. */
5427 relocs = TRUE;
5428
5429 /* We use the reloc_count field as a counter if we need
5430 to copy relocs into the output file. */
5431 s->reloc_count = 0;
5432 }
5433 }
5434 else
5435 {
5436 /* It's not one of our sections, so don't allocate space. */
5437 continue;
5438 }
5439
5440 if (s->size == 0 && strip_section)
5441 {
5442 /* If we don't need this section, strip it from the
5443 output file. This is mostly to handle .rela.bss and
5444 .rela.plt. We must create both sections in
5445 create_dynamic_sections, because they must be created
5446 before the linker maps input sections to output
5447 sections. The linker does that before
5448 adjust_dynamic_symbol is called, and it is that
5449 function which decides whether anything needs to go
5450 into these sections. */
5451 s->flags |= SEC_EXCLUDE;
5452 continue;
5453 }
5454
5455 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5456 continue;
5457
5458 /* Allocate memory for the section contents. */
5459 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5460 if (s->contents == NULL)
5461 return FALSE;
5462 }
5463
5464 if (htab->elf.dynamic_sections_created)
5465 {
5466 /* Add some entries to the .dynamic section. We fill in the
5467 values later, in ppc_elf_finish_dynamic_sections, but we
5468 must add the entries now so that we get the correct size for
5469 the .dynamic section. The DT_DEBUG entry is filled in by the
5470 dynamic linker and used by the debugger. */
5471 #define add_dynamic_entry(TAG, VAL) \
5472 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5473
5474 if (info->executable)
5475 {
5476 if (!add_dynamic_entry (DT_DEBUG, 0))
5477 return FALSE;
5478 }
5479
5480 if (htab->plt != NULL && htab->plt->size != 0)
5481 {
5482 if (!add_dynamic_entry (DT_PLTGOT, 0)
5483 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5484 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5485 || !add_dynamic_entry (DT_JMPREL, 0))
5486 return FALSE;
5487 }
5488
5489 if (htab->glink != NULL && htab->glink->size != 0)
5490 {
5491 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5492 return FALSE;
5493 }
5494
5495 if (relocs)
5496 {
5497 if (!add_dynamic_entry (DT_RELA, 0)
5498 || !add_dynamic_entry (DT_RELASZ, 0)
5499 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5500 return FALSE;
5501 }
5502
5503 /* If any dynamic relocs apply to a read-only section, then we
5504 need a DT_TEXTREL entry. */
5505 if ((info->flags & DF_TEXTREL) == 0)
5506 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5507 info);
5508
5509 if ((info->flags & DF_TEXTREL) != 0)
5510 {
5511 if (!add_dynamic_entry (DT_TEXTREL, 0))
5512 return FALSE;
5513 }
5514 if (htab->is_vxworks
5515 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5516 return FALSE;
5517 }
5518 #undef add_dynamic_entry
5519
5520 return TRUE;
5521 }
5522
5523 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5524
5525 static bfd_boolean
5526 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5527 {
5528 if (h->plt.plist != NULL
5529 && !h->def_regular
5530 && (!h->pointer_equality_needed
5531 || !h->ref_regular_nonweak))
5532 return FALSE;
5533
5534 return _bfd_elf_hash_symbol (h);
5535 }
5536 \f
5537 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5538
5539 static const int shared_stub_entry[] =
5540 {
5541 0x7c0802a6, /* mflr 0 */
5542 0x429f0005, /* bcl 20, 31, .Lxxx */
5543 0x7d6802a6, /* mflr 11 */
5544 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5545 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5546 0x7c0803a6, /* mtlr 0 */
5547 0x7d6903a6, /* mtctr 11 */
5548 0x4e800420, /* bctr */
5549 };
5550
5551 static const int stub_entry[] =
5552 {
5553 0x3d600000, /* lis 11,xxx@ha */
5554 0x396b0000, /* addi 11,11,xxx@l */
5555 0x7d6903a6, /* mtctr 11 */
5556 0x4e800420, /* bctr */
5557 };
5558
5559 static bfd_boolean
5560 ppc_elf_relax_section (bfd *abfd,
5561 asection *isec,
5562 struct bfd_link_info *link_info,
5563 bfd_boolean *again)
5564 {
5565 struct one_fixup
5566 {
5567 struct one_fixup *next;
5568 asection *tsec;
5569 bfd_vma toff;
5570 bfd_vma trampoff;
5571 };
5572
5573 Elf_Internal_Shdr *symtab_hdr;
5574 bfd_byte *contents = NULL;
5575 Elf_Internal_Sym *isymbuf = NULL;
5576 Elf_Internal_Rela *internal_relocs = NULL;
5577 Elf_Internal_Rela *irel, *irelend;
5578 struct one_fixup *fixups = NULL;
5579 bfd_boolean changed;
5580 struct ppc_elf_link_hash_table *htab;
5581 bfd_size_type trampoff;
5582 asection *got2;
5583
5584 *again = FALSE;
5585
5586 /* Nothing to do if there are no relocations, and no need to do
5587 anything with non-alloc sections. */
5588 if ((isec->flags & SEC_ALLOC) == 0
5589 || (isec->flags & SEC_RELOC) == 0
5590 || isec->reloc_count == 0)
5591 return TRUE;
5592
5593 trampoff = (isec->size + 3) & (bfd_vma) -4;
5594 /* Space for a branch around any trampolines. */
5595 trampoff += 4;
5596
5597 symtab_hdr = &elf_symtab_hdr (abfd);
5598
5599 /* Get a copy of the native relocations. */
5600 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5601 link_info->keep_memory);
5602 if (internal_relocs == NULL)
5603 goto error_return;
5604
5605 htab = ppc_elf_hash_table (link_info);
5606 got2 = bfd_get_section_by_name (abfd, ".got2");
5607
5608 irelend = internal_relocs + isec->reloc_count;
5609 for (irel = internal_relocs; irel < irelend; irel++)
5610 {
5611 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5612 bfd_vma symaddr, reladdr, toff, roff;
5613 asection *tsec;
5614 struct one_fixup *f;
5615 size_t insn_offset = 0;
5616 bfd_vma max_branch_offset, val;
5617 bfd_byte *hit_addr;
5618 unsigned long t0;
5619 unsigned char sym_type;
5620
5621 switch (r_type)
5622 {
5623 case R_PPC_REL24:
5624 case R_PPC_LOCAL24PC:
5625 case R_PPC_PLTREL24:
5626 max_branch_offset = 1 << 25;
5627 break;
5628
5629 case R_PPC_REL14:
5630 case R_PPC_REL14_BRTAKEN:
5631 case R_PPC_REL14_BRNTAKEN:
5632 max_branch_offset = 1 << 15;
5633 break;
5634
5635 default:
5636 continue;
5637 }
5638
5639 /* Get the value of the symbol referred to by the reloc. */
5640 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5641 {
5642 /* A local symbol. */
5643 Elf_Internal_Sym *isym;
5644
5645 /* Read this BFD's local symbols. */
5646 if (isymbuf == NULL)
5647 {
5648 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5649 if (isymbuf == NULL)
5650 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5651 symtab_hdr->sh_info, 0,
5652 NULL, NULL, NULL);
5653 if (isymbuf == 0)
5654 goto error_return;
5655 }
5656 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5657 if (isym->st_shndx == SHN_UNDEF)
5658 continue; /* We can't do anything with undefined symbols. */
5659 else if (isym->st_shndx == SHN_ABS)
5660 tsec = bfd_abs_section_ptr;
5661 else if (isym->st_shndx == SHN_COMMON)
5662 tsec = bfd_com_section_ptr;
5663 else
5664 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5665
5666 toff = isym->st_value;
5667 sym_type = ELF_ST_TYPE (isym->st_info);
5668 }
5669 else
5670 {
5671 /* Global symbol handling. */
5672 unsigned long indx;
5673 struct elf_link_hash_entry *h;
5674
5675 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5676 h = elf_sym_hashes (abfd)[indx];
5677
5678 while (h->root.type == bfd_link_hash_indirect
5679 || h->root.type == bfd_link_hash_warning)
5680 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5681
5682 tsec = NULL;
5683 toff = 0;
5684 if (r_type == R_PPC_PLTREL24
5685 && htab->plt != NULL)
5686 {
5687 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5688
5689 if (ent != NULL)
5690 {
5691 if (htab->plt_type == PLT_NEW)
5692 {
5693 tsec = htab->glink;
5694 toff = ent->glink_offset;
5695 }
5696 else
5697 {
5698 tsec = htab->plt;
5699 toff = ent->plt.offset;
5700 }
5701 }
5702 }
5703 if (tsec != NULL)
5704 ;
5705 else if (h->root.type == bfd_link_hash_defined
5706 || h->root.type == bfd_link_hash_defweak)
5707 {
5708 tsec = h->root.u.def.section;
5709 toff = h->root.u.def.value;
5710 }
5711 else
5712 continue;
5713
5714 sym_type = h->type;
5715 }
5716
5717 /* If the branch and target are in the same section, you have
5718 no hope of adding stubs. We'll error out later should the
5719 branch overflow. */
5720 if (tsec == isec)
5721 continue;
5722
5723 /* There probably isn't any reason to handle symbols in
5724 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5725 attribute for a code section, and we are only looking at
5726 branches. However, implement it correctly here as a
5727 reference for other target relax_section functions. */
5728 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5729 {
5730 /* At this stage in linking, no SEC_MERGE symbol has been
5731 adjusted, so all references to such symbols need to be
5732 passed through _bfd_merged_section_offset. (Later, in
5733 relocate_section, all SEC_MERGE symbols *except* for
5734 section symbols have been adjusted.)
5735
5736 gas may reduce relocations against symbols in SEC_MERGE
5737 sections to a relocation against the section symbol when
5738 the original addend was zero. When the reloc is against
5739 a section symbol we should include the addend in the
5740 offset passed to _bfd_merged_section_offset, since the
5741 location of interest is the original symbol. On the
5742 other hand, an access to "sym+addend" where "sym" is not
5743 a section symbol should not include the addend; Such an
5744 access is presumed to be an offset from "sym"; The
5745 location of interest is just "sym". */
5746 if (sym_type == STT_SECTION)
5747 toff += irel->r_addend;
5748
5749 toff = _bfd_merged_section_offset (abfd, &tsec,
5750 elf_section_data (tsec)->sec_info,
5751 toff);
5752
5753 if (sym_type != STT_SECTION)
5754 toff += irel->r_addend;
5755 }
5756 /* PLTREL24 addends are special. */
5757 else if (r_type != R_PPC_PLTREL24)
5758 toff += irel->r_addend;
5759
5760 /* Attempted -shared link of non-pic code loses. */
5761 if (tsec->output_section == NULL)
5762 continue;
5763
5764 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5765
5766 roff = irel->r_offset;
5767 reladdr = isec->output_section->vma + isec->output_offset + roff;
5768
5769 /* If the branch is in range, no need to do anything. */
5770 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5771 continue;
5772
5773 /* Look for an existing fixup to this address. */
5774 for (f = fixups; f ; f = f->next)
5775 if (f->tsec == tsec && f->toff == toff)
5776 break;
5777
5778 if (f == NULL)
5779 {
5780 size_t size;
5781 unsigned long stub_rtype;
5782
5783 val = trampoff - roff;
5784 if (val >= max_branch_offset)
5785 /* Oh dear, we can't reach a trampoline. Don't try to add
5786 one. We'll report an error later. */
5787 continue;
5788
5789 if (link_info->shared)
5790 {
5791 size = 4 * ARRAY_SIZE (shared_stub_entry);
5792 insn_offset = 12;
5793 stub_rtype = R_PPC_RELAX32PC;
5794 }
5795 else
5796 {
5797 size = 4 * ARRAY_SIZE (stub_entry);
5798 insn_offset = 0;
5799 stub_rtype = R_PPC_RELAX32;
5800 }
5801
5802 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5803 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5804 abort ();
5805 if (tsec == htab->plt
5806 || tsec == htab->glink)
5807 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5808
5809 /* Hijack the old relocation. Since we need two
5810 relocations for this use a "composite" reloc. */
5811 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5812 stub_rtype);
5813 irel->r_offset = trampoff + insn_offset;
5814 if (r_type == R_PPC_PLTREL24)
5815 irel->r_addend = 0;
5816
5817 /* Record the fixup so we don't do it again this section. */
5818 f = bfd_malloc (sizeof (*f));
5819 f->next = fixups;
5820 f->tsec = tsec;
5821 f->toff = toff;
5822 f->trampoff = trampoff;
5823 fixups = f;
5824
5825 trampoff += size;
5826 }
5827 else
5828 {
5829 val = f->trampoff - roff;
5830 if (val >= max_branch_offset)
5831 continue;
5832
5833 /* Nop out the reloc, since we're finalizing things here. */
5834 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5835 }
5836
5837 /* Get the section contents. */
5838 if (contents == NULL)
5839 {
5840 /* Get cached copy if it exists. */
5841 if (elf_section_data (isec)->this_hdr.contents != NULL)
5842 contents = elf_section_data (isec)->this_hdr.contents;
5843 else
5844 {
5845 /* Go get them off disk. */
5846 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5847 goto error_return;
5848 }
5849 }
5850
5851 /* Fix up the existing branch to hit the trampoline. */
5852 hit_addr = contents + roff;
5853 switch (r_type)
5854 {
5855 case R_PPC_REL24:
5856 case R_PPC_LOCAL24PC:
5857 case R_PPC_PLTREL24:
5858 t0 = bfd_get_32 (abfd, hit_addr);
5859 t0 &= ~0x3fffffc;
5860 t0 |= val & 0x3fffffc;
5861 bfd_put_32 (abfd, t0, hit_addr);
5862 break;
5863
5864 case R_PPC_REL14:
5865 case R_PPC_REL14_BRTAKEN:
5866 case R_PPC_REL14_BRNTAKEN:
5867 t0 = bfd_get_32 (abfd, hit_addr);
5868 t0 &= ~0xfffc;
5869 t0 |= val & 0xfffc;
5870 bfd_put_32 (abfd, t0, hit_addr);
5871 break;
5872 }
5873 }
5874
5875 /* Write out the trampolines. */
5876 changed = fixups != NULL;
5877 if (fixups != NULL)
5878 {
5879 const int *stub;
5880 bfd_byte *dest;
5881 bfd_vma val;
5882 int i, size;
5883
5884 do
5885 {
5886 struct one_fixup *f = fixups;
5887 fixups = fixups->next;
5888 free (f);
5889 }
5890 while (fixups);
5891
5892 contents = bfd_realloc_or_free (contents, trampoff);
5893 if (contents == NULL)
5894 goto error_return;
5895
5896 isec->size = (isec->size + 3) & (bfd_vma) -4;
5897 /* Branch around the trampolines. */
5898 val = B + trampoff - isec->size;
5899 dest = contents + isec->size;
5900 isec->size = trampoff;
5901 bfd_put_32 (abfd, val, dest);
5902 dest += 4;
5903
5904 if (link_info->shared)
5905 {
5906 stub = shared_stub_entry;
5907 size = ARRAY_SIZE (shared_stub_entry);
5908 }
5909 else
5910 {
5911 stub = stub_entry;
5912 size = ARRAY_SIZE (stub_entry);
5913 }
5914
5915 i = 0;
5916 while (dest < contents + trampoff)
5917 {
5918 bfd_put_32 (abfd, stub[i], dest);
5919 i++;
5920 if (i == size)
5921 i = 0;
5922 dest += 4;
5923 }
5924 BFD_ASSERT (i == 0);
5925 }
5926
5927 if (isymbuf != NULL
5928 && symtab_hdr->contents != (unsigned char *) isymbuf)
5929 {
5930 if (! link_info->keep_memory)
5931 free (isymbuf);
5932 else
5933 {
5934 /* Cache the symbols for elf_link_input_bfd. */
5935 symtab_hdr->contents = (unsigned char *) isymbuf;
5936 }
5937 }
5938
5939 if (contents != NULL
5940 && elf_section_data (isec)->this_hdr.contents != contents)
5941 {
5942 if (!changed && !link_info->keep_memory)
5943 free (contents);
5944 else
5945 {
5946 /* Cache the section contents for elf_link_input_bfd. */
5947 elf_section_data (isec)->this_hdr.contents = contents;
5948 }
5949 }
5950
5951 if (elf_section_data (isec)->relocs != internal_relocs)
5952 {
5953 if (!changed)
5954 free (internal_relocs);
5955 else
5956 elf_section_data (isec)->relocs = internal_relocs;
5957 }
5958
5959 *again = changed;
5960 return TRUE;
5961
5962 error_return:
5963 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5964 free (isymbuf);
5965 if (contents != NULL
5966 && elf_section_data (isec)->this_hdr.contents != contents)
5967 free (contents);
5968 if (internal_relocs != NULL
5969 && elf_section_data (isec)->relocs != internal_relocs)
5970 free (internal_relocs);
5971 return FALSE;
5972 }
5973 \f
5974 /* What to do when ld finds relocations against symbols defined in
5975 discarded sections. */
5976
5977 static unsigned int
5978 ppc_elf_action_discarded (asection *sec)
5979 {
5980 if (strcmp (".fixup", sec->name) == 0)
5981 return 0;
5982
5983 if (strcmp (".got2", sec->name) == 0)
5984 return 0;
5985
5986 return _bfd_elf_default_action_discarded (sec);
5987 }
5988 \f
5989 /* Fill in the address for a pointer generated in a linker section. */
5990
5991 static bfd_vma
5992 elf_finish_pointer_linker_section (bfd *input_bfd,
5993 elf_linker_section_t *lsect,
5994 struct elf_link_hash_entry *h,
5995 bfd_vma relocation,
5996 const Elf_Internal_Rela *rel)
5997 {
5998 elf_linker_section_pointers_t *linker_section_ptr;
5999
6000 BFD_ASSERT (lsect != NULL);
6001
6002 if (h != NULL)
6003 {
6004 /* Handle global symbol. */
6005 struct ppc_elf_link_hash_entry *eh;
6006
6007 eh = (struct ppc_elf_link_hash_entry *) h;
6008 BFD_ASSERT (eh->elf.def_regular);
6009 linker_section_ptr = eh->linker_section_pointer;
6010 }
6011 else
6012 {
6013 /* Handle local symbol. */
6014 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6015
6016 BFD_ASSERT (is_ppc_elf (input_bfd));
6017 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6018 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6019 }
6020
6021 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6022 rel->r_addend,
6023 lsect);
6024 BFD_ASSERT (linker_section_ptr != NULL);
6025
6026 /* Offset will always be a multiple of four, so use the bottom bit
6027 as a "written" flag. */
6028 if ((linker_section_ptr->offset & 1) == 0)
6029 {
6030 bfd_put_32 (lsect->section->owner,
6031 relocation + linker_section_ptr->addend,
6032 lsect->section->contents + linker_section_ptr->offset);
6033 linker_section_ptr->offset += 1;
6034 }
6035
6036 relocation = (lsect->section->output_offset
6037 + linker_section_ptr->offset - 1
6038 - 0x8000);
6039
6040 #ifdef DEBUG
6041 fprintf (stderr,
6042 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6043 lsect->name, (long) relocation, (long) relocation);
6044 #endif
6045
6046 /* Subtract out the addend, because it will get added back in by the normal
6047 processing. */
6048 return relocation - linker_section_ptr->addend;
6049 }
6050
6051 /* The RELOCATE_SECTION function is called by the ELF backend linker
6052 to handle the relocations for a section.
6053
6054 The relocs are always passed as Rela structures; if the section
6055 actually uses Rel structures, the r_addend field will always be
6056 zero.
6057
6058 This function is responsible for adjust the section contents as
6059 necessary, and (if using Rela relocs and generating a
6060 relocatable output file) adjusting the reloc addend as
6061 necessary.
6062
6063 This function does not have to worry about setting the reloc
6064 address or the reloc symbol index.
6065
6066 LOCAL_SYMS is a pointer to the swapped in local symbols.
6067
6068 LOCAL_SECTIONS is an array giving the section in the input file
6069 corresponding to the st_shndx field of each local symbol.
6070
6071 The global hash table entry for the global symbols can be found
6072 via elf_sym_hashes (input_bfd).
6073
6074 When generating relocatable output, this function must handle
6075 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6076 going to be the section symbol corresponding to the output
6077 section, which means that the addend must be adjusted
6078 accordingly. */
6079
6080 static bfd_boolean
6081 ppc_elf_relocate_section (bfd *output_bfd,
6082 struct bfd_link_info *info,
6083 bfd *input_bfd,
6084 asection *input_section,
6085 bfd_byte *contents,
6086 Elf_Internal_Rela *relocs,
6087 Elf_Internal_Sym *local_syms,
6088 asection **local_sections)
6089 {
6090 Elf_Internal_Shdr *symtab_hdr;
6091 struct elf_link_hash_entry **sym_hashes;
6092 struct ppc_elf_link_hash_table *htab;
6093 Elf_Internal_Rela *rel;
6094 Elf_Internal_Rela *relend;
6095 Elf_Internal_Rela outrel;
6096 bfd_byte *loc;
6097 asection *got2, *sreloc = NULL;
6098 bfd_vma *local_got_offsets;
6099 bfd_boolean ret = TRUE;
6100 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6101 bfd_boolean is_vxworks_tls;
6102
6103 #ifdef DEBUG
6104 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6105 "%ld relocations%s",
6106 input_bfd, input_section,
6107 (long) input_section->reloc_count,
6108 (info->relocatable) ? " (relocatable)" : "");
6109 #endif
6110
6111 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6112
6113 /* Initialize howto table if not already done. */
6114 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6115 ppc_elf_howto_init ();
6116
6117 htab = ppc_elf_hash_table (info);
6118 local_got_offsets = elf_local_got_offsets (input_bfd);
6119 symtab_hdr = &elf_symtab_hdr (input_bfd);
6120 sym_hashes = elf_sym_hashes (input_bfd);
6121 /* We have to handle relocations in vxworks .tls_vars sections
6122 specially, because the dynamic loader is 'weird'. */
6123 is_vxworks_tls = (htab->is_vxworks && info->shared
6124 && !strcmp (input_section->output_section->name,
6125 ".tls_vars"));
6126 rel = relocs;
6127 relend = relocs + input_section->reloc_count;
6128 for (; rel < relend; rel++)
6129 {
6130 enum elf_ppc_reloc_type r_type;
6131 bfd_vma addend;
6132 bfd_reloc_status_type r;
6133 Elf_Internal_Sym *sym;
6134 asection *sec;
6135 struct elf_link_hash_entry *h;
6136 const char *sym_name;
6137 reloc_howto_type *howto;
6138 unsigned long r_symndx;
6139 bfd_vma relocation;
6140 bfd_vma branch_bit, insn, from;
6141 bfd_boolean unresolved_reloc;
6142 bfd_boolean warned;
6143 unsigned int tls_type, tls_mask, tls_gd;
6144
6145 r_type = ELF32_R_TYPE (rel->r_info);
6146 sym = NULL;
6147 sec = NULL;
6148 h = NULL;
6149 unresolved_reloc = FALSE;
6150 warned = FALSE;
6151 r_symndx = ELF32_R_SYM (rel->r_info);
6152
6153 if (r_symndx < symtab_hdr->sh_info)
6154 {
6155 sym = local_syms + r_symndx;
6156 sec = local_sections[r_symndx];
6157 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6158
6159 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6160 }
6161 else
6162 {
6163 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6164 r_symndx, symtab_hdr, sym_hashes,
6165 h, sec, relocation,
6166 unresolved_reloc, warned);
6167
6168 sym_name = h->root.root.string;
6169 }
6170
6171 if (sec != NULL && elf_discarded_section (sec))
6172 {
6173 /* For relocs against symbols from removed linkonce sections,
6174 or sections discarded by a linker script, we just want the
6175 section contents zeroed. Avoid any special processing. */
6176 howto = NULL;
6177 if (r_type < R_PPC_max)
6178 howto = ppc_elf_howto_table[r_type];
6179 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6180 rel->r_info = 0;
6181 rel->r_addend = 0;
6182 continue;
6183 }
6184
6185 if (info->relocatable)
6186 {
6187 if (got2 != NULL
6188 && r_type == R_PPC_PLTREL24
6189 && rel->r_addend >= 32768)
6190 {
6191 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6192 addend specifies the GOT pointer offset within .got2. */
6193 rel->r_addend += got2->output_offset;
6194 }
6195 continue;
6196 }
6197
6198 /* TLS optimizations. Replace instruction sequences and relocs
6199 based on information we collected in tls_optimize. We edit
6200 RELOCS so that --emit-relocs will output something sensible
6201 for the final instruction stream. */
6202 tls_mask = 0;
6203 tls_gd = 0;
6204 if (IS_PPC_TLS_RELOC (r_type))
6205 {
6206 if (h != NULL)
6207 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6208 else if (local_got_offsets != NULL)
6209 {
6210 char *lgot_masks;
6211 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6212 tls_mask = lgot_masks[r_symndx];
6213 }
6214 }
6215
6216 /* Ensure reloc mapping code below stays sane. */
6217 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6218 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6219 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6220 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6221 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6222 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6223 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6224 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6225 abort ();
6226 switch (r_type)
6227 {
6228 default:
6229 break;
6230
6231 case R_PPC_GOT_TPREL16:
6232 case R_PPC_GOT_TPREL16_LO:
6233 if (tls_mask != 0
6234 && (tls_mask & TLS_TPREL) == 0)
6235 {
6236 bfd_vma insn;
6237 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6238 insn &= 31 << 21;
6239 insn |= 0x3c020000; /* addis 0,2,0 */
6240 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6241 r_type = R_PPC_TPREL16_HA;
6242 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6243 }
6244 break;
6245
6246 case R_PPC_TLS:
6247 if (tls_mask != 0
6248 && (tls_mask & TLS_TPREL) == 0)
6249 {
6250 bfd_vma insn, rtra;
6251 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6252 if ((insn & ((31 << 26) | (31 << 11)))
6253 == ((31 << 26) | (2 << 11)))
6254 rtra = insn & ((1 << 26) - (1 << 16));
6255 else if ((insn & ((31 << 26) | (31 << 16)))
6256 == ((31 << 26) | (2 << 16)))
6257 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6258 else
6259 abort ();
6260 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6261 /* add -> addi. */
6262 insn = 14 << 26;
6263 else if ((insn & (31 << 1)) == 23 << 1
6264 && ((insn & (31 << 6)) < 14 << 6
6265 || ((insn & (31 << 6)) >= 16 << 6
6266 && (insn & (31 << 6)) < 24 << 6)))
6267 /* load and store indexed -> dform. */
6268 insn = (32 | ((insn >> 6) & 31)) << 26;
6269 else if ((insn & (31 << 1)) == 21 << 1
6270 && (insn & (0x1a << 6)) == 0)
6271 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6272 insn = (((58 | ((insn >> 6) & 4)) << 26)
6273 | ((insn >> 6) & 1));
6274 else if ((insn & (31 << 1)) == 21 << 1
6275 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6276 /* lwax -> lwa. */
6277 insn = (58 << 26) | 2;
6278 else
6279 abort ();
6280 insn |= rtra;
6281 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6282 r_type = R_PPC_TPREL16_LO;
6283 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6284
6285 /* Was PPC_TLS which sits on insn boundary, now
6286 PPC_TPREL16_LO which is at low-order half-word. */
6287 rel->r_offset += d_offset;
6288 }
6289 break;
6290
6291 case R_PPC_GOT_TLSGD16_HI:
6292 case R_PPC_GOT_TLSGD16_HA:
6293 tls_gd = TLS_TPRELGD;
6294 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6295 goto tls_gdld_hi;
6296 break;
6297
6298 case R_PPC_GOT_TLSLD16_HI:
6299 case R_PPC_GOT_TLSLD16_HA:
6300 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6301 {
6302 tls_gdld_hi:
6303 if ((tls_mask & tls_gd) != 0)
6304 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6305 + R_PPC_GOT_TPREL16);
6306 else
6307 {
6308 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6309 rel->r_offset -= d_offset;
6310 r_type = R_PPC_NONE;
6311 }
6312 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6313 }
6314 break;
6315
6316 case R_PPC_GOT_TLSGD16:
6317 case R_PPC_GOT_TLSGD16_LO:
6318 tls_gd = TLS_TPRELGD;
6319 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6320 goto tls_ldgd_opt;
6321 break;
6322
6323 case R_PPC_GOT_TLSLD16:
6324 case R_PPC_GOT_TLSLD16_LO:
6325 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6326 {
6327 bfd_vma insn1, insn2;
6328 bfd_vma offset;
6329
6330 tls_ldgd_opt:
6331 offset = rel[1].r_offset;
6332 insn1 = bfd_get_32 (output_bfd,
6333 contents + rel->r_offset - d_offset);
6334 if ((tls_mask & tls_gd) != 0)
6335 {
6336 /* IE */
6337 insn1 &= (1 << 26) - 1;
6338 insn1 |= 32 << 26; /* lwz */
6339 insn2 = 0x7c631214; /* add 3,3,2 */
6340 rel[1].r_info
6341 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6342 rel[1].r_addend = 0;
6343 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6344 + R_PPC_GOT_TPREL16);
6345 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6346 }
6347 else
6348 {
6349 /* LE */
6350 insn1 = 0x3c620000; /* addis 3,2,0 */
6351 insn2 = 0x38630000; /* addi 3,3,0 */
6352 if (tls_gd == 0)
6353 {
6354 /* Was an LD reloc. */
6355 for (r_symndx = 0;
6356 r_symndx < symtab_hdr->sh_info;
6357 r_symndx++)
6358 if (local_sections[r_symndx] == sec)
6359 break;
6360 if (r_symndx >= symtab_hdr->sh_info)
6361 r_symndx = 0;
6362 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6363 if (r_symndx != 0)
6364 rel->r_addend -= (local_syms[r_symndx].st_value
6365 + sec->output_offset
6366 + sec->output_section->vma);
6367 }
6368 r_type = R_PPC_TPREL16_HA;
6369 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6370 rel[1].r_info = ELF32_R_INFO (r_symndx,
6371 R_PPC_TPREL16_LO);
6372 rel[1].r_offset += d_offset;
6373 rel[1].r_addend = rel->r_addend;
6374 }
6375 bfd_put_32 (output_bfd, insn1,
6376 contents + rel->r_offset - d_offset);
6377 bfd_put_32 (output_bfd, insn2, contents + offset);
6378 if (tls_gd == 0)
6379 {
6380 /* We changed the symbol on an LD reloc. Start over
6381 in order to get h, sym, sec etc. right. */
6382 rel--;
6383 continue;
6384 }
6385 }
6386 break;
6387 }
6388
6389 /* Handle other relocations that tweak non-addend part of insn. */
6390 branch_bit = 0;
6391 switch (r_type)
6392 {
6393 default:
6394 break;
6395
6396 /* Branch taken prediction relocations. */
6397 case R_PPC_ADDR14_BRTAKEN:
6398 case R_PPC_REL14_BRTAKEN:
6399 branch_bit = BRANCH_PREDICT_BIT;
6400 /* Fall thru */
6401
6402 /* Branch not taken prediction relocations. */
6403 case R_PPC_ADDR14_BRNTAKEN:
6404 case R_PPC_REL14_BRNTAKEN:
6405 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6406 insn &= ~BRANCH_PREDICT_BIT;
6407 insn |= branch_bit;
6408
6409 from = (rel->r_offset
6410 + input_section->output_offset
6411 + input_section->output_section->vma);
6412
6413 /* Invert 'y' bit if not the default. */
6414 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6415 insn ^= BRANCH_PREDICT_BIT;
6416
6417 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6418 break;
6419 }
6420
6421 addend = rel->r_addend;
6422 tls_type = 0;
6423 howto = NULL;
6424 if (r_type < R_PPC_max)
6425 howto = ppc_elf_howto_table[r_type];
6426 switch (r_type)
6427 {
6428 default:
6429 (*_bfd_error_handler)
6430 (_("%B: unknown relocation type %d for symbol %s"),
6431 input_bfd, (int) r_type, sym_name);
6432
6433 bfd_set_error (bfd_error_bad_value);
6434 ret = FALSE;
6435 continue;
6436
6437 case R_PPC_NONE:
6438 case R_PPC_TLS:
6439 case R_PPC_EMB_MRKREF:
6440 case R_PPC_GNU_VTINHERIT:
6441 case R_PPC_GNU_VTENTRY:
6442 continue;
6443
6444 /* GOT16 relocations. Like an ADDR16 using the symbol's
6445 address in the GOT as relocation value instead of the
6446 symbol's value itself. Also, create a GOT entry for the
6447 symbol and put the symbol value there. */
6448 case R_PPC_GOT_TLSGD16:
6449 case R_PPC_GOT_TLSGD16_LO:
6450 case R_PPC_GOT_TLSGD16_HI:
6451 case R_PPC_GOT_TLSGD16_HA:
6452 tls_type = TLS_TLS | TLS_GD;
6453 goto dogot;
6454
6455 case R_PPC_GOT_TLSLD16:
6456 case R_PPC_GOT_TLSLD16_LO:
6457 case R_PPC_GOT_TLSLD16_HI:
6458 case R_PPC_GOT_TLSLD16_HA:
6459 tls_type = TLS_TLS | TLS_LD;
6460 goto dogot;
6461
6462 case R_PPC_GOT_TPREL16:
6463 case R_PPC_GOT_TPREL16_LO:
6464 case R_PPC_GOT_TPREL16_HI:
6465 case R_PPC_GOT_TPREL16_HA:
6466 tls_type = TLS_TLS | TLS_TPREL;
6467 goto dogot;
6468
6469 case R_PPC_GOT_DTPREL16:
6470 case R_PPC_GOT_DTPREL16_LO:
6471 case R_PPC_GOT_DTPREL16_HI:
6472 case R_PPC_GOT_DTPREL16_HA:
6473 tls_type = TLS_TLS | TLS_DTPREL;
6474 goto dogot;
6475
6476 case R_PPC_GOT16:
6477 case R_PPC_GOT16_LO:
6478 case R_PPC_GOT16_HI:
6479 case R_PPC_GOT16_HA:
6480 dogot:
6481 {
6482 /* Relocation is to the entry for this symbol in the global
6483 offset table. */
6484 bfd_vma off;
6485 bfd_vma *offp;
6486 unsigned long indx;
6487
6488 if (htab->got == NULL)
6489 abort ();
6490
6491 indx = 0;
6492 if (tls_type == (TLS_TLS | TLS_LD)
6493 && (h == NULL
6494 || !h->def_dynamic))
6495 offp = &htab->tlsld_got.offset;
6496 else if (h != NULL)
6497 {
6498 bfd_boolean dyn;
6499 dyn = htab->elf.dynamic_sections_created;
6500 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6501 || (info->shared
6502 && SYMBOL_REFERENCES_LOCAL (info, h)))
6503 /* This is actually a static link, or it is a
6504 -Bsymbolic link and the symbol is defined
6505 locally, or the symbol was forced to be local
6506 because of a version file. */
6507 ;
6508 else
6509 {
6510 indx = h->dynindx;
6511 unresolved_reloc = FALSE;
6512 }
6513 offp = &h->got.offset;
6514 }
6515 else
6516 {
6517 if (local_got_offsets == NULL)
6518 abort ();
6519 offp = &local_got_offsets[r_symndx];
6520 }
6521
6522 /* The offset must always be a multiple of 4. We use the
6523 least significant bit to record whether we have already
6524 processed this entry. */
6525 off = *offp;
6526 if ((off & 1) != 0)
6527 off &= ~1;
6528 else
6529 {
6530 unsigned int tls_m = (tls_mask
6531 & (TLS_LD | TLS_GD | TLS_DTPREL
6532 | TLS_TPREL | TLS_TPRELGD));
6533
6534 if (offp == &htab->tlsld_got.offset)
6535 tls_m = TLS_LD;
6536 else if (h == NULL
6537 || !h->def_dynamic)
6538 tls_m &= ~TLS_LD;
6539
6540 /* We might have multiple got entries for this sym.
6541 Initialize them all. */
6542 do
6543 {
6544 int tls_ty = 0;
6545
6546 if ((tls_m & TLS_LD) != 0)
6547 {
6548 tls_ty = TLS_TLS | TLS_LD;
6549 tls_m &= ~TLS_LD;
6550 }
6551 else if ((tls_m & TLS_GD) != 0)
6552 {
6553 tls_ty = TLS_TLS | TLS_GD;
6554 tls_m &= ~TLS_GD;
6555 }
6556 else if ((tls_m & TLS_DTPREL) != 0)
6557 {
6558 tls_ty = TLS_TLS | TLS_DTPREL;
6559 tls_m &= ~TLS_DTPREL;
6560 }
6561 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6562 {
6563 tls_ty = TLS_TLS | TLS_TPREL;
6564 tls_m = 0;
6565 }
6566
6567 /* Generate relocs for the dynamic linker. */
6568 if ((info->shared || indx != 0)
6569 && (offp == &htab->tlsld_got.offset
6570 || h == NULL
6571 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6572 || h->root.type != bfd_link_hash_undefweak))
6573 {
6574 outrel.r_offset = (htab->got->output_section->vma
6575 + htab->got->output_offset
6576 + off);
6577 outrel.r_addend = 0;
6578 if (tls_ty & (TLS_LD | TLS_GD))
6579 {
6580 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6581 if (tls_ty == (TLS_TLS | TLS_GD))
6582 {
6583 loc = htab->relgot->contents;
6584 loc += (htab->relgot->reloc_count++
6585 * sizeof (Elf32_External_Rela));
6586 bfd_elf32_swap_reloca_out (output_bfd,
6587 &outrel, loc);
6588 outrel.r_offset += 4;
6589 outrel.r_info
6590 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6591 }
6592 }
6593 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6594 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6595 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6596 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6597 else if (indx == 0)
6598 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6599 else
6600 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6601 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
6602 {
6603 outrel.r_addend += relocation;
6604 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6605 outrel.r_addend -= htab->elf.tls_sec->vma;
6606 }
6607 loc = htab->relgot->contents;
6608 loc += (htab->relgot->reloc_count++
6609 * sizeof (Elf32_External_Rela));
6610 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6611 }
6612
6613 /* Init the .got section contents if we're not
6614 emitting a reloc. */
6615 else
6616 {
6617 bfd_vma value = relocation;
6618
6619 if (tls_ty == (TLS_TLS | TLS_LD))
6620 value = 1;
6621 else if (tls_ty != 0)
6622 {
6623 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6624 if (tls_ty == (TLS_TLS | TLS_TPREL))
6625 value += DTP_OFFSET - TP_OFFSET;
6626
6627 if (tls_ty == (TLS_TLS | TLS_GD))
6628 {
6629 bfd_put_32 (output_bfd, value,
6630 htab->got->contents + off + 4);
6631 value = 1;
6632 }
6633 }
6634 bfd_put_32 (output_bfd, value,
6635 htab->got->contents + off);
6636 }
6637
6638 off += 4;
6639 if (tls_ty & (TLS_LD | TLS_GD))
6640 off += 4;
6641 }
6642 while (tls_m != 0);
6643
6644 off = *offp;
6645 *offp = off | 1;
6646 }
6647
6648 if (off >= (bfd_vma) -2)
6649 abort ();
6650
6651 if ((tls_type & TLS_TLS) != 0)
6652 {
6653 if (tls_type != (TLS_TLS | TLS_LD))
6654 {
6655 if ((tls_mask & TLS_LD) != 0
6656 && !(h == NULL
6657 || !h->def_dynamic))
6658 off += 8;
6659 if (tls_type != (TLS_TLS | TLS_GD))
6660 {
6661 if ((tls_mask & TLS_GD) != 0)
6662 off += 8;
6663 if (tls_type != (TLS_TLS | TLS_DTPREL))
6664 {
6665 if ((tls_mask & TLS_DTPREL) != 0)
6666 off += 4;
6667 }
6668 }
6669 }
6670 }
6671
6672 relocation = (htab->got->output_section->vma
6673 + htab->got->output_offset
6674 + off
6675 - SYM_VAL (htab->elf.hgot));
6676
6677 /* Addends on got relocations don't make much sense.
6678 x+off@got is actually x@got+off, and since the got is
6679 generated by a hash table traversal, the value in the
6680 got at entry m+n bears little relation to the entry m. */
6681 if (addend != 0)
6682 (*_bfd_error_handler)
6683 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6684 input_bfd,
6685 input_section,
6686 (long) rel->r_offset,
6687 howto->name,
6688 sym_name);
6689 }
6690 break;
6691
6692 /* Relocations that need no special processing. */
6693 case R_PPC_LOCAL24PC:
6694 /* It makes no sense to point a local relocation
6695 at a symbol not in this object. */
6696 if (unresolved_reloc)
6697 {
6698 if (! (*info->callbacks->undefined_symbol) (info,
6699 h->root.root.string,
6700 input_bfd,
6701 input_section,
6702 rel->r_offset,
6703 TRUE))
6704 return FALSE;
6705 continue;
6706 }
6707 break;
6708
6709 case R_PPC_DTPREL16:
6710 case R_PPC_DTPREL16_LO:
6711 case R_PPC_DTPREL16_HI:
6712 case R_PPC_DTPREL16_HA:
6713 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6714 break;
6715
6716 /* Relocations that may need to be propagated if this is a shared
6717 object. */
6718 case R_PPC_TPREL16:
6719 case R_PPC_TPREL16_LO:
6720 case R_PPC_TPREL16_HI:
6721 case R_PPC_TPREL16_HA:
6722 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6723 /* The TPREL16 relocs shouldn't really be used in shared
6724 libs as they will result in DT_TEXTREL being set, but
6725 support them anyway. */
6726 goto dodyn;
6727
6728 case R_PPC_TPREL32:
6729 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6730 goto dodyn;
6731
6732 case R_PPC_DTPREL32:
6733 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6734 goto dodyn;
6735
6736 case R_PPC_DTPMOD32:
6737 relocation = 1;
6738 addend = 0;
6739 goto dodyn;
6740
6741 case R_PPC_REL16:
6742 case R_PPC_REL16_LO:
6743 case R_PPC_REL16_HI:
6744 case R_PPC_REL16_HA:
6745 break;
6746
6747 case R_PPC_REL32:
6748 if (h == NULL || h == htab->elf.hgot)
6749 break;
6750 /* fall through */
6751
6752 case R_PPC_ADDR32:
6753 case R_PPC_ADDR16:
6754 case R_PPC_ADDR16_LO:
6755 case R_PPC_ADDR16_HI:
6756 case R_PPC_ADDR16_HA:
6757 case R_PPC_UADDR32:
6758 case R_PPC_UADDR16:
6759 goto dodyn;
6760
6761 case R_PPC_REL24:
6762 case R_PPC_REL14:
6763 case R_PPC_REL14_BRTAKEN:
6764 case R_PPC_REL14_BRNTAKEN:
6765 /* If these relocations are not to a named symbol, they can be
6766 handled right here, no need to bother the dynamic linker. */
6767 if (SYMBOL_CALLS_LOCAL (info, h)
6768 || h == htab->elf.hgot)
6769 break;
6770 /* fall through */
6771
6772 case R_PPC_ADDR24:
6773 case R_PPC_ADDR14:
6774 case R_PPC_ADDR14_BRTAKEN:
6775 case R_PPC_ADDR14_BRNTAKEN:
6776 if (h != NULL && !info->shared)
6777 break;
6778 /* fall through */
6779
6780 dodyn:
6781 if ((input_section->flags & SEC_ALLOC) == 0
6782 || is_vxworks_tls)
6783 break;
6784
6785 if ((info->shared
6786 && !(h != NULL
6787 && ((h->root.type == bfd_link_hash_undefined
6788 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6789 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6790 || (h->root.type == bfd_link_hash_undefweak
6791 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6792 && (must_be_dyn_reloc (info, r_type)
6793 || !SYMBOL_CALLS_LOCAL (info, h)))
6794 || (ELIMINATE_COPY_RELOCS
6795 && !info->shared
6796 && h != NULL
6797 && h->dynindx != -1
6798 && !h->non_got_ref
6799 && !h->def_regular))
6800 {
6801 int skip;
6802
6803 #ifdef DEBUG
6804 fprintf (stderr, "ppc_elf_relocate_section needs to "
6805 "create relocation for %s\n",
6806 (h && h->root.root.string
6807 ? h->root.root.string : "<unknown>"));
6808 #endif
6809
6810 /* When generating a shared object, these relocations
6811 are copied into the output file to be resolved at run
6812 time. */
6813 if (sreloc == NULL)
6814 {
6815 sreloc = _bfd_elf_get_dynamic_reloc_section
6816 (input_bfd, input_section, /*rela?*/ TRUE);
6817 if (sreloc == NULL)
6818 return FALSE;
6819 }
6820
6821 skip = 0;
6822 outrel.r_offset =
6823 _bfd_elf_section_offset (output_bfd, info, input_section,
6824 rel->r_offset);
6825 if (outrel.r_offset == (bfd_vma) -1
6826 || outrel.r_offset == (bfd_vma) -2)
6827 skip = (int) outrel.r_offset;
6828 outrel.r_offset += (input_section->output_section->vma
6829 + input_section->output_offset);
6830
6831 if (skip)
6832 memset (&outrel, 0, sizeof outrel);
6833 else if ((h != NULL
6834 && (h->root.type == bfd_link_hash_undefined
6835 || h->root.type == bfd_link_hash_undefweak))
6836 || !SYMBOL_REFERENCES_LOCAL (info, h))
6837 {
6838 unresolved_reloc = FALSE;
6839 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6840 outrel.r_addend = rel->r_addend;
6841 }
6842 else
6843 {
6844 outrel.r_addend = relocation + rel->r_addend;
6845
6846 if (r_type == R_PPC_ADDR32)
6847 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6848 else
6849 {
6850 long indx = 0;
6851
6852 if (r_symndx == 0 || bfd_is_abs_section (sec))
6853 ;
6854 else if (sec == NULL || sec->owner == NULL)
6855 {
6856 bfd_set_error (bfd_error_bad_value);
6857 ret = FALSE;
6858 }
6859 else
6860 {
6861 asection *osec;
6862
6863 /* We are turning this relocation into one
6864 against a section symbol. It would be
6865 proper to subtract the symbol's value,
6866 osec->vma, from the emitted reloc addend,
6867 but ld.so expects buggy relocs. */
6868 osec = sec->output_section;
6869 indx = elf_section_data (osec)->dynindx;
6870 if (indx == 0)
6871 {
6872 osec = htab->elf.text_index_section;
6873 indx = elf_section_data (osec)->dynindx;
6874 }
6875 BFD_ASSERT (indx != 0);
6876 #ifdef DEBUG
6877 if (indx == 0)
6878 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6879 indx, osec->name, osec->flags,
6880 h->root.root.string);
6881 #endif
6882 }
6883
6884 outrel.r_info = ELF32_R_INFO (indx, r_type);
6885 }
6886 }
6887
6888 loc = sreloc->contents;
6889 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6890 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6891
6892 if (skip == -1)
6893 continue;
6894
6895 /* This reloc will be computed at runtime. We clear the memory
6896 so that it contains predictable value. */
6897 if (! skip
6898 && ((input_section->flags & SEC_ALLOC) != 0
6899 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6900 {
6901 relocation = howto->pc_relative ? outrel.r_offset : 0;
6902 addend = 0;
6903 break;
6904 }
6905 }
6906 break;
6907
6908 case R_PPC_RELAX32PC_PLT:
6909 case R_PPC_RELAX32_PLT:
6910 {
6911 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6912
6913 if (htab->plt_type == PLT_NEW)
6914 relocation = (htab->glink->output_section->vma
6915 + htab->glink->output_offset
6916 + ent->glink_offset);
6917 else
6918 relocation = (htab->plt->output_section->vma
6919 + htab->plt->output_offset
6920 + ent->plt.offset);
6921 }
6922 if (r_type == R_PPC_RELAX32_PLT)
6923 goto relax32;
6924 /* Fall thru */
6925
6926 case R_PPC_RELAX32PC:
6927 relocation -= (input_section->output_section->vma
6928 + input_section->output_offset
6929 + rel->r_offset - 4);
6930 /* Fall thru */
6931
6932 case R_PPC_RELAX32:
6933 relax32:
6934 {
6935 unsigned long t0;
6936 unsigned long t1;
6937
6938 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6939 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6940
6941 /* We're clearing the bits for R_PPC_ADDR16_HA
6942 and R_PPC_ADDR16_LO here. */
6943 t0 &= ~0xffff;
6944 t1 &= ~0xffff;
6945
6946 /* t0 is HA, t1 is LO */
6947 relocation += addend;
6948 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6949 t1 |= relocation & 0xffff;
6950
6951 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6952 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6953 }
6954 continue;
6955
6956 /* Indirect .sdata relocation. */
6957 case R_PPC_EMB_SDAI16:
6958 BFD_ASSERT (htab->sdata[0].section != NULL);
6959 relocation
6960 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6961 h, relocation, rel);
6962 break;
6963
6964 /* Indirect .sdata2 relocation. */
6965 case R_PPC_EMB_SDA2I16:
6966 BFD_ASSERT (htab->sdata[1].section != NULL);
6967 relocation
6968 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6969 h, relocation, rel);
6970 break;
6971
6972 /* Handle the TOC16 reloc. We want to use the offset within the .got
6973 section, not the actual VMA. This is appropriate when generating
6974 an embedded ELF object, for which the .got section acts like the
6975 AIX .toc section. */
6976 case R_PPC_TOC16: /* phony GOT16 relocations */
6977 if (sec == NULL || sec->output_section == NULL)
6978 {
6979 unresolved_reloc = TRUE;
6980 break;
6981 }
6982 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6983 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6984
6985 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6986 break;
6987
6988 case R_PPC_PLTREL24:
6989 /* Relocation is to the entry for this symbol in the
6990 procedure linkage table. */
6991 {
6992 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6993
6994 addend = 0;
6995 if (ent == NULL
6996 || htab->plt == NULL)
6997 {
6998 /* We didn't make a PLT entry for this symbol. This
6999 happens when statically linking PIC code, or when
7000 using -Bsymbolic. */
7001 break;
7002 }
7003
7004 unresolved_reloc = FALSE;
7005 if (htab->plt_type == PLT_NEW)
7006 relocation = (htab->glink->output_section->vma
7007 + htab->glink->output_offset
7008 + ent->glink_offset);
7009 else
7010 relocation = (htab->plt->output_section->vma
7011 + htab->plt->output_offset
7012 + ent->plt.offset);
7013 }
7014 break;
7015
7016 /* Relocate against _SDA_BASE_. */
7017 case R_PPC_SDAREL16:
7018 {
7019 const char *name;
7020
7021 if (sec == NULL || sec->output_section == NULL)
7022 {
7023 unresolved_reloc = TRUE;
7024 break;
7025 }
7026
7027 name = bfd_get_section_name (abfd, sec->output_section);
7028 if (! ((CONST_STRNEQ (name, ".sdata")
7029 && (name[6] == 0 || name[6] == '.'))
7030 || (CONST_STRNEQ (name, ".sbss")
7031 && (name[5] == 0 || name[5] == '.'))))
7032 {
7033 (*_bfd_error_handler)
7034 (_("%B: the target (%s) of a %s relocation is "
7035 "in the wrong output section (%s)"),
7036 input_bfd,
7037 sym_name,
7038 howto->name,
7039 name);
7040 }
7041 addend -= SYM_VAL (htab->sdata[0].sym);
7042 }
7043 break;
7044
7045 /* Relocate against _SDA2_BASE_. */
7046 case R_PPC_EMB_SDA2REL:
7047 {
7048 const char *name;
7049
7050 if (sec == NULL || sec->output_section == NULL)
7051 {
7052 unresolved_reloc = TRUE;
7053 break;
7054 }
7055
7056 name = bfd_get_section_name (abfd, sec->output_section);
7057 if (! (CONST_STRNEQ (name, ".sdata2")
7058 || CONST_STRNEQ (name, ".sbss2")))
7059 {
7060 (*_bfd_error_handler)
7061 (_("%B: the target (%s) of a %s relocation is "
7062 "in the wrong output section (%s)"),
7063 input_bfd,
7064 sym_name,
7065 howto->name,
7066 name);
7067
7068 bfd_set_error (bfd_error_bad_value);
7069 ret = FALSE;
7070 continue;
7071 }
7072 addend -= SYM_VAL (htab->sdata[1].sym);
7073 }
7074 break;
7075
7076 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7077 case R_PPC_EMB_SDA21:
7078 case R_PPC_EMB_RELSDA:
7079 {
7080 const char *name;
7081 int reg;
7082
7083 if (sec == NULL || sec->output_section == NULL)
7084 {
7085 unresolved_reloc = TRUE;
7086 break;
7087 }
7088
7089 name = bfd_get_section_name (abfd, sec->output_section);
7090 if (((CONST_STRNEQ (name, ".sdata")
7091 && (name[6] == 0 || name[6] == '.'))
7092 || (CONST_STRNEQ (name, ".sbss")
7093 && (name[5] == 0 || name[5] == '.'))))
7094 {
7095 reg = 13;
7096 addend -= SYM_VAL (htab->sdata[0].sym);
7097 }
7098 else if (CONST_STRNEQ (name, ".sdata2")
7099 || CONST_STRNEQ (name, ".sbss2"))
7100 {
7101 reg = 2;
7102 addend -= SYM_VAL (htab->sdata[1].sym);
7103 }
7104 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7105 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7106 {
7107 reg = 0;
7108 }
7109 else
7110 {
7111 (*_bfd_error_handler)
7112 (_("%B: the target (%s) of a %s relocation is "
7113 "in the wrong output section (%s)"),
7114 input_bfd,
7115 sym_name,
7116 howto->name,
7117 name);
7118
7119 bfd_set_error (bfd_error_bad_value);
7120 ret = FALSE;
7121 continue;
7122 }
7123
7124 if (r_type == R_PPC_EMB_SDA21)
7125 { /* fill in register field */
7126 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7127 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7128 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7129 }
7130 }
7131 break;
7132
7133 /* Relocate against the beginning of the section. */
7134 case R_PPC_SECTOFF:
7135 case R_PPC_SECTOFF_LO:
7136 case R_PPC_SECTOFF_HI:
7137 case R_PPC_SECTOFF_HA:
7138 if (sec == NULL || sec->output_section == NULL)
7139 {
7140 unresolved_reloc = TRUE;
7141 break;
7142 }
7143 addend -= sec->output_section->vma;
7144 break;
7145
7146 /* Negative relocations. */
7147 case R_PPC_EMB_NADDR32:
7148 case R_PPC_EMB_NADDR16:
7149 case R_PPC_EMB_NADDR16_LO:
7150 case R_PPC_EMB_NADDR16_HI:
7151 case R_PPC_EMB_NADDR16_HA:
7152 addend -= 2 * relocation;
7153 break;
7154
7155 case R_PPC_COPY:
7156 case R_PPC_GLOB_DAT:
7157 case R_PPC_JMP_SLOT:
7158 case R_PPC_RELATIVE:
7159 case R_PPC_PLT32:
7160 case R_PPC_PLTREL32:
7161 case R_PPC_PLT16_LO:
7162 case R_PPC_PLT16_HI:
7163 case R_PPC_PLT16_HA:
7164 case R_PPC_ADDR30:
7165 case R_PPC_EMB_RELSEC16:
7166 case R_PPC_EMB_RELST_LO:
7167 case R_PPC_EMB_RELST_HI:
7168 case R_PPC_EMB_RELST_HA:
7169 case R_PPC_EMB_BIT_FLD:
7170 (*_bfd_error_handler)
7171 (_("%B: relocation %s is not yet supported for symbol %s."),
7172 input_bfd,
7173 howto->name,
7174 sym_name);
7175
7176 bfd_set_error (bfd_error_invalid_operation);
7177 ret = FALSE;
7178 continue;
7179 }
7180
7181 /* Do any further special processing. */
7182 switch (r_type)
7183 {
7184 default:
7185 break;
7186
7187 case R_PPC_ADDR16_HA:
7188 case R_PPC_REL16_HA:
7189 case R_PPC_SECTOFF_HA:
7190 case R_PPC_TPREL16_HA:
7191 case R_PPC_DTPREL16_HA:
7192 case R_PPC_EMB_NADDR16_HA:
7193 case R_PPC_EMB_RELST_HA:
7194 /* It's just possible that this symbol is a weak symbol
7195 that's not actually defined anywhere. In that case,
7196 'sec' would be NULL, and we should leave the symbol
7197 alone (it will be set to zero elsewhere in the link). */
7198 if (sec == NULL)
7199 break;
7200 /* Fall thru */
7201
7202 case R_PPC_PLT16_HA:
7203 case R_PPC_GOT16_HA:
7204 case R_PPC_GOT_TLSGD16_HA:
7205 case R_PPC_GOT_TLSLD16_HA:
7206 case R_PPC_GOT_TPREL16_HA:
7207 case R_PPC_GOT_DTPREL16_HA:
7208 /* Add 0x10000 if sign bit in 0:15 is set.
7209 Bits 0:15 are not used. */
7210 addend += 0x8000;
7211 break;
7212 }
7213
7214 #ifdef DEBUG
7215 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7216 "offset = %ld, addend = %ld\n",
7217 howto->name,
7218 (int) r_type,
7219 sym_name,
7220 r_symndx,
7221 (long) rel->r_offset,
7222 (long) addend);
7223 #endif
7224
7225 if (unresolved_reloc
7226 && !((input_section->flags & SEC_DEBUGGING) != 0
7227 && h->def_dynamic))
7228 {
7229 (*_bfd_error_handler)
7230 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7231 input_bfd,
7232 input_section,
7233 (long) rel->r_offset,
7234 howto->name,
7235 sym_name);
7236 ret = FALSE;
7237 }
7238
7239 r = _bfd_final_link_relocate (howto,
7240 input_bfd,
7241 input_section,
7242 contents,
7243 rel->r_offset,
7244 relocation,
7245 addend);
7246
7247 if (r != bfd_reloc_ok)
7248 {
7249 if (r == bfd_reloc_overflow)
7250 {
7251 if (warned)
7252 continue;
7253 if (h != NULL
7254 && h->root.type == bfd_link_hash_undefweak
7255 && howto->pc_relative)
7256 {
7257 /* Assume this is a call protected by other code that
7258 detect the symbol is undefined. If this is the case,
7259 we can safely ignore the overflow. If not, the
7260 program is hosed anyway, and a little warning isn't
7261 going to help. */
7262
7263 continue;
7264 }
7265
7266 if (! (*info->callbacks->reloc_overflow) (info,
7267 (h ? &h->root : NULL),
7268 sym_name,
7269 howto->name,
7270 rel->r_addend,
7271 input_bfd,
7272 input_section,
7273 rel->r_offset))
7274 return FALSE;
7275 }
7276 else
7277 {
7278 (*_bfd_error_handler)
7279 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7280 input_bfd, input_section,
7281 (long) rel->r_offset, howto->name, sym_name, (int) r);
7282 ret = FALSE;
7283 }
7284 }
7285 }
7286
7287 #ifdef DEBUG
7288 fprintf (stderr, "\n");
7289 #endif
7290
7291 return ret;
7292 }
7293 \f
7294 #define PPC_LO(v) ((v) & 0xffff)
7295 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7296 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7297
7298 /* Finish up dynamic symbol handling. We set the contents of various
7299 dynamic sections here. */
7300
7301 static bfd_boolean
7302 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7303 struct bfd_link_info *info,
7304 struct elf_link_hash_entry *h,
7305 Elf_Internal_Sym *sym)
7306 {
7307 struct ppc_elf_link_hash_table *htab;
7308 struct plt_entry *ent;
7309 bfd_boolean doneone;
7310
7311 #ifdef DEBUG
7312 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7313 h->root.root.string);
7314 #endif
7315
7316 htab = ppc_elf_hash_table (info);
7317 BFD_ASSERT (htab->elf.dynobj != NULL);
7318
7319 doneone = FALSE;
7320 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7321 if (ent->plt.offset != (bfd_vma) -1)
7322 {
7323 if (!doneone)
7324 {
7325 Elf_Internal_Rela rela;
7326 bfd_byte *loc;
7327 bfd_vma reloc_index;
7328
7329 if (htab->plt_type == PLT_NEW)
7330 reloc_index = ent->plt.offset / 4;
7331 else
7332 {
7333 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7334 / htab->plt_slot_size);
7335 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7336 && htab->plt_type == PLT_OLD)
7337 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7338 }
7339
7340 /* This symbol has an entry in the procedure linkage table.
7341 Set it up. */
7342 if (htab->plt_type == PLT_VXWORKS)
7343 {
7344 bfd_vma got_offset;
7345 const bfd_vma *plt_entry;
7346
7347 /* The first three entries in .got.plt are reserved. */
7348 got_offset = (reloc_index + 3) * 4;
7349
7350 /* Use the right PLT. */
7351 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7352 : ppc_elf_vxworks_plt_entry;
7353
7354 /* Fill in the .plt on VxWorks. */
7355 if (info->shared)
7356 {
7357 bfd_put_32 (output_bfd,
7358 plt_entry[0] | PPC_HA (got_offset),
7359 htab->plt->contents + ent->plt.offset + 0);
7360 bfd_put_32 (output_bfd,
7361 plt_entry[1] | PPC_LO (got_offset),
7362 htab->plt->contents + ent->plt.offset + 4);
7363 }
7364 else
7365 {
7366 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7367
7368 bfd_put_32 (output_bfd,
7369 plt_entry[0] | PPC_HA (got_loc),
7370 htab->plt->contents + ent->plt.offset + 0);
7371 bfd_put_32 (output_bfd,
7372 plt_entry[1] | PPC_LO (got_loc),
7373 htab->plt->contents + ent->plt.offset + 4);
7374 }
7375
7376 bfd_put_32 (output_bfd, plt_entry[2],
7377 htab->plt->contents + ent->plt.offset + 8);
7378 bfd_put_32 (output_bfd, plt_entry[3],
7379 htab->plt->contents + ent->plt.offset + 12);
7380
7381 /* This instruction is an immediate load. The value loaded is
7382 the byte offset of the R_PPC_JMP_SLOT relocation from the
7383 start of the .rela.plt section. The value is stored in the
7384 low-order 16 bits of the load instruction. */
7385 /* NOTE: It appears that this is now an index rather than a
7386 prescaled offset. */
7387 bfd_put_32 (output_bfd,
7388 plt_entry[4] | reloc_index,
7389 htab->plt->contents + ent->plt.offset + 16);
7390 /* This instruction is a PC-relative branch whose target is
7391 the start of the PLT section. The address of this branch
7392 instruction is 20 bytes beyond the start of this PLT entry.
7393 The address is encoded in bits 6-29, inclusive. The value
7394 stored is right-shifted by two bits, permitting a 26-bit
7395 offset. */
7396 bfd_put_32 (output_bfd,
7397 (plt_entry[5]
7398 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7399 htab->plt->contents + ent->plt.offset + 20);
7400 bfd_put_32 (output_bfd, plt_entry[6],
7401 htab->plt->contents + ent->plt.offset + 24);
7402 bfd_put_32 (output_bfd, plt_entry[7],
7403 htab->plt->contents + ent->plt.offset + 28);
7404
7405 /* Fill in the GOT entry corresponding to this PLT slot with
7406 the address immediately after the the "bctr" instruction
7407 in this PLT entry. */
7408 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7409 + htab->plt->output_offset
7410 + ent->plt.offset + 16),
7411 htab->sgotplt->contents + got_offset);
7412
7413 if (!info->shared)
7414 {
7415 /* Fill in a couple of entries in .rela.plt.unloaded. */
7416 loc = htab->srelplt2->contents
7417 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7418 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7419 * sizeof (Elf32_External_Rela));
7420
7421 /* Provide the @ha relocation for the first instruction. */
7422 rela.r_offset = (htab->plt->output_section->vma
7423 + htab->plt->output_offset
7424 + ent->plt.offset + 2);
7425 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7426 R_PPC_ADDR16_HA);
7427 rela.r_addend = got_offset;
7428 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7429 loc += sizeof (Elf32_External_Rela);
7430
7431 /* Provide the @l relocation for the second instruction. */
7432 rela.r_offset = (htab->plt->output_section->vma
7433 + htab->plt->output_offset
7434 + ent->plt.offset + 6);
7435 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7436 R_PPC_ADDR16_LO);
7437 rela.r_addend = got_offset;
7438 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7439 loc += sizeof (Elf32_External_Rela);
7440
7441 /* Provide a relocation for the GOT entry corresponding to this
7442 PLT slot. Point it at the middle of the .plt entry. */
7443 rela.r_offset = (htab->sgotplt->output_section->vma
7444 + htab->sgotplt->output_offset
7445 + got_offset);
7446 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7447 R_PPC_ADDR32);
7448 rela.r_addend = ent->plt.offset + 16;
7449 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7450 }
7451
7452 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7453 In particular, the offset for the relocation is not the
7454 address of the PLT entry for this function, as specified
7455 by the ABI. Instead, the offset is set to the address of
7456 the GOT slot for this function. See EABI 4.4.4.1. */
7457 rela.r_offset = (htab->sgotplt->output_section->vma
7458 + htab->sgotplt->output_offset
7459 + got_offset);
7460
7461 }
7462 else
7463 {
7464 rela.r_offset = (htab->plt->output_section->vma
7465 + htab->plt->output_offset
7466 + ent->plt.offset);
7467 if (htab->plt_type == PLT_OLD)
7468 {
7469 /* We don't need to fill in the .plt. The ppc dynamic
7470 linker will fill it in. */
7471 }
7472 else
7473 {
7474 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7475 + htab->glink->output_section->vma
7476 + htab->glink->output_offset);
7477 bfd_put_32 (output_bfd, val,
7478 htab->plt->contents + ent->plt.offset);
7479 }
7480 }
7481
7482 /* Fill in the entry in the .rela.plt section. */
7483 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7484 rela.r_addend = 0;
7485
7486 loc = (htab->relplt->contents
7487 + reloc_index * sizeof (Elf32_External_Rela));
7488 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7489
7490 if (!h->def_regular)
7491 {
7492 /* Mark the symbol as undefined, rather than as
7493 defined in the .plt section. Leave the value if
7494 there were any relocations where pointer equality
7495 matters (this is a clue for the dynamic linker, to
7496 make function pointer comparisons work between an
7497 application and shared library), otherwise set it
7498 to zero. */
7499 sym->st_shndx = SHN_UNDEF;
7500 if (!h->pointer_equality_needed)
7501 sym->st_value = 0;
7502 else if (!h->ref_regular_nonweak)
7503 {
7504 /* This breaks function pointer comparisons, but
7505 that is better than breaking tests for a NULL
7506 function pointer. */
7507 sym->st_value = 0;
7508 }
7509 }
7510 doneone = TRUE;
7511 }
7512
7513 if (htab->plt_type == PLT_NEW)
7514 {
7515 bfd_vma plt;
7516 unsigned char *p;
7517
7518 plt = (ent->plt.offset
7519 + htab->plt->output_section->vma
7520 + htab->plt->output_offset);
7521 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7522
7523 if (info->shared || info->pie)
7524 {
7525 bfd_vma got = 0;
7526
7527 if (ent->addend >= 32768)
7528 got = (ent->addend
7529 + ent->sec->output_section->vma
7530 + ent->sec->output_offset);
7531 else if (htab->elf.hgot != NULL)
7532 got = SYM_VAL (htab->elf.hgot);
7533
7534 plt -= got;
7535
7536 if (plt + 0x8000 < 0x10000)
7537 {
7538 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7539 p += 4;
7540 bfd_put_32 (output_bfd, MTCTR_11, p);
7541 p += 4;
7542 bfd_put_32 (output_bfd, BCTR, p);
7543 p += 4;
7544 bfd_put_32 (output_bfd, NOP, p);
7545 p += 4;
7546 }
7547 else
7548 {
7549 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7550 p += 4;
7551 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7552 p += 4;
7553 bfd_put_32 (output_bfd, MTCTR_11, p);
7554 p += 4;
7555 bfd_put_32 (output_bfd, BCTR, p);
7556 p += 4;
7557 }
7558 }
7559 else
7560 {
7561 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7562 p += 4;
7563 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7564 p += 4;
7565 bfd_put_32 (output_bfd, MTCTR_11, p);
7566 p += 4;
7567 bfd_put_32 (output_bfd, BCTR, p);
7568 p += 4;
7569
7570 /* We only need one non-PIC glink stub. */
7571 break;
7572 }
7573 }
7574 else
7575 break;
7576 }
7577
7578 if (h->needs_copy)
7579 {
7580 asection *s;
7581 Elf_Internal_Rela rela;
7582 bfd_byte *loc;
7583
7584 /* This symbols needs a copy reloc. Set it up. */
7585
7586 #ifdef DEBUG
7587 fprintf (stderr, ", copy");
7588 #endif
7589
7590 BFD_ASSERT (h->dynindx != -1);
7591
7592 if (ppc_elf_hash_entry (h)->has_sda_refs)
7593 s = htab->relsbss;
7594 else
7595 s = htab->relbss;
7596 BFD_ASSERT (s != NULL);
7597
7598 rela.r_offset = SYM_VAL (h);
7599 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7600 rela.r_addend = 0;
7601 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7602 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7603 }
7604
7605 #ifdef DEBUG
7606 fprintf (stderr, "\n");
7607 #endif
7608
7609 /* Mark some specially defined symbols as absolute. */
7610 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7611 || (!htab->is_vxworks
7612 && (h == htab->elf.hgot
7613 || strcmp (h->root.root.string,
7614 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7615 sym->st_shndx = SHN_ABS;
7616
7617 return TRUE;
7618 }
7619 \f
7620 static enum elf_reloc_type_class
7621 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7622 {
7623 switch (ELF32_R_TYPE (rela->r_info))
7624 {
7625 case R_PPC_RELATIVE:
7626 return reloc_class_relative;
7627 case R_PPC_REL24:
7628 case R_PPC_ADDR24:
7629 case R_PPC_JMP_SLOT:
7630 return reloc_class_plt;
7631 case R_PPC_COPY:
7632 return reloc_class_copy;
7633 default:
7634 return reloc_class_normal;
7635 }
7636 }
7637 \f
7638 /* Finish up the dynamic sections. */
7639
7640 static bfd_boolean
7641 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7642 struct bfd_link_info *info)
7643 {
7644 asection *sdyn;
7645 asection *splt;
7646 struct ppc_elf_link_hash_table *htab;
7647 bfd_vma got;
7648 bfd *dynobj;
7649 bfd_boolean ret = TRUE;
7650
7651 #ifdef DEBUG
7652 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7653 #endif
7654
7655 htab = ppc_elf_hash_table (info);
7656 dynobj = elf_hash_table (info)->dynobj;
7657 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7658 if (htab->is_vxworks)
7659 splt = bfd_get_section_by_name (dynobj, ".plt");
7660 else
7661 splt = NULL;
7662
7663 got = 0;
7664 if (htab->elf.hgot != NULL)
7665 got = SYM_VAL (htab->elf.hgot);
7666
7667 if (htab->elf.dynamic_sections_created)
7668 {
7669 Elf32_External_Dyn *dyncon, *dynconend;
7670
7671 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7672
7673 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7674 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7675 for (; dyncon < dynconend; dyncon++)
7676 {
7677 Elf_Internal_Dyn dyn;
7678 asection *s;
7679
7680 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7681
7682 switch (dyn.d_tag)
7683 {
7684 case DT_PLTGOT:
7685 if (htab->is_vxworks)
7686 s = htab->sgotplt;
7687 else
7688 s = htab->plt;
7689 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7690 break;
7691
7692 case DT_PLTRELSZ:
7693 dyn.d_un.d_val = htab->relplt->size;
7694 break;
7695
7696 case DT_JMPREL:
7697 s = htab->relplt;
7698 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7699 break;
7700
7701 case DT_PPC_GOT:
7702 dyn.d_un.d_ptr = got;
7703 break;
7704
7705 case DT_RELASZ:
7706 if (htab->is_vxworks)
7707 {
7708 if (htab->relplt)
7709 dyn.d_un.d_ptr -= htab->relplt->size;
7710 break;
7711 }
7712 continue;
7713
7714 default:
7715 if (htab->is_vxworks
7716 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7717 break;
7718 continue;
7719 }
7720
7721 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7722 }
7723 }
7724
7725 if (htab->got != NULL)
7726 {
7727 if (htab->elf.hgot->root.u.def.section == htab->got
7728 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
7729 {
7730 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
7731
7732 p += htab->elf.hgot->root.u.def.value;
7733 if (htab->plt_type == PLT_OLD)
7734 {
7735 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
7736 so that a function can easily find the address of
7737 _GLOBAL_OFFSET_TABLE_. */
7738 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
7739 < htab->elf.hgot->root.u.def.section->size);
7740 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
7741 }
7742
7743 if (sdyn != NULL)
7744 {
7745 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
7746 BFD_ASSERT (htab->elf.hgot->root.u.def.value
7747 < htab->elf.hgot->root.u.def.section->size);
7748 bfd_put_32 (output_bfd, val, p);
7749 }
7750 }
7751 else
7752 {
7753 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7754 htab->elf.hgot->root.root.string,
7755 (htab->sgotplt != NULL
7756 ? htab->sgotplt->name : htab->got->name));
7757 bfd_set_error (bfd_error_bad_value);
7758 ret = FALSE;
7759 }
7760
7761 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7762 }
7763
7764 /* Fill in the first entry in the VxWorks procedure linkage table. */
7765 if (splt && splt->size > 0)
7766 {
7767 /* Use the right PLT. */
7768 static const bfd_vma *plt_entry = NULL;
7769 plt_entry = info->shared ?
7770 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7771
7772 if (!info->shared)
7773 {
7774 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7775
7776 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7777 splt->contents + 0);
7778 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
7779 splt->contents + 4);
7780 }
7781 else
7782 {
7783 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7784 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7785 }
7786 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7787 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7788 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7789 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7790 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7791 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7792
7793 if (! info->shared)
7794 {
7795 Elf_Internal_Rela rela;
7796 bfd_byte *loc;
7797
7798 loc = htab->srelplt2->contents;
7799
7800 /* Output the @ha relocation for the first instruction. */
7801 rela.r_offset = (htab->plt->output_section->vma
7802 + htab->plt->output_offset
7803 + 2);
7804 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7805 rela.r_addend = 0;
7806 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7807 loc += sizeof (Elf32_External_Rela);
7808
7809 /* Output the @l relocation for the second instruction. */
7810 rela.r_offset = (htab->plt->output_section->vma
7811 + htab->plt->output_offset
7812 + 6);
7813 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7814 rela.r_addend = 0;
7815 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7816 loc += sizeof (Elf32_External_Rela);
7817
7818 /* Fix up the remaining relocations. They may have the wrong
7819 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7820 in which symbols were output. */
7821 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7822 {
7823 Elf_Internal_Rela rel;
7824
7825 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7826 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7827 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7828 loc += sizeof (Elf32_External_Rela);
7829
7830 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7831 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7832 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7833 loc += sizeof (Elf32_External_Rela);
7834
7835 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7836 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7837 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7838 loc += sizeof (Elf32_External_Rela);
7839 }
7840 }
7841 }
7842
7843 if (htab->glink != NULL && htab->glink->contents != NULL)
7844 {
7845 unsigned char *p;
7846 unsigned char *endp;
7847 bfd_vma res0;
7848 unsigned int i;
7849
7850 /*
7851 * PIC glink code is the following:
7852 *
7853 * # ith PLT code stub.
7854 * addis 11,30,(plt+(i-1)*4-got)@ha
7855 * lwz 11,(plt+(i-1)*4-got)@l(11)
7856 * mtctr 11
7857 * bctr
7858 *
7859 * # A table of branches, one for each plt entry.
7860 * # The idea is that the plt call stub loads ctr and r11 with these
7861 * # addresses, so (r11 - res_0) gives the plt index * 4.
7862 * res_0: b PLTresolve
7863 * res_1: b PLTresolve
7864 * .
7865 * # Some number of entries towards the end can be nops
7866 * res_n_m3: nop
7867 * res_n_m2: nop
7868 * res_n_m1:
7869 *
7870 * PLTresolve:
7871 * addis 11,11,(1f-res_0)@ha
7872 * mflr 0
7873 * bcl 20,31,1f
7874 * 1: addi 11,11,(1b-res_0)@l
7875 * mflr 12
7876 * mtlr 0
7877 * sub 11,11,12 # r11 = index * 4
7878 * addis 12,12,(got+4-1b)@ha
7879 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7880 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7881 * mtctr 0
7882 * add 0,11,11
7883 * add 11,0,11 # r11 = index * 12 = reloc offset.
7884 * bctr
7885 */
7886 static const unsigned int pic_plt_resolve[] =
7887 {
7888 ADDIS_11_11,
7889 MFLR_0,
7890 BCL_20_31,
7891 ADDI_11_11,
7892 MFLR_12,
7893 MTLR_0,
7894 SUB_11_11_12,
7895 ADDIS_12_12,
7896 LWZ_0_12,
7897 LWZ_12_12,
7898 MTCTR_0,
7899 ADD_0_11_11,
7900 ADD_11_0_11,
7901 BCTR,
7902 NOP,
7903 NOP
7904 };
7905
7906 /*
7907 * Non-PIC glink code is a little simpler.
7908 *
7909 * # ith PLT code stub.
7910 * lis 11,(plt+(i-1)*4)@ha
7911 * lwz 11,(plt+(i-1)*4)@l(11)
7912 * mtctr 11
7913 * bctr
7914 *
7915 * The branch table is the same, then comes
7916 *
7917 * PLTresolve:
7918 * lis 12,(got+4)@ha
7919 * addis 11,11,(-res_0)@ha
7920 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7921 * addi 11,11,(-res_0)@l # r11 = index * 4
7922 * mtctr 0
7923 * add 0,11,11
7924 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7925 * add 11,0,11 # r11 = index * 12 = reloc offset.
7926 * bctr
7927 */
7928 static const unsigned int plt_resolve[] =
7929 {
7930 LIS_12,
7931 ADDIS_11_11,
7932 LWZ_0_12,
7933 ADDI_11_11,
7934 MTCTR_0,
7935 ADD_0_11_11,
7936 LWZ_12_12,
7937 ADD_11_0_11,
7938 BCTR,
7939 NOP,
7940 NOP,
7941 NOP,
7942 NOP,
7943 NOP,
7944 NOP,
7945 NOP
7946 };
7947
7948 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7949 abort ();
7950 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7951 abort ();
7952
7953 /* Build the branch table, one for each plt entry (less one),
7954 and perhaps some padding. */
7955 p = htab->glink->contents;
7956 p += htab->glink_pltresolve;
7957 endp = htab->glink->contents;
7958 endp += htab->glink->size - GLINK_PLTRESOLVE;
7959 while (p < endp - 8 * 4)
7960 {
7961 bfd_put_32 (output_bfd, B + endp - p, p);
7962 p += 4;
7963 }
7964 while (p < endp)
7965 {
7966 bfd_put_32 (output_bfd, NOP, p);
7967 p += 4;
7968 }
7969
7970 res0 = (htab->glink_pltresolve
7971 + htab->glink->output_section->vma
7972 + htab->glink->output_offset);
7973
7974 /* Last comes the PLTresolve stub. */
7975 if (info->shared || info->pie)
7976 {
7977 bfd_vma bcl;
7978
7979 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7980 {
7981 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7982 p += 4;
7983 }
7984 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7985
7986 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7987 + htab->glink->output_section->vma
7988 + htab->glink->output_offset);
7989
7990 bfd_put_32 (output_bfd,
7991 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7992 bfd_put_32 (output_bfd,
7993 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7994 bfd_put_32 (output_bfd,
7995 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7996 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7997 {
7998 bfd_put_32 (output_bfd,
7999 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8000 bfd_put_32 (output_bfd,
8001 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8002 }
8003 else
8004 {
8005 bfd_put_32 (output_bfd,
8006 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8007 bfd_put_32 (output_bfd,
8008 LWZ_12_12 + 4, p + 9*4);
8009 }
8010 }
8011 else
8012 {
8013 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8014 {
8015 bfd_put_32 (output_bfd, plt_resolve[i], p);
8016 p += 4;
8017 }
8018 p -= 4 * ARRAY_SIZE (plt_resolve);
8019
8020 bfd_put_32 (output_bfd,
8021 LIS_12 + PPC_HA (got + 4), p + 0*4);
8022 bfd_put_32 (output_bfd,
8023 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8024 bfd_put_32 (output_bfd,
8025 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8026 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8027 {
8028 bfd_put_32 (output_bfd,
8029 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8030 bfd_put_32 (output_bfd,
8031 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8032 }
8033 else
8034 {
8035 bfd_put_32 (output_bfd,
8036 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8037 bfd_put_32 (output_bfd,
8038 LWZ_12_12 + 4, p + 6*4);
8039 }
8040 }
8041 }
8042
8043 return ret;
8044 }
8045 \f
8046 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8047 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8048 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8049 #define TARGET_BIG_NAME "elf32-powerpc"
8050 #define ELF_ARCH bfd_arch_powerpc
8051 #define ELF_MACHINE_CODE EM_PPC
8052 #ifdef __QNXTARGET__
8053 #define ELF_MAXPAGESIZE 0x1000
8054 #else
8055 #define ELF_MAXPAGESIZE 0x10000
8056 #endif
8057 #define ELF_MINPAGESIZE 0x1000
8058 #define ELF_COMMONPAGESIZE 0x1000
8059 #define elf_info_to_howto ppc_elf_info_to_howto
8060
8061 #ifdef EM_CYGNUS_POWERPC
8062 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8063 #endif
8064
8065 #ifdef EM_PPC_OLD
8066 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8067 #endif
8068
8069 #define elf_backend_plt_not_loaded 1
8070 #define elf_backend_can_gc_sections 1
8071 #define elf_backend_can_refcount 1
8072 #define elf_backend_rela_normal 1
8073
8074 #define bfd_elf32_mkobject ppc_elf_mkobject
8075 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8076 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8077 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8078 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8079 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8080 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8081 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8082
8083 #define elf_backend_object_p ppc_elf_object_p
8084 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8085 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8086 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8087 #define elf_backend_relocate_section ppc_elf_relocate_section
8088 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8089 #define elf_backend_check_relocs ppc_elf_check_relocs
8090 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8091 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8092 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8093 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8094 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8095 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8096 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8097 #define elf_backend_fake_sections ppc_elf_fake_sections
8098 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8099 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8100 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8101 #define elf_backend_write_core_note ppc_elf_write_core_note
8102 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8103 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8104 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8105 #define elf_backend_write_section ppc_elf_write_section
8106 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8107 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8108 #define elf_backend_action_discarded ppc_elf_action_discarded
8109 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8110
8111 #include "elf32-target.h"
8112
8113 /* VxWorks Target */
8114
8115 #undef TARGET_LITTLE_SYM
8116 #undef TARGET_LITTLE_NAME
8117
8118 #undef TARGET_BIG_SYM
8119 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8120 #undef TARGET_BIG_NAME
8121 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8122
8123 /* VxWorks uses the elf default section flags for .plt. */
8124 static const struct bfd_elf_special_section *
8125 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8126 {
8127 if (sec->name == NULL)
8128 return NULL;
8129
8130 if (strcmp (sec->name, ".plt") == 0)
8131 return _bfd_elf_get_sec_type_attr (abfd, sec);
8132
8133 return ppc_elf_get_sec_type_attr (abfd, sec);
8134 }
8135
8136 /* Like ppc_elf_link_hash_table_create, but overrides
8137 appropriately for VxWorks. */
8138 static struct bfd_link_hash_table *
8139 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8140 {
8141 struct bfd_link_hash_table *ret;
8142
8143 ret = ppc_elf_link_hash_table_create (abfd);
8144 if (ret)
8145 {
8146 struct ppc_elf_link_hash_table *htab
8147 = (struct ppc_elf_link_hash_table *)ret;
8148 htab->is_vxworks = 1;
8149 htab->plt_type = PLT_VXWORKS;
8150 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8151 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8152 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8153 }
8154 return ret;
8155 }
8156
8157 /* Tweak magic VxWorks symbols as they are loaded. */
8158 static bfd_boolean
8159 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8160 struct bfd_link_info *info,
8161 Elf_Internal_Sym *sym,
8162 const char **namep ATTRIBUTE_UNUSED,
8163 flagword *flagsp ATTRIBUTE_UNUSED,
8164 asection **secp,
8165 bfd_vma *valp)
8166 {
8167 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8168 valp))
8169 return FALSE;
8170
8171 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8172 }
8173
8174 static void
8175 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8176 {
8177 ppc_elf_final_write_processing(abfd, linker);
8178 elf_vxworks_final_write_processing(abfd, linker);
8179 }
8180
8181 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8182 define it. */
8183 #undef elf_backend_want_plt_sym
8184 #define elf_backend_want_plt_sym 1
8185 #undef elf_backend_want_got_plt
8186 #define elf_backend_want_got_plt 1
8187 #undef elf_backend_got_symbol_offset
8188 #define elf_backend_got_symbol_offset 0
8189 #undef elf_backend_plt_not_loaded
8190 #define elf_backend_plt_not_loaded 0
8191 #undef elf_backend_plt_readonly
8192 #define elf_backend_plt_readonly 1
8193 #undef elf_backend_got_header_size
8194 #define elf_backend_got_header_size 12
8195
8196 #undef bfd_elf32_get_synthetic_symtab
8197
8198 #undef bfd_elf32_bfd_link_hash_table_create
8199 #define bfd_elf32_bfd_link_hash_table_create \
8200 ppc_elf_vxworks_link_hash_table_create
8201 #undef elf_backend_add_symbol_hook
8202 #define elf_backend_add_symbol_hook \
8203 ppc_elf_vxworks_add_symbol_hook
8204 #undef elf_backend_link_output_symbol_hook
8205 #define elf_backend_link_output_symbol_hook \
8206 elf_vxworks_link_output_symbol_hook
8207 #undef elf_backend_final_write_processing
8208 #define elf_backend_final_write_processing \
8209 ppc_elf_vxworks_final_write_processing
8210 #undef elf_backend_get_sec_type_attr
8211 #define elf_backend_get_sec_type_attr \
8212 ppc_elf_vxworks_get_sec_type_attr
8213 #undef elf_backend_emit_relocs
8214 #define elf_backend_emit_relocs \
8215 elf_vxworks_emit_relocs
8216
8217 #undef elf32_bed
8218 #define elf32_bed ppc_elf_vxworks_bed
8219
8220 #include "elf32-target.h"
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