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2008-11-20 Tristan Gingold <gingold@adacore.com>
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23
24 /* This file is based on a preliminary PowerPC ELF ABI. The
25 information may not match the final PowerPC ELF ABI. It includes
26 suggestions from the in-progress Embedded PowerPC ABI, and that
27 information may also not match. */
28
29 #include "sysdep.h"
30 #include <stdarg.h>
31 #include "bfd.h"
32 #include "bfdlink.h"
33 #include "libbfd.h"
34 #include "elf-bfd.h"
35 #include "elf/ppc.h"
36 #include "elf32-ppc.h"
37 #include "elf-vxworks.h"
38
39 /* RELA relocations are used here. */
40
41 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43 static bfd_reloc_status_type ppc_elf_unhandled_reloc
44 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
45
46 /* Branch prediction bit for branch taken relocs. */
47 #define BRANCH_PREDICT_BIT 0x200000
48 /* Mask to set RA in memory instructions. */
49 #define RA_REGISTER_MASK 0x001f0000
50 /* Value to shift register by to insert RA. */
51 #define RA_REGISTER_SHIFT 16
52
53 /* The name of the dynamic interpreter. This is put in the .interp
54 section. */
55 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
56
57 /* For old-style PLT. */
58 /* The number of single-slot PLT entries (the rest use two slots). */
59 #define PLT_NUM_SINGLE_ENTRIES 8192
60
61 /* For new-style .glink and .plt. */
62 #define GLINK_PLTRESOLVE 16*4
63 #define GLINK_ENTRY_SIZE 4*4
64
65 /* VxWorks uses its own plt layout, filled in by the static linker. */
66
67 /* The standard VxWorks PLT entry. */
68 #define VXWORKS_PLT_ENTRY_SIZE 32
69 static const bfd_vma ppc_elf_vxworks_plt_entry
70 [VXWORKS_PLT_ENTRY_SIZE / 4] =
71 {
72 0x3d800000, /* lis r12,0 */
73 0x818c0000, /* lwz r12,0(r12) */
74 0x7d8903a6, /* mtctr r12 */
75 0x4e800420, /* bctr */
76 0x39600000, /* li r11,0 */
77 0x48000000, /* b 14 <.PLT0resolve+0x4> */
78 0x60000000, /* nop */
79 0x60000000, /* nop */
80 };
81 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
82 [VXWORKS_PLT_ENTRY_SIZE / 4] =
83 {
84 0x3d9e0000, /* addis r12,r30,0 */
85 0x818c0000, /* lwz r12,0(r12) */
86 0x7d8903a6, /* mtctr r12 */
87 0x4e800420, /* bctr */
88 0x39600000, /* li r11,0 */
89 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
90 0x60000000, /* nop */
91 0x60000000, /* nop */
92 };
93
94 /* The initial VxWorks PLT entry. */
95 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
96 static const bfd_vma ppc_elf_vxworks_plt0_entry
97 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
98 {
99 0x3d800000, /* lis r12,0 */
100 0x398c0000, /* addi r12,r12,0 */
101 0x800c0008, /* lwz r0,8(r12) */
102 0x7c0903a6, /* mtctr r0 */
103 0x818c0004, /* lwz r12,4(r12) */
104 0x4e800420, /* bctr */
105 0x60000000, /* nop */
106 0x60000000, /* nop */
107 };
108 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
109 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
110 {
111 0x819e0008, /* lwz r12,8(r30) */
112 0x7d8903a6, /* mtctr r12 */
113 0x819e0004, /* lwz r12,4(r30) */
114 0x4e800420, /* bctr */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 0x60000000, /* nop */
118 0x60000000, /* nop */
119 };
120
121 /* For executables, we have some additional relocations in
122 .rela.plt.unloaded, for the kernel loader. */
123
124 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
125 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
126 /* The number of relocations in the PLTResolve slot. */
127 #define VXWORKS_PLTRESOLVE_RELOCS 2
128 /* The number of relocations in the PLTResolve slot when when creating
129 a shared library. */
130 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
131
132 /* Some instructions. */
133 #define ADDIS_11_11 0x3d6b0000
134 #define ADDIS_11_30 0x3d7e0000
135 #define ADDIS_12_12 0x3d8c0000
136 #define ADDI_11_11 0x396b0000
137 #define ADD_0_11_11 0x7c0b5a14
138 #define ADD_11_0_11 0x7d605a14
139 #define B 0x48000000
140 #define BCL_20_31 0x429f0005
141 #define BCTR 0x4e800420
142 #define LIS_11 0x3d600000
143 #define LIS_12 0x3d800000
144 #define LWZU_0_12 0x840c0000
145 #define LWZ_0_12 0x800c0000
146 #define LWZ_11_11 0x816b0000
147 #define LWZ_11_30 0x817e0000
148 #define LWZ_12_12 0x818c0000
149 #define MFLR_0 0x7c0802a6
150 #define MFLR_12 0x7d8802a6
151 #define MTCTR_0 0x7c0903a6
152 #define MTCTR_11 0x7d6903a6
153 #define MTLR_0 0x7c0803a6
154 #define NOP 0x60000000
155 #define SUB_11_11_12 0x7d6c5850
156
157 /* Offset of tp and dtp pointers from start of TLS block. */
158 #define TP_OFFSET 0x7000
159 #define DTP_OFFSET 0x8000
160
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 const char *name;
3772
3773 name = (bfd_elf_string_from_elf_section
3774 (abfd,
3775 elf_elfheader (abfd)->e_shstrndx,
3776 elf_section_data (sec)->rel_hdr.sh_name));
3777 if (name == NULL)
3778 return FALSE;
3779
3780 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
3781 && strcmp (bfd_get_section_name (abfd, sec),
3782 name + 5) == 0);
3783
3784 if (htab->elf.dynobj == NULL)
3785 htab->elf.dynobj = abfd;
3786 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3787 if (sreloc == NULL)
3788 {
3789 flagword flags;
3790
3791 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3792 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3793 | SEC_ALLOC | SEC_LOAD);
3794 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3795 name,
3796 flags);
3797 if (sreloc == NULL
3798 || ! bfd_set_section_alignment (htab->elf.dynobj,
3799 sreloc, 2))
3800 return FALSE;
3801 }
3802 elf_section_data (sec)->sreloc = sreloc;
3803 }
3804
3805 /* If this is a global symbol, we count the number of
3806 relocations we need for this symbol. */
3807 if (h != NULL)
3808 {
3809 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3810 }
3811 else
3812 {
3813 /* Track dynamic relocs needed for local syms too.
3814 We really need local syms available to do this
3815 easily. Oh well. */
3816
3817 asection *s;
3818 void *vpp;
3819
3820 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3821 sec, r_symndx);
3822 if (s == NULL)
3823 return FALSE;
3824
3825 vpp = &elf_section_data (s)->local_dynrel;
3826 head = (struct ppc_elf_dyn_relocs **) vpp;
3827 }
3828
3829 p = *head;
3830 if (p == NULL || p->sec != sec)
3831 {
3832 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3833 if (p == NULL)
3834 return FALSE;
3835 p->next = *head;
3836 *head = p;
3837 p->sec = sec;
3838 p->count = 0;
3839 p->pc_count = 0;
3840 }
3841
3842 p->count += 1;
3843 if (!must_be_dyn_reloc (info, r_type))
3844 p->pc_count += 1;
3845 }
3846
3847 break;
3848 }
3849 }
3850
3851 return TRUE;
3852 }
3853 \f
3854
3855 /* Merge object attributes from IBFD into OBFD. Raise an error if
3856 there are conflicting attributes. */
3857 static bfd_boolean
3858 ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
3859 {
3860 obj_attribute *in_attr, *in_attrs;
3861 obj_attribute *out_attr, *out_attrs;
3862
3863 if (!elf_known_obj_attributes_proc (obfd)[0].i)
3864 {
3865 /* This is the first object. Copy the attributes. */
3866 _bfd_elf_copy_obj_attributes (ibfd, obfd);
3867
3868 /* Use the Tag_null value to indicate the attributes have been
3869 initialized. */
3870 elf_known_obj_attributes_proc (obfd)[0].i = 1;
3871
3872 return TRUE;
3873 }
3874
3875 in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
3876 out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
3877
3878 /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
3879 non-conflicting ones. */
3880 in_attr = &in_attrs[Tag_GNU_Power_ABI_FP];
3881 out_attr = &out_attrs[Tag_GNU_Power_ABI_FP];
3882 if (in_attr->i != out_attr->i)
3883 {
3884 out_attr->type = 1;
3885 if (out_attr->i == 0)
3886 out_attr->i = in_attr->i;
3887 else if (in_attr->i == 0)
3888 ;
3889 else if (out_attr->i == 1 && in_attr->i == 2)
3890 _bfd_error_handler
3891 (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
3892 else if (out_attr->i == 1 && in_attr->i == 3)
3893 _bfd_error_handler
3894 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3895 obfd, ibfd);
3896 else if (out_attr->i == 3 && in_attr->i == 1)
3897 _bfd_error_handler
3898 (_("Warning: %B uses double-precision hard float, %B uses single-precision hard float"),
3899 ibfd, obfd);
3900 else if (out_attr->i == 3 && in_attr->i == 2)
3901 _bfd_error_handler
3902 (_("Warning: %B uses soft float, %B uses single-precision hard float"),
3903 ibfd, obfd);
3904 else if (out_attr->i == 2 && (in_attr->i == 1 || in_attr->i == 3))
3905 _bfd_error_handler
3906 (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
3907 else if (in_attr->i > 3)
3908 _bfd_error_handler
3909 (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
3910 in_attr->i);
3911 else
3912 _bfd_error_handler
3913 (_("Warning: %B uses unknown floating point ABI %d"), obfd,
3914 out_attr->i);
3915 }
3916
3917 /* Check for conflicting Tag_GNU_Power_ABI_Vector attributes and
3918 merge non-conflicting ones. */
3919 in_attr = &in_attrs[Tag_GNU_Power_ABI_Vector];
3920 out_attr = &out_attrs[Tag_GNU_Power_ABI_Vector];
3921 if (in_attr->i != out_attr->i)
3922 {
3923 const char *in_abi = NULL, *out_abi = NULL;
3924
3925 switch (in_attr->i)
3926 {
3927 case 1: in_abi = "generic"; break;
3928 case 2: in_abi = "AltiVec"; break;
3929 case 3: in_abi = "SPE"; break;
3930 }
3931
3932 switch (out_attr->i)
3933 {
3934 case 1: out_abi = "generic"; break;
3935 case 2: out_abi = "AltiVec"; break;
3936 case 3: out_abi = "SPE"; break;
3937 }
3938
3939 out_attr->type = 1;
3940 if (out_attr->i == 0)
3941 out_attr->i = in_attr->i;
3942 else if (in_attr->i == 0)
3943 ;
3944 /* For now, allow generic to transition to AltiVec or SPE
3945 without a warning. If GCC marked files with their stack
3946 alignment and used don't-care markings for files which are
3947 not affected by the vector ABI, we could warn about this
3948 case too. */
3949 else if (out_attr->i == 1)
3950 out_attr->i = in_attr->i;
3951 else if (in_attr->i == 1)
3952 ;
3953 else if (in_abi == NULL)
3954 _bfd_error_handler
3955 (_("Warning: %B uses unknown vector ABI %d"), ibfd,
3956 in_attr->i);
3957 else if (out_abi == NULL)
3958 _bfd_error_handler
3959 (_("Warning: %B uses unknown vector ABI %d"), obfd,
3960 in_attr->i);
3961 else
3962 _bfd_error_handler
3963 (_("Warning: %B uses vector ABI \"%s\", %B uses \"%s\""),
3964 ibfd, obfd, in_abi, out_abi);
3965 }
3966
3967 /* Check for conflicting Tag_GNU_Power_ABI_Struct_Return attributes
3968 and merge non-conflicting ones. */
3969 in_attr = &in_attrs[Tag_GNU_Power_ABI_Struct_Return];
3970 out_attr = &out_attrs[Tag_GNU_Power_ABI_Struct_Return];
3971 if (in_attr->i != out_attr->i)
3972 {
3973 out_attr->type = 1;
3974 if (out_attr->i == 0)
3975 out_attr->i = in_attr->i;
3976 else if (in_attr->i == 0)
3977 ;
3978 else if (out_attr->i == 1 && in_attr->i == 2)
3979 _bfd_error_handler
3980 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), obfd, ibfd);
3981 else if (out_attr->i == 2 && in_attr->i == 1)
3982 _bfd_error_handler
3983 (_("Warning: %B uses r3/r4 for small structure returns, %B uses memory"), ibfd, obfd);
3984 else if (in_attr->i > 2)
3985 _bfd_error_handler
3986 (_("Warning: %B uses unknown small structure return convention %d"), ibfd,
3987 in_attr->i);
3988 else
3989 _bfd_error_handler
3990 (_("Warning: %B uses unknown small structure return convention %d"), obfd,
3991 out_attr->i);
3992 }
3993
3994 /* Merge Tag_compatibility attributes and any common GNU ones. */
3995 _bfd_elf_merge_object_attributes (ibfd, obfd);
3996
3997 return TRUE;
3998 }
3999
4000 /* Merge backend specific data from an object file to the output
4001 object file when linking. */
4002
4003 static bfd_boolean
4004 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4005 {
4006 flagword old_flags;
4007 flagword new_flags;
4008 bfd_boolean error;
4009
4010 if (!is_ppc_elf (ibfd) || !is_ppc_elf (obfd))
4011 return TRUE;
4012
4013 /* Check if we have the same endianess. */
4014 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4015 return FALSE;
4016
4017 if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
4018 return FALSE;
4019
4020 new_flags = elf_elfheader (ibfd)->e_flags;
4021 old_flags = elf_elfheader (obfd)->e_flags;
4022 if (!elf_flags_init (obfd))
4023 {
4024 /* First call, no flags set. */
4025 elf_flags_init (obfd) = TRUE;
4026 elf_elfheader (obfd)->e_flags = new_flags;
4027 }
4028
4029 /* Compatible flags are ok. */
4030 else if (new_flags == old_flags)
4031 ;
4032
4033 /* Incompatible flags. */
4034 else
4035 {
4036 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
4037 to be linked with either. */
4038 error = FALSE;
4039 if ((new_flags & EF_PPC_RELOCATABLE) != 0
4040 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
4041 {
4042 error = TRUE;
4043 (*_bfd_error_handler)
4044 (_("%B: compiled with -mrelocatable and linked with "
4045 "modules compiled normally"), ibfd);
4046 }
4047 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
4048 && (old_flags & EF_PPC_RELOCATABLE) != 0)
4049 {
4050 error = TRUE;
4051 (*_bfd_error_handler)
4052 (_("%B: compiled normally and linked with "
4053 "modules compiled with -mrelocatable"), ibfd);
4054 }
4055
4056 /* The output is -mrelocatable-lib iff both the input files are. */
4057 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
4058 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
4059
4060 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
4061 but each input file is either -mrelocatable or -mrelocatable-lib. */
4062 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
4063 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
4064 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
4065 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
4066
4067 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
4068 any module uses it. */
4069 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
4070
4071 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4072 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
4073
4074 /* Warn about any other mismatches. */
4075 if (new_flags != old_flags)
4076 {
4077 error = TRUE;
4078 (*_bfd_error_handler)
4079 (_("%B: uses different e_flags (0x%lx) fields "
4080 "than previous modules (0x%lx)"),
4081 ibfd, (long) new_flags, (long) old_flags);
4082 }
4083
4084 if (error)
4085 {
4086 bfd_set_error (bfd_error_bad_value);
4087 return FALSE;
4088 }
4089 }
4090
4091 return TRUE;
4092 }
4093 \f
4094 /* Choose which PLT scheme to use, and set .plt flags appropriately.
4095 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
4096 int
4097 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
4098 struct bfd_link_info *info,
4099 enum ppc_elf_plt_type plt_style,
4100 int emit_stub_syms)
4101 {
4102 struct ppc_elf_link_hash_table *htab;
4103 flagword flags;
4104
4105 htab = ppc_elf_hash_table (info);
4106
4107 if (htab->plt_type == PLT_UNSET)
4108 {
4109 if (plt_style == PLT_OLD)
4110 htab->plt_type = PLT_OLD;
4111 else
4112 {
4113 bfd *ibfd;
4114 enum ppc_elf_plt_type plt_type = plt_style;
4115
4116 /* Look through the reloc flags left by ppc_elf_check_relocs.
4117 Use the old style bss plt if a file makes plt calls
4118 without using the new relocs, and if ld isn't given
4119 --secure-plt and we never see REL16 relocs. */
4120 if (plt_type == PLT_UNSET)
4121 plt_type = PLT_OLD;
4122 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link_next)
4123 if (is_ppc_elf (ibfd))
4124 {
4125 if (ppc_elf_tdata (ibfd)->has_rel16)
4126 plt_type = PLT_NEW;
4127 else if (ppc_elf_tdata (ibfd)->makes_plt_call)
4128 {
4129 plt_type = PLT_OLD;
4130 htab->old_bfd = ibfd;
4131 break;
4132 }
4133 }
4134 htab->plt_type = plt_type;
4135 }
4136 }
4137 if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
4138 info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
4139
4140 htab->emit_stub_syms = emit_stub_syms;
4141
4142 BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
4143
4144 if (htab->plt_type == PLT_NEW)
4145 {
4146 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
4147 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
4148
4149 /* The new PLT is a loaded section. */
4150 if (htab->plt != NULL
4151 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
4152 return -1;
4153
4154 /* The new GOT is not executable. */
4155 if (htab->got != NULL
4156 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
4157 return -1;
4158 }
4159 else
4160 {
4161 /* Stop an unused .glink section from affecting .text alignment. */
4162 if (htab->glink != NULL
4163 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
4164 return -1;
4165 }
4166 return htab->plt_type == PLT_NEW;
4167 }
4168 \f
4169 /* Return the section that should be marked against GC for a given
4170 relocation. */
4171
4172 static asection *
4173 ppc_elf_gc_mark_hook (asection *sec,
4174 struct bfd_link_info *info,
4175 Elf_Internal_Rela *rel,
4176 struct elf_link_hash_entry *h,
4177 Elf_Internal_Sym *sym)
4178 {
4179 if (h != NULL)
4180 switch (ELF32_R_TYPE (rel->r_info))
4181 {
4182 case R_PPC_GNU_VTINHERIT:
4183 case R_PPC_GNU_VTENTRY:
4184 return NULL;
4185 }
4186
4187 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
4188 }
4189
4190 /* Update the got, plt and dynamic reloc reference counts for the
4191 section being removed. */
4192
4193 static bfd_boolean
4194 ppc_elf_gc_sweep_hook (bfd *abfd,
4195 struct bfd_link_info *info,
4196 asection *sec,
4197 const Elf_Internal_Rela *relocs)
4198 {
4199 struct ppc_elf_link_hash_table *htab;
4200 Elf_Internal_Shdr *symtab_hdr;
4201 struct elf_link_hash_entry **sym_hashes;
4202 bfd_signed_vma *local_got_refcounts;
4203 const Elf_Internal_Rela *rel, *relend;
4204 asection *got2;
4205
4206 if (info->relocatable)
4207 return TRUE;
4208
4209 if ((sec->flags & SEC_ALLOC) == 0)
4210 return TRUE;
4211
4212 elf_section_data (sec)->local_dynrel = NULL;
4213
4214 htab = ppc_elf_hash_table (info);
4215 symtab_hdr = &elf_symtab_hdr (abfd);
4216 sym_hashes = elf_sym_hashes (abfd);
4217 local_got_refcounts = elf_local_got_refcounts (abfd);
4218 got2 = bfd_get_section_by_name (abfd, ".got2");
4219
4220 relend = relocs + sec->reloc_count;
4221 for (rel = relocs; rel < relend; rel++)
4222 {
4223 unsigned long r_symndx;
4224 enum elf_ppc_reloc_type r_type;
4225 struct elf_link_hash_entry *h = NULL;
4226
4227 r_symndx = ELF32_R_SYM (rel->r_info);
4228 if (r_symndx >= symtab_hdr->sh_info)
4229 {
4230 struct ppc_elf_dyn_relocs **pp, *p;
4231 struct ppc_elf_link_hash_entry *eh;
4232
4233 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4234 while (h->root.type == bfd_link_hash_indirect
4235 || h->root.type == bfd_link_hash_warning)
4236 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4237 eh = (struct ppc_elf_link_hash_entry *) h;
4238
4239 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4240 if (p->sec == sec)
4241 {
4242 /* Everything must go for SEC. */
4243 *pp = p->next;
4244 break;
4245 }
4246 }
4247
4248 r_type = ELF32_R_TYPE (rel->r_info);
4249 switch (r_type)
4250 {
4251 case R_PPC_GOT_TLSLD16:
4252 case R_PPC_GOT_TLSLD16_LO:
4253 case R_PPC_GOT_TLSLD16_HI:
4254 case R_PPC_GOT_TLSLD16_HA:
4255 case R_PPC_GOT_TLSGD16:
4256 case R_PPC_GOT_TLSGD16_LO:
4257 case R_PPC_GOT_TLSGD16_HI:
4258 case R_PPC_GOT_TLSGD16_HA:
4259 case R_PPC_GOT_TPREL16:
4260 case R_PPC_GOT_TPREL16_LO:
4261 case R_PPC_GOT_TPREL16_HI:
4262 case R_PPC_GOT_TPREL16_HA:
4263 case R_PPC_GOT_DTPREL16:
4264 case R_PPC_GOT_DTPREL16_LO:
4265 case R_PPC_GOT_DTPREL16_HI:
4266 case R_PPC_GOT_DTPREL16_HA:
4267 case R_PPC_GOT16:
4268 case R_PPC_GOT16_LO:
4269 case R_PPC_GOT16_HI:
4270 case R_PPC_GOT16_HA:
4271 if (h != NULL)
4272 {
4273 if (h->got.refcount > 0)
4274 h->got.refcount--;
4275 }
4276 else if (local_got_refcounts != NULL)
4277 {
4278 if (local_got_refcounts[r_symndx] > 0)
4279 local_got_refcounts[r_symndx]--;
4280 }
4281 break;
4282
4283 case R_PPC_REL24:
4284 case R_PPC_REL14:
4285 case R_PPC_REL14_BRTAKEN:
4286 case R_PPC_REL14_BRNTAKEN:
4287 case R_PPC_REL32:
4288 if (h == NULL || h == htab->elf.hgot)
4289 break;
4290 /* Fall thru */
4291
4292 case R_PPC_ADDR32:
4293 case R_PPC_ADDR24:
4294 case R_PPC_ADDR16:
4295 case R_PPC_ADDR16_LO:
4296 case R_PPC_ADDR16_HI:
4297 case R_PPC_ADDR16_HA:
4298 case R_PPC_ADDR14:
4299 case R_PPC_ADDR14_BRTAKEN:
4300 case R_PPC_ADDR14_BRNTAKEN:
4301 case R_PPC_UADDR32:
4302 case R_PPC_UADDR16:
4303 if (info->shared)
4304 break;
4305
4306 case R_PPC_PLT32:
4307 case R_PPC_PLTREL24:
4308 case R_PPC_PLTREL32:
4309 case R_PPC_PLT16_LO:
4310 case R_PPC_PLT16_HI:
4311 case R_PPC_PLT16_HA:
4312 if (h != NULL)
4313 {
4314 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
4315 struct plt_entry *ent = find_plt_ent (h, got2, addend);
4316 if (ent->plt.refcount > 0)
4317 ent->plt.refcount -= 1;
4318 }
4319 break;
4320
4321 default:
4322 break;
4323 }
4324 }
4325 return TRUE;
4326 }
4327 \f
4328 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
4329
4330 asection *
4331 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
4332 {
4333 struct ppc_elf_link_hash_table *htab;
4334
4335 htab = ppc_elf_hash_table (info);
4336 if (htab->plt_type == PLT_NEW
4337 && htab->plt != NULL
4338 && htab->plt->output_section != NULL)
4339 {
4340 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
4341 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
4342 }
4343
4344 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
4345 FALSE, FALSE, TRUE);
4346 return _bfd_elf_tls_setup (obfd, info);
4347 }
4348
4349 /* Run through all the TLS relocs looking for optimization
4350 opportunities. */
4351
4352 bfd_boolean
4353 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
4354 struct bfd_link_info *info)
4355 {
4356 bfd *ibfd;
4357 asection *sec;
4358 struct ppc_elf_link_hash_table *htab;
4359 int pass;
4360
4361 if (info->relocatable || !info->executable)
4362 return TRUE;
4363
4364 htab = ppc_elf_hash_table (info);
4365 /* Make two passes through the relocs. First time check that tls
4366 relocs involved in setting up a tls_get_addr call are indeed
4367 followed by such a call. If they are not, exclude them from
4368 the optimizations done on the second pass. */
4369 for (pass = 0; pass < 2; ++pass)
4370 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4371 {
4372 Elf_Internal_Sym *locsyms = NULL;
4373 Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
4374
4375 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4376 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
4377 {
4378 Elf_Internal_Rela *relstart, *rel, *relend;
4379
4380 /* Read the relocations. */
4381 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
4382 info->keep_memory);
4383 if (relstart == NULL)
4384 return FALSE;
4385
4386 relend = relstart + sec->reloc_count;
4387 for (rel = relstart; rel < relend; rel++)
4388 {
4389 enum elf_ppc_reloc_type r_type;
4390 unsigned long r_symndx;
4391 struct elf_link_hash_entry *h = NULL;
4392 char *tls_mask;
4393 char tls_set, tls_clear;
4394 bfd_boolean is_local;
4395 int expecting_tls_get_addr;
4396 bfd_signed_vma *got_count;
4397
4398 r_symndx = ELF32_R_SYM (rel->r_info);
4399 if (r_symndx >= symtab_hdr->sh_info)
4400 {
4401 struct elf_link_hash_entry **sym_hashes;
4402
4403 sym_hashes = elf_sym_hashes (ibfd);
4404 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4405 while (h->root.type == bfd_link_hash_indirect
4406 || h->root.type == bfd_link_hash_warning)
4407 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4408 }
4409
4410 expecting_tls_get_addr = 0;
4411 is_local = FALSE;
4412 if (h == NULL
4413 || !h->def_dynamic)
4414 is_local = TRUE;
4415
4416 r_type = ELF32_R_TYPE (rel->r_info);
4417 switch (r_type)
4418 {
4419 case R_PPC_GOT_TLSLD16:
4420 case R_PPC_GOT_TLSLD16_LO:
4421 expecting_tls_get_addr = 1;
4422 /* Fall thru */
4423
4424 case R_PPC_GOT_TLSLD16_HI:
4425 case R_PPC_GOT_TLSLD16_HA:
4426 /* These relocs should never be against a symbol
4427 defined in a shared lib. Leave them alone if
4428 that turns out to be the case. */
4429 if (!is_local)
4430 continue;
4431
4432 /* LD -> LE */
4433 tls_set = 0;
4434 tls_clear = TLS_LD;
4435 break;
4436
4437 case R_PPC_GOT_TLSGD16:
4438 case R_PPC_GOT_TLSGD16_LO:
4439 expecting_tls_get_addr = 1;
4440 /* Fall thru */
4441
4442 case R_PPC_GOT_TLSGD16_HI:
4443 case R_PPC_GOT_TLSGD16_HA:
4444 if (is_local)
4445 /* GD -> LE */
4446 tls_set = 0;
4447 else
4448 /* GD -> IE */
4449 tls_set = TLS_TLS | TLS_TPRELGD;
4450 tls_clear = TLS_GD;
4451 break;
4452
4453 case R_PPC_GOT_TPREL16:
4454 case R_PPC_GOT_TPREL16_LO:
4455 case R_PPC_GOT_TPREL16_HI:
4456 case R_PPC_GOT_TPREL16_HA:
4457 if (is_local)
4458 {
4459 /* IE -> LE */
4460 tls_set = 0;
4461 tls_clear = TLS_TPREL;
4462 break;
4463 }
4464 else
4465 continue;
4466
4467 default:
4468 continue;
4469 }
4470
4471 if (pass == 0)
4472 {
4473 if (!expecting_tls_get_addr)
4474 continue;
4475
4476 if (rel + 1 < relend)
4477 {
4478 enum elf_ppc_reloc_type r_type2;
4479 unsigned long r_symndx2;
4480 struct elf_link_hash_entry *h2;
4481
4482 /* The next instruction should be a call to
4483 __tls_get_addr. Peek at the reloc to be sure. */
4484 r_type2 = ELF32_R_TYPE (rel[1].r_info);
4485 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
4486 if (r_symndx2 >= symtab_hdr->sh_info
4487 && (r_type2 == R_PPC_REL14
4488 || r_type2 == R_PPC_REL14_BRTAKEN
4489 || r_type2 == R_PPC_REL14_BRNTAKEN
4490 || r_type2 == R_PPC_REL24
4491 || r_type2 == R_PPC_PLTREL24))
4492 {
4493 struct elf_link_hash_entry **sym_hashes;
4494
4495 sym_hashes = elf_sym_hashes (ibfd);
4496 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
4497 while (h2->root.type == bfd_link_hash_indirect
4498 || h2->root.type == bfd_link_hash_warning)
4499 h2 = ((struct elf_link_hash_entry *)
4500 h2->root.u.i.link);
4501 if (h2 == htab->tls_get_addr)
4502 continue;
4503 }
4504 }
4505
4506 /* Uh oh, we didn't find the expected call. We
4507 could just mark this symbol to exclude it
4508 from tls optimization but it's safer to skip
4509 the entire section. */
4510 sec->has_tls_reloc = 0;
4511 break;
4512 }
4513
4514 if (h != NULL)
4515 {
4516 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
4517 got_count = &h->got.refcount;
4518 }
4519 else
4520 {
4521 Elf_Internal_Sym *sym;
4522 bfd_signed_vma *lgot_refs;
4523 char *lgot_masks;
4524
4525 if (locsyms == NULL)
4526 {
4527 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
4528 if (locsyms == NULL)
4529 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
4530 symtab_hdr->sh_info,
4531 0, NULL, NULL, NULL);
4532 if (locsyms == NULL)
4533 {
4534 if (elf_section_data (sec)->relocs != relstart)
4535 free (relstart);
4536 return FALSE;
4537 }
4538 }
4539 sym = locsyms + r_symndx;
4540 lgot_refs = elf_local_got_refcounts (ibfd);
4541 if (lgot_refs == NULL)
4542 abort ();
4543 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4544 tls_mask = &lgot_masks[r_symndx];
4545 got_count = &lgot_refs[r_symndx];
4546 }
4547
4548 if (tls_set == 0)
4549 {
4550 /* We managed to get rid of a got entry. */
4551 if (*got_count > 0)
4552 *got_count -= 1;
4553 }
4554
4555 if (expecting_tls_get_addr)
4556 {
4557 struct plt_entry *ent;
4558
4559 ent = find_plt_ent (htab->tls_get_addr, NULL, 0);
4560 if (ent != NULL && ent->plt.refcount > 0)
4561 ent->plt.refcount -= 1;
4562 }
4563
4564 *tls_mask |= tls_set;
4565 *tls_mask &= ~tls_clear;
4566 }
4567
4568 if (elf_section_data (sec)->relocs != relstart)
4569 free (relstart);
4570 }
4571
4572 if (locsyms != NULL
4573 && (symtab_hdr->contents != (unsigned char *) locsyms))
4574 {
4575 if (!info->keep_memory)
4576 free (locsyms);
4577 else
4578 symtab_hdr->contents = (unsigned char *) locsyms;
4579 }
4580 }
4581 return TRUE;
4582 }
4583 \f
4584 /* Return true if we have dynamic relocs that apply to read-only sections. */
4585
4586 static bfd_boolean
4587 readonly_dynrelocs (struct elf_link_hash_entry *h)
4588 {
4589 struct ppc_elf_dyn_relocs *p;
4590
4591 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4592 {
4593 asection *s = p->sec->output_section;
4594
4595 if (s != NULL
4596 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4597 == (SEC_READONLY | SEC_ALLOC)))
4598 return TRUE;
4599 }
4600 return FALSE;
4601 }
4602
4603 /* Adjust a symbol defined by a dynamic object and referenced by a
4604 regular object. The current definition is in some section of the
4605 dynamic object, but we're not including those sections. We have to
4606 change the definition to something the rest of the link can
4607 understand. */
4608
4609 static bfd_boolean
4610 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4611 struct elf_link_hash_entry *h)
4612 {
4613 struct ppc_elf_link_hash_table *htab;
4614 asection *s;
4615
4616 #ifdef DEBUG
4617 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4618 h->root.root.string);
4619 #endif
4620
4621 /* Make sure we know what is going on here. */
4622 htab = ppc_elf_hash_table (info);
4623 BFD_ASSERT (htab->elf.dynobj != NULL
4624 && (h->needs_plt
4625 || h->u.weakdef != NULL
4626 || (h->def_dynamic
4627 && h->ref_regular
4628 && !h->def_regular)));
4629
4630 /* Deal with function syms. */
4631 if (h->type == STT_FUNC
4632 || h->needs_plt)
4633 {
4634 /* Clear procedure linkage table information for any symbol that
4635 won't need a .plt entry. */
4636 struct plt_entry *ent;
4637 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4638 if (ent->plt.refcount > 0)
4639 break;
4640 if (ent == NULL
4641 || SYMBOL_CALLS_LOCAL (info, h)
4642 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4643 && h->root.type == bfd_link_hash_undefweak))
4644 {
4645 /* A PLT entry is not required/allowed when:
4646
4647 1. We are not using ld.so; because then the PLT entry
4648 can't be set up, so we can't use one. In this case,
4649 ppc_elf_adjust_dynamic_symbol won't even be called.
4650
4651 2. GC has rendered the entry unused.
4652
4653 3. We know for certain that a call to this symbol
4654 will go to this object, or will remain undefined. */
4655 h->plt.plist = NULL;
4656 h->needs_plt = 0;
4657 }
4658 else
4659 {
4660 /* After adjust_dynamic_symbol, non_got_ref set means that
4661 dyn_relocs for this symbol should be discarded.
4662 If we get here we know we are making a PLT entry for this
4663 symbol, and in an executable we'd normally resolve
4664 relocations against this symbol to the PLT entry. Allow
4665 dynamic relocs if the reference is weak, and the dynamic
4666 relocs will not cause text relocation. */
4667 if (!h->ref_regular_nonweak
4668 && h->non_got_ref
4669 && !htab->is_vxworks
4670 && !ppc_elf_hash_entry (h)->has_sda_refs
4671 && !readonly_dynrelocs (h))
4672 h->non_got_ref = 0;
4673 }
4674 return TRUE;
4675 }
4676 else
4677 h->plt.plist = NULL;
4678
4679 /* If this is a weak symbol, and there is a real definition, the
4680 processor independent code will have arranged for us to see the
4681 real definition first, and we can just use the same value. */
4682 if (h->u.weakdef != NULL)
4683 {
4684 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4685 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4686 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4687 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4688 if (ELIMINATE_COPY_RELOCS)
4689 h->non_got_ref = h->u.weakdef->non_got_ref;
4690 return TRUE;
4691 }
4692
4693 /* This is a reference to a symbol defined by a dynamic object which
4694 is not a function. */
4695
4696 /* If we are creating a shared library, we must presume that the
4697 only references to the symbol are via the global offset table.
4698 For such cases we need not do anything here; the relocations will
4699 be handled correctly by relocate_section. */
4700 if (info->shared)
4701 return TRUE;
4702
4703 /* If there are no references to this symbol that do not use the
4704 GOT, we don't need to generate a copy reloc. */
4705 if (!h->non_got_ref)
4706 return TRUE;
4707
4708 /* If we didn't find any dynamic relocs in read-only sections, then
4709 we'll be keeping the dynamic relocs and avoiding the copy reloc.
4710 We can't do this if there are any small data relocations. This
4711 doesn't work on VxWorks, where we can not have dynamic
4712 relocations (other than copy and jump slot relocations) in an
4713 executable. */
4714 if (ELIMINATE_COPY_RELOCS
4715 && !ppc_elf_hash_entry (h)->has_sda_refs
4716 && !htab->is_vxworks
4717 && !h->def_regular
4718 && !readonly_dynrelocs (h))
4719 {
4720 h->non_got_ref = 0;
4721 return TRUE;
4722 }
4723
4724 if (h->size == 0)
4725 {
4726 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4727 h->root.root.string);
4728 return TRUE;
4729 }
4730
4731 /* We must allocate the symbol in our .dynbss section, which will
4732 become part of the .bss section of the executable. There will be
4733 an entry for this symbol in the .dynsym section. The dynamic
4734 object will contain position independent code, so all references
4735 from the dynamic object to this symbol will go through the global
4736 offset table. The dynamic linker will use the .dynsym entry to
4737 determine the address it must put in the global offset table, so
4738 both the dynamic object and the regular object will refer to the
4739 same memory location for the variable.
4740
4741 Of course, if the symbol is referenced using SDAREL relocs, we
4742 must instead allocate it in .sbss. */
4743
4744 if (ppc_elf_hash_entry (h)->has_sda_refs)
4745 s = htab->dynsbss;
4746 else
4747 s = htab->dynbss;
4748 BFD_ASSERT (s != NULL);
4749
4750 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4751 copy the initial value out of the dynamic object and into the
4752 runtime process image. We need to remember the offset into the
4753 .rela.bss section we are going to use. */
4754 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4755 {
4756 asection *srel;
4757
4758 if (ppc_elf_hash_entry (h)->has_sda_refs)
4759 srel = htab->relsbss;
4760 else
4761 srel = htab->relbss;
4762 BFD_ASSERT (srel != NULL);
4763 srel->size += sizeof (Elf32_External_Rela);
4764 h->needs_copy = 1;
4765 }
4766
4767 return _bfd_elf_adjust_dynamic_copy (h, s);
4768 }
4769 \f
4770 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4771 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4772 specifying the addend on the plt relocation. For -fpic code, the sym
4773 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4774 xxxxxxxx.got2.plt_pic32.<callee>. */
4775
4776 static bfd_boolean
4777 add_stub_sym (struct plt_entry *ent,
4778 struct elf_link_hash_entry *h,
4779 struct bfd_link_info *info)
4780 {
4781 struct elf_link_hash_entry *sh;
4782 size_t len1, len2, len3;
4783 char *name;
4784 const char *stub;
4785 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4786
4787 if (info->shared || info->pie)
4788 stub = ".plt_pic32.";
4789 else
4790 stub = ".plt_call32.";
4791
4792 len1 = strlen (h->root.root.string);
4793 len2 = strlen (stub);
4794 len3 = 0;
4795 if (ent->sec)
4796 len3 = strlen (ent->sec->name);
4797 name = bfd_malloc (len1 + len2 + len3 + 9);
4798 if (name == NULL)
4799 return FALSE;
4800 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4801 if (ent->sec)
4802 memcpy (name + 8, ent->sec->name, len3);
4803 memcpy (name + 8 + len3, stub, len2);
4804 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4805 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4806 if (sh == NULL)
4807 return FALSE;
4808 if (sh->root.type == bfd_link_hash_new)
4809 {
4810 sh->root.type = bfd_link_hash_defined;
4811 sh->root.u.def.section = htab->glink;
4812 sh->root.u.def.value = ent->glink_offset;
4813 sh->ref_regular = 1;
4814 sh->def_regular = 1;
4815 sh->ref_regular_nonweak = 1;
4816 sh->forced_local = 1;
4817 sh->non_elf = 0;
4818 }
4819 return TRUE;
4820 }
4821
4822 /* Allocate NEED contiguous space in .got, and return the offset.
4823 Handles allocation of the got header when crossing 32k. */
4824
4825 static bfd_vma
4826 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4827 {
4828 bfd_vma where;
4829 unsigned int max_before_header;
4830
4831 if (htab->plt_type == PLT_VXWORKS)
4832 {
4833 where = htab->got->size;
4834 htab->got->size += need;
4835 }
4836 else
4837 {
4838 max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
4839 if (need <= htab->got_gap)
4840 {
4841 where = max_before_header - htab->got_gap;
4842 htab->got_gap -= need;
4843 }
4844 else
4845 {
4846 if (htab->got->size + need > max_before_header
4847 && htab->got->size <= max_before_header)
4848 {
4849 htab->got_gap = max_before_header - htab->got->size;
4850 htab->got->size = max_before_header + htab->got_header_size;
4851 }
4852 where = htab->got->size;
4853 htab->got->size += need;
4854 }
4855 }
4856 return where;
4857 }
4858
4859 /* Allocate space in associated reloc sections for dynamic relocs. */
4860
4861 static bfd_boolean
4862 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4863 {
4864 struct bfd_link_info *info = inf;
4865 struct ppc_elf_link_hash_entry *eh;
4866 struct ppc_elf_link_hash_table *htab;
4867 struct ppc_elf_dyn_relocs *p;
4868
4869 if (h->root.type == bfd_link_hash_indirect)
4870 return TRUE;
4871
4872 if (h->root.type == bfd_link_hash_warning)
4873 /* When warning symbols are created, they **replace** the "real"
4874 entry in the hash table, thus we never get to see the real
4875 symbol in a hash traversal. So look at it now. */
4876 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4877
4878 htab = ppc_elf_hash_table (info);
4879 if (htab->elf.dynamic_sections_created)
4880 {
4881 struct plt_entry *ent;
4882 bfd_boolean doneone = FALSE;
4883 bfd_vma plt_offset = 0, glink_offset = 0;
4884
4885 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4886 if (ent->plt.refcount > 0)
4887 {
4888 /* Make sure this symbol is output as a dynamic symbol. */
4889 if (h->dynindx == -1
4890 && !h->forced_local)
4891 {
4892 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4893 return FALSE;
4894 }
4895
4896 if (info->shared
4897 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4898 {
4899 asection *s = htab->plt;
4900
4901 if (htab->plt_type == PLT_NEW)
4902 {
4903 if (!doneone)
4904 {
4905 plt_offset = s->size;
4906 s->size += 4;
4907 }
4908 ent->plt.offset = plt_offset;
4909
4910 s = htab->glink;
4911 if (!doneone || info->shared || info->pie)
4912 {
4913 glink_offset = s->size;
4914 s->size += GLINK_ENTRY_SIZE;
4915 }
4916 if (!doneone
4917 && !info->shared
4918 && h->def_dynamic
4919 && !h->def_regular)
4920 {
4921 h->root.u.def.section = s;
4922 h->root.u.def.value = glink_offset;
4923 }
4924 ent->glink_offset = glink_offset;
4925
4926 if (htab->emit_stub_syms
4927 && !add_stub_sym (ent, h, info))
4928 return FALSE;
4929 }
4930 else
4931 {
4932 if (!doneone)
4933 {
4934 /* If this is the first .plt entry, make room
4935 for the special first entry. */
4936 if (s->size == 0)
4937 s->size += htab->plt_initial_entry_size;
4938
4939 /* The PowerPC PLT is actually composed of two
4940 parts, the first part is 2 words (for a load
4941 and a jump), and then there is a remaining
4942 word available at the end. */
4943 plt_offset = (htab->plt_initial_entry_size
4944 + (htab->plt_slot_size
4945 * ((s->size
4946 - htab->plt_initial_entry_size)
4947 / htab->plt_entry_size)));
4948
4949 /* If this symbol is not defined in a regular
4950 file, and we are not generating a shared
4951 library, then set the symbol to this location
4952 in the .plt. This is required to make
4953 function pointers compare as equal between
4954 the normal executable and the shared library. */
4955 if (! info->shared
4956 && h->def_dynamic
4957 && !h->def_regular)
4958 {
4959 h->root.u.def.section = s;
4960 h->root.u.def.value = plt_offset;
4961 }
4962
4963 /* Make room for this entry. */
4964 s->size += htab->plt_entry_size;
4965 /* After the 8192nd entry, room for two entries
4966 is allocated. */
4967 if (htab->plt_type == PLT_OLD
4968 && (s->size - htab->plt_initial_entry_size)
4969 / htab->plt_entry_size
4970 > PLT_NUM_SINGLE_ENTRIES)
4971 s->size += htab->plt_entry_size;
4972 }
4973 ent->plt.offset = plt_offset;
4974 }
4975
4976 /* We also need to make an entry in the .rela.plt section. */
4977 if (!doneone)
4978 {
4979 htab->relplt->size += sizeof (Elf32_External_Rela);
4980
4981 if (htab->plt_type == PLT_VXWORKS)
4982 {
4983 /* Allocate space for the unloaded relocations. */
4984 if (!info->shared)
4985 {
4986 if (ent->plt.offset
4987 == (bfd_vma) htab->plt_initial_entry_size)
4988 {
4989 htab->srelplt2->size
4990 += sizeof (Elf32_External_Rela)
4991 * VXWORKS_PLTRESOLVE_RELOCS;
4992 }
4993
4994 htab->srelplt2->size
4995 += sizeof (Elf32_External_Rela)
4996 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4997 }
4998
4999 /* Every PLT entry has an associated GOT entry in
5000 .got.plt. */
5001 htab->sgotplt->size += 4;
5002 }
5003 doneone = TRUE;
5004 }
5005 }
5006 else
5007 ent->plt.offset = (bfd_vma) -1;
5008 }
5009 else
5010 ent->plt.offset = (bfd_vma) -1;
5011
5012 if (!doneone)
5013 {
5014 h->plt.plist = NULL;
5015 h->needs_plt = 0;
5016 }
5017 }
5018 else
5019 {
5020 h->plt.plist = NULL;
5021 h->needs_plt = 0;
5022 }
5023
5024 eh = (struct ppc_elf_link_hash_entry *) h;
5025 if (eh->elf.got.refcount > 0)
5026 {
5027 bfd_boolean dyn;
5028 unsigned int need;
5029
5030 /* Make sure this symbol is output as a dynamic symbol. */
5031 if (eh->elf.dynindx == -1
5032 && !eh->elf.forced_local
5033 && htab->elf.dynamic_sections_created)
5034 {
5035 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
5036 return FALSE;
5037 }
5038
5039 need = 0;
5040 if ((eh->tls_mask & TLS_TLS) != 0)
5041 {
5042 if ((eh->tls_mask & TLS_LD) != 0)
5043 {
5044 if (!eh->elf.def_dynamic)
5045 /* We'll just use htab->tlsld_got.offset. This should
5046 always be the case. It's a little odd if we have
5047 a local dynamic reloc against a non-local symbol. */
5048 htab->tlsld_got.refcount += 1;
5049 else
5050 need += 8;
5051 }
5052 if ((eh->tls_mask & TLS_GD) != 0)
5053 need += 8;
5054 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
5055 need += 4;
5056 if ((eh->tls_mask & TLS_DTPREL) != 0)
5057 need += 4;
5058 }
5059 else
5060 need += 4;
5061 if (need == 0)
5062 eh->elf.got.offset = (bfd_vma) -1;
5063 else
5064 {
5065 eh->elf.got.offset = allocate_got (htab, need);
5066 dyn = htab->elf.dynamic_sections_created;
5067 if ((info->shared
5068 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
5069 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
5070 || eh->elf.root.type != bfd_link_hash_undefweak))
5071 {
5072 /* All the entries we allocated need relocs.
5073 Except LD only needs one. */
5074 if ((eh->tls_mask & TLS_LD) != 0
5075 && eh->elf.def_dynamic)
5076 need -= 4;
5077 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
5078 }
5079 }
5080 }
5081 else
5082 eh->elf.got.offset = (bfd_vma) -1;
5083
5084 if (eh->dyn_relocs == NULL
5085 || !htab->elf.dynamic_sections_created)
5086 return TRUE;
5087
5088 /* In the shared -Bsymbolic case, discard space allocated for
5089 dynamic pc-relative relocs against symbols which turn out to be
5090 defined in regular objects. For the normal shared case, discard
5091 space for relocs that have become local due to symbol visibility
5092 changes. */
5093
5094 if (info->shared)
5095 {
5096 /* Relocs that use pc_count are those that appear on a call insn,
5097 or certain REL relocs (see must_be_dyn_reloc) that can be
5098 generated via assembly. We want calls to protected symbols to
5099 resolve directly to the function rather than going via the plt.
5100 If people want function pointer comparisons to work as expected
5101 then they should avoid writing weird assembly. */
5102 if (SYMBOL_CALLS_LOCAL (info, h))
5103 {
5104 struct ppc_elf_dyn_relocs **pp;
5105
5106 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5107 {
5108 p->count -= p->pc_count;
5109 p->pc_count = 0;
5110 if (p->count == 0)
5111 *pp = p->next;
5112 else
5113 pp = &p->next;
5114 }
5115 }
5116
5117 if (htab->is_vxworks)
5118 {
5119 struct ppc_elf_dyn_relocs **pp;
5120
5121 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
5122 {
5123 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
5124 *pp = p->next;
5125 else
5126 pp = &p->next;
5127 }
5128 }
5129
5130 /* Discard relocs on undefined symbols that must be local. */
5131 if (eh->dyn_relocs != NULL
5132 && h->root.type == bfd_link_hash_undefined
5133 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
5134 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
5135 eh->dyn_relocs = NULL;
5136
5137 /* Also discard relocs on undefined weak syms with non-default
5138 visibility. */
5139 if (eh->dyn_relocs != NULL
5140 && h->root.type == bfd_link_hash_undefweak)
5141 {
5142 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5143 eh->dyn_relocs = NULL;
5144
5145 /* Make sure undefined weak symbols are output as a dynamic
5146 symbol in PIEs. */
5147 else if (h->dynindx == -1
5148 && !h->forced_local)
5149 {
5150 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5151 return FALSE;
5152 }
5153 }
5154 }
5155 else if (ELIMINATE_COPY_RELOCS)
5156 {
5157 /* For the non-shared case, discard space for relocs against
5158 symbols which turn out to need copy relocs or are not
5159 dynamic. */
5160
5161 if (!h->non_got_ref
5162 && !h->def_regular)
5163 {
5164 /* Make sure this symbol is output as a dynamic symbol.
5165 Undefined weak syms won't yet be marked as dynamic. */
5166 if (h->dynindx == -1
5167 && !h->forced_local)
5168 {
5169 if (! bfd_elf_link_record_dynamic_symbol (info, h))
5170 return FALSE;
5171 }
5172
5173 /* If that succeeded, we know we'll be keeping all the
5174 relocs. */
5175 if (h->dynindx != -1)
5176 goto keep;
5177 }
5178
5179 eh->dyn_relocs = NULL;
5180
5181 keep: ;
5182 }
5183
5184 /* Finally, allocate space. */
5185 for (p = eh->dyn_relocs; p != NULL; p = p->next)
5186 {
5187 asection *sreloc = elf_section_data (p->sec)->sreloc;
5188 sreloc->size += p->count * sizeof (Elf32_External_Rela);
5189 }
5190
5191 return TRUE;
5192 }
5193
5194 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
5195 read-only sections. */
5196
5197 static bfd_boolean
5198 maybe_set_textrel (struct elf_link_hash_entry *h, void *info)
5199 {
5200 if (h->root.type == bfd_link_hash_indirect)
5201 return TRUE;
5202
5203 if (h->root.type == bfd_link_hash_warning)
5204 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5205
5206 if (readonly_dynrelocs (h))
5207 {
5208 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
5209
5210 /* Not an error, just cut short the traversal. */
5211 return FALSE;
5212 }
5213 return TRUE;
5214 }
5215
5216 /* Set the sizes of the dynamic sections. */
5217
5218 static bfd_boolean
5219 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
5220 struct bfd_link_info *info)
5221 {
5222 struct ppc_elf_link_hash_table *htab;
5223 asection *s;
5224 bfd_boolean relocs;
5225 bfd *ibfd;
5226
5227 #ifdef DEBUG
5228 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
5229 #endif
5230
5231 htab = ppc_elf_hash_table (info);
5232 BFD_ASSERT (htab->elf.dynobj != NULL);
5233
5234 if (elf_hash_table (info)->dynamic_sections_created)
5235 {
5236 /* Set the contents of the .interp section to the interpreter. */
5237 if (info->executable)
5238 {
5239 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
5240 BFD_ASSERT (s != NULL);
5241 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5242 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5243 }
5244 }
5245
5246 if (htab->plt_type == PLT_OLD)
5247 htab->got_header_size = 16;
5248 else if (htab->plt_type == PLT_NEW)
5249 htab->got_header_size = 12;
5250
5251 /* Set up .got offsets for local syms, and space for local dynamic
5252 relocs. */
5253 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
5254 {
5255 bfd_signed_vma *local_got;
5256 bfd_signed_vma *end_local_got;
5257 char *lgot_masks;
5258 bfd_size_type locsymcount;
5259 Elf_Internal_Shdr *symtab_hdr;
5260
5261 if (!is_ppc_elf (ibfd))
5262 continue;
5263
5264 for (s = ibfd->sections; s != NULL; s = s->next)
5265 {
5266 struct ppc_elf_dyn_relocs *p;
5267
5268 for (p = ((struct ppc_elf_dyn_relocs *)
5269 elf_section_data (s)->local_dynrel);
5270 p != NULL;
5271 p = p->next)
5272 {
5273 if (!bfd_is_abs_section (p->sec)
5274 && bfd_is_abs_section (p->sec->output_section))
5275 {
5276 /* Input section has been discarded, either because
5277 it is a copy of a linkonce section or due to
5278 linker script /DISCARD/, so we'll be discarding
5279 the relocs too. */
5280 }
5281 else if (htab->is_vxworks
5282 && strcmp (p->sec->output_section->name,
5283 ".tls_vars") == 0)
5284 {
5285 /* Relocations in vxworks .tls_vars sections are
5286 handled specially by the loader. */
5287 }
5288 else if (p->count != 0)
5289 {
5290 elf_section_data (p->sec)->sreloc->size
5291 += p->count * sizeof (Elf32_External_Rela);
5292 if ((p->sec->output_section->flags
5293 & (SEC_READONLY | SEC_ALLOC))
5294 == (SEC_READONLY | SEC_ALLOC))
5295 info->flags |= DF_TEXTREL;
5296 }
5297 }
5298 }
5299
5300 local_got = elf_local_got_refcounts (ibfd);
5301 if (!local_got)
5302 continue;
5303
5304 symtab_hdr = &elf_symtab_hdr (ibfd);
5305 locsymcount = symtab_hdr->sh_info;
5306 end_local_got = local_got + locsymcount;
5307 lgot_masks = (char *) end_local_got;
5308 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
5309 if (*local_got > 0)
5310 {
5311 unsigned int need = 0;
5312 if ((*lgot_masks & TLS_TLS) != 0)
5313 {
5314 if ((*lgot_masks & TLS_GD) != 0)
5315 need += 8;
5316 if ((*lgot_masks & TLS_LD) != 0)
5317 htab->tlsld_got.refcount += 1;
5318 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
5319 need += 4;
5320 if ((*lgot_masks & TLS_DTPREL) != 0)
5321 need += 4;
5322 }
5323 else
5324 need += 4;
5325 if (need == 0)
5326 *local_got = (bfd_vma) -1;
5327 else
5328 {
5329 *local_got = allocate_got (htab, need);
5330 if (info->shared)
5331 htab->relgot->size += (need
5332 * (sizeof (Elf32_External_Rela) / 4));
5333 }
5334 }
5335 else
5336 *local_got = (bfd_vma) -1;
5337 }
5338
5339 /* Allocate space for global sym dynamic relocs. */
5340 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
5341
5342 if (htab->tlsld_got.refcount > 0)
5343 {
5344 htab->tlsld_got.offset = allocate_got (htab, 8);
5345 if (info->shared)
5346 htab->relgot->size += sizeof (Elf32_External_Rela);
5347 }
5348 else
5349 htab->tlsld_got.offset = (bfd_vma) -1;
5350
5351 if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
5352 {
5353 unsigned int g_o_t = 32768;
5354
5355 /* If we haven't allocated the header, do so now. When we get here,
5356 for old plt/got the got size will be 0 to 32764 (not allocated),
5357 or 32780 to 65536 (header allocated). For new plt/got, the
5358 corresponding ranges are 0 to 32768 and 32780 to 65536. */
5359 if (htab->got->size <= 32768)
5360 {
5361 g_o_t = htab->got->size;
5362 if (htab->plt_type == PLT_OLD)
5363 g_o_t += 4;
5364 htab->got->size += htab->got_header_size;
5365 }
5366
5367 htab->elf.hgot->root.u.def.value = g_o_t;
5368 }
5369
5370 if (htab->glink != NULL && htab->glink->size != 0)
5371 {
5372 htab->glink_pltresolve = htab->glink->size;
5373 /* Space for the branch table. */
5374 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
5375 /* Pad out to align the start of PLTresolve. */
5376 htab->glink->size += -htab->glink->size & 15;
5377 htab->glink->size += GLINK_PLTRESOLVE;
5378
5379 if (htab->emit_stub_syms)
5380 {
5381 struct elf_link_hash_entry *sh;
5382 sh = elf_link_hash_lookup (&htab->elf, "__glink",
5383 TRUE, FALSE, FALSE);
5384 if (sh == NULL)
5385 return FALSE;
5386 if (sh->root.type == bfd_link_hash_new)
5387 {
5388 sh->root.type = bfd_link_hash_defined;
5389 sh->root.u.def.section = htab->glink;
5390 sh->root.u.def.value = htab->glink_pltresolve;
5391 sh->ref_regular = 1;
5392 sh->def_regular = 1;
5393 sh->ref_regular_nonweak = 1;
5394 sh->forced_local = 1;
5395 sh->non_elf = 0;
5396 }
5397 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
5398 TRUE, FALSE, FALSE);
5399 if (sh == NULL)
5400 return FALSE;
5401 if (sh->root.type == bfd_link_hash_new)
5402 {
5403 sh->root.type = bfd_link_hash_defined;
5404 sh->root.u.def.section = htab->glink;
5405 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
5406 sh->ref_regular = 1;
5407 sh->def_regular = 1;
5408 sh->ref_regular_nonweak = 1;
5409 sh->forced_local = 1;
5410 sh->non_elf = 0;
5411 }
5412 }
5413 }
5414
5415 /* We've now determined the sizes of the various dynamic sections.
5416 Allocate memory for them. */
5417 relocs = FALSE;
5418 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
5419 {
5420 bfd_boolean strip_section = TRUE;
5421
5422 if ((s->flags & SEC_LINKER_CREATED) == 0)
5423 continue;
5424
5425 if (s == htab->plt
5426 || s == htab->glink
5427 || s == htab->got
5428 || s == htab->sgotplt
5429 || s == htab->sbss
5430 || s == htab->dynbss
5431 || s == htab->dynsbss)
5432 {
5433 /* We'd like to strip these sections if they aren't needed, but if
5434 we've exported dynamic symbols from them we must leave them.
5435 It's too late to tell BFD to get rid of the symbols. */
5436 if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
5437 strip_section = FALSE;
5438 /* Strip this section if we don't need it; see the
5439 comment below. */
5440 }
5441 else if (s == htab->sdata[0].section
5442 || s == htab->sdata[1].section)
5443 {
5444 /* Strip these too. */
5445 }
5446 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
5447 {
5448 if (s->size != 0)
5449 {
5450 /* Remember whether there are any relocation sections. */
5451 relocs = TRUE;
5452
5453 /* We use the reloc_count field as a counter if we need
5454 to copy relocs into the output file. */
5455 s->reloc_count = 0;
5456 }
5457 }
5458 else
5459 {
5460 /* It's not one of our sections, so don't allocate space. */
5461 continue;
5462 }
5463
5464 if (s->size == 0 && strip_section)
5465 {
5466 /* If we don't need this section, strip it from the
5467 output file. This is mostly to handle .rela.bss and
5468 .rela.plt. We must create both sections in
5469 create_dynamic_sections, because they must be created
5470 before the linker maps input sections to output
5471 sections. The linker does that before
5472 adjust_dynamic_symbol is called, and it is that
5473 function which decides whether anything needs to go
5474 into these sections. */
5475 s->flags |= SEC_EXCLUDE;
5476 continue;
5477 }
5478
5479 if ((s->flags & SEC_HAS_CONTENTS) == 0)
5480 continue;
5481
5482 /* Allocate memory for the section contents. */
5483 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
5484 if (s->contents == NULL)
5485 return FALSE;
5486 }
5487
5488 if (htab->elf.dynamic_sections_created)
5489 {
5490 /* Add some entries to the .dynamic section. We fill in the
5491 values later, in ppc_elf_finish_dynamic_sections, but we
5492 must add the entries now so that we get the correct size for
5493 the .dynamic section. The DT_DEBUG entry is filled in by the
5494 dynamic linker and used by the debugger. */
5495 #define add_dynamic_entry(TAG, VAL) \
5496 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5497
5498 if (info->executable)
5499 {
5500 if (!add_dynamic_entry (DT_DEBUG, 0))
5501 return FALSE;
5502 }
5503
5504 if (htab->plt != NULL && htab->plt->size != 0)
5505 {
5506 if (!add_dynamic_entry (DT_PLTGOT, 0)
5507 || !add_dynamic_entry (DT_PLTRELSZ, 0)
5508 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
5509 || !add_dynamic_entry (DT_JMPREL, 0))
5510 return FALSE;
5511 }
5512
5513 if (htab->glink != NULL && htab->glink->size != 0)
5514 {
5515 if (!add_dynamic_entry (DT_PPC_GOT, 0))
5516 return FALSE;
5517 }
5518
5519 if (relocs)
5520 {
5521 if (!add_dynamic_entry (DT_RELA, 0)
5522 || !add_dynamic_entry (DT_RELASZ, 0)
5523 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
5524 return FALSE;
5525 }
5526
5527 /* If any dynamic relocs apply to a read-only section, then we
5528 need a DT_TEXTREL entry. */
5529 if ((info->flags & DF_TEXTREL) == 0)
5530 elf_link_hash_traverse (elf_hash_table (info), maybe_set_textrel,
5531 info);
5532
5533 if ((info->flags & DF_TEXTREL) != 0)
5534 {
5535 if (!add_dynamic_entry (DT_TEXTREL, 0))
5536 return FALSE;
5537 }
5538 if (htab->is_vxworks
5539 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
5540 return FALSE;
5541 }
5542 #undef add_dynamic_entry
5543
5544 return TRUE;
5545 }
5546
5547 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5548
5549 static bfd_boolean
5550 ppc_elf_hash_symbol (struct elf_link_hash_entry *h)
5551 {
5552 if (h->plt.plist != NULL
5553 && !h->def_regular
5554 && (!h->pointer_equality_needed
5555 || !h->ref_regular_nonweak))
5556 return FALSE;
5557
5558 return _bfd_elf_hash_symbol (h);
5559 }
5560 \f
5561 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
5562
5563 static const int shared_stub_entry[] =
5564 {
5565 0x7c0802a6, /* mflr 0 */
5566 0x429f0005, /* bcl 20, 31, .Lxxx */
5567 0x7d6802a6, /* mflr 11 */
5568 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
5569 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
5570 0x7c0803a6, /* mtlr 0 */
5571 0x7d6903a6, /* mtctr 11 */
5572 0x4e800420, /* bctr */
5573 };
5574
5575 static const int stub_entry[] =
5576 {
5577 0x3d600000, /* lis 11,xxx@ha */
5578 0x396b0000, /* addi 11,11,xxx@l */
5579 0x7d6903a6, /* mtctr 11 */
5580 0x4e800420, /* bctr */
5581 };
5582
5583 static bfd_boolean
5584 ppc_elf_relax_section (bfd *abfd,
5585 asection *isec,
5586 struct bfd_link_info *link_info,
5587 bfd_boolean *again)
5588 {
5589 struct one_fixup
5590 {
5591 struct one_fixup *next;
5592 asection *tsec;
5593 bfd_vma toff;
5594 bfd_vma trampoff;
5595 };
5596
5597 Elf_Internal_Shdr *symtab_hdr;
5598 bfd_byte *contents = NULL;
5599 Elf_Internal_Sym *isymbuf = NULL;
5600 Elf_Internal_Rela *internal_relocs = NULL;
5601 Elf_Internal_Rela *irel, *irelend;
5602 struct one_fixup *fixups = NULL;
5603 bfd_boolean changed;
5604 struct ppc_elf_link_hash_table *htab;
5605 bfd_size_type trampoff;
5606 asection *got2;
5607
5608 *again = FALSE;
5609
5610 /* Nothing to do if there are no relocations, and no need to do
5611 anything with non-alloc sections. */
5612 if ((isec->flags & SEC_ALLOC) == 0
5613 || (isec->flags & SEC_RELOC) == 0
5614 || isec->reloc_count == 0)
5615 return TRUE;
5616
5617 trampoff = (isec->size + 3) & (bfd_vma) -4;
5618 /* Space for a branch around any trampolines. */
5619 trampoff += 4;
5620
5621 symtab_hdr = &elf_symtab_hdr (abfd);
5622
5623 /* Get a copy of the native relocations. */
5624 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5625 link_info->keep_memory);
5626 if (internal_relocs == NULL)
5627 goto error_return;
5628
5629 htab = ppc_elf_hash_table (link_info);
5630 got2 = bfd_get_section_by_name (abfd, ".got2");
5631
5632 irelend = internal_relocs + isec->reloc_count;
5633 for (irel = internal_relocs; irel < irelend; irel++)
5634 {
5635 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5636 bfd_vma symaddr, reladdr, toff, roff;
5637 asection *tsec;
5638 struct one_fixup *f;
5639 size_t insn_offset = 0;
5640 bfd_vma max_branch_offset, val;
5641 bfd_byte *hit_addr;
5642 unsigned long t0;
5643 unsigned char sym_type;
5644
5645 switch (r_type)
5646 {
5647 case R_PPC_REL24:
5648 case R_PPC_LOCAL24PC:
5649 case R_PPC_PLTREL24:
5650 max_branch_offset = 1 << 25;
5651 break;
5652
5653 case R_PPC_REL14:
5654 case R_PPC_REL14_BRTAKEN:
5655 case R_PPC_REL14_BRNTAKEN:
5656 max_branch_offset = 1 << 15;
5657 break;
5658
5659 default:
5660 continue;
5661 }
5662
5663 /* Get the value of the symbol referred to by the reloc. */
5664 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5665 {
5666 /* A local symbol. */
5667 Elf_Internal_Sym *isym;
5668
5669 /* Read this BFD's local symbols. */
5670 if (isymbuf == NULL)
5671 {
5672 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5673 if (isymbuf == NULL)
5674 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5675 symtab_hdr->sh_info, 0,
5676 NULL, NULL, NULL);
5677 if (isymbuf == 0)
5678 goto error_return;
5679 }
5680 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5681 if (isym->st_shndx == SHN_UNDEF)
5682 continue; /* We can't do anything with undefined symbols. */
5683 else if (isym->st_shndx == SHN_ABS)
5684 tsec = bfd_abs_section_ptr;
5685 else if (isym->st_shndx == SHN_COMMON)
5686 tsec = bfd_com_section_ptr;
5687 else
5688 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5689
5690 toff = isym->st_value;
5691 sym_type = ELF_ST_TYPE (isym->st_info);
5692 }
5693 else
5694 {
5695 /* Global symbol handling. */
5696 unsigned long indx;
5697 struct elf_link_hash_entry *h;
5698
5699 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5700 h = elf_sym_hashes (abfd)[indx];
5701
5702 while (h->root.type == bfd_link_hash_indirect
5703 || h->root.type == bfd_link_hash_warning)
5704 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5705
5706 tsec = NULL;
5707 toff = 0;
5708 if (r_type == R_PPC_PLTREL24
5709 && htab->plt != NULL)
5710 {
5711 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5712
5713 if (ent != NULL)
5714 {
5715 if (htab->plt_type == PLT_NEW)
5716 {
5717 tsec = htab->glink;
5718 toff = ent->glink_offset;
5719 }
5720 else
5721 {
5722 tsec = htab->plt;
5723 toff = ent->plt.offset;
5724 }
5725 }
5726 }
5727 if (tsec != NULL)
5728 ;
5729 else if (h->root.type == bfd_link_hash_defined
5730 || h->root.type == bfd_link_hash_defweak)
5731 {
5732 tsec = h->root.u.def.section;
5733 toff = h->root.u.def.value;
5734 }
5735 else
5736 continue;
5737
5738 sym_type = h->type;
5739 }
5740
5741 /* If the branch and target are in the same section, you have
5742 no hope of adding stubs. We'll error out later should the
5743 branch overflow. */
5744 if (tsec == isec)
5745 continue;
5746
5747 /* There probably isn't any reason to handle symbols in
5748 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5749 attribute for a code section, and we are only looking at
5750 branches. However, implement it correctly here as a
5751 reference for other target relax_section functions. */
5752 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5753 {
5754 /* At this stage in linking, no SEC_MERGE symbol has been
5755 adjusted, so all references to such symbols need to be
5756 passed through _bfd_merged_section_offset. (Later, in
5757 relocate_section, all SEC_MERGE symbols *except* for
5758 section symbols have been adjusted.)
5759
5760 gas may reduce relocations against symbols in SEC_MERGE
5761 sections to a relocation against the section symbol when
5762 the original addend was zero. When the reloc is against
5763 a section symbol we should include the addend in the
5764 offset passed to _bfd_merged_section_offset, since the
5765 location of interest is the original symbol. On the
5766 other hand, an access to "sym+addend" where "sym" is not
5767 a section symbol should not include the addend; Such an
5768 access is presumed to be an offset from "sym"; The
5769 location of interest is just "sym". */
5770 if (sym_type == STT_SECTION)
5771 toff += irel->r_addend;
5772
5773 toff = _bfd_merged_section_offset (abfd, &tsec,
5774 elf_section_data (tsec)->sec_info,
5775 toff);
5776
5777 if (sym_type != STT_SECTION)
5778 toff += irel->r_addend;
5779 }
5780 /* PLTREL24 addends are special. */
5781 else if (r_type != R_PPC_PLTREL24)
5782 toff += irel->r_addend;
5783
5784 /* Attempted -shared link of non-pic code loses. */
5785 if (tsec->output_section == NULL)
5786 continue;
5787
5788 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5789
5790 roff = irel->r_offset;
5791 reladdr = isec->output_section->vma + isec->output_offset + roff;
5792
5793 /* If the branch is in range, no need to do anything. */
5794 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5795 continue;
5796
5797 /* Look for an existing fixup to this address. */
5798 for (f = fixups; f ; f = f->next)
5799 if (f->tsec == tsec && f->toff == toff)
5800 break;
5801
5802 if (f == NULL)
5803 {
5804 size_t size;
5805 unsigned long stub_rtype;
5806
5807 val = trampoff - roff;
5808 if (val >= max_branch_offset)
5809 /* Oh dear, we can't reach a trampoline. Don't try to add
5810 one. We'll report an error later. */
5811 continue;
5812
5813 if (link_info->shared)
5814 {
5815 size = 4 * ARRAY_SIZE (shared_stub_entry);
5816 insn_offset = 12;
5817 stub_rtype = R_PPC_RELAX32PC;
5818 }
5819 else
5820 {
5821 size = 4 * ARRAY_SIZE (stub_entry);
5822 insn_offset = 0;
5823 stub_rtype = R_PPC_RELAX32;
5824 }
5825
5826 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5827 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5828 abort ();
5829 if (tsec == htab->plt
5830 || tsec == htab->glink)
5831 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5832
5833 /* Hijack the old relocation. Since we need two
5834 relocations for this use a "composite" reloc. */
5835 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5836 stub_rtype);
5837 irel->r_offset = trampoff + insn_offset;
5838 if (r_type == R_PPC_PLTREL24)
5839 irel->r_addend = 0;
5840
5841 /* Record the fixup so we don't do it again this section. */
5842 f = bfd_malloc (sizeof (*f));
5843 f->next = fixups;
5844 f->tsec = tsec;
5845 f->toff = toff;
5846 f->trampoff = trampoff;
5847 fixups = f;
5848
5849 trampoff += size;
5850 }
5851 else
5852 {
5853 val = f->trampoff - roff;
5854 if (val >= max_branch_offset)
5855 continue;
5856
5857 /* Nop out the reloc, since we're finalizing things here. */
5858 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5859 }
5860
5861 /* Get the section contents. */
5862 if (contents == NULL)
5863 {
5864 /* Get cached copy if it exists. */
5865 if (elf_section_data (isec)->this_hdr.contents != NULL)
5866 contents = elf_section_data (isec)->this_hdr.contents;
5867 else
5868 {
5869 /* Go get them off disk. */
5870 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5871 goto error_return;
5872 }
5873 }
5874
5875 /* Fix up the existing branch to hit the trampoline. */
5876 hit_addr = contents + roff;
5877 switch (r_type)
5878 {
5879 case R_PPC_REL24:
5880 case R_PPC_LOCAL24PC:
5881 case R_PPC_PLTREL24:
5882 t0 = bfd_get_32 (abfd, hit_addr);
5883 t0 &= ~0x3fffffc;
5884 t0 |= val & 0x3fffffc;
5885 bfd_put_32 (abfd, t0, hit_addr);
5886 break;
5887
5888 case R_PPC_REL14:
5889 case R_PPC_REL14_BRTAKEN:
5890 case R_PPC_REL14_BRNTAKEN:
5891 t0 = bfd_get_32 (abfd, hit_addr);
5892 t0 &= ~0xfffc;
5893 t0 |= val & 0xfffc;
5894 bfd_put_32 (abfd, t0, hit_addr);
5895 break;
5896 }
5897 }
5898
5899 /* Write out the trampolines. */
5900 changed = fixups != NULL;
5901 if (fixups != NULL)
5902 {
5903 const int *stub;
5904 bfd_byte *dest;
5905 bfd_vma val;
5906 int i, size;
5907
5908 do
5909 {
5910 struct one_fixup *f = fixups;
5911 fixups = fixups->next;
5912 free (f);
5913 }
5914 while (fixups);
5915
5916 contents = bfd_realloc_or_free (contents, trampoff);
5917 if (contents == NULL)
5918 goto error_return;
5919
5920 isec->size = (isec->size + 3) & (bfd_vma) -4;
5921 /* Branch around the trampolines. */
5922 val = B + trampoff - isec->size;
5923 dest = contents + isec->size;
5924 isec->size = trampoff;
5925 bfd_put_32 (abfd, val, dest);
5926 dest += 4;
5927
5928 if (link_info->shared)
5929 {
5930 stub = shared_stub_entry;
5931 size = ARRAY_SIZE (shared_stub_entry);
5932 }
5933 else
5934 {
5935 stub = stub_entry;
5936 size = ARRAY_SIZE (stub_entry);
5937 }
5938
5939 i = 0;
5940 while (dest < contents + trampoff)
5941 {
5942 bfd_put_32 (abfd, stub[i], dest);
5943 i++;
5944 if (i == size)
5945 i = 0;
5946 dest += 4;
5947 }
5948 BFD_ASSERT (i == 0);
5949 }
5950
5951 if (isymbuf != NULL
5952 && symtab_hdr->contents != (unsigned char *) isymbuf)
5953 {
5954 if (! link_info->keep_memory)
5955 free (isymbuf);
5956 else
5957 {
5958 /* Cache the symbols for elf_link_input_bfd. */
5959 symtab_hdr->contents = (unsigned char *) isymbuf;
5960 }
5961 }
5962
5963 if (contents != NULL
5964 && elf_section_data (isec)->this_hdr.contents != contents)
5965 {
5966 if (!changed && !link_info->keep_memory)
5967 free (contents);
5968 else
5969 {
5970 /* Cache the section contents for elf_link_input_bfd. */
5971 elf_section_data (isec)->this_hdr.contents = contents;
5972 }
5973 }
5974
5975 if (elf_section_data (isec)->relocs != internal_relocs)
5976 {
5977 if (!changed)
5978 free (internal_relocs);
5979 else
5980 elf_section_data (isec)->relocs = internal_relocs;
5981 }
5982
5983 *again = changed;
5984 return TRUE;
5985
5986 error_return:
5987 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5988 free (isymbuf);
5989 if (contents != NULL
5990 && elf_section_data (isec)->this_hdr.contents != contents)
5991 free (contents);
5992 if (internal_relocs != NULL
5993 && elf_section_data (isec)->relocs != internal_relocs)
5994 free (internal_relocs);
5995 return FALSE;
5996 }
5997 \f
5998 /* What to do when ld finds relocations against symbols defined in
5999 discarded sections. */
6000
6001 static unsigned int
6002 ppc_elf_action_discarded (asection *sec)
6003 {
6004 if (strcmp (".fixup", sec->name) == 0)
6005 return 0;
6006
6007 if (strcmp (".got2", sec->name) == 0)
6008 return 0;
6009
6010 return _bfd_elf_default_action_discarded (sec);
6011 }
6012 \f
6013 /* Fill in the address for a pointer generated in a linker section. */
6014
6015 static bfd_vma
6016 elf_finish_pointer_linker_section (bfd *input_bfd,
6017 elf_linker_section_t *lsect,
6018 struct elf_link_hash_entry *h,
6019 bfd_vma relocation,
6020 const Elf_Internal_Rela *rel)
6021 {
6022 elf_linker_section_pointers_t *linker_section_ptr;
6023
6024 BFD_ASSERT (lsect != NULL);
6025
6026 if (h != NULL)
6027 {
6028 /* Handle global symbol. */
6029 struct ppc_elf_link_hash_entry *eh;
6030
6031 eh = (struct ppc_elf_link_hash_entry *) h;
6032 BFD_ASSERT (eh->elf.def_regular);
6033 linker_section_ptr = eh->linker_section_pointer;
6034 }
6035 else
6036 {
6037 /* Handle local symbol. */
6038 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
6039
6040 BFD_ASSERT (is_ppc_elf (input_bfd));
6041 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
6042 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
6043 }
6044
6045 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
6046 rel->r_addend,
6047 lsect);
6048 BFD_ASSERT (linker_section_ptr != NULL);
6049
6050 /* Offset will always be a multiple of four, so use the bottom bit
6051 as a "written" flag. */
6052 if ((linker_section_ptr->offset & 1) == 0)
6053 {
6054 bfd_put_32 (lsect->section->owner,
6055 relocation + linker_section_ptr->addend,
6056 lsect->section->contents + linker_section_ptr->offset);
6057 linker_section_ptr->offset += 1;
6058 }
6059
6060 relocation = (lsect->section->output_offset
6061 + linker_section_ptr->offset - 1
6062 - 0x8000);
6063
6064 #ifdef DEBUG
6065 fprintf (stderr,
6066 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
6067 lsect->name, (long) relocation, (long) relocation);
6068 #endif
6069
6070 /* Subtract out the addend, because it will get added back in by the normal
6071 processing. */
6072 return relocation - linker_section_ptr->addend;
6073 }
6074
6075 /* The RELOCATE_SECTION function is called by the ELF backend linker
6076 to handle the relocations for a section.
6077
6078 The relocs are always passed as Rela structures; if the section
6079 actually uses Rel structures, the r_addend field will always be
6080 zero.
6081
6082 This function is responsible for adjust the section contents as
6083 necessary, and (if using Rela relocs and generating a
6084 relocatable output file) adjusting the reloc addend as
6085 necessary.
6086
6087 This function does not have to worry about setting the reloc
6088 address or the reloc symbol index.
6089
6090 LOCAL_SYMS is a pointer to the swapped in local symbols.
6091
6092 LOCAL_SECTIONS is an array giving the section in the input file
6093 corresponding to the st_shndx field of each local symbol.
6094
6095 The global hash table entry for the global symbols can be found
6096 via elf_sym_hashes (input_bfd).
6097
6098 When generating relocatable output, this function must handle
6099 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
6100 going to be the section symbol corresponding to the output
6101 section, which means that the addend must be adjusted
6102 accordingly. */
6103
6104 static bfd_boolean
6105 ppc_elf_relocate_section (bfd *output_bfd,
6106 struct bfd_link_info *info,
6107 bfd *input_bfd,
6108 asection *input_section,
6109 bfd_byte *contents,
6110 Elf_Internal_Rela *relocs,
6111 Elf_Internal_Sym *local_syms,
6112 asection **local_sections)
6113 {
6114 Elf_Internal_Shdr *symtab_hdr;
6115 struct elf_link_hash_entry **sym_hashes;
6116 struct ppc_elf_link_hash_table *htab;
6117 Elf_Internal_Rela *rel;
6118 Elf_Internal_Rela *relend;
6119 Elf_Internal_Rela outrel;
6120 bfd_byte *loc;
6121 asection *got2, *sreloc = NULL;
6122 bfd_vma *local_got_offsets;
6123 bfd_boolean ret = TRUE;
6124 bfd_vma d_offset = (bfd_big_endian (output_bfd) ? 2 : 0);
6125 bfd_boolean is_vxworks_tls;
6126
6127 #ifdef DEBUG
6128 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
6129 "%ld relocations%s",
6130 input_bfd, input_section,
6131 (long) input_section->reloc_count,
6132 (info->relocatable) ? " (relocatable)" : "");
6133 #endif
6134
6135 got2 = bfd_get_section_by_name (input_bfd, ".got2");
6136
6137 /* Initialize howto table if not already done. */
6138 if (!ppc_elf_howto_table[R_PPC_ADDR32])
6139 ppc_elf_howto_init ();
6140
6141 htab = ppc_elf_hash_table (info);
6142 local_got_offsets = elf_local_got_offsets (input_bfd);
6143 symtab_hdr = &elf_symtab_hdr (input_bfd);
6144 sym_hashes = elf_sym_hashes (input_bfd);
6145 /* We have to handle relocations in vxworks .tls_vars sections
6146 specially, because the dynamic loader is 'weird'. */
6147 is_vxworks_tls = (htab->is_vxworks && info->shared
6148 && !strcmp (input_section->output_section->name,
6149 ".tls_vars"));
6150 rel = relocs;
6151 relend = relocs + input_section->reloc_count;
6152 for (; rel < relend; rel++)
6153 {
6154 enum elf_ppc_reloc_type r_type;
6155 bfd_vma addend;
6156 bfd_reloc_status_type r;
6157 Elf_Internal_Sym *sym;
6158 asection *sec;
6159 struct elf_link_hash_entry *h;
6160 const char *sym_name;
6161 reloc_howto_type *howto;
6162 unsigned long r_symndx;
6163 bfd_vma relocation;
6164 bfd_vma branch_bit, insn, from;
6165 bfd_boolean unresolved_reloc;
6166 bfd_boolean warned;
6167 unsigned int tls_type, tls_mask, tls_gd;
6168
6169 r_type = ELF32_R_TYPE (rel->r_info);
6170 sym = NULL;
6171 sec = NULL;
6172 h = NULL;
6173 unresolved_reloc = FALSE;
6174 warned = FALSE;
6175 r_symndx = ELF32_R_SYM (rel->r_info);
6176
6177 if (r_symndx < symtab_hdr->sh_info)
6178 {
6179 sym = local_syms + r_symndx;
6180 sec = local_sections[r_symndx];
6181 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
6182
6183 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
6184 }
6185 else
6186 {
6187 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
6188 r_symndx, symtab_hdr, sym_hashes,
6189 h, sec, relocation,
6190 unresolved_reloc, warned);
6191
6192 sym_name = h->root.root.string;
6193 }
6194
6195 if (sec != NULL && elf_discarded_section (sec))
6196 {
6197 /* For relocs against symbols from removed linkonce sections,
6198 or sections discarded by a linker script, we just want the
6199 section contents zeroed. Avoid any special processing. */
6200 howto = NULL;
6201 if (r_type < R_PPC_max)
6202 howto = ppc_elf_howto_table[r_type];
6203 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
6204 rel->r_info = 0;
6205 rel->r_addend = 0;
6206 continue;
6207 }
6208
6209 if (info->relocatable)
6210 {
6211 if (got2 != NULL
6212 && r_type == R_PPC_PLTREL24
6213 && rel->r_addend >= 32768)
6214 {
6215 /* R_PPC_PLTREL24 is rather special. If non-zero, the
6216 addend specifies the GOT pointer offset within .got2. */
6217 rel->r_addend += got2->output_offset;
6218 }
6219 continue;
6220 }
6221
6222 /* TLS optimizations. Replace instruction sequences and relocs
6223 based on information we collected in tls_optimize. We edit
6224 RELOCS so that --emit-relocs will output something sensible
6225 for the final instruction stream. */
6226 tls_mask = 0;
6227 tls_gd = 0;
6228 if (IS_PPC_TLS_RELOC (r_type))
6229 {
6230 if (h != NULL)
6231 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
6232 else if (local_got_offsets != NULL)
6233 {
6234 char *lgot_masks;
6235 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
6236 tls_mask = lgot_masks[r_symndx];
6237 }
6238 }
6239
6240 /* Ensure reloc mapping code below stays sane. */
6241 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
6242 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
6243 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
6244 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
6245 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
6246 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
6247 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
6248 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
6249 abort ();
6250 switch (r_type)
6251 {
6252 default:
6253 break;
6254
6255 case R_PPC_GOT_TPREL16:
6256 case R_PPC_GOT_TPREL16_LO:
6257 if (tls_mask != 0
6258 && (tls_mask & TLS_TPREL) == 0)
6259 {
6260 bfd_vma insn;
6261 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
6262 insn &= 31 << 21;
6263 insn |= 0x3c020000; /* addis 0,2,0 */
6264 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - d_offset);
6265 r_type = R_PPC_TPREL16_HA;
6266 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6267 }
6268 break;
6269
6270 case R_PPC_TLS:
6271 if (tls_mask != 0
6272 && (tls_mask & TLS_TPREL) == 0)
6273 {
6274 bfd_vma insn, rtra;
6275 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6276 if ((insn & ((31 << 26) | (31 << 11)))
6277 == ((31 << 26) | (2 << 11)))
6278 rtra = insn & ((1 << 26) - (1 << 16));
6279 else if ((insn & ((31 << 26) | (31 << 16)))
6280 == ((31 << 26) | (2 << 16)))
6281 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
6282 else
6283 abort ();
6284 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
6285 /* add -> addi. */
6286 insn = 14 << 26;
6287 else if ((insn & (31 << 1)) == 23 << 1
6288 && ((insn & (31 << 6)) < 14 << 6
6289 || ((insn & (31 << 6)) >= 16 << 6
6290 && (insn & (31 << 6)) < 24 << 6)))
6291 /* load and store indexed -> dform. */
6292 insn = (32 | ((insn >> 6) & 31)) << 26;
6293 else if ((insn & (31 << 1)) == 21 << 1
6294 && (insn & (0x1a << 6)) == 0)
6295 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
6296 insn = (((58 | ((insn >> 6) & 4)) << 26)
6297 | ((insn >> 6) & 1));
6298 else if ((insn & (31 << 1)) == 21 << 1
6299 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
6300 /* lwax -> lwa. */
6301 insn = (58 << 26) | 2;
6302 else
6303 abort ();
6304 insn |= rtra;
6305 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6306 r_type = R_PPC_TPREL16_LO;
6307 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6308
6309 /* Was PPC_TLS which sits on insn boundary, now
6310 PPC_TPREL16_LO which is at low-order half-word. */
6311 rel->r_offset += d_offset;
6312 }
6313 break;
6314
6315 case R_PPC_GOT_TLSGD16_HI:
6316 case R_PPC_GOT_TLSGD16_HA:
6317 tls_gd = TLS_TPRELGD;
6318 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6319 goto tls_gdld_hi;
6320 break;
6321
6322 case R_PPC_GOT_TLSLD16_HI:
6323 case R_PPC_GOT_TLSLD16_HA:
6324 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6325 {
6326 tls_gdld_hi:
6327 if ((tls_mask & tls_gd) != 0)
6328 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6329 + R_PPC_GOT_TPREL16);
6330 else
6331 {
6332 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
6333 rel->r_offset -= d_offset;
6334 r_type = R_PPC_NONE;
6335 }
6336 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6337 }
6338 break;
6339
6340 case R_PPC_GOT_TLSGD16:
6341 case R_PPC_GOT_TLSGD16_LO:
6342 tls_gd = TLS_TPRELGD;
6343 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
6344 goto tls_ldgd_opt;
6345 break;
6346
6347 case R_PPC_GOT_TLSLD16:
6348 case R_PPC_GOT_TLSLD16_LO:
6349 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
6350 {
6351 bfd_vma insn1, insn2;
6352 bfd_vma offset;
6353
6354 tls_ldgd_opt:
6355 offset = rel[1].r_offset;
6356 insn1 = bfd_get_32 (output_bfd,
6357 contents + rel->r_offset - d_offset);
6358 if ((tls_mask & tls_gd) != 0)
6359 {
6360 /* IE */
6361 insn1 &= (1 << 26) - 1;
6362 insn1 |= 32 << 26; /* lwz */
6363 insn2 = 0x7c631214; /* add 3,3,2 */
6364 rel[1].r_info
6365 = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info), R_PPC_NONE);
6366 rel[1].r_addend = 0;
6367 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
6368 + R_PPC_GOT_TPREL16);
6369 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6370 }
6371 else
6372 {
6373 /* LE */
6374 insn1 = 0x3c620000; /* addis 3,2,0 */
6375 insn2 = 0x38630000; /* addi 3,3,0 */
6376 if (tls_gd == 0)
6377 {
6378 /* Was an LD reloc. */
6379 for (r_symndx = 0;
6380 r_symndx < symtab_hdr->sh_info;
6381 r_symndx++)
6382 if (local_sections[r_symndx] == sec)
6383 break;
6384 if (r_symndx >= symtab_hdr->sh_info)
6385 r_symndx = 0;
6386 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
6387 if (r_symndx != 0)
6388 rel->r_addend -= (local_syms[r_symndx].st_value
6389 + sec->output_offset
6390 + sec->output_section->vma);
6391 }
6392 r_type = R_PPC_TPREL16_HA;
6393 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
6394 rel[1].r_info = ELF32_R_INFO (r_symndx,
6395 R_PPC_TPREL16_LO);
6396 rel[1].r_offset += d_offset;
6397 rel[1].r_addend = rel->r_addend;
6398 }
6399 bfd_put_32 (output_bfd, insn1,
6400 contents + rel->r_offset - d_offset);
6401 bfd_put_32 (output_bfd, insn2, contents + offset);
6402 if (tls_gd == 0)
6403 {
6404 /* We changed the symbol on an LD reloc. Start over
6405 in order to get h, sym, sec etc. right. */
6406 rel--;
6407 continue;
6408 }
6409 }
6410 break;
6411 }
6412
6413 /* Handle other relocations that tweak non-addend part of insn. */
6414 branch_bit = 0;
6415 switch (r_type)
6416 {
6417 default:
6418 break;
6419
6420 /* Branch taken prediction relocations. */
6421 case R_PPC_ADDR14_BRTAKEN:
6422 case R_PPC_REL14_BRTAKEN:
6423 branch_bit = BRANCH_PREDICT_BIT;
6424 /* Fall thru */
6425
6426 /* Branch not taken prediction relocations. */
6427 case R_PPC_ADDR14_BRNTAKEN:
6428 case R_PPC_REL14_BRNTAKEN:
6429 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6430 insn &= ~BRANCH_PREDICT_BIT;
6431 insn |= branch_bit;
6432
6433 from = (rel->r_offset
6434 + input_section->output_offset
6435 + input_section->output_section->vma);
6436
6437 /* Invert 'y' bit if not the default. */
6438 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
6439 insn ^= BRANCH_PREDICT_BIT;
6440
6441 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6442 break;
6443 }
6444
6445 addend = rel->r_addend;
6446 tls_type = 0;
6447 howto = NULL;
6448 if (r_type < R_PPC_max)
6449 howto = ppc_elf_howto_table[r_type];
6450 switch (r_type)
6451 {
6452 default:
6453 (*_bfd_error_handler)
6454 (_("%B: unknown relocation type %d for symbol %s"),
6455 input_bfd, (int) r_type, sym_name);
6456
6457 bfd_set_error (bfd_error_bad_value);
6458 ret = FALSE;
6459 continue;
6460
6461 case R_PPC_NONE:
6462 case R_PPC_TLS:
6463 case R_PPC_EMB_MRKREF:
6464 case R_PPC_GNU_VTINHERIT:
6465 case R_PPC_GNU_VTENTRY:
6466 continue;
6467
6468 /* GOT16 relocations. Like an ADDR16 using the symbol's
6469 address in the GOT as relocation value instead of the
6470 symbol's value itself. Also, create a GOT entry for the
6471 symbol and put the symbol value there. */
6472 case R_PPC_GOT_TLSGD16:
6473 case R_PPC_GOT_TLSGD16_LO:
6474 case R_PPC_GOT_TLSGD16_HI:
6475 case R_PPC_GOT_TLSGD16_HA:
6476 tls_type = TLS_TLS | TLS_GD;
6477 goto dogot;
6478
6479 case R_PPC_GOT_TLSLD16:
6480 case R_PPC_GOT_TLSLD16_LO:
6481 case R_PPC_GOT_TLSLD16_HI:
6482 case R_PPC_GOT_TLSLD16_HA:
6483 tls_type = TLS_TLS | TLS_LD;
6484 goto dogot;
6485
6486 case R_PPC_GOT_TPREL16:
6487 case R_PPC_GOT_TPREL16_LO:
6488 case R_PPC_GOT_TPREL16_HI:
6489 case R_PPC_GOT_TPREL16_HA:
6490 tls_type = TLS_TLS | TLS_TPREL;
6491 goto dogot;
6492
6493 case R_PPC_GOT_DTPREL16:
6494 case R_PPC_GOT_DTPREL16_LO:
6495 case R_PPC_GOT_DTPREL16_HI:
6496 case R_PPC_GOT_DTPREL16_HA:
6497 tls_type = TLS_TLS | TLS_DTPREL;
6498 goto dogot;
6499
6500 case R_PPC_GOT16:
6501 case R_PPC_GOT16_LO:
6502 case R_PPC_GOT16_HI:
6503 case R_PPC_GOT16_HA:
6504 dogot:
6505 {
6506 /* Relocation is to the entry for this symbol in the global
6507 offset table. */
6508 bfd_vma off;
6509 bfd_vma *offp;
6510 unsigned long indx;
6511
6512 if (htab->got == NULL)
6513 abort ();
6514
6515 indx = 0;
6516 if (tls_type == (TLS_TLS | TLS_LD)
6517 && (h == NULL
6518 || !h->def_dynamic))
6519 offp = &htab->tlsld_got.offset;
6520 else if (h != NULL)
6521 {
6522 bfd_boolean dyn;
6523 dyn = htab->elf.dynamic_sections_created;
6524 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
6525 || (info->shared
6526 && SYMBOL_REFERENCES_LOCAL (info, h)))
6527 /* This is actually a static link, or it is a
6528 -Bsymbolic link and the symbol is defined
6529 locally, or the symbol was forced to be local
6530 because of a version file. */
6531 ;
6532 else
6533 {
6534 indx = h->dynindx;
6535 unresolved_reloc = FALSE;
6536 }
6537 offp = &h->got.offset;
6538 }
6539 else
6540 {
6541 if (local_got_offsets == NULL)
6542 abort ();
6543 offp = &local_got_offsets[r_symndx];
6544 }
6545
6546 /* The offset must always be a multiple of 4. We use the
6547 least significant bit to record whether we have already
6548 processed this entry. */
6549 off = *offp;
6550 if ((off & 1) != 0)
6551 off &= ~1;
6552 else
6553 {
6554 unsigned int tls_m = (tls_mask
6555 & (TLS_LD | TLS_GD | TLS_DTPREL
6556 | TLS_TPREL | TLS_TPRELGD));
6557
6558 if (offp == &htab->tlsld_got.offset)
6559 tls_m = TLS_LD;
6560 else if (h == NULL
6561 || !h->def_dynamic)
6562 tls_m &= ~TLS_LD;
6563
6564 /* We might have multiple got entries for this sym.
6565 Initialize them all. */
6566 do
6567 {
6568 int tls_ty = 0;
6569
6570 if ((tls_m & TLS_LD) != 0)
6571 {
6572 tls_ty = TLS_TLS | TLS_LD;
6573 tls_m &= ~TLS_LD;
6574 }
6575 else if ((tls_m & TLS_GD) != 0)
6576 {
6577 tls_ty = TLS_TLS | TLS_GD;
6578 tls_m &= ~TLS_GD;
6579 }
6580 else if ((tls_m & TLS_DTPREL) != 0)
6581 {
6582 tls_ty = TLS_TLS | TLS_DTPREL;
6583 tls_m &= ~TLS_DTPREL;
6584 }
6585 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
6586 {
6587 tls_ty = TLS_TLS | TLS_TPREL;
6588 tls_m = 0;
6589 }
6590
6591 /* Generate relocs for the dynamic linker. */
6592 if ((info->shared || indx != 0)
6593 && (offp == &htab->tlsld_got.offset
6594 || h == NULL
6595 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6596 || h->root.type != bfd_link_hash_undefweak))
6597 {
6598 outrel.r_offset = (htab->got->output_section->vma
6599 + htab->got->output_offset
6600 + off);
6601 outrel.r_addend = 0;
6602 if (tls_ty & (TLS_LD | TLS_GD))
6603 {
6604 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6605 if (tls_ty == (TLS_TLS | TLS_GD))
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,
6611 &outrel, loc);
6612 outrel.r_offset += 4;
6613 outrel.r_info
6614 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6615 }
6616 }
6617 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6618 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6619 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6620 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6621 else if (indx == 0)
6622 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6623 else
6624 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6625 if (indx == 0 && tls_ty != (TLS_TLS | TLS_LD))
6626 {
6627 outrel.r_addend += relocation;
6628 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6629 outrel.r_addend -= htab->elf.tls_sec->vma;
6630 }
6631 loc = htab->relgot->contents;
6632 loc += (htab->relgot->reloc_count++
6633 * sizeof (Elf32_External_Rela));
6634 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6635 }
6636
6637 /* Init the .got section contents if we're not
6638 emitting a reloc. */
6639 else
6640 {
6641 bfd_vma value = relocation;
6642
6643 if (tls_ty == (TLS_TLS | TLS_LD))
6644 value = 1;
6645 else if (tls_ty != 0)
6646 {
6647 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6648 if (tls_ty == (TLS_TLS | TLS_TPREL))
6649 value += DTP_OFFSET - TP_OFFSET;
6650
6651 if (tls_ty == (TLS_TLS | TLS_GD))
6652 {
6653 bfd_put_32 (output_bfd, value,
6654 htab->got->contents + off + 4);
6655 value = 1;
6656 }
6657 }
6658 bfd_put_32 (output_bfd, value,
6659 htab->got->contents + off);
6660 }
6661
6662 off += 4;
6663 if (tls_ty & (TLS_LD | TLS_GD))
6664 off += 4;
6665 }
6666 while (tls_m != 0);
6667
6668 off = *offp;
6669 *offp = off | 1;
6670 }
6671
6672 if (off >= (bfd_vma) -2)
6673 abort ();
6674
6675 if ((tls_type & TLS_TLS) != 0)
6676 {
6677 if (tls_type != (TLS_TLS | TLS_LD))
6678 {
6679 if ((tls_mask & TLS_LD) != 0
6680 && !(h == NULL
6681 || !h->def_dynamic))
6682 off += 8;
6683 if (tls_type != (TLS_TLS | TLS_GD))
6684 {
6685 if ((tls_mask & TLS_GD) != 0)
6686 off += 8;
6687 if (tls_type != (TLS_TLS | TLS_DTPREL))
6688 {
6689 if ((tls_mask & TLS_DTPREL) != 0)
6690 off += 4;
6691 }
6692 }
6693 }
6694 }
6695
6696 relocation = (htab->got->output_section->vma
6697 + htab->got->output_offset
6698 + off
6699 - SYM_VAL (htab->elf.hgot));
6700
6701 /* Addends on got relocations don't make much sense.
6702 x+off@got is actually x@got+off, and since the got is
6703 generated by a hash table traversal, the value in the
6704 got at entry m+n bears little relation to the entry m. */
6705 if (addend != 0)
6706 (*_bfd_error_handler)
6707 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6708 input_bfd,
6709 input_section,
6710 (long) rel->r_offset,
6711 howto->name,
6712 sym_name);
6713 }
6714 break;
6715
6716 /* Relocations that need no special processing. */
6717 case R_PPC_LOCAL24PC:
6718 /* It makes no sense to point a local relocation
6719 at a symbol not in this object. */
6720 if (unresolved_reloc)
6721 {
6722 if (! (*info->callbacks->undefined_symbol) (info,
6723 h->root.root.string,
6724 input_bfd,
6725 input_section,
6726 rel->r_offset,
6727 TRUE))
6728 return FALSE;
6729 continue;
6730 }
6731 break;
6732
6733 case R_PPC_DTPREL16:
6734 case R_PPC_DTPREL16_LO:
6735 case R_PPC_DTPREL16_HI:
6736 case R_PPC_DTPREL16_HA:
6737 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6738 break;
6739
6740 /* Relocations that may need to be propagated if this is a shared
6741 object. */
6742 case R_PPC_TPREL16:
6743 case R_PPC_TPREL16_LO:
6744 case R_PPC_TPREL16_HI:
6745 case R_PPC_TPREL16_HA:
6746 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6747 /* The TPREL16 relocs shouldn't really be used in shared
6748 libs as they will result in DT_TEXTREL being set, but
6749 support them anyway. */
6750 goto dodyn;
6751
6752 case R_PPC_TPREL32:
6753 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6754 goto dodyn;
6755
6756 case R_PPC_DTPREL32:
6757 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6758 goto dodyn;
6759
6760 case R_PPC_DTPMOD32:
6761 relocation = 1;
6762 addend = 0;
6763 goto dodyn;
6764
6765 case R_PPC_REL16:
6766 case R_PPC_REL16_LO:
6767 case R_PPC_REL16_HI:
6768 case R_PPC_REL16_HA:
6769 break;
6770
6771 case R_PPC_REL32:
6772 if (h == NULL || h == htab->elf.hgot)
6773 break;
6774 /* fall through */
6775
6776 case R_PPC_ADDR32:
6777 case R_PPC_ADDR16:
6778 case R_PPC_ADDR16_LO:
6779 case R_PPC_ADDR16_HI:
6780 case R_PPC_ADDR16_HA:
6781 case R_PPC_UADDR32:
6782 case R_PPC_UADDR16:
6783 goto dodyn;
6784
6785 case R_PPC_REL24:
6786 case R_PPC_REL14:
6787 case R_PPC_REL14_BRTAKEN:
6788 case R_PPC_REL14_BRNTAKEN:
6789 /* If these relocations are not to a named symbol, they can be
6790 handled right here, no need to bother the dynamic linker. */
6791 if (SYMBOL_CALLS_LOCAL (info, h)
6792 || h == htab->elf.hgot)
6793 break;
6794 /* fall through */
6795
6796 case R_PPC_ADDR24:
6797 case R_PPC_ADDR14:
6798 case R_PPC_ADDR14_BRTAKEN:
6799 case R_PPC_ADDR14_BRNTAKEN:
6800 if (h != NULL && !info->shared)
6801 break;
6802 /* fall through */
6803
6804 dodyn:
6805 if ((input_section->flags & SEC_ALLOC) == 0
6806 || is_vxworks_tls)
6807 break;
6808
6809 if ((info->shared
6810 && !(h != NULL
6811 && ((h->root.type == bfd_link_hash_undefined
6812 && (ELF_ST_VISIBILITY (h->other) == STV_HIDDEN
6813 || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL))
6814 || (h->root.type == bfd_link_hash_undefweak
6815 && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)))
6816 && (must_be_dyn_reloc (info, r_type)
6817 || !SYMBOL_CALLS_LOCAL (info, h)))
6818 || (ELIMINATE_COPY_RELOCS
6819 && !info->shared
6820 && h != NULL
6821 && h->dynindx != -1
6822 && !h->non_got_ref
6823 && !h->def_regular))
6824 {
6825 int skip;
6826
6827 #ifdef DEBUG
6828 fprintf (stderr, "ppc_elf_relocate_section needs to "
6829 "create relocation for %s\n",
6830 (h && h->root.root.string
6831 ? h->root.root.string : "<unknown>"));
6832 #endif
6833
6834 /* When generating a shared object, these relocations
6835 are copied into the output file to be resolved at run
6836 time. */
6837 if (sreloc == NULL)
6838 {
6839 const char *name;
6840
6841 name = (bfd_elf_string_from_elf_section
6842 (input_bfd,
6843 elf_elfheader (input_bfd)->e_shstrndx,
6844 elf_section_data (input_section)->rel_hdr.sh_name));
6845 if (name == NULL)
6846 return FALSE;
6847
6848 BFD_ASSERT (CONST_STRNEQ (name, ".rela")
6849 && strcmp (bfd_get_section_name (input_bfd,
6850 input_section),
6851 name + 5) == 0);
6852
6853 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6854 BFD_ASSERT (sreloc != NULL);
6855 }
6856
6857 skip = 0;
6858 outrel.r_offset =
6859 _bfd_elf_section_offset (output_bfd, info, input_section,
6860 rel->r_offset);
6861 if (outrel.r_offset == (bfd_vma) -1
6862 || outrel.r_offset == (bfd_vma) -2)
6863 skip = (int) outrel.r_offset;
6864 outrel.r_offset += (input_section->output_section->vma
6865 + input_section->output_offset);
6866
6867 if (skip)
6868 memset (&outrel, 0, sizeof outrel);
6869 else if ((h != NULL
6870 && (h->root.type == bfd_link_hash_undefined
6871 || h->root.type == bfd_link_hash_undefweak))
6872 || !SYMBOL_REFERENCES_LOCAL (info, h))
6873 {
6874 unresolved_reloc = FALSE;
6875 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6876 outrel.r_addend = rel->r_addend;
6877 }
6878 else
6879 {
6880 outrel.r_addend = relocation + rel->r_addend;
6881
6882 if (r_type == R_PPC_ADDR32)
6883 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6884 else
6885 {
6886 long indx = 0;
6887
6888 if (r_symndx == 0 || bfd_is_abs_section (sec))
6889 ;
6890 else if (sec == NULL || sec->owner == NULL)
6891 {
6892 bfd_set_error (bfd_error_bad_value);
6893 ret = FALSE;
6894 }
6895 else
6896 {
6897 asection *osec;
6898
6899 /* We are turning this relocation into one
6900 against a section symbol. It would be
6901 proper to subtract the symbol's value,
6902 osec->vma, from the emitted reloc addend,
6903 but ld.so expects buggy relocs. */
6904 osec = sec->output_section;
6905 indx = elf_section_data (osec)->dynindx;
6906 if (indx == 0)
6907 {
6908 osec = htab->elf.text_index_section;
6909 indx = elf_section_data (osec)->dynindx;
6910 }
6911 BFD_ASSERT (indx != 0);
6912 #ifdef DEBUG
6913 if (indx == 0)
6914 printf ("indx=%ld section=%s flags=%08x name=%s\n",
6915 indx, osec->name, osec->flags,
6916 h->root.root.string);
6917 #endif
6918 }
6919
6920 outrel.r_info = ELF32_R_INFO (indx, r_type);
6921 }
6922 }
6923
6924 loc = sreloc->contents;
6925 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6926 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6927
6928 if (skip == -1)
6929 continue;
6930
6931 /* This reloc will be computed at runtime. We clear the memory
6932 so that it contains predictable value. */
6933 if (! skip
6934 && ((input_section->flags & SEC_ALLOC) != 0
6935 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6936 {
6937 relocation = howto->pc_relative ? outrel.r_offset : 0;
6938 addend = 0;
6939 break;
6940 }
6941 }
6942 break;
6943
6944 case R_PPC_RELAX32PC_PLT:
6945 case R_PPC_RELAX32_PLT:
6946 {
6947 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6948
6949 if (htab->plt_type == PLT_NEW)
6950 relocation = (htab->glink->output_section->vma
6951 + htab->glink->output_offset
6952 + ent->glink_offset);
6953 else
6954 relocation = (htab->plt->output_section->vma
6955 + htab->plt->output_offset
6956 + ent->plt.offset);
6957 }
6958 if (r_type == R_PPC_RELAX32_PLT)
6959 goto relax32;
6960 /* Fall thru */
6961
6962 case R_PPC_RELAX32PC:
6963 relocation -= (input_section->output_section->vma
6964 + input_section->output_offset
6965 + rel->r_offset - 4);
6966 /* Fall thru */
6967
6968 case R_PPC_RELAX32:
6969 relax32:
6970 {
6971 unsigned long t0;
6972 unsigned long t1;
6973
6974 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6975 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6976
6977 /* We're clearing the bits for R_PPC_ADDR16_HA
6978 and R_PPC_ADDR16_LO here. */
6979 t0 &= ~0xffff;
6980 t1 &= ~0xffff;
6981
6982 /* t0 is HA, t1 is LO */
6983 relocation += addend;
6984 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6985 t1 |= relocation & 0xffff;
6986
6987 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6988 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6989 }
6990 continue;
6991
6992 /* Indirect .sdata relocation. */
6993 case R_PPC_EMB_SDAI16:
6994 BFD_ASSERT (htab->sdata[0].section != NULL);
6995 relocation
6996 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6997 h, relocation, rel);
6998 break;
6999
7000 /* Indirect .sdata2 relocation. */
7001 case R_PPC_EMB_SDA2I16:
7002 BFD_ASSERT (htab->sdata[1].section != NULL);
7003 relocation
7004 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
7005 h, relocation, rel);
7006 break;
7007
7008 /* Handle the TOC16 reloc. We want to use the offset within the .got
7009 section, not the actual VMA. This is appropriate when generating
7010 an embedded ELF object, for which the .got section acts like the
7011 AIX .toc section. */
7012 case R_PPC_TOC16: /* phony GOT16 relocations */
7013 if (sec == NULL || sec->output_section == NULL)
7014 {
7015 unresolved_reloc = TRUE;
7016 break;
7017 }
7018 BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
7019 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
7020
7021 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
7022 break;
7023
7024 case R_PPC_PLTREL24:
7025 /* Relocation is to the entry for this symbol in the
7026 procedure linkage table. */
7027 {
7028 struct plt_entry *ent = find_plt_ent (h, got2, addend);
7029
7030 addend = 0;
7031 if (ent == NULL
7032 || htab->plt == NULL)
7033 {
7034 /* We didn't make a PLT entry for this symbol. This
7035 happens when statically linking PIC code, or when
7036 using -Bsymbolic. */
7037 break;
7038 }
7039
7040 unresolved_reloc = FALSE;
7041 if (htab->plt_type == PLT_NEW)
7042 relocation = (htab->glink->output_section->vma
7043 + htab->glink->output_offset
7044 + ent->glink_offset);
7045 else
7046 relocation = (htab->plt->output_section->vma
7047 + htab->plt->output_offset
7048 + ent->plt.offset);
7049 }
7050 break;
7051
7052 /* Relocate against _SDA_BASE_. */
7053 case R_PPC_SDAREL16:
7054 {
7055 const char *name;
7056
7057 if (sec == NULL || sec->output_section == NULL)
7058 {
7059 unresolved_reloc = TRUE;
7060 break;
7061 }
7062
7063 name = bfd_get_section_name (abfd, sec->output_section);
7064 if (! ((CONST_STRNEQ (name, ".sdata")
7065 && (name[6] == 0 || name[6] == '.'))
7066 || (CONST_STRNEQ (name, ".sbss")
7067 && (name[5] == 0 || name[5] == '.'))))
7068 {
7069 (*_bfd_error_handler)
7070 (_("%B: the target (%s) of a %s relocation is "
7071 "in the wrong output section (%s)"),
7072 input_bfd,
7073 sym_name,
7074 howto->name,
7075 name);
7076 }
7077 addend -= SYM_VAL (htab->sdata[0].sym);
7078 }
7079 break;
7080
7081 /* Relocate against _SDA2_BASE_. */
7082 case R_PPC_EMB_SDA2REL:
7083 {
7084 const char *name;
7085
7086 if (sec == NULL || sec->output_section == NULL)
7087 {
7088 unresolved_reloc = TRUE;
7089 break;
7090 }
7091
7092 name = bfd_get_section_name (abfd, sec->output_section);
7093 if (! (CONST_STRNEQ (name, ".sdata2")
7094 || CONST_STRNEQ (name, ".sbss2")))
7095 {
7096 (*_bfd_error_handler)
7097 (_("%B: the target (%s) of a %s relocation is "
7098 "in the wrong output section (%s)"),
7099 input_bfd,
7100 sym_name,
7101 howto->name,
7102 name);
7103
7104 bfd_set_error (bfd_error_bad_value);
7105 ret = FALSE;
7106 continue;
7107 }
7108 addend -= SYM_VAL (htab->sdata[1].sym);
7109 }
7110 break;
7111
7112 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
7113 case R_PPC_EMB_SDA21:
7114 case R_PPC_EMB_RELSDA:
7115 {
7116 const char *name;
7117 int reg;
7118
7119 if (sec == NULL || sec->output_section == NULL)
7120 {
7121 unresolved_reloc = TRUE;
7122 break;
7123 }
7124
7125 name = bfd_get_section_name (abfd, sec->output_section);
7126 if (((CONST_STRNEQ (name, ".sdata")
7127 && (name[6] == 0 || name[6] == '.'))
7128 || (CONST_STRNEQ (name, ".sbss")
7129 && (name[5] == 0 || name[5] == '.'))))
7130 {
7131 reg = 13;
7132 addend -= SYM_VAL (htab->sdata[0].sym);
7133 }
7134 else if (CONST_STRNEQ (name, ".sdata2")
7135 || CONST_STRNEQ (name, ".sbss2"))
7136 {
7137 reg = 2;
7138 addend -= SYM_VAL (htab->sdata[1].sym);
7139 }
7140 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
7141 || strcmp (name, ".PPC.EMB.sbss0") == 0)
7142 {
7143 reg = 0;
7144 }
7145 else
7146 {
7147 (*_bfd_error_handler)
7148 (_("%B: the target (%s) of a %s relocation is "
7149 "in the wrong output section (%s)"),
7150 input_bfd,
7151 sym_name,
7152 howto->name,
7153 name);
7154
7155 bfd_set_error (bfd_error_bad_value);
7156 ret = FALSE;
7157 continue;
7158 }
7159
7160 if (r_type == R_PPC_EMB_SDA21)
7161 { /* fill in register field */
7162 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
7163 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
7164 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
7165 }
7166 }
7167 break;
7168
7169 /* Relocate against the beginning of the section. */
7170 case R_PPC_SECTOFF:
7171 case R_PPC_SECTOFF_LO:
7172 case R_PPC_SECTOFF_HI:
7173 case R_PPC_SECTOFF_HA:
7174 if (sec == NULL || sec->output_section == NULL)
7175 {
7176 unresolved_reloc = TRUE;
7177 break;
7178 }
7179 addend -= sec->output_section->vma;
7180 break;
7181
7182 /* Negative relocations. */
7183 case R_PPC_EMB_NADDR32:
7184 case R_PPC_EMB_NADDR16:
7185 case R_PPC_EMB_NADDR16_LO:
7186 case R_PPC_EMB_NADDR16_HI:
7187 case R_PPC_EMB_NADDR16_HA:
7188 addend -= 2 * relocation;
7189 break;
7190
7191 case R_PPC_COPY:
7192 case R_PPC_GLOB_DAT:
7193 case R_PPC_JMP_SLOT:
7194 case R_PPC_RELATIVE:
7195 case R_PPC_PLT32:
7196 case R_PPC_PLTREL32:
7197 case R_PPC_PLT16_LO:
7198 case R_PPC_PLT16_HI:
7199 case R_PPC_PLT16_HA:
7200 case R_PPC_ADDR30:
7201 case R_PPC_EMB_RELSEC16:
7202 case R_PPC_EMB_RELST_LO:
7203 case R_PPC_EMB_RELST_HI:
7204 case R_PPC_EMB_RELST_HA:
7205 case R_PPC_EMB_BIT_FLD:
7206 (*_bfd_error_handler)
7207 (_("%B: relocation %s is not yet supported for symbol %s."),
7208 input_bfd,
7209 howto->name,
7210 sym_name);
7211
7212 bfd_set_error (bfd_error_invalid_operation);
7213 ret = FALSE;
7214 continue;
7215 }
7216
7217 /* Do any further special processing. */
7218 switch (r_type)
7219 {
7220 default:
7221 break;
7222
7223 case R_PPC_ADDR16_HA:
7224 case R_PPC_REL16_HA:
7225 case R_PPC_SECTOFF_HA:
7226 case R_PPC_TPREL16_HA:
7227 case R_PPC_DTPREL16_HA:
7228 case R_PPC_EMB_NADDR16_HA:
7229 case R_PPC_EMB_RELST_HA:
7230 /* It's just possible that this symbol is a weak symbol
7231 that's not actually defined anywhere. In that case,
7232 'sec' would be NULL, and we should leave the symbol
7233 alone (it will be set to zero elsewhere in the link). */
7234 if (sec == NULL)
7235 break;
7236 /* Fall thru */
7237
7238 case R_PPC_PLT16_HA:
7239 case R_PPC_GOT16_HA:
7240 case R_PPC_GOT_TLSGD16_HA:
7241 case R_PPC_GOT_TLSLD16_HA:
7242 case R_PPC_GOT_TPREL16_HA:
7243 case R_PPC_GOT_DTPREL16_HA:
7244 /* Add 0x10000 if sign bit in 0:15 is set.
7245 Bits 0:15 are not used. */
7246 addend += 0x8000;
7247 break;
7248 }
7249
7250 #ifdef DEBUG
7251 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
7252 "offset = %ld, addend = %ld\n",
7253 howto->name,
7254 (int) r_type,
7255 sym_name,
7256 r_symndx,
7257 (long) rel->r_offset,
7258 (long) addend);
7259 #endif
7260
7261 if (unresolved_reloc
7262 && !((input_section->flags & SEC_DEBUGGING) != 0
7263 && h->def_dynamic))
7264 {
7265 (*_bfd_error_handler)
7266 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
7267 input_bfd,
7268 input_section,
7269 (long) rel->r_offset,
7270 howto->name,
7271 sym_name);
7272 ret = FALSE;
7273 }
7274
7275 r = _bfd_final_link_relocate (howto,
7276 input_bfd,
7277 input_section,
7278 contents,
7279 rel->r_offset,
7280 relocation,
7281 addend);
7282
7283 if (r != bfd_reloc_ok)
7284 {
7285 if (r == bfd_reloc_overflow)
7286 {
7287 if (warned)
7288 continue;
7289 if (h != NULL
7290 && h->root.type == bfd_link_hash_undefweak
7291 && howto->pc_relative)
7292 {
7293 /* Assume this is a call protected by other code that
7294 detect the symbol is undefined. If this is the case,
7295 we can safely ignore the overflow. If not, the
7296 program is hosed anyway, and a little warning isn't
7297 going to help. */
7298
7299 continue;
7300 }
7301
7302 if (! (*info->callbacks->reloc_overflow) (info,
7303 (h ? &h->root : NULL),
7304 sym_name,
7305 howto->name,
7306 rel->r_addend,
7307 input_bfd,
7308 input_section,
7309 rel->r_offset))
7310 return FALSE;
7311 }
7312 else
7313 {
7314 (*_bfd_error_handler)
7315 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
7316 input_bfd, input_section,
7317 (long) rel->r_offset, howto->name, sym_name, (int) r);
7318 ret = FALSE;
7319 }
7320 }
7321 }
7322
7323 #ifdef DEBUG
7324 fprintf (stderr, "\n");
7325 #endif
7326
7327 return ret;
7328 }
7329 \f
7330 #define PPC_LO(v) ((v) & 0xffff)
7331 #define PPC_HI(v) (((v) >> 16) & 0xffff)
7332 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
7333
7334 /* Finish up dynamic symbol handling. We set the contents of various
7335 dynamic sections here. */
7336
7337 static bfd_boolean
7338 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
7339 struct bfd_link_info *info,
7340 struct elf_link_hash_entry *h,
7341 Elf_Internal_Sym *sym)
7342 {
7343 struct ppc_elf_link_hash_table *htab;
7344 struct plt_entry *ent;
7345 bfd_boolean doneone;
7346
7347 #ifdef DEBUG
7348 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
7349 h->root.root.string);
7350 #endif
7351
7352 htab = ppc_elf_hash_table (info);
7353 BFD_ASSERT (htab->elf.dynobj != NULL);
7354
7355 doneone = FALSE;
7356 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
7357 if (ent->plt.offset != (bfd_vma) -1)
7358 {
7359 if (!doneone)
7360 {
7361 Elf_Internal_Rela rela;
7362 bfd_byte *loc;
7363 bfd_vma reloc_index;
7364
7365 if (htab->plt_type == PLT_NEW)
7366 reloc_index = ent->plt.offset / 4;
7367 else
7368 {
7369 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
7370 / htab->plt_slot_size);
7371 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
7372 && htab->plt_type == PLT_OLD)
7373 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
7374 }
7375
7376 /* This symbol has an entry in the procedure linkage table.
7377 Set it up. */
7378 if (htab->plt_type == PLT_VXWORKS)
7379 {
7380 bfd_vma got_offset;
7381 const bfd_vma *plt_entry;
7382
7383 /* The first three entries in .got.plt are reserved. */
7384 got_offset = (reloc_index + 3) * 4;
7385
7386 /* Use the right PLT. */
7387 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
7388 : ppc_elf_vxworks_plt_entry;
7389
7390 /* Fill in the .plt on VxWorks. */
7391 if (info->shared)
7392 {
7393 bfd_put_32 (output_bfd,
7394 plt_entry[0] | PPC_HA (got_offset),
7395 htab->plt->contents + ent->plt.offset + 0);
7396 bfd_put_32 (output_bfd,
7397 plt_entry[1] | PPC_LO (got_offset),
7398 htab->plt->contents + ent->plt.offset + 4);
7399 }
7400 else
7401 {
7402 bfd_vma got_loc = got_offset + SYM_VAL (htab->elf.hgot);
7403
7404 bfd_put_32 (output_bfd,
7405 plt_entry[0] | PPC_HA (got_loc),
7406 htab->plt->contents + ent->plt.offset + 0);
7407 bfd_put_32 (output_bfd,
7408 plt_entry[1] | PPC_LO (got_loc),
7409 htab->plt->contents + ent->plt.offset + 4);
7410 }
7411
7412 bfd_put_32 (output_bfd, plt_entry[2],
7413 htab->plt->contents + ent->plt.offset + 8);
7414 bfd_put_32 (output_bfd, plt_entry[3],
7415 htab->plt->contents + ent->plt.offset + 12);
7416
7417 /* This instruction is an immediate load. The value loaded is
7418 the byte offset of the R_PPC_JMP_SLOT relocation from the
7419 start of the .rela.plt section. The value is stored in the
7420 low-order 16 bits of the load instruction. */
7421 /* NOTE: It appears that this is now an index rather than a
7422 prescaled offset. */
7423 bfd_put_32 (output_bfd,
7424 plt_entry[4] | reloc_index,
7425 htab->plt->contents + ent->plt.offset + 16);
7426 /* This instruction is a PC-relative branch whose target is
7427 the start of the PLT section. The address of this branch
7428 instruction is 20 bytes beyond the start of this PLT entry.
7429 The address is encoded in bits 6-29, inclusive. The value
7430 stored is right-shifted by two bits, permitting a 26-bit
7431 offset. */
7432 bfd_put_32 (output_bfd,
7433 (plt_entry[5]
7434 | (-(ent->plt.offset + 20) & 0x03fffffc)),
7435 htab->plt->contents + ent->plt.offset + 20);
7436 bfd_put_32 (output_bfd, plt_entry[6],
7437 htab->plt->contents + ent->plt.offset + 24);
7438 bfd_put_32 (output_bfd, plt_entry[7],
7439 htab->plt->contents + ent->plt.offset + 28);
7440
7441 /* Fill in the GOT entry corresponding to this PLT slot with
7442 the address immediately after the the "bctr" instruction
7443 in this PLT entry. */
7444 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
7445 + htab->plt->output_offset
7446 + ent->plt.offset + 16),
7447 htab->sgotplt->contents + got_offset);
7448
7449 if (!info->shared)
7450 {
7451 /* Fill in a couple of entries in .rela.plt.unloaded. */
7452 loc = htab->srelplt2->contents
7453 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
7454 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
7455 * sizeof (Elf32_External_Rela));
7456
7457 /* Provide the @ha relocation for the first instruction. */
7458 rela.r_offset = (htab->plt->output_section->vma
7459 + htab->plt->output_offset
7460 + ent->plt.offset + 2);
7461 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7462 R_PPC_ADDR16_HA);
7463 rela.r_addend = got_offset;
7464 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7465 loc += sizeof (Elf32_External_Rela);
7466
7467 /* Provide the @l relocation for the second instruction. */
7468 rela.r_offset = (htab->plt->output_section->vma
7469 + htab->plt->output_offset
7470 + ent->plt.offset + 6);
7471 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
7472 R_PPC_ADDR16_LO);
7473 rela.r_addend = got_offset;
7474 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7475 loc += sizeof (Elf32_External_Rela);
7476
7477 /* Provide a relocation for the GOT entry corresponding to this
7478 PLT slot. Point it at the middle of the .plt entry. */
7479 rela.r_offset = (htab->sgotplt->output_section->vma
7480 + htab->sgotplt->output_offset
7481 + got_offset);
7482 rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
7483 R_PPC_ADDR32);
7484 rela.r_addend = ent->plt.offset + 16;
7485 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7486 }
7487
7488 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
7489 In particular, the offset for the relocation is not the
7490 address of the PLT entry for this function, as specified
7491 by the ABI. Instead, the offset is set to the address of
7492 the GOT slot for this function. See EABI 4.4.4.1. */
7493 rela.r_offset = (htab->sgotplt->output_section->vma
7494 + htab->sgotplt->output_offset
7495 + got_offset);
7496
7497 }
7498 else
7499 {
7500 rela.r_offset = (htab->plt->output_section->vma
7501 + htab->plt->output_offset
7502 + ent->plt.offset);
7503 if (htab->plt_type == PLT_OLD)
7504 {
7505 /* We don't need to fill in the .plt. The ppc dynamic
7506 linker will fill it in. */
7507 }
7508 else
7509 {
7510 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
7511 + htab->glink->output_section->vma
7512 + htab->glink->output_offset);
7513 bfd_put_32 (output_bfd, val,
7514 htab->plt->contents + ent->plt.offset);
7515 }
7516 }
7517
7518 /* Fill in the entry in the .rela.plt section. */
7519 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
7520 rela.r_addend = 0;
7521
7522 loc = (htab->relplt->contents
7523 + reloc_index * sizeof (Elf32_External_Rela));
7524 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7525
7526 if (!h->def_regular)
7527 {
7528 /* Mark the symbol as undefined, rather than as
7529 defined in the .plt section. Leave the value if
7530 there were any relocations where pointer equality
7531 matters (this is a clue for the dynamic linker, to
7532 make function pointer comparisons work between an
7533 application and shared library), otherwise set it
7534 to zero. */
7535 sym->st_shndx = SHN_UNDEF;
7536 if (!h->pointer_equality_needed)
7537 sym->st_value = 0;
7538 else if (!h->ref_regular_nonweak)
7539 {
7540 /* This breaks function pointer comparisons, but
7541 that is better than breaking tests for a NULL
7542 function pointer. */
7543 sym->st_value = 0;
7544 }
7545 }
7546 doneone = TRUE;
7547 }
7548
7549 if (htab->plt_type == PLT_NEW)
7550 {
7551 bfd_vma plt;
7552 unsigned char *p;
7553
7554 plt = (ent->plt.offset
7555 + htab->plt->output_section->vma
7556 + htab->plt->output_offset);
7557 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
7558
7559 if (info->shared || info->pie)
7560 {
7561 bfd_vma got = 0;
7562
7563 if (ent->addend >= 32768)
7564 got = (ent->addend
7565 + ent->sec->output_section->vma
7566 + ent->sec->output_offset);
7567 else if (htab->elf.hgot != NULL)
7568 got = SYM_VAL (htab->elf.hgot);
7569
7570 plt -= got;
7571
7572 if (plt + 0x8000 < 0x10000)
7573 {
7574 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
7575 p += 4;
7576 bfd_put_32 (output_bfd, MTCTR_11, p);
7577 p += 4;
7578 bfd_put_32 (output_bfd, BCTR, p);
7579 p += 4;
7580 bfd_put_32 (output_bfd, NOP, p);
7581 p += 4;
7582 }
7583 else
7584 {
7585 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
7586 p += 4;
7587 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7588 p += 4;
7589 bfd_put_32 (output_bfd, MTCTR_11, p);
7590 p += 4;
7591 bfd_put_32 (output_bfd, BCTR, p);
7592 p += 4;
7593 }
7594 }
7595 else
7596 {
7597 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
7598 p += 4;
7599 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
7600 p += 4;
7601 bfd_put_32 (output_bfd, MTCTR_11, p);
7602 p += 4;
7603 bfd_put_32 (output_bfd, BCTR, p);
7604 p += 4;
7605
7606 /* We only need one non-PIC glink stub. */
7607 break;
7608 }
7609 }
7610 else
7611 break;
7612 }
7613
7614 if (h->needs_copy)
7615 {
7616 asection *s;
7617 Elf_Internal_Rela rela;
7618 bfd_byte *loc;
7619
7620 /* This symbols needs a copy reloc. Set it up. */
7621
7622 #ifdef DEBUG
7623 fprintf (stderr, ", copy");
7624 #endif
7625
7626 BFD_ASSERT (h->dynindx != -1);
7627
7628 if (ppc_elf_hash_entry (h)->has_sda_refs)
7629 s = htab->relsbss;
7630 else
7631 s = htab->relbss;
7632 BFD_ASSERT (s != NULL);
7633
7634 rela.r_offset = SYM_VAL (h);
7635 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7636 rela.r_addend = 0;
7637 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7638 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7639 }
7640
7641 #ifdef DEBUG
7642 fprintf (stderr, "\n");
7643 #endif
7644
7645 /* Mark some specially defined symbols as absolute. */
7646 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7647 || (!htab->is_vxworks
7648 && (h == htab->elf.hgot
7649 || strcmp (h->root.root.string,
7650 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7651 sym->st_shndx = SHN_ABS;
7652
7653 return TRUE;
7654 }
7655 \f
7656 static enum elf_reloc_type_class
7657 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7658 {
7659 switch (ELF32_R_TYPE (rela->r_info))
7660 {
7661 case R_PPC_RELATIVE:
7662 return reloc_class_relative;
7663 case R_PPC_REL24:
7664 case R_PPC_ADDR24:
7665 case R_PPC_JMP_SLOT:
7666 return reloc_class_plt;
7667 case R_PPC_COPY:
7668 return reloc_class_copy;
7669 default:
7670 return reloc_class_normal;
7671 }
7672 }
7673 \f
7674 /* Finish up the dynamic sections. */
7675
7676 static bfd_boolean
7677 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7678 struct bfd_link_info *info)
7679 {
7680 asection *sdyn;
7681 asection *splt;
7682 struct ppc_elf_link_hash_table *htab;
7683 bfd_vma got;
7684 bfd *dynobj;
7685 bfd_boolean ret = TRUE;
7686
7687 #ifdef DEBUG
7688 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7689 #endif
7690
7691 htab = ppc_elf_hash_table (info);
7692 dynobj = elf_hash_table (info)->dynobj;
7693 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7694 if (htab->is_vxworks)
7695 splt = bfd_get_section_by_name (dynobj, ".plt");
7696 else
7697 splt = NULL;
7698
7699 got = 0;
7700 if (htab->elf.hgot != NULL)
7701 got = SYM_VAL (htab->elf.hgot);
7702
7703 if (htab->elf.dynamic_sections_created)
7704 {
7705 Elf32_External_Dyn *dyncon, *dynconend;
7706
7707 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7708
7709 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7710 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7711 for (; dyncon < dynconend; dyncon++)
7712 {
7713 Elf_Internal_Dyn dyn;
7714 asection *s;
7715
7716 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7717
7718 switch (dyn.d_tag)
7719 {
7720 case DT_PLTGOT:
7721 if (htab->is_vxworks)
7722 s = htab->sgotplt;
7723 else
7724 s = htab->plt;
7725 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7726 break;
7727
7728 case DT_PLTRELSZ:
7729 dyn.d_un.d_val = htab->relplt->size;
7730 break;
7731
7732 case DT_JMPREL:
7733 s = htab->relplt;
7734 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7735 break;
7736
7737 case DT_PPC_GOT:
7738 dyn.d_un.d_ptr = got;
7739 break;
7740
7741 case DT_RELASZ:
7742 if (htab->is_vxworks)
7743 {
7744 if (htab->relplt)
7745 dyn.d_un.d_ptr -= htab->relplt->size;
7746 break;
7747 }
7748 continue;
7749
7750 default:
7751 if (htab->is_vxworks
7752 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
7753 break;
7754 continue;
7755 }
7756
7757 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7758 }
7759 }
7760
7761 if (htab->got != NULL)
7762 {
7763 if (htab->elf.hgot->root.u.def.section == htab->got
7764 || htab->elf.hgot->root.u.def.section == htab->sgotplt)
7765 {
7766 unsigned char *p = htab->elf.hgot->root.u.def.section->contents;
7767
7768 p += htab->elf.hgot->root.u.def.value;
7769 if (htab->plt_type == PLT_OLD)
7770 {
7771 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4
7772 so that a function can easily find the address of
7773 _GLOBAL_OFFSET_TABLE_. */
7774 BFD_ASSERT (htab->elf.hgot->root.u.def.value - 4
7775 < htab->elf.hgot->root.u.def.section->size);
7776 bfd_put_32 (output_bfd, 0x4e800021, p - 4);
7777 }
7778
7779 if (sdyn != NULL)
7780 {
7781 bfd_vma val = sdyn->output_section->vma + sdyn->output_offset;
7782 BFD_ASSERT (htab->elf.hgot->root.u.def.value
7783 < htab->elf.hgot->root.u.def.section->size);
7784 bfd_put_32 (output_bfd, val, p);
7785 }
7786 }
7787 else
7788 {
7789 (*_bfd_error_handler) (_("%s not defined in linker created %s"),
7790 htab->elf.hgot->root.root.string,
7791 (htab->sgotplt != NULL
7792 ? htab->sgotplt->name : htab->got->name));
7793 bfd_set_error (bfd_error_bad_value);
7794 ret = FALSE;
7795 }
7796
7797 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7798 }
7799
7800 /* Fill in the first entry in the VxWorks procedure linkage table. */
7801 if (splt && splt->size > 0)
7802 {
7803 /* Use the right PLT. */
7804 static const bfd_vma *plt_entry = NULL;
7805 plt_entry = info->shared ?
7806 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7807
7808 if (!info->shared)
7809 {
7810 bfd_vma got_value = SYM_VAL (htab->elf.hgot);
7811
7812 bfd_put_32 (output_bfd, plt_entry[0] | PPC_HA (got_value),
7813 splt->contents + 0);
7814 bfd_put_32 (output_bfd, plt_entry[1] | PPC_LO (got_value),
7815 splt->contents + 4);
7816 }
7817 else
7818 {
7819 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7820 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7821 }
7822 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7823 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7824 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7825 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7826 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7827 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7828
7829 if (! info->shared)
7830 {
7831 Elf_Internal_Rela rela;
7832 bfd_byte *loc;
7833
7834 loc = htab->srelplt2->contents;
7835
7836 /* Output the @ha relocation for the first instruction. */
7837 rela.r_offset = (htab->plt->output_section->vma
7838 + htab->plt->output_offset
7839 + 2);
7840 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7841 rela.r_addend = 0;
7842 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7843 loc += sizeof (Elf32_External_Rela);
7844
7845 /* Output the @l relocation for the second instruction. */
7846 rela.r_offset = (htab->plt->output_section->vma
7847 + htab->plt->output_offset
7848 + 6);
7849 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7850 rela.r_addend = 0;
7851 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7852 loc += sizeof (Elf32_External_Rela);
7853
7854 /* Fix up the remaining relocations. They may have the wrong
7855 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7856 in which symbols were output. */
7857 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7858 {
7859 Elf_Internal_Rela rel;
7860
7861 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7862 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7863 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7864 loc += sizeof (Elf32_External_Rela);
7865
7866 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7867 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7868 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7869 loc += sizeof (Elf32_External_Rela);
7870
7871 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7872 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
7873 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7874 loc += sizeof (Elf32_External_Rela);
7875 }
7876 }
7877 }
7878
7879 if (htab->glink != NULL && htab->glink->contents != NULL)
7880 {
7881 unsigned char *p;
7882 unsigned char *endp;
7883 bfd_vma res0;
7884 unsigned int i;
7885
7886 /*
7887 * PIC glink code is the following:
7888 *
7889 * # ith PLT code stub.
7890 * addis 11,30,(plt+(i-1)*4-got)@ha
7891 * lwz 11,(plt+(i-1)*4-got)@l(11)
7892 * mtctr 11
7893 * bctr
7894 *
7895 * # A table of branches, one for each plt entry.
7896 * # The idea is that the plt call stub loads ctr and r11 with these
7897 * # addresses, so (r11 - res_0) gives the plt index * 4.
7898 * res_0: b PLTresolve
7899 * res_1: b PLTresolve
7900 * .
7901 * # Some number of entries towards the end can be nops
7902 * res_n_m3: nop
7903 * res_n_m2: nop
7904 * res_n_m1:
7905 *
7906 * PLTresolve:
7907 * addis 11,11,(1f-res_0)@ha
7908 * mflr 0
7909 * bcl 20,31,1f
7910 * 1: addi 11,11,(1b-res_0)@l
7911 * mflr 12
7912 * mtlr 0
7913 * sub 11,11,12 # r11 = index * 4
7914 * addis 12,12,(got+4-1b)@ha
7915 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7916 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7917 * mtctr 0
7918 * add 0,11,11
7919 * add 11,0,11 # r11 = index * 12 = reloc offset.
7920 * bctr
7921 */
7922 static const unsigned int pic_plt_resolve[] =
7923 {
7924 ADDIS_11_11,
7925 MFLR_0,
7926 BCL_20_31,
7927 ADDI_11_11,
7928 MFLR_12,
7929 MTLR_0,
7930 SUB_11_11_12,
7931 ADDIS_12_12,
7932 LWZ_0_12,
7933 LWZ_12_12,
7934 MTCTR_0,
7935 ADD_0_11_11,
7936 ADD_11_0_11,
7937 BCTR,
7938 NOP,
7939 NOP
7940 };
7941
7942 /*
7943 * Non-PIC glink code is a little simpler.
7944 *
7945 * # ith PLT code stub.
7946 * lis 11,(plt+(i-1)*4)@ha
7947 * lwz 11,(plt+(i-1)*4)@l(11)
7948 * mtctr 11
7949 * bctr
7950 *
7951 * The branch table is the same, then comes
7952 *
7953 * PLTresolve:
7954 * lis 12,(got+4)@ha
7955 * addis 11,11,(-res_0)@ha
7956 * lwz 0,(got+4)@l(12) # got[1] address of dl_runtime_resolve
7957 * addi 11,11,(-res_0)@l # r11 = index * 4
7958 * mtctr 0
7959 * add 0,11,11
7960 * lwz 12,(got+8)@l(12) # got[2] contains the map address
7961 * add 11,0,11 # r11 = index * 12 = reloc offset.
7962 * bctr
7963 */
7964 static const unsigned int plt_resolve[] =
7965 {
7966 LIS_12,
7967 ADDIS_11_11,
7968 LWZ_0_12,
7969 ADDI_11_11,
7970 MTCTR_0,
7971 ADD_0_11_11,
7972 LWZ_12_12,
7973 ADD_11_0_11,
7974 BCTR,
7975 NOP,
7976 NOP,
7977 NOP,
7978 NOP,
7979 NOP,
7980 NOP,
7981 NOP
7982 };
7983
7984 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7985 abort ();
7986 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7987 abort ();
7988
7989 /* Build the branch table, one for each plt entry (less one),
7990 and perhaps some padding. */
7991 p = htab->glink->contents;
7992 p += htab->glink_pltresolve;
7993 endp = htab->glink->contents;
7994 endp += htab->glink->size - GLINK_PLTRESOLVE;
7995 while (p < endp - 8 * 4)
7996 {
7997 bfd_put_32 (output_bfd, B + endp - p, p);
7998 p += 4;
7999 }
8000 while (p < endp)
8001 {
8002 bfd_put_32 (output_bfd, NOP, p);
8003 p += 4;
8004 }
8005
8006 res0 = (htab->glink_pltresolve
8007 + htab->glink->output_section->vma
8008 + htab->glink->output_offset);
8009
8010 /* Last comes the PLTresolve stub. */
8011 if (info->shared || info->pie)
8012 {
8013 bfd_vma bcl;
8014
8015 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
8016 {
8017 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
8018 p += 4;
8019 }
8020 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
8021
8022 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
8023 + htab->glink->output_section->vma
8024 + htab->glink->output_offset);
8025
8026 bfd_put_32 (output_bfd,
8027 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
8028 bfd_put_32 (output_bfd,
8029 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
8030 bfd_put_32 (output_bfd,
8031 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
8032 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
8033 {
8034 bfd_put_32 (output_bfd,
8035 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8036 bfd_put_32 (output_bfd,
8037 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
8038 }
8039 else
8040 {
8041 bfd_put_32 (output_bfd,
8042 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
8043 bfd_put_32 (output_bfd,
8044 LWZ_12_12 + 4, p + 9*4);
8045 }
8046 }
8047 else
8048 {
8049 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
8050 {
8051 bfd_put_32 (output_bfd, plt_resolve[i], p);
8052 p += 4;
8053 }
8054 p -= 4 * ARRAY_SIZE (plt_resolve);
8055
8056 bfd_put_32 (output_bfd,
8057 LIS_12 + PPC_HA (got + 4), p + 0*4);
8058 bfd_put_32 (output_bfd,
8059 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
8060 bfd_put_32 (output_bfd,
8061 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
8062 if (PPC_HA (got + 4) == PPC_HA (got + 8))
8063 {
8064 bfd_put_32 (output_bfd,
8065 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
8066 bfd_put_32 (output_bfd,
8067 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
8068 }
8069 else
8070 {
8071 bfd_put_32 (output_bfd,
8072 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
8073 bfd_put_32 (output_bfd,
8074 LWZ_12_12 + 4, p + 6*4);
8075 }
8076 }
8077 }
8078
8079 return ret;
8080 }
8081 \f
8082 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
8083 #define TARGET_LITTLE_NAME "elf32-powerpcle"
8084 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
8085 #define TARGET_BIG_NAME "elf32-powerpc"
8086 #define ELF_ARCH bfd_arch_powerpc
8087 #define ELF_MACHINE_CODE EM_PPC
8088 #ifdef __QNXTARGET__
8089 #define ELF_MAXPAGESIZE 0x1000
8090 #else
8091 #define ELF_MAXPAGESIZE 0x10000
8092 #endif
8093 #define ELF_MINPAGESIZE 0x1000
8094 #define ELF_COMMONPAGESIZE 0x1000
8095 #define elf_info_to_howto ppc_elf_info_to_howto
8096
8097 #ifdef EM_CYGNUS_POWERPC
8098 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
8099 #endif
8100
8101 #ifdef EM_PPC_OLD
8102 #define ELF_MACHINE_ALT2 EM_PPC_OLD
8103 #endif
8104
8105 #define elf_backend_plt_not_loaded 1
8106 #define elf_backend_can_gc_sections 1
8107 #define elf_backend_can_refcount 1
8108 #define elf_backend_rela_normal 1
8109
8110 #define bfd_elf32_mkobject ppc_elf_mkobject
8111 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
8112 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
8113 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
8114 #define bfd_elf32_bfd_reloc_name_lookup ppc_elf_reloc_name_lookup
8115 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
8116 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
8117 #define bfd_elf32_get_synthetic_symtab ppc_elf_get_synthetic_symtab
8118
8119 #define elf_backend_object_p ppc_elf_object_p
8120 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
8121 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
8122 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
8123 #define elf_backend_relocate_section ppc_elf_relocate_section
8124 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
8125 #define elf_backend_check_relocs ppc_elf_check_relocs
8126 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
8127 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
8128 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
8129 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
8130 #define elf_backend_hash_symbol ppc_elf_hash_symbol
8131 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
8132 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
8133 #define elf_backend_fake_sections ppc_elf_fake_sections
8134 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
8135 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
8136 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
8137 #define elf_backend_write_core_note ppc_elf_write_core_note
8138 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
8139 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
8140 #define elf_backend_final_write_processing ppc_elf_final_write_processing
8141 #define elf_backend_write_section ppc_elf_write_section
8142 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
8143 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
8144 #define elf_backend_action_discarded ppc_elf_action_discarded
8145 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
8146
8147 #include "elf32-target.h"
8148
8149 /* VxWorks Target */
8150
8151 #undef TARGET_LITTLE_SYM
8152 #undef TARGET_LITTLE_NAME
8153
8154 #undef TARGET_BIG_SYM
8155 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
8156 #undef TARGET_BIG_NAME
8157 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
8158
8159 /* VxWorks uses the elf default section flags for .plt. */
8160 static const struct bfd_elf_special_section *
8161 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
8162 {
8163 if (sec->name == NULL)
8164 return NULL;
8165
8166 if (strcmp (sec->name, ".plt") == 0)
8167 return _bfd_elf_get_sec_type_attr (abfd, sec);
8168
8169 return ppc_elf_get_sec_type_attr (abfd, sec);
8170 }
8171
8172 /* Like ppc_elf_link_hash_table_create, but overrides
8173 appropriately for VxWorks. */
8174 static struct bfd_link_hash_table *
8175 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
8176 {
8177 struct bfd_link_hash_table *ret;
8178
8179 ret = ppc_elf_link_hash_table_create (abfd);
8180 if (ret)
8181 {
8182 struct ppc_elf_link_hash_table *htab
8183 = (struct ppc_elf_link_hash_table *)ret;
8184 htab->is_vxworks = 1;
8185 htab->plt_type = PLT_VXWORKS;
8186 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
8187 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
8188 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
8189 }
8190 return ret;
8191 }
8192
8193 /* Tweak magic VxWorks symbols as they are loaded. */
8194 static bfd_boolean
8195 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
8196 struct bfd_link_info *info,
8197 Elf_Internal_Sym *sym,
8198 const char **namep ATTRIBUTE_UNUSED,
8199 flagword *flagsp ATTRIBUTE_UNUSED,
8200 asection **secp,
8201 bfd_vma *valp)
8202 {
8203 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
8204 valp))
8205 return FALSE;
8206
8207 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
8208 }
8209
8210 static void
8211 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
8212 {
8213 ppc_elf_final_write_processing(abfd, linker);
8214 elf_vxworks_final_write_processing(abfd, linker);
8215 }
8216
8217 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
8218 define it. */
8219 #undef elf_backend_want_plt_sym
8220 #define elf_backend_want_plt_sym 1
8221 #undef elf_backend_want_got_plt
8222 #define elf_backend_want_got_plt 1
8223 #undef elf_backend_got_symbol_offset
8224 #define elf_backend_got_symbol_offset 0
8225 #undef elf_backend_plt_not_loaded
8226 #define elf_backend_plt_not_loaded 0
8227 #undef elf_backend_plt_readonly
8228 #define elf_backend_plt_readonly 1
8229 #undef elf_backend_got_header_size
8230 #define elf_backend_got_header_size 12
8231
8232 #undef bfd_elf32_get_synthetic_symtab
8233
8234 #undef bfd_elf32_bfd_link_hash_table_create
8235 #define bfd_elf32_bfd_link_hash_table_create \
8236 ppc_elf_vxworks_link_hash_table_create
8237 #undef elf_backend_add_symbol_hook
8238 #define elf_backend_add_symbol_hook \
8239 ppc_elf_vxworks_add_symbol_hook
8240 #undef elf_backend_link_output_symbol_hook
8241 #define elf_backend_link_output_symbol_hook \
8242 elf_vxworks_link_output_symbol_hook
8243 #undef elf_backend_final_write_processing
8244 #define elf_backend_final_write_processing \
8245 ppc_elf_vxworks_final_write_processing
8246 #undef elf_backend_get_sec_type_attr
8247 #define elf_backend_get_sec_type_attr \
8248 ppc_elf_vxworks_get_sec_type_attr
8249 #undef elf_backend_emit_relocs
8250 #define elf_backend_emit_relocs \
8251 elf_vxworks_emit_relocs
8252
8253 #undef elf32_bed
8254 #define elf32_bed ppc_elf_vxworks_bed
8255
8256 #include "elf32-target.h"
GDB Binutils - Deliverables
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