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* elf32-ppc.c (allocate_dynrelocs): Tweak undef weak handling.
[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 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 2 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 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158 \f
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455 \f
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658 \f
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Associated symbol. */
1672 struct elf_link_hash_entry *sym;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931 \f
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211 \f
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 /* PPC ELF linker hash table. */
2317
2318 struct ppc_elf_link_hash_table
2319 {
2320 struct elf_link_hash_table elf;
2321
2322 /* Short-cuts to get to dynamic linker sections. */
2323 asection *got;
2324 asection *relgot;
2325 asection *glink;
2326 asection *plt;
2327 asection *relplt;
2328 asection *dynbss;
2329 asection *relbss;
2330 asection *dynsbss;
2331 asection *relsbss;
2332 elf_linker_section_t sdata[2];
2333 asection *sbss;
2334
2335 /* Shortcut to .__tls_get_addr. */
2336 struct elf_link_hash_entry *tls_get_addr;
2337
2338 /* TLS local dynamic got entry handling. */
2339 union {
2340 bfd_signed_vma refcount;
2341 bfd_vma offset;
2342 } tlsld_got;
2343
2344 /* Offset of PltResolve function in glink. */
2345 bfd_vma glink_pltresolve;
2346
2347 /* Size of reserved GOT entries. */
2348 unsigned int got_header_size;
2349 /* Non-zero if allocating the header left a gap. */
2350 unsigned int got_gap;
2351
2352 /* Whether to use new plt/got layout or not. */
2353 unsigned int new_plt:1;
2354 unsigned int old_plt:1;
2355
2356 /* Set if we should emit symbols for stubs. */
2357 unsigned int emit_stub_syms:1;
2358
2359 /* Small local sym to section mapping cache. */
2360 struct sym_sec_cache sym_sec;
2361
2362 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2363 asection *srelplt2;
2364
2365 /* The .got.plt section (VxWorks only)*/
2366 asection *sgotplt;
2367
2368 /* Short-cuts to frequently used symbols on VxWorks targets. */
2369 struct elf_link_hash_entry *hplt;
2370
2371 /* True if the target system is VxWorks. */
2372 int is_vxworks;
2373
2374 /* The size of PLT entries. */
2375 int plt_entry_size;
2376 /* The distance between adjacent PLT slots. */
2377 int plt_slot_size;
2378 /* The size of the first PLT entry. */
2379 int plt_initial_entry_size;
2380 };
2381
2382 /* Get the PPC ELF linker hash table from a link_info structure. */
2383
2384 #define ppc_elf_hash_table(p) \
2385 ((struct ppc_elf_link_hash_table *) (p)->hash)
2386
2387 /* Create an entry in a PPC ELF linker hash table. */
2388
2389 static struct bfd_hash_entry *
2390 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2391 struct bfd_hash_table *table,
2392 const char *string)
2393 {
2394 /* Allocate the structure if it has not already been allocated by a
2395 subclass. */
2396 if (entry == NULL)
2397 {
2398 entry = bfd_hash_allocate (table,
2399 sizeof (struct ppc_elf_link_hash_entry));
2400 if (entry == NULL)
2401 return entry;
2402 }
2403
2404 /* Call the allocation method of the superclass. */
2405 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2406 if (entry != NULL)
2407 {
2408 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2409 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2410 ppc_elf_hash_entry (entry)->tls_mask = 0;
2411 }
2412
2413 return entry;
2414 }
2415
2416 /* Create a PPC ELF linker hash table. */
2417
2418 static struct bfd_link_hash_table *
2419 ppc_elf_link_hash_table_create (bfd *abfd)
2420 {
2421 struct ppc_elf_link_hash_table *ret;
2422
2423 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2424 if (ret == NULL)
2425 return NULL;
2426
2427 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2428 ppc_elf_link_hash_newfunc))
2429 {
2430 free (ret);
2431 return NULL;
2432 }
2433
2434 ret->elf.init_plt_refcount.refcount = 0;
2435 ret->elf.init_plt_refcount.glist = NULL;
2436 ret->elf.init_plt_offset.offset = 0;
2437 ret->elf.init_plt_offset.glist = NULL;
2438
2439 ret->sdata[0].name = ".sdata";
2440 ret->sdata[0].sym_name = "_SDA_BASE_";
2441 ret->sdata[0].bss_name = ".sbss";
2442
2443 ret->sdata[1].name = ".sdata2";
2444 ret->sdata[1].sym_name = "_SDA2_BASE_";
2445 ret->sdata[1].bss_name = ".sbss2";
2446
2447 ret->plt_entry_size = 12;
2448 ret->plt_slot_size = 8;
2449 ret->plt_initial_entry_size = 72;
2450
2451 ret->is_vxworks = 0;
2452
2453 return &ret->elf.root;
2454 }
2455
2456 /* Create .got and the related sections. */
2457
2458 static bfd_boolean
2459 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2460 {
2461 struct ppc_elf_link_hash_table *htab;
2462 asection *s;
2463 flagword flags;
2464
2465 if (!_bfd_elf_create_got_section (abfd, info))
2466 return FALSE;
2467
2468 htab = ppc_elf_hash_table (info);
2469 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2470 if (s == NULL)
2471 abort ();
2472
2473 if (htab->is_vxworks)
2474 {
2475 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2476 if (!htab->sgotplt)
2477 abort ();
2478 }
2479 else
2480 {
2481 /* The powerpc .got has a blrl instruction in it. Mark it
2482 executable. */
2483 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2484 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2485 if (!bfd_set_section_flags (abfd, s, flags))
2486 return FALSE;
2487 }
2488
2489 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2490 | SEC_LINKER_CREATED | SEC_READONLY);
2491 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2492 if (!htab->relgot
2493 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2494 return FALSE;
2495
2496 return TRUE;
2497 }
2498
2499 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2500 to output sections (just like _bfd_elf_create_dynamic_sections has
2501 to create .dynbss and .rela.bss). */
2502
2503 static bfd_boolean
2504 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2505 {
2506 struct ppc_elf_link_hash_table *htab;
2507 asection *s;
2508 flagword flags;
2509
2510 htab = ppc_elf_hash_table (info);
2511
2512 if (htab->got == NULL
2513 && !ppc_elf_create_got (abfd, info))
2514 return FALSE;
2515
2516 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2517 return FALSE;
2518
2519 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2520 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2521
2522 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2523 htab->glink = s;
2524 if (s == NULL
2525 || !bfd_set_section_alignment (abfd, s, 4))
2526 return FALSE;
2527
2528 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2529 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2530 SEC_ALLOC | SEC_LINKER_CREATED);
2531 htab->dynsbss = s;
2532 if (s == NULL)
2533 return FALSE;
2534
2535 if (! info->shared)
2536 {
2537 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2538 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2539 htab->relsbss = s;
2540 if (s == NULL
2541 || ! bfd_set_section_alignment (abfd, s, 2))
2542 return FALSE;
2543 }
2544
2545 /* Create the section for VxWorks static plt relocations. */
2546 if (htab->is_vxworks && !info->shared)
2547 {
2548 s = bfd_make_section (abfd, ".rela.plt.unloaded");
2549 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
2550 | SEC_LINKER_CREATED);
2551 if (s == NULL
2552 || ! bfd_set_section_flags (abfd, s, flags)
2553 || ! bfd_set_section_alignment (abfd, s,
2554 get_elf_backend_data (abfd)->s->log_file_align))
2555 return FALSE;
2556 htab->srelplt2 = s;
2557 }
2558
2559 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2560 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2561 if (s == NULL)
2562 abort ();
2563
2564 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2565 return bfd_set_section_flags (abfd, s, flags);
2566 }
2567
2568 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2569
2570 static void
2571 ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
2572 struct elf_link_hash_entry *dir,
2573 struct elf_link_hash_entry *ind)
2574 {
2575 struct ppc_elf_link_hash_entry *edir, *eind;
2576
2577 edir = (struct ppc_elf_link_hash_entry *) dir;
2578 eind = (struct ppc_elf_link_hash_entry *) ind;
2579
2580 if (eind->dyn_relocs != NULL)
2581 {
2582 if (edir->dyn_relocs != NULL)
2583 {
2584 struct ppc_elf_dyn_relocs **pp;
2585 struct ppc_elf_dyn_relocs *p;
2586
2587 /* Add reloc counts against the indirect sym to the direct sym
2588 list. Merge any entries against the same section. */
2589 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2590 {
2591 struct ppc_elf_dyn_relocs *q;
2592
2593 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2594 if (q->sec == p->sec)
2595 {
2596 q->pc_count += p->pc_count;
2597 q->count += p->count;
2598 *pp = p->next;
2599 break;
2600 }
2601 if (q == NULL)
2602 pp = &p->next;
2603 }
2604 *pp = edir->dyn_relocs;
2605 }
2606
2607 edir->dyn_relocs = eind->dyn_relocs;
2608 eind->dyn_relocs = NULL;
2609 }
2610
2611 edir->tls_mask |= eind->tls_mask;
2612 edir->has_sda_refs |= eind->has_sda_refs;
2613
2614 /* If called to transfer flags for a weakdef during processing
2615 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2616 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2617 if (!(ELIMINATE_COPY_RELOCS
2618 && eind->elf.root.type != bfd_link_hash_indirect
2619 && edir->elf.dynamic_adjusted))
2620 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2621
2622 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2623 edir->elf.ref_regular |= eind->elf.ref_regular;
2624 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2625 edir->elf.needs_plt |= eind->elf.needs_plt;
2626
2627 /* If we were called to copy over info for a weak sym, that's all. */
2628 if (eind->elf.root.type != bfd_link_hash_indirect)
2629 return;
2630
2631 /* Copy over the GOT refcount entries that we may have already seen to
2632 the symbol which just became indirect. */
2633 edir->elf.got.refcount += eind->elf.got.refcount;
2634 eind->elf.got.refcount = 0;
2635
2636 /* And plt entries. */
2637 if (eind->elf.plt.plist != NULL)
2638 {
2639 if (edir->elf.plt.plist != NULL)
2640 {
2641 struct plt_entry **entp;
2642 struct plt_entry *ent;
2643
2644 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2645 {
2646 struct plt_entry *dent;
2647
2648 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2649 if (dent->sec == ent->sec && dent->addend == ent->addend)
2650 {
2651 dent->plt.refcount += ent->plt.refcount;
2652 *entp = ent->next;
2653 break;
2654 }
2655 if (dent == NULL)
2656 entp = &ent->next;
2657 }
2658 *entp = edir->elf.plt.plist;
2659 }
2660
2661 edir->elf.plt.plist = eind->elf.plt.plist;
2662 eind->elf.plt.plist = NULL;
2663 }
2664
2665 if (eind->elf.dynindx != -1)
2666 {
2667 if (edir->elf.dynindx != -1)
2668 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2669 edir->elf.dynstr_index);
2670 edir->elf.dynindx = eind->elf.dynindx;
2671 edir->elf.dynstr_index = eind->elf.dynstr_index;
2672 eind->elf.dynindx = -1;
2673 eind->elf.dynstr_index = 0;
2674 }
2675 }
2676
2677 /* Return 1 if target is one of ours. */
2678
2679 static bfd_boolean
2680 is_ppc_elf_target (const struct bfd_target *targ)
2681 {
2682 extern const bfd_target bfd_elf32_powerpc_vec;
2683 extern const bfd_target bfd_elf32_powerpcle_vec;
2684
2685 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2686 }
2687
2688 /* Hook called by the linker routine which adds symbols from an object
2689 file. We use it to put .comm items in .sbss, and not .bss. */
2690
2691 static bfd_boolean
2692 ppc_elf_add_symbol_hook (bfd *abfd,
2693 struct bfd_link_info *info,
2694 Elf_Internal_Sym *sym,
2695 const char **namep ATTRIBUTE_UNUSED,
2696 flagword *flagsp ATTRIBUTE_UNUSED,
2697 asection **secp,
2698 bfd_vma *valp)
2699 {
2700 if (sym->st_shndx == SHN_COMMON
2701 && !info->relocatable
2702 && sym->st_size <= elf_gp_size (abfd)
2703 && is_ppc_elf_target (info->hash->creator))
2704 {
2705 /* Common symbols less than or equal to -G nn bytes are automatically
2706 put into .sbss. */
2707 struct ppc_elf_link_hash_table *htab;
2708
2709 htab = ppc_elf_hash_table (info);
2710 if (htab->sbss == NULL)
2711 {
2712 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2713
2714 if (!htab->elf.dynobj)
2715 htab->elf.dynobj = abfd;
2716
2717 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2718 ".sbss",
2719 flags);
2720 if (htab->sbss == NULL)
2721 return FALSE;
2722 }
2723
2724 *secp = htab->sbss;
2725 *valp = sym->st_size;
2726 }
2727
2728 return TRUE;
2729 }
2730 \f
2731 static bfd_boolean
2732 create_sdata_sym (struct ppc_elf_link_hash_table *htab,
2733 elf_linker_section_t *lsect)
2734 {
2735 lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
2736 TRUE, FALSE, TRUE);
2737 if (lsect->sym == NULL)
2738 return FALSE;
2739 if (lsect->sym->root.type == bfd_link_hash_new)
2740 lsect->sym->non_elf = 0;
2741 lsect->sym->ref_regular = 1;
2742 return TRUE;
2743 }
2744
2745 /* Create a special linker section. */
2746
2747 static bfd_boolean
2748 ppc_elf_create_linker_section (bfd *abfd,
2749 struct bfd_link_info *info,
2750 flagword flags,
2751 elf_linker_section_t *lsect)
2752 {
2753 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2754 asection *s;
2755
2756 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2757 | SEC_LINKER_CREATED);
2758
2759 /* Record the first bfd that needs the special sections. */
2760 if (!htab->elf.dynobj)
2761 htab->elf.dynobj = abfd;
2762
2763 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2764 lsect->name,
2765 flags);
2766 if (s == NULL
2767 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2768 return FALSE;
2769 lsect->section = s;
2770
2771 return create_sdata_sym (htab, lsect);
2772 }
2773
2774 /* Find a linker generated pointer with a given addend and type. */
2775
2776 static elf_linker_section_pointers_t *
2777 elf_find_pointer_linker_section
2778 (elf_linker_section_pointers_t *linker_pointers,
2779 bfd_vma addend,
2780 elf_linker_section_t *lsect)
2781 {
2782 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2783 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2784 return linker_pointers;
2785
2786 return NULL;
2787 }
2788
2789 /* Allocate a pointer to live in a linker created section. */
2790
2791 static bfd_boolean
2792 elf_create_pointer_linker_section (bfd *abfd,
2793 elf_linker_section_t *lsect,
2794 struct elf_link_hash_entry *h,
2795 const Elf_Internal_Rela *rel)
2796 {
2797 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2798 elf_linker_section_pointers_t *linker_section_ptr;
2799 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2800 bfd_size_type amt;
2801
2802 BFD_ASSERT (lsect != NULL);
2803
2804 /* Is this a global symbol? */
2805 if (h != NULL)
2806 {
2807 struct ppc_elf_link_hash_entry *eh;
2808
2809 /* Has this symbol already been allocated? If so, our work is done. */
2810 eh = (struct ppc_elf_link_hash_entry *) h;
2811 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2812 rel->r_addend,
2813 lsect))
2814 return TRUE;
2815
2816 ptr_linker_section_ptr = &eh->linker_section_pointer;
2817 }
2818 else
2819 {
2820 /* Allocation of a pointer to a local symbol. */
2821 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2822
2823 /* Allocate a table to hold the local symbols if first time. */
2824 if (!ptr)
2825 {
2826 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2827
2828 amt = num_symbols;
2829 amt *= sizeof (elf_linker_section_pointers_t *);
2830 ptr = bfd_zalloc (abfd, amt);
2831
2832 if (!ptr)
2833 return FALSE;
2834
2835 elf_local_ptr_offsets (abfd) = ptr;
2836 }
2837
2838 /* Has this symbol already been allocated? If so, our work is done. */
2839 if (elf_find_pointer_linker_section (ptr[r_symndx],
2840 rel->r_addend,
2841 lsect))
2842 return TRUE;
2843
2844 ptr_linker_section_ptr = &ptr[r_symndx];
2845 }
2846
2847 /* Allocate space for a pointer in the linker section, and allocate
2848 a new pointer record from internal memory. */
2849 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2850 amt = sizeof (elf_linker_section_pointers_t);
2851 linker_section_ptr = bfd_alloc (abfd, amt);
2852
2853 if (!linker_section_ptr)
2854 return FALSE;
2855
2856 linker_section_ptr->next = *ptr_linker_section_ptr;
2857 linker_section_ptr->addend = rel->r_addend;
2858 linker_section_ptr->lsect = lsect;
2859 *ptr_linker_section_ptr = linker_section_ptr;
2860
2861 linker_section_ptr->offset = lsect->section->size;
2862 lsect->section->size += 4;
2863
2864 #ifdef DEBUG
2865 fprintf (stderr,
2866 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2867 lsect->name, (long) linker_section_ptr->offset,
2868 (long) lsect->section->size);
2869 #endif
2870
2871 return TRUE;
2872 }
2873
2874 static bfd_boolean
2875 update_local_sym_info (bfd *abfd,
2876 Elf_Internal_Shdr *symtab_hdr,
2877 unsigned long r_symndx,
2878 int tls_type)
2879 {
2880 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2881 char *local_got_tls_masks;
2882
2883 if (local_got_refcounts == NULL)
2884 {
2885 bfd_size_type size = symtab_hdr->sh_info;
2886
2887 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2888 local_got_refcounts = bfd_zalloc (abfd, size);
2889 if (local_got_refcounts == NULL)
2890 return FALSE;
2891 elf_local_got_refcounts (abfd) = local_got_refcounts;
2892 }
2893
2894 local_got_refcounts[r_symndx] += 1;
2895 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2896 local_got_tls_masks[r_symndx] |= tls_type;
2897 return TRUE;
2898 }
2899
2900 static bfd_boolean
2901 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2902 asection *sec, bfd_vma addend)
2903 {
2904 struct plt_entry *ent;
2905
2906 if (addend < 32768)
2907 sec = NULL;
2908 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2909 if (ent->sec == sec && ent->addend == addend)
2910 break;
2911 if (ent == NULL)
2912 {
2913 bfd_size_type amt = sizeof (*ent);
2914 ent = bfd_alloc (abfd, amt);
2915 if (ent == NULL)
2916 return FALSE;
2917 ent->next = h->plt.plist;
2918 ent->sec = sec;
2919 ent->addend = addend;
2920 ent->plt.refcount = 0;
2921 h->plt.plist = ent;
2922 }
2923 ent->plt.refcount += 1;
2924 return TRUE;
2925 }
2926
2927 static struct plt_entry *
2928 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2929 {
2930 struct plt_entry *ent;
2931
2932 if (addend < 32768)
2933 sec = NULL;
2934 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2935 if (ent->sec == sec && ent->addend == addend)
2936 break;
2937 return ent;
2938 }
2939
2940 static void
2941 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2942 {
2943 (*_bfd_error_handler)
2944 (_("%B: relocation %s cannot be used when making a shared object"),
2945 abfd,
2946 ppc_elf_howto_table[r_type]->name);
2947 bfd_set_error (bfd_error_bad_value);
2948 }
2949
2950 /* Look through the relocs for a section during the first phase, and
2951 allocate space in the global offset table or procedure linkage
2952 table. */
2953
2954 static bfd_boolean
2955 ppc_elf_check_relocs (bfd *abfd,
2956 struct bfd_link_info *info,
2957 asection *sec,
2958 const Elf_Internal_Rela *relocs)
2959 {
2960 struct ppc_elf_link_hash_table *htab;
2961 Elf_Internal_Shdr *symtab_hdr;
2962 struct elf_link_hash_entry **sym_hashes;
2963 const Elf_Internal_Rela *rel;
2964 const Elf_Internal_Rela *rel_end;
2965 asection *got2, *sreloc;
2966
2967 if (info->relocatable)
2968 return TRUE;
2969
2970 /* Don't do anything special with non-loaded, non-alloced sections.
2971 In particular, any relocs in such sections should not affect GOT
2972 and PLT reference counting (ie. we don't allow them to create GOT
2973 or PLT entries), there's no possibility or desire to optimize TLS
2974 relocs, and there's not much point in propagating relocs to shared
2975 libs that the dynamic linker won't relocate. */
2976 if ((sec->flags & SEC_ALLOC) == 0)
2977 return TRUE;
2978
2979 #ifdef DEBUG
2980 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2981 sec, abfd);
2982 #endif
2983
2984 /* Initialize howto table if not already done. */
2985 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2986 ppc_elf_howto_init ();
2987
2988 htab = ppc_elf_hash_table (info);
2989 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2990 sym_hashes = elf_sym_hashes (abfd);
2991 got2 = bfd_get_section_by_name (abfd, ".got2");
2992 sreloc = NULL;
2993
2994 rel_end = relocs + sec->reloc_count;
2995 for (rel = relocs; rel < rel_end; rel++)
2996 {
2997 unsigned long r_symndx;
2998 enum elf_ppc_reloc_type r_type;
2999 struct elf_link_hash_entry *h;
3000 int tls_type = 0;
3001
3002 r_symndx = ELF32_R_SYM (rel->r_info);
3003 if (r_symndx < symtab_hdr->sh_info)
3004 h = NULL;
3005 else
3006 {
3007 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3008 while (h->root.type == bfd_link_hash_indirect
3009 || h->root.type == bfd_link_hash_warning)
3010 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3011 }
3012
3013 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3014 This shows up in particular in an R_PPC_ADDR32 in the eabi
3015 startup code. */
3016 if (h != NULL
3017 && htab->got == NULL
3018 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3019 {
3020 if (htab->elf.dynobj == NULL)
3021 htab->elf.dynobj = abfd;
3022 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3023 return FALSE;
3024 BFD_ASSERT (h == htab->elf.hgot);
3025 }
3026
3027 r_type = ELF32_R_TYPE (rel->r_info);
3028 switch (r_type)
3029 {
3030 case R_PPC_GOT_TLSLD16:
3031 case R_PPC_GOT_TLSLD16_LO:
3032 case R_PPC_GOT_TLSLD16_HI:
3033 case R_PPC_GOT_TLSLD16_HA:
3034 htab->tlsld_got.refcount += 1;
3035 tls_type = TLS_TLS | TLS_LD;
3036 goto dogottls;
3037
3038 case R_PPC_GOT_TLSGD16:
3039 case R_PPC_GOT_TLSGD16_LO:
3040 case R_PPC_GOT_TLSGD16_HI:
3041 case R_PPC_GOT_TLSGD16_HA:
3042 tls_type = TLS_TLS | TLS_GD;
3043 goto dogottls;
3044
3045 case R_PPC_GOT_TPREL16:
3046 case R_PPC_GOT_TPREL16_LO:
3047 case R_PPC_GOT_TPREL16_HI:
3048 case R_PPC_GOT_TPREL16_HA:
3049 if (info->shared)
3050 info->flags |= DF_STATIC_TLS;
3051 tls_type = TLS_TLS | TLS_TPREL;
3052 goto dogottls;
3053
3054 case R_PPC_GOT_DTPREL16:
3055 case R_PPC_GOT_DTPREL16_LO:
3056 case R_PPC_GOT_DTPREL16_HI:
3057 case R_PPC_GOT_DTPREL16_HA:
3058 tls_type = TLS_TLS | TLS_DTPREL;
3059 dogottls:
3060 sec->has_tls_reloc = 1;
3061 /* Fall thru */
3062
3063 /* GOT16 relocations */
3064 case R_PPC_GOT16:
3065 case R_PPC_GOT16_LO:
3066 case R_PPC_GOT16_HI:
3067 case R_PPC_GOT16_HA:
3068 /* This symbol requires a global offset table entry. */
3069 if (htab->got == NULL)
3070 {
3071 if (htab->elf.dynobj == NULL)
3072 htab->elf.dynobj = abfd;
3073 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3074 return FALSE;
3075 }
3076 if (h != NULL)
3077 {
3078 h->got.refcount += 1;
3079 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3080 }
3081 else
3082 /* This is a global offset table entry for a local symbol. */
3083 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3084 return FALSE;
3085 break;
3086
3087 /* Indirect .sdata relocation. */
3088 case R_PPC_EMB_SDAI16:
3089 if (info->shared)
3090 {
3091 bad_shared_reloc (abfd, r_type);
3092 return FALSE;
3093 }
3094 if (htab->sdata[0].section == NULL
3095 && !ppc_elf_create_linker_section (abfd, info, 0,
3096 &htab->sdata[0]))
3097 return FALSE;
3098 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3099 h, rel))
3100 return FALSE;
3101 if (h != NULL)
3102 {
3103 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3104 h->non_got_ref = TRUE;
3105 }
3106 break;
3107
3108 /* Indirect .sdata2 relocation. */
3109 case R_PPC_EMB_SDA2I16:
3110 if (info->shared)
3111 {
3112 bad_shared_reloc (abfd, r_type);
3113 return FALSE;
3114 }
3115 if (htab->sdata[1].section == NULL
3116 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3117 &htab->sdata[1]))
3118 return FALSE;
3119 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3120 h, rel))
3121 return FALSE;
3122 if (h != NULL)
3123 {
3124 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3125 h->non_got_ref = TRUE;
3126 }
3127 break;
3128
3129 case R_PPC_SDAREL16:
3130 if (info->shared)
3131 {
3132 bad_shared_reloc (abfd, r_type);
3133 return FALSE;
3134 }
3135 if (htab->sdata[0].sym == NULL
3136 && !create_sdata_sym (htab, &htab->sdata[0]))
3137 return FALSE;
3138 if (h != NULL)
3139 {
3140 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3141 h->non_got_ref = TRUE;
3142 }
3143 break;
3144
3145 case R_PPC_EMB_SDA2REL:
3146 if (info->shared)
3147 {
3148 bad_shared_reloc (abfd, r_type);
3149 return FALSE;
3150 }
3151 if (htab->sdata[1].sym == NULL
3152 && !create_sdata_sym (htab, &htab->sdata[1]))
3153 return FALSE;
3154 if (h != NULL)
3155 {
3156 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3157 h->non_got_ref = TRUE;
3158 }
3159 break;
3160
3161 case R_PPC_EMB_SDA21:
3162 case R_PPC_EMB_RELSDA:
3163 if (info->shared)
3164 {
3165 bad_shared_reloc (abfd, r_type);
3166 return FALSE;
3167 }
3168 if (htab->sdata[0].sym == NULL
3169 && !create_sdata_sym (htab, &htab->sdata[0]))
3170 return FALSE;
3171 if (htab->sdata[1].sym == NULL
3172 && !create_sdata_sym (htab, &htab->sdata[1]))
3173 return FALSE;
3174 if (h != NULL)
3175 {
3176 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3177 h->non_got_ref = TRUE;
3178 }
3179 break;
3180
3181 case R_PPC_EMB_NADDR32:
3182 case R_PPC_EMB_NADDR16:
3183 case R_PPC_EMB_NADDR16_LO:
3184 case R_PPC_EMB_NADDR16_HI:
3185 case R_PPC_EMB_NADDR16_HA:
3186 if (info->shared)
3187 {
3188 bad_shared_reloc (abfd, r_type);
3189 return FALSE;
3190 }
3191 if (h != NULL)
3192 h->non_got_ref = TRUE;
3193 break;
3194
3195 case R_PPC_PLT32:
3196 case R_PPC_PLTREL24:
3197 case R_PPC_PLTREL32:
3198 case R_PPC_PLT16_LO:
3199 case R_PPC_PLT16_HI:
3200 case R_PPC_PLT16_HA:
3201 #ifdef DEBUG
3202 fprintf (stderr, "Reloc requires a PLT entry\n");
3203 #endif
3204 /* This symbol requires a procedure linkage table entry. We
3205 actually build the entry in finish_dynamic_symbol,
3206 because this might be a case of linking PIC code without
3207 linking in any dynamic objects, in which case we don't
3208 need to generate a procedure linkage table after all. */
3209
3210 if (h == NULL)
3211 {
3212 /* It does not make sense to have a procedure linkage
3213 table entry for a local symbol. */
3214 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3215 "local symbol"),
3216 abfd,
3217 sec,
3218 (long) rel->r_offset,
3219 ppc_elf_howto_table[r_type]->name);
3220 bfd_set_error (bfd_error_bad_value);
3221 return FALSE;
3222 }
3223 else
3224 {
3225 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3226
3227 h->needs_plt = 1;
3228 if (!update_plt_info (abfd, h, got2, addend))
3229 return FALSE;
3230 }
3231 break;
3232
3233 /* The following relocations don't need to propagate the
3234 relocation if linking a shared object since they are
3235 section relative. */
3236 case R_PPC_SECTOFF:
3237 case R_PPC_SECTOFF_LO:
3238 case R_PPC_SECTOFF_HI:
3239 case R_PPC_SECTOFF_HA:
3240 case R_PPC_DTPREL16:
3241 case R_PPC_DTPREL16_LO:
3242 case R_PPC_DTPREL16_HI:
3243 case R_PPC_DTPREL16_HA:
3244 case R_PPC_TOC16:
3245 break;
3246
3247 case R_PPC_REL16:
3248 case R_PPC_REL16_LO:
3249 case R_PPC_REL16_HI:
3250 case R_PPC_REL16_HA:
3251 htab->new_plt = 1;
3252 break;
3253
3254 /* These are just markers. */
3255 case R_PPC_TLS:
3256 case R_PPC_EMB_MRKREF:
3257 case R_PPC_NONE:
3258 case R_PPC_max:
3259 break;
3260
3261 /* These should only appear in dynamic objects. */
3262 case R_PPC_COPY:
3263 case R_PPC_GLOB_DAT:
3264 case R_PPC_JMP_SLOT:
3265 case R_PPC_RELATIVE:
3266 break;
3267
3268 /* These aren't handled yet. We'll report an error later. */
3269 case R_PPC_ADDR30:
3270 case R_PPC_EMB_RELSEC16:
3271 case R_PPC_EMB_RELST_LO:
3272 case R_PPC_EMB_RELST_HI:
3273 case R_PPC_EMB_RELST_HA:
3274 case R_PPC_EMB_BIT_FLD:
3275 break;
3276
3277 /* This refers only to functions defined in the shared library. */
3278 case R_PPC_LOCAL24PC:
3279 if (h && h == htab->elf.hgot)
3280 htab->old_plt = 1;
3281 break;
3282
3283 /* This relocation describes the C++ object vtable hierarchy.
3284 Reconstruct it for later use during GC. */
3285 case R_PPC_GNU_VTINHERIT:
3286 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3287 return FALSE;
3288 break;
3289
3290 /* This relocation describes which C++ vtable entries are actually
3291 used. Record for later use during GC. */
3292 case R_PPC_GNU_VTENTRY:
3293 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3294 return FALSE;
3295 break;
3296
3297 /* We shouldn't really be seeing these. */
3298 case R_PPC_TPREL32:
3299 if (info->shared)
3300 info->flags |= DF_STATIC_TLS;
3301 goto dodyn;
3302
3303 /* Nor these. */
3304 case R_PPC_DTPMOD32:
3305 case R_PPC_DTPREL32:
3306 goto dodyn;
3307
3308 case R_PPC_TPREL16:
3309 case R_PPC_TPREL16_LO:
3310 case R_PPC_TPREL16_HI:
3311 case R_PPC_TPREL16_HA:
3312 if (info->shared)
3313 info->flags |= DF_STATIC_TLS;
3314 goto dodyn;
3315
3316 case R_PPC_REL32:
3317 if (h == NULL
3318 && got2 != NULL
3319 && (sec->flags & SEC_CODE) != 0
3320 && (info->shared || info->pie)
3321 && !htab->old_plt)
3322 {
3323 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3324 the start of a function, which assembles to a REL32
3325 reference to .got2. If we detect one of these, then
3326 force the old PLT layout because the linker cannot
3327 reliably deduce the GOT pointer value needed for
3328 PLT call stubs. */
3329 asection *s;
3330
3331 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3332 r_symndx);
3333 if (s == got2)
3334 htab->old_plt = 1;
3335 }
3336 /* fall through */
3337
3338 case R_PPC_REL24:
3339 case R_PPC_REL14:
3340 case R_PPC_REL14_BRTAKEN:
3341 case R_PPC_REL14_BRNTAKEN:
3342 if (h == NULL)
3343 break;
3344 if (h == htab->elf.hgot)
3345 {
3346 htab->old_plt = 1;
3347 break;
3348 }
3349 /* fall through */
3350
3351 case R_PPC_ADDR32:
3352 case R_PPC_ADDR24:
3353 case R_PPC_ADDR16:
3354 case R_PPC_ADDR16_LO:
3355 case R_PPC_ADDR16_HI:
3356 case R_PPC_ADDR16_HA:
3357 case R_PPC_ADDR14:
3358 case R_PPC_ADDR14_BRTAKEN:
3359 case R_PPC_ADDR14_BRNTAKEN:
3360 case R_PPC_UADDR32:
3361 case R_PPC_UADDR16:
3362 if (h != NULL && !info->shared)
3363 {
3364 /* We may need a plt entry if the symbol turns out to be
3365 a function defined in a dynamic object. */
3366 if (!update_plt_info (abfd, h, NULL, 0))
3367 return FALSE;
3368
3369 /* We may need a copy reloc too. */
3370 h->non_got_ref = 1;
3371 }
3372
3373 dodyn:
3374 /* If we are creating a shared library, and this is a reloc
3375 against a global symbol, or a non PC relative reloc
3376 against a local symbol, then we need to copy the reloc
3377 into the shared library. However, if we are linking with
3378 -Bsymbolic, we do not need to copy a reloc against a
3379 global symbol which is defined in an object we are
3380 including in the link (i.e., DEF_REGULAR is set). At
3381 this point we have not seen all the input files, so it is
3382 possible that DEF_REGULAR is not set now but will be set
3383 later (it is never cleared). In case of a weak definition,
3384 DEF_REGULAR may be cleared later by a strong definition in
3385 a shared library. We account for that possibility below by
3386 storing information in the dyn_relocs field of the hash
3387 table entry. A similar situation occurs when creating
3388 shared libraries and symbol visibility changes render the
3389 symbol local.
3390
3391 If on the other hand, we are creating an executable, we
3392 may need to keep relocations for symbols satisfied by a
3393 dynamic library if we manage to avoid copy relocs for the
3394 symbol. */
3395 if ((info->shared
3396 && (MUST_BE_DYN_RELOC (r_type)
3397 || (h != NULL
3398 && (! info->symbolic
3399 || h->root.type == bfd_link_hash_defweak
3400 || !h->def_regular))))
3401 || (ELIMINATE_COPY_RELOCS
3402 && !info->shared
3403 && h != NULL
3404 && (h->root.type == bfd_link_hash_defweak
3405 || !h->def_regular)))
3406 {
3407 struct ppc_elf_dyn_relocs *p;
3408 struct ppc_elf_dyn_relocs **head;
3409
3410 #ifdef DEBUG
3411 fprintf (stderr,
3412 "ppc_elf_check_relocs needs to "
3413 "create relocation for %s\n",
3414 (h && h->root.root.string
3415 ? h->root.root.string : "<unknown>"));
3416 #endif
3417 if (sreloc == NULL)
3418 {
3419 const char *name;
3420
3421 name = (bfd_elf_string_from_elf_section
3422 (abfd,
3423 elf_elfheader (abfd)->e_shstrndx,
3424 elf_section_data (sec)->rel_hdr.sh_name));
3425 if (name == NULL)
3426 return FALSE;
3427
3428 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3429 && strcmp (bfd_get_section_name (abfd, sec),
3430 name + 5) == 0);
3431
3432 if (htab->elf.dynobj == NULL)
3433 htab->elf.dynobj = abfd;
3434 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3435 if (sreloc == NULL)
3436 {
3437 flagword flags;
3438
3439 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3440 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3441 | SEC_ALLOC | SEC_LOAD);
3442 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3443 name,
3444 flags);
3445 if (sreloc == NULL
3446 || ! bfd_set_section_alignment (htab->elf.dynobj,
3447 sreloc, 2))
3448 return FALSE;
3449 }
3450 elf_section_data (sec)->sreloc = sreloc;
3451 }
3452
3453 /* If this is a global symbol, we count the number of
3454 relocations we need for this symbol. */
3455 if (h != NULL)
3456 {
3457 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3458 }
3459 else
3460 {
3461 /* Track dynamic relocs needed for local syms too.
3462 We really need local syms available to do this
3463 easily. Oh well. */
3464
3465 asection *s;
3466 void *vpp;
3467
3468 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3469 sec, r_symndx);
3470 if (s == NULL)
3471 return FALSE;
3472
3473 vpp = &elf_section_data (s)->local_dynrel;
3474 head = (struct ppc_elf_dyn_relocs **) vpp;
3475 }
3476
3477 p = *head;
3478 if (p == NULL || p->sec != sec)
3479 {
3480 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3481 if (p == NULL)
3482 return FALSE;
3483 p->next = *head;
3484 *head = p;
3485 p->sec = sec;
3486 p->count = 0;
3487 p->pc_count = 0;
3488 }
3489
3490 p->count += 1;
3491 if (!MUST_BE_DYN_RELOC (r_type))
3492 p->pc_count += 1;
3493 }
3494
3495 break;
3496 }
3497 }
3498
3499 return TRUE;
3500 }
3501 \f
3502 /* Merge backend specific data from an object file to the output
3503 object file when linking. */
3504
3505 static bfd_boolean
3506 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3507 {
3508 flagword old_flags;
3509 flagword new_flags;
3510 bfd_boolean error;
3511
3512 if (!is_ppc_elf_target (ibfd->xvec)
3513 || !is_ppc_elf_target (obfd->xvec))
3514 return TRUE;
3515
3516 /* Check if we have the same endianess. */
3517 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3518 return FALSE;
3519
3520 new_flags = elf_elfheader (ibfd)->e_flags;
3521 old_flags = elf_elfheader (obfd)->e_flags;
3522 if (!elf_flags_init (obfd))
3523 {
3524 /* First call, no flags set. */
3525 elf_flags_init (obfd) = TRUE;
3526 elf_elfheader (obfd)->e_flags = new_flags;
3527 }
3528
3529 /* Compatible flags are ok. */
3530 else if (new_flags == old_flags)
3531 ;
3532
3533 /* Incompatible flags. */
3534 else
3535 {
3536 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3537 to be linked with either. */
3538 error = FALSE;
3539 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3540 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3541 {
3542 error = TRUE;
3543 (*_bfd_error_handler)
3544 (_("%B: compiled with -mrelocatable and linked with "
3545 "modules compiled normally"), ibfd);
3546 }
3547 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3548 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3549 {
3550 error = TRUE;
3551 (*_bfd_error_handler)
3552 (_("%B: compiled normally and linked with "
3553 "modules compiled with -mrelocatable"), ibfd);
3554 }
3555
3556 /* The output is -mrelocatable-lib iff both the input files are. */
3557 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3558 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3559
3560 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3561 but each input file is either -mrelocatable or -mrelocatable-lib. */
3562 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3563 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3564 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3565 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3566
3567 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3568 any module uses it. */
3569 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3570
3571 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3572 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3573
3574 /* Warn about any other mismatches. */
3575 if (new_flags != old_flags)
3576 {
3577 error = TRUE;
3578 (*_bfd_error_handler)
3579 (_("%B: uses different e_flags (0x%lx) fields "
3580 "than previous modules (0x%lx)"),
3581 ibfd, (long) new_flags, (long) old_flags);
3582 }
3583
3584 if (error)
3585 {
3586 bfd_set_error (bfd_error_bad_value);
3587 return FALSE;
3588 }
3589 }
3590
3591 return TRUE;
3592 }
3593 \f
3594 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3595 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3596 int
3597 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3598 struct bfd_link_info *info,
3599 int force_old_plt,
3600 int emit_stub_syms)
3601 {
3602 struct ppc_elf_link_hash_table *htab;
3603 flagword flags;
3604
3605 htab = ppc_elf_hash_table (info);
3606 if (force_old_plt || !htab->new_plt)
3607 htab->old_plt = 1;
3608
3609 htab->emit_stub_syms = emit_stub_syms;
3610
3611 if (htab->is_vxworks)
3612 {
3613 /* The VxWorks PLT is a loaded section with contents. */
3614 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
3615 | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3616
3617 if (htab->plt != NULL
3618 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3619 return -1;
3620 }
3621 else if (!htab->old_plt)
3622 {
3623 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3624 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3625
3626 /* The new PLT is a loaded section. */
3627 if (htab->plt != NULL
3628 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3629 return -1;
3630
3631 /* The new GOT is not executable. */
3632 if (htab->got != NULL
3633 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3634 return -1;
3635 }
3636 else
3637 {
3638 /* Stop an unused .glink section from affecting .text alignment. */
3639 if (htab->glink != NULL
3640 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3641 return -1;
3642 }
3643 return !htab->old_plt;
3644 }
3645 \f
3646 /* Return the section that should be marked against GC for a given
3647 relocation. */
3648
3649 static asection *
3650 ppc_elf_gc_mark_hook (asection *sec,
3651 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3652 Elf_Internal_Rela *rel,
3653 struct elf_link_hash_entry *h,
3654 Elf_Internal_Sym *sym)
3655 {
3656 if (h != NULL)
3657 {
3658 switch (ELF32_R_TYPE (rel->r_info))
3659 {
3660 case R_PPC_GNU_VTINHERIT:
3661 case R_PPC_GNU_VTENTRY:
3662 break;
3663
3664 default:
3665 switch (h->root.type)
3666 {
3667 case bfd_link_hash_defined:
3668 case bfd_link_hash_defweak:
3669 return h->root.u.def.section;
3670
3671 case bfd_link_hash_common:
3672 return h->root.u.c.p->section;
3673
3674 default:
3675 break;
3676 }
3677 }
3678 }
3679 else
3680 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3681
3682 return NULL;
3683 }
3684
3685 /* Update the got, plt and dynamic reloc reference counts for the
3686 section being removed. */
3687
3688 static bfd_boolean
3689 ppc_elf_gc_sweep_hook (bfd *abfd,
3690 struct bfd_link_info *info,
3691 asection *sec,
3692 const Elf_Internal_Rela *relocs)
3693 {
3694 struct ppc_elf_link_hash_table *htab;
3695 Elf_Internal_Shdr *symtab_hdr;
3696 struct elf_link_hash_entry **sym_hashes;
3697 bfd_signed_vma *local_got_refcounts;
3698 const Elf_Internal_Rela *rel, *relend;
3699 asection *got2;
3700
3701 if ((sec->flags & SEC_ALLOC) == 0)
3702 return TRUE;
3703
3704 elf_section_data (sec)->local_dynrel = NULL;
3705
3706 htab = ppc_elf_hash_table (info);
3707 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3708 sym_hashes = elf_sym_hashes (abfd);
3709 local_got_refcounts = elf_local_got_refcounts (abfd);
3710 got2 = bfd_get_section_by_name (abfd, ".got2");
3711
3712 relend = relocs + sec->reloc_count;
3713 for (rel = relocs; rel < relend; rel++)
3714 {
3715 unsigned long r_symndx;
3716 enum elf_ppc_reloc_type r_type;
3717 struct elf_link_hash_entry *h = NULL;
3718
3719 r_symndx = ELF32_R_SYM (rel->r_info);
3720 if (r_symndx >= symtab_hdr->sh_info)
3721 {
3722 struct ppc_elf_dyn_relocs **pp, *p;
3723 struct ppc_elf_link_hash_entry *eh;
3724
3725 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3726 while (h->root.type == bfd_link_hash_indirect
3727 || h->root.type == bfd_link_hash_warning)
3728 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3729 eh = (struct ppc_elf_link_hash_entry *) h;
3730
3731 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3732 if (p->sec == sec)
3733 {
3734 /* Everything must go for SEC. */
3735 *pp = p->next;
3736 break;
3737 }
3738 }
3739
3740 r_type = ELF32_R_TYPE (rel->r_info);
3741 switch (r_type)
3742 {
3743 case R_PPC_GOT_TLSLD16:
3744 case R_PPC_GOT_TLSLD16_LO:
3745 case R_PPC_GOT_TLSLD16_HI:
3746 case R_PPC_GOT_TLSLD16_HA:
3747 htab->tlsld_got.refcount -= 1;
3748 /* Fall thru */
3749
3750 case R_PPC_GOT_TLSGD16:
3751 case R_PPC_GOT_TLSGD16_LO:
3752 case R_PPC_GOT_TLSGD16_HI:
3753 case R_PPC_GOT_TLSGD16_HA:
3754 case R_PPC_GOT_TPREL16:
3755 case R_PPC_GOT_TPREL16_LO:
3756 case R_PPC_GOT_TPREL16_HI:
3757 case R_PPC_GOT_TPREL16_HA:
3758 case R_PPC_GOT_DTPREL16:
3759 case R_PPC_GOT_DTPREL16_LO:
3760 case R_PPC_GOT_DTPREL16_HI:
3761 case R_PPC_GOT_DTPREL16_HA:
3762 case R_PPC_GOT16:
3763 case R_PPC_GOT16_LO:
3764 case R_PPC_GOT16_HI:
3765 case R_PPC_GOT16_HA:
3766 if (h != NULL)
3767 {
3768 if (h->got.refcount > 0)
3769 h->got.refcount--;
3770 }
3771 else if (local_got_refcounts != NULL)
3772 {
3773 if (local_got_refcounts[r_symndx] > 0)
3774 local_got_refcounts[r_symndx]--;
3775 }
3776 break;
3777
3778 case R_PPC_REL24:
3779 case R_PPC_REL14:
3780 case R_PPC_REL14_BRTAKEN:
3781 case R_PPC_REL14_BRNTAKEN:
3782 case R_PPC_REL32:
3783 if (h == NULL || h == htab->elf.hgot)
3784 break;
3785 /* Fall thru */
3786
3787 case R_PPC_ADDR32:
3788 case R_PPC_ADDR24:
3789 case R_PPC_ADDR16:
3790 case R_PPC_ADDR16_LO:
3791 case R_PPC_ADDR16_HI:
3792 case R_PPC_ADDR16_HA:
3793 case R_PPC_ADDR14:
3794 case R_PPC_ADDR14_BRTAKEN:
3795 case R_PPC_ADDR14_BRNTAKEN:
3796 case R_PPC_UADDR32:
3797 case R_PPC_UADDR16:
3798 if (info->shared)
3799 break;
3800
3801 case R_PPC_PLT32:
3802 case R_PPC_PLTREL24:
3803 case R_PPC_PLTREL32:
3804 case R_PPC_PLT16_LO:
3805 case R_PPC_PLT16_HI:
3806 case R_PPC_PLT16_HA:
3807 if (h != NULL)
3808 {
3809 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3810 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3811 if (ent->plt.refcount > 0)
3812 ent->plt.refcount -= 1;
3813 }
3814 break;
3815
3816 default:
3817 break;
3818 }
3819 }
3820 return TRUE;
3821 }
3822 \f
3823 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3824
3825 asection *
3826 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3827 {
3828 struct ppc_elf_link_hash_table *htab;
3829
3830 htab = ppc_elf_hash_table (info);
3831 if (!htab->old_plt
3832 && htab->plt != NULL
3833 && htab->plt->output_section != NULL)
3834 {
3835 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3836 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3837 }
3838
3839 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3840 FALSE, FALSE, TRUE);
3841 return _bfd_elf_tls_setup (obfd, info);
3842 }
3843
3844 /* Run through all the TLS relocs looking for optimization
3845 opportunities. */
3846
3847 bfd_boolean
3848 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3849 struct bfd_link_info *info)
3850 {
3851 bfd *ibfd;
3852 asection *sec;
3853 struct ppc_elf_link_hash_table *htab;
3854
3855 if (info->relocatable || info->shared)
3856 return TRUE;
3857
3858 htab = ppc_elf_hash_table (info);
3859 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3860 {
3861 Elf_Internal_Sym *locsyms = NULL;
3862 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3863
3864 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3865 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3866 {
3867 Elf_Internal_Rela *relstart, *rel, *relend;
3868 int expecting_tls_get_addr;
3869
3870 /* Read the relocations. */
3871 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3872 info->keep_memory);
3873 if (relstart == NULL)
3874 return FALSE;
3875
3876 expecting_tls_get_addr = 0;
3877 relend = relstart + sec->reloc_count;
3878 for (rel = relstart; rel < relend; rel++)
3879 {
3880 enum elf_ppc_reloc_type r_type;
3881 unsigned long r_symndx;
3882 struct elf_link_hash_entry *h = NULL;
3883 char *tls_mask;
3884 char tls_set, tls_clear;
3885 bfd_boolean is_local;
3886
3887 r_symndx = ELF32_R_SYM (rel->r_info);
3888 if (r_symndx >= symtab_hdr->sh_info)
3889 {
3890 struct elf_link_hash_entry **sym_hashes;
3891
3892 sym_hashes = elf_sym_hashes (ibfd);
3893 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3894 while (h->root.type == bfd_link_hash_indirect
3895 || h->root.type == bfd_link_hash_warning)
3896 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3897 }
3898
3899 is_local = FALSE;
3900 if (h == NULL
3901 || !h->def_dynamic)
3902 is_local = TRUE;
3903
3904 r_type = ELF32_R_TYPE (rel->r_info);
3905 switch (r_type)
3906 {
3907 case R_PPC_GOT_TLSLD16:
3908 case R_PPC_GOT_TLSLD16_LO:
3909 case R_PPC_GOT_TLSLD16_HI:
3910 case R_PPC_GOT_TLSLD16_HA:
3911 /* These relocs should never be against a symbol
3912 defined in a shared lib. Leave them alone if
3913 that turns out to be the case. */
3914 expecting_tls_get_addr = 0;
3915 htab->tlsld_got.refcount -= 1;
3916 if (!is_local)
3917 continue;
3918
3919 /* LD -> LE */
3920 tls_set = 0;
3921 tls_clear = TLS_LD;
3922 expecting_tls_get_addr = 1;
3923 break;
3924
3925 case R_PPC_GOT_TLSGD16:
3926 case R_PPC_GOT_TLSGD16_LO:
3927 case R_PPC_GOT_TLSGD16_HI:
3928 case R_PPC_GOT_TLSGD16_HA:
3929 if (is_local)
3930 /* GD -> LE */
3931 tls_set = 0;
3932 else
3933 /* GD -> IE */
3934 tls_set = TLS_TLS | TLS_TPRELGD;
3935 tls_clear = TLS_GD;
3936 expecting_tls_get_addr = 1;
3937 break;
3938
3939 case R_PPC_GOT_TPREL16:
3940 case R_PPC_GOT_TPREL16_LO:
3941 case R_PPC_GOT_TPREL16_HI:
3942 case R_PPC_GOT_TPREL16_HA:
3943 expecting_tls_get_addr = 0;
3944 if (is_local)
3945 {
3946 /* IE -> LE */
3947 tls_set = 0;
3948 tls_clear = TLS_TPREL;
3949 break;
3950 }
3951 else
3952 continue;
3953
3954 case R_PPC_REL14:
3955 case R_PPC_REL14_BRTAKEN:
3956 case R_PPC_REL14_BRNTAKEN:
3957 case R_PPC_REL24:
3958 if (expecting_tls_get_addr
3959 && h != NULL
3960 && h == htab->tls_get_addr)
3961 {
3962 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3963 if (ent != NULL && ent->plt.refcount > 0)
3964 ent->plt.refcount -= 1;
3965 }
3966 expecting_tls_get_addr = 0;
3967 continue;
3968
3969 default:
3970 expecting_tls_get_addr = 0;
3971 continue;
3972 }
3973
3974 if (h != NULL)
3975 {
3976 if (tls_set == 0)
3977 {
3978 /* We managed to get rid of a got entry. */
3979 if (h->got.refcount > 0)
3980 h->got.refcount -= 1;
3981 }
3982 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3983 }
3984 else
3985 {
3986 Elf_Internal_Sym *sym;
3987 bfd_signed_vma *lgot_refs;
3988 char *lgot_masks;
3989
3990 if (locsyms == NULL)
3991 {
3992 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3993 if (locsyms == NULL)
3994 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3995 symtab_hdr->sh_info,
3996 0, NULL, NULL, NULL);
3997 if (locsyms == NULL)
3998 {
3999 if (elf_section_data (sec)->relocs != relstart)
4000 free (relstart);
4001 return FALSE;
4002 }
4003 }
4004 sym = locsyms + r_symndx;
4005 lgot_refs = elf_local_got_refcounts (ibfd);
4006 if (lgot_refs == NULL)
4007 abort ();
4008 if (tls_set == 0)
4009 {
4010 /* We managed to get rid of a got entry. */
4011 if (lgot_refs[r_symndx] > 0)
4012 lgot_refs[r_symndx] -= 1;
4013 }
4014 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
4015 tls_mask = &lgot_masks[r_symndx];
4016 }
4017
4018 *tls_mask |= tls_set;
4019 *tls_mask &= ~tls_clear;
4020 }
4021
4022 if (elf_section_data (sec)->relocs != relstart)
4023 free (relstart);
4024 }
4025
4026 if (locsyms != NULL
4027 && (symtab_hdr->contents != (unsigned char *) locsyms))
4028 {
4029 if (!info->keep_memory)
4030 free (locsyms);
4031 else
4032 symtab_hdr->contents = (unsigned char *) locsyms;
4033 }
4034 }
4035 return TRUE;
4036 }
4037 \f
4038 /* Adjust a symbol defined by a dynamic object and referenced by a
4039 regular object. The current definition is in some section of the
4040 dynamic object, but we're not including those sections. We have to
4041 change the definition to something the rest of the link can
4042 understand. */
4043
4044 static bfd_boolean
4045 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
4046 struct elf_link_hash_entry *h)
4047 {
4048 struct ppc_elf_link_hash_table *htab;
4049 asection *s;
4050 unsigned int power_of_two;
4051
4052 #ifdef DEBUG
4053 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
4054 h->root.root.string);
4055 #endif
4056
4057 /* Make sure we know what is going on here. */
4058 htab = ppc_elf_hash_table (info);
4059 BFD_ASSERT (htab->elf.dynobj != NULL
4060 && (h->needs_plt
4061 || h->u.weakdef != NULL
4062 || (h->def_dynamic
4063 && h->ref_regular
4064 && !h->def_regular)));
4065
4066 /* Deal with function syms. */
4067 if (h->type == STT_FUNC
4068 || h->needs_plt)
4069 {
4070 /* Clear procedure linkage table information for any symbol that
4071 won't need a .plt entry. */
4072 struct plt_entry *ent;
4073 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4074 if (ent->plt.refcount > 0)
4075 break;
4076 if (ent == NULL
4077 || SYMBOL_CALLS_LOCAL (info, h)
4078 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4079 && h->root.type == bfd_link_hash_undefweak))
4080 {
4081 /* A PLT entry is not required/allowed when:
4082
4083 1. We are not using ld.so; because then the PLT entry
4084 can't be set up, so we can't use one. In this case,
4085 ppc_elf_adjust_dynamic_symbol won't even be called.
4086
4087 2. GC has rendered the entry unused.
4088
4089 3. We know for certain that a call to this symbol
4090 will go to this object, or will remain undefined. */
4091 h->plt.plist = NULL;
4092 h->needs_plt = 0;
4093 }
4094 return TRUE;
4095 }
4096 else
4097 h->plt.plist = NULL;
4098
4099 /* If this is a weak symbol, and there is a real definition, the
4100 processor independent code will have arranged for us to see the
4101 real definition first, and we can just use the same value. */
4102 if (h->u.weakdef != NULL)
4103 {
4104 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4105 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4106 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4107 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4108 if (ELIMINATE_COPY_RELOCS)
4109 h->non_got_ref = h->u.weakdef->non_got_ref;
4110 return TRUE;
4111 }
4112
4113 /* This is a reference to a symbol defined by a dynamic object which
4114 is not a function. */
4115
4116 /* If we are creating a shared library, we must presume that the
4117 only references to the symbol are via the global offset table.
4118 For such cases we need not do anything here; the relocations will
4119 be handled correctly by relocate_section. */
4120 if (info->shared)
4121 return TRUE;
4122
4123 /* If there are no references to this symbol that do not use the
4124 GOT, we don't need to generate a copy reloc. */
4125 if (!h->non_got_ref)
4126 return TRUE;
4127
4128 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4129 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4130 do this if there are any small data relocations. */
4131 if (ELIMINATE_COPY_RELOCS
4132 && !ppc_elf_hash_entry (h)->has_sda_refs)
4133 {
4134 struct ppc_elf_dyn_relocs *p;
4135 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4136 {
4137 s = p->sec->output_section;
4138 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4139 break;
4140 }
4141
4142 if (p == NULL)
4143 {
4144 h->non_got_ref = 0;
4145 return TRUE;
4146 }
4147 }
4148
4149 if (h->size == 0)
4150 {
4151 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
4152 h->root.root.string);
4153 return TRUE;
4154 }
4155
4156 /* We must allocate the symbol in our .dynbss section, which will
4157 become part of the .bss section of the executable. There will be
4158 an entry for this symbol in the .dynsym section. The dynamic
4159 object will contain position independent code, so all references
4160 from the dynamic object to this symbol will go through the global
4161 offset table. The dynamic linker will use the .dynsym entry to
4162 determine the address it must put in the global offset table, so
4163 both the dynamic object and the regular object will refer to the
4164 same memory location for the variable.
4165
4166 Of course, if the symbol is referenced using SDAREL relocs, we
4167 must instead allocate it in .sbss. */
4168
4169 if (ppc_elf_hash_entry (h)->has_sda_refs)
4170 s = htab->dynsbss;
4171 else
4172 s = htab->dynbss;
4173 BFD_ASSERT (s != NULL);
4174
4175 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4176 copy the initial value out of the dynamic object and into the
4177 runtime process image. We need to remember the offset into the
4178 .rela.bss section we are going to use. */
4179 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4180 {
4181 asection *srel;
4182
4183 if (ppc_elf_hash_entry (h)->has_sda_refs)
4184 srel = htab->relsbss;
4185 else
4186 srel = htab->relbss;
4187 BFD_ASSERT (srel != NULL);
4188 srel->size += sizeof (Elf32_External_Rela);
4189 h->needs_copy = 1;
4190 }
4191
4192 /* We need to figure out the alignment required for this symbol. I
4193 have no idea how ELF linkers handle this. */
4194 power_of_two = bfd_log2 (h->size);
4195 if (power_of_two > 4)
4196 power_of_two = 4;
4197
4198 /* Apply the required alignment. */
4199 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4200 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4201 {
4202 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4203 return FALSE;
4204 }
4205
4206 /* Define the symbol as being at this point in the section. */
4207 h->root.u.def.section = s;
4208 h->root.u.def.value = s->size;
4209
4210 /* Increment the section size to make room for the symbol. */
4211 s->size += h->size;
4212
4213 return TRUE;
4214 }
4215 \f
4216 /* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
4217 xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
4218 specifying the addend on the plt relocation. For -fpic code, the sym
4219 is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
4220 xxxxxxxx.got2.plt_pic32.<callee>. */
4221
4222 static bfd_boolean
4223 add_stub_sym (struct plt_entry *ent,
4224 struct elf_link_hash_entry *h,
4225 struct bfd_link_info *info)
4226 {
4227 struct elf_link_hash_entry *sh;
4228 size_t len1, len2, len3;
4229 char *name;
4230 const char *stub;
4231 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
4232
4233 if (info->shared || info->pie)
4234 stub = ".plt_pic32.";
4235 else
4236 stub = ".plt_call32.";
4237
4238 len1 = strlen (h->root.root.string);
4239 len2 = strlen (stub);
4240 len3 = 0;
4241 if (ent->sec)
4242 len3 = strlen (ent->sec->name);
4243 name = bfd_malloc (len1 + len2 + len3 + 9);
4244 if (name == NULL)
4245 return FALSE;
4246 sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
4247 if (ent->sec)
4248 memcpy (name + 8, ent->sec->name, len3);
4249 memcpy (name + 8 + len3, stub, len2);
4250 memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
4251 sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
4252 if (sh == NULL)
4253 return FALSE;
4254 if (sh->root.type == bfd_link_hash_new)
4255 {
4256 sh->root.type = bfd_link_hash_defined;
4257 sh->root.u.def.section = htab->glink;
4258 sh->root.u.def.value = ent->glink_offset;
4259 sh->ref_regular = 1;
4260 sh->def_regular = 1;
4261 sh->ref_regular_nonweak = 1;
4262 sh->forced_local = 1;
4263 sh->non_elf = 0;
4264 }
4265 return TRUE;
4266 }
4267
4268 /* Allocate NEED contiguous space in .got, and return the offset.
4269 Handles allocation of the got header when crossing 32k. */
4270
4271 static bfd_vma
4272 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4273 {
4274 bfd_vma where;
4275 unsigned int max_before_header = 32768;
4276
4277 if (htab->old_plt)
4278 max_before_header = 32764;
4279
4280 if (htab->is_vxworks)
4281 {
4282 where = htab->got->size;
4283 htab->got->size += need;
4284 }
4285 else if (need <= htab->got_gap)
4286 {
4287 where = max_before_header - htab->got_gap;
4288 htab->got_gap -= need;
4289 }
4290 else
4291 {
4292 if (htab->got->size + need > max_before_header
4293 && htab->got->size <= max_before_header)
4294 {
4295 htab->got_gap = max_before_header - htab->got->size;
4296 htab->got->size = max_before_header + htab->got_header_size;
4297 }
4298 where = htab->got->size;
4299 htab->got->size += need;
4300 }
4301 return where;
4302 }
4303
4304 /* Allocate space in associated reloc sections for dynamic relocs. */
4305
4306 static bfd_boolean
4307 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4308 {
4309 struct bfd_link_info *info = inf;
4310 struct ppc_elf_link_hash_entry *eh;
4311 struct ppc_elf_link_hash_table *htab;
4312 struct ppc_elf_dyn_relocs *p;
4313
4314 if (h->root.type == bfd_link_hash_indirect)
4315 return TRUE;
4316
4317 if (h->root.type == bfd_link_hash_warning)
4318 /* When warning symbols are created, they **replace** the "real"
4319 entry in the hash table, thus we never get to see the real
4320 symbol in a hash traversal. So look at it now. */
4321 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4322
4323 htab = ppc_elf_hash_table (info);
4324 if (htab->elf.dynamic_sections_created)
4325 {
4326 struct plt_entry *ent;
4327 bfd_boolean doneone = FALSE;
4328 bfd_vma plt_offset = 0, glink_offset = 0;
4329
4330 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4331 if (ent->plt.refcount > 0)
4332 {
4333 /* Make sure this symbol is output as a dynamic symbol. */
4334 if (h->dynindx == -1
4335 && !h->forced_local)
4336 {
4337 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4338 return FALSE;
4339 }
4340
4341 if (info->shared
4342 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4343 {
4344 asection *s = htab->plt;
4345
4346 if (!(htab->old_plt || htab->is_vxworks))
4347 {
4348 if (!doneone)
4349 {
4350 plt_offset = s->size;
4351 s->size += 4;
4352 }
4353 ent->plt.offset = plt_offset;
4354
4355 s = htab->glink;
4356 if (!doneone || info->shared || info->pie)
4357 {
4358 glink_offset = s->size;
4359 s->size += GLINK_ENTRY_SIZE;
4360 }
4361 if (!doneone
4362 && !info->shared
4363 && !h->def_regular)
4364 {
4365 h->root.u.def.section = s;
4366 h->root.u.def.value = glink_offset;
4367 }
4368 ent->glink_offset = glink_offset;
4369
4370 if (htab->emit_stub_syms
4371 && !add_stub_sym (ent, h, info))
4372 return FALSE;
4373 }
4374 else
4375 {
4376 if (!doneone)
4377 {
4378 /* If this is the first .plt entry, make room
4379 for the special first entry. */
4380 if (s->size == 0)
4381 s->size += htab->plt_initial_entry_size;
4382
4383 /* The PowerPC PLT is actually composed of two
4384 parts, the first part is 2 words (for a load
4385 and a jump), and then there is a remaining
4386 word available at the end. */
4387 plt_offset = (htab->plt_initial_entry_size
4388 + (htab->plt_slot_size
4389 * ((s->size
4390 - htab->plt_initial_entry_size)
4391 / htab->plt_entry_size)));
4392
4393 /* If this symbol is not defined in a regular
4394 file, and we are not generating a shared
4395 library, then set the symbol to this location
4396 in the .plt. This is required to make
4397 function pointers compare as equal between
4398 the normal executable and the shared library. */
4399 if (! info->shared
4400 && !h->def_regular)
4401 {
4402 h->root.u.def.section = s;
4403 h->root.u.def.value = plt_offset;
4404 }
4405
4406 /* Make room for this entry. */
4407 s->size += htab->plt_entry_size;
4408 /* After the 8192nd entry, room for two entries
4409 is allocated. */
4410 if (!htab->is_vxworks
4411 && (s->size - htab->plt_initial_entry_size)
4412 / htab->plt_entry_size
4413 > PLT_NUM_SINGLE_ENTRIES)
4414 s->size += htab->plt_entry_size;
4415 }
4416 ent->plt.offset = plt_offset;
4417 }
4418
4419 /* We also need to make an entry in the .rela.plt section. */
4420 if (!doneone)
4421 {
4422 htab->relplt->size += sizeof (Elf32_External_Rela);
4423
4424 if (htab->is_vxworks)
4425 {
4426 /* Allocate space for the unloaded relocations. */
4427 if (!info->shared)
4428 {
4429 if (ent->plt.offset
4430 == (bfd_vma) htab->plt_initial_entry_size)
4431 {
4432 htab->srelplt2->size
4433 += sizeof (Elf32_External_Rela)
4434 * VXWORKS_PLTRESOLVE_RELOCS;
4435 }
4436
4437 htab->srelplt2->size
4438 += sizeof (Elf32_External_Rela)
4439 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4440 }
4441
4442 /* Every PLT entry has an associated GOT entry in
4443 .got.plt. */
4444 htab->sgotplt->size += 4;
4445 }
4446 doneone = TRUE;
4447 }
4448 }
4449 else
4450 ent->plt.offset = (bfd_vma) -1;
4451
4452 if (!doneone)
4453 {
4454 h->plt.plist = NULL;
4455 h->needs_plt = 0;
4456 }
4457 }
4458 }
4459 else
4460 {
4461 h->plt.plist = NULL;
4462 h->needs_plt = 0;
4463 }
4464
4465 eh = (struct ppc_elf_link_hash_entry *) h;
4466 if (eh->elf.got.refcount > 0)
4467 {
4468 /* Make sure this symbol is output as a dynamic symbol. */
4469 if (eh->elf.dynindx == -1
4470 && !eh->elf.forced_local)
4471 {
4472 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4473 return FALSE;
4474 }
4475
4476 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4477 && !eh->elf.def_dynamic)
4478 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4479 eh->elf.got.offset = (bfd_vma) -1;
4480 else
4481 {
4482 bfd_boolean dyn;
4483 unsigned int need = 0;
4484 if ((eh->tls_mask & TLS_TLS) != 0)
4485 {
4486 if ((eh->tls_mask & TLS_LD) != 0)
4487 need += 8;
4488 if ((eh->tls_mask & TLS_GD) != 0)
4489 need += 8;
4490 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4491 need += 4;
4492 if ((eh->tls_mask & TLS_DTPREL) != 0)
4493 need += 4;
4494 }
4495 else
4496 need += 4;
4497 eh->elf.got.offset = allocate_got (htab, need);
4498 dyn = htab->elf.dynamic_sections_created;
4499 if ((info->shared
4500 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4501 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4502 || eh->elf.root.type != bfd_link_hash_undefweak))
4503 {
4504 /* All the entries we allocated need relocs.
4505 Except LD only needs one. */
4506 if ((eh->tls_mask & TLS_LD) != 0)
4507 need -= 4;
4508 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4509 }
4510 }
4511 }
4512 else
4513 eh->elf.got.offset = (bfd_vma) -1;
4514
4515 if (eh->dyn_relocs == NULL)
4516 return TRUE;
4517
4518 /* In the shared -Bsymbolic case, discard space allocated for
4519 dynamic pc-relative relocs against symbols which turn out to be
4520 defined in regular objects. For the normal shared case, discard
4521 space for relocs that have become local due to symbol visibility
4522 changes. */
4523
4524 if (info->shared)
4525 {
4526 /* Relocs that use pc_count are those that appear on a call insn,
4527 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4528 generated via assembly. We want calls to protected symbols to
4529 resolve directly to the function rather than going via the plt.
4530 If people want function pointer comparisons to work as expected
4531 then they should avoid writing weird assembly. */
4532 if (SYMBOL_CALLS_LOCAL (info, h))
4533 {
4534 struct ppc_elf_dyn_relocs **pp;
4535
4536 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4537 {
4538 p->count -= p->pc_count;
4539 p->pc_count = 0;
4540 if (p->count == 0)
4541 *pp = p->next;
4542 else
4543 pp = &p->next;
4544 }
4545 }
4546
4547 /* Also discard relocs on undefined weak syms with non-default
4548 visibility. */
4549 if (eh->dyn_relocs != NULL
4550 && h->root.type == bfd_link_hash_undefweak)
4551 {
4552 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4553 eh->dyn_relocs = NULL;
4554
4555 /* Make sure undefined weak symbols are output as a dynamic
4556 symbol in PIEs. */
4557 else if (h->dynindx == -1
4558 && !h->forced_local)
4559 {
4560 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4561 return FALSE;
4562 }
4563 }
4564 }
4565 else if (ELIMINATE_COPY_RELOCS)
4566 {
4567 /* For the non-shared case, discard space for relocs against
4568 symbols which turn out to need copy relocs or are not
4569 dynamic. */
4570
4571 if (!h->non_got_ref
4572 && h->def_dynamic
4573 && !h->def_regular)
4574 {
4575 /* Make sure this symbol is output as a dynamic symbol.
4576 Undefined weak syms won't yet be marked as dynamic. */
4577 if (h->dynindx == -1
4578 && !h->forced_local)
4579 {
4580 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4581 return FALSE;
4582 }
4583
4584 /* If that succeeded, we know we'll be keeping all the
4585 relocs. */
4586 if (h->dynindx != -1)
4587 goto keep;
4588 }
4589
4590 eh->dyn_relocs = NULL;
4591
4592 keep: ;
4593 }
4594
4595 /* Finally, allocate space. */
4596 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4597 {
4598 asection *sreloc = elf_section_data (p->sec)->sreloc;
4599 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4600 }
4601
4602 return TRUE;
4603 }
4604
4605 /* Find any dynamic relocs that apply to read-only sections. */
4606
4607 static bfd_boolean
4608 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4609 {
4610 struct ppc_elf_dyn_relocs *p;
4611
4612 if (h->root.type == bfd_link_hash_indirect)
4613 return TRUE;
4614
4615 if (h->root.type == bfd_link_hash_warning)
4616 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4617
4618 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4619 {
4620 asection *s = p->sec->output_section;
4621
4622 if (s != NULL
4623 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4624 == (SEC_READONLY | SEC_ALLOC)))
4625 {
4626 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4627
4628 /* Not an error, just cut short the traversal. */
4629 return FALSE;
4630 }
4631 }
4632 return TRUE;
4633 }
4634
4635 /* Set the sizes of the dynamic sections. */
4636
4637 static bfd_boolean
4638 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4639 struct bfd_link_info *info)
4640 {
4641 struct ppc_elf_link_hash_table *htab;
4642 asection *s;
4643 bfd_boolean relocs;
4644 bfd *ibfd;
4645
4646 #ifdef DEBUG
4647 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4648 #endif
4649
4650 htab = ppc_elf_hash_table (info);
4651 BFD_ASSERT (htab->elf.dynobj != NULL);
4652
4653 if (elf_hash_table (info)->dynamic_sections_created)
4654 {
4655 /* Set the contents of the .interp section to the interpreter. */
4656 if (info->executable)
4657 {
4658 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4659 BFD_ASSERT (s != NULL);
4660 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4661 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4662 }
4663 }
4664
4665 if (htab->old_plt)
4666 htab->got_header_size = 16;
4667 else
4668 htab->got_header_size = 12;
4669
4670 /* Set up .got offsets for local syms, and space for local dynamic
4671 relocs. */
4672 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4673 {
4674 bfd_signed_vma *local_got;
4675 bfd_signed_vma *end_local_got;
4676 char *lgot_masks;
4677 bfd_size_type locsymcount;
4678 Elf_Internal_Shdr *symtab_hdr;
4679
4680 if (!is_ppc_elf_target (ibfd->xvec))
4681 continue;
4682
4683 for (s = ibfd->sections; s != NULL; s = s->next)
4684 {
4685 struct ppc_elf_dyn_relocs *p;
4686
4687 for (p = ((struct ppc_elf_dyn_relocs *)
4688 elf_section_data (s)->local_dynrel);
4689 p != NULL;
4690 p = p->next)
4691 {
4692 if (!bfd_is_abs_section (p->sec)
4693 && bfd_is_abs_section (p->sec->output_section))
4694 {
4695 /* Input section has been discarded, either because
4696 it is a copy of a linkonce section or due to
4697 linker script /DISCARD/, so we'll be discarding
4698 the relocs too. */
4699 }
4700 else if (p->count != 0)
4701 {
4702 elf_section_data (p->sec)->sreloc->size
4703 += p->count * sizeof (Elf32_External_Rela);
4704 if ((p->sec->output_section->flags
4705 & (SEC_READONLY | SEC_ALLOC))
4706 == (SEC_READONLY | SEC_ALLOC))
4707 info->flags |= DF_TEXTREL;
4708 }
4709 }
4710 }
4711
4712 local_got = elf_local_got_refcounts (ibfd);
4713 if (!local_got)
4714 continue;
4715
4716 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4717 locsymcount = symtab_hdr->sh_info;
4718 end_local_got = local_got + locsymcount;
4719 lgot_masks = (char *) end_local_got;
4720 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4721 if (*local_got > 0)
4722 {
4723 if (*lgot_masks == (TLS_TLS | TLS_LD))
4724 {
4725 /* If just an LD reloc, we'll just use
4726 htab->tlsld_got.offset. */
4727 htab->tlsld_got.refcount += 1;
4728 *local_got = (bfd_vma) -1;
4729 }
4730 else
4731 {
4732 unsigned int need = 0;
4733 if ((*lgot_masks & TLS_TLS) != 0)
4734 {
4735 if ((*lgot_masks & TLS_GD) != 0)
4736 need += 8;
4737 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4738 need += 4;
4739 if ((*lgot_masks & TLS_DTPREL) != 0)
4740 need += 4;
4741 }
4742 else
4743 need += 4;
4744 *local_got = allocate_got (htab, need);
4745 if (info->shared)
4746 htab->relgot->size += (need
4747 * (sizeof (Elf32_External_Rela) / 4));
4748 }
4749 }
4750 else
4751 *local_got = (bfd_vma) -1;
4752 }
4753
4754 if (htab->tlsld_got.refcount > 0)
4755 {
4756 htab->tlsld_got.offset = allocate_got (htab, 8);
4757 if (info->shared)
4758 htab->relgot->size += sizeof (Elf32_External_Rela);
4759 }
4760 else
4761 htab->tlsld_got.offset = (bfd_vma) -1;
4762
4763 if (htab->is_vxworks)
4764 {
4765 /* Save the PLT symbol in the hash table for easy access.
4766 Mark GOT and PLT syms as having relocations; they might not,
4767 but we won't know for sure until we build the GOT in
4768 finish_dynamic_symbol. */
4769
4770 if (htab->elf.hgot)
4771 htab->elf.hgot->indx = -2;
4772 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
4773 "_PROCEDURE_LINKAGE_TABLE_",
4774 FALSE, FALSE, FALSE);
4775 if (htab->hplt)
4776 htab->hplt->indx = -2;
4777 /* If the PLT is executable then give the symbol function type. */
4778 if (htab->hplt && htab->plt->flags & SEC_CODE)
4779 htab->hplt->type = STT_FUNC;
4780 }
4781
4782 /* Allocate space for global sym dynamic relocs. */
4783 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4784
4785 if (htab->got != NULL && !htab->is_vxworks)
4786 {
4787 unsigned int g_o_t = 32768;
4788
4789 /* If we haven't allocated the header, do so now. When we get here,
4790 for old plt/got the got size will be 0 to 32764 (not allocated),
4791 or 32780 to 65536 (header allocated). For new plt/got, the
4792 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4793 if (htab->got->size <= 32768)
4794 {
4795 g_o_t = htab->got->size;
4796 if (htab->old_plt)
4797 g_o_t += 4;
4798 htab->got->size += htab->got_header_size;
4799 }
4800
4801 htab->elf.hgot->root.u.def.value = g_o_t;
4802 }
4803
4804 if (htab->glink != NULL && htab->glink->size != 0)
4805 {
4806 htab->glink_pltresolve = htab->glink->size;
4807 /* Space for the branch table. */
4808 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4809 /* Pad out to align the start of PLTresolve. */
4810 htab->glink->size += -htab->glink->size & 15;
4811 htab->glink->size += GLINK_PLTRESOLVE;
4812
4813 if (htab->emit_stub_syms)
4814 {
4815 struct elf_link_hash_entry *sh;
4816 sh = elf_link_hash_lookup (&htab->elf, "__glink",
4817 TRUE, FALSE, FALSE);
4818 if (sh == NULL)
4819 return FALSE;
4820 if (sh->root.type == bfd_link_hash_new)
4821 {
4822 sh->root.type = bfd_link_hash_defined;
4823 sh->root.u.def.section = htab->glink;
4824 sh->root.u.def.value = htab->glink_pltresolve;
4825 sh->ref_regular = 1;
4826 sh->def_regular = 1;
4827 sh->ref_regular_nonweak = 1;
4828 sh->forced_local = 1;
4829 sh->non_elf = 0;
4830 }
4831 sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
4832 TRUE, FALSE, FALSE);
4833 if (sh == NULL)
4834 return FALSE;
4835 if (sh->root.type == bfd_link_hash_new)
4836 {
4837 sh->root.type = bfd_link_hash_defined;
4838 sh->root.u.def.section = htab->glink;
4839 sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
4840 sh->ref_regular = 1;
4841 sh->def_regular = 1;
4842 sh->ref_regular_nonweak = 1;
4843 sh->forced_local = 1;
4844 sh->non_elf = 0;
4845 }
4846 }
4847 }
4848
4849 /* We've now determined the sizes of the various dynamic sections.
4850 Allocate memory for them. */
4851 relocs = FALSE;
4852 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4853 {
4854 bfd_boolean strip_section = TRUE;
4855
4856 if ((s->flags & SEC_LINKER_CREATED) == 0)
4857 continue;
4858
4859 if (s == htab->plt
4860 || s == htab->glink
4861 || s == htab->got
4862 || s == htab->sgotplt
4863 || s == htab->sbss
4864 || s == htab->dynbss
4865 || s == htab->dynsbss)
4866 {
4867 /* We'd like to strip these sections if they aren't needed, but if
4868 we've exported dynamic symbols from them we must leave them.
4869 It's too late to tell BFD to get rid of the symbols. */
4870 if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
4871 strip_section = FALSE;
4872 /* Strip this section if we don't need it; see the
4873 comment below. */
4874 }
4875 else if (s == htab->sdata[0].section
4876 || s == htab->sdata[1].section)
4877 {
4878 /* Strip these too. */
4879 }
4880 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4881 {
4882 if (s->size != 0)
4883 {
4884 /* Remember whether there are any relocation sections. */
4885 relocs = TRUE;
4886
4887 /* We use the reloc_count field as a counter if we need
4888 to copy relocs into the output file. */
4889 s->reloc_count = 0;
4890 }
4891 }
4892 else
4893 {
4894 /* It's not one of our sections, so don't allocate space. */
4895 continue;
4896 }
4897
4898 if (s->size == 0 && strip_section)
4899 {
4900 /* If we don't need this section, strip it from the
4901 output file. This is mostly to handle .rela.bss and
4902 .rela.plt. We must create both sections in
4903 create_dynamic_sections, because they must be created
4904 before the linker maps input sections to output
4905 sections. The linker does that before
4906 adjust_dynamic_symbol is called, and it is that
4907 function which decides whether anything needs to go
4908 into these sections. */
4909 s->flags |= SEC_EXCLUDE;
4910 continue;
4911 }
4912
4913 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4914 continue;
4915
4916 /* Allocate memory for the section contents. */
4917 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4918 if (s->contents == NULL)
4919 return FALSE;
4920 }
4921
4922 if (htab->elf.dynamic_sections_created)
4923 {
4924 /* Add some entries to the .dynamic section. We fill in the
4925 values later, in ppc_elf_finish_dynamic_sections, but we
4926 must add the entries now so that we get the correct size for
4927 the .dynamic section. The DT_DEBUG entry is filled in by the
4928 dynamic linker and used by the debugger. */
4929 #define add_dynamic_entry(TAG, VAL) \
4930 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4931
4932 if (info->executable)
4933 {
4934 if (!add_dynamic_entry (DT_DEBUG, 0))
4935 return FALSE;
4936 }
4937
4938 if (htab->plt != NULL && htab->plt->size != 0)
4939 {
4940 if (!add_dynamic_entry (DT_PLTGOT, 0)
4941 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4942 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4943 || !add_dynamic_entry (DT_JMPREL, 0))
4944 return FALSE;
4945 }
4946
4947 if (htab->glink != NULL && htab->glink->size != 0)
4948 {
4949 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4950 return FALSE;
4951 }
4952
4953 if (relocs)
4954 {
4955 if (!add_dynamic_entry (DT_RELA, 0)
4956 || !add_dynamic_entry (DT_RELASZ, 0)
4957 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4958 return FALSE;
4959 }
4960
4961 /* If any dynamic relocs apply to a read-only section, then we
4962 need a DT_TEXTREL entry. */
4963 if ((info->flags & DF_TEXTREL) == 0)
4964 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4965 info);
4966
4967 if ((info->flags & DF_TEXTREL) != 0)
4968 {
4969 if (!add_dynamic_entry (DT_TEXTREL, 0))
4970 return FALSE;
4971 }
4972 }
4973 #undef add_dynamic_entry
4974
4975 return TRUE;
4976 }
4977 \f
4978 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4979
4980 static const int shared_stub_entry[] =
4981 {
4982 0x7c0802a6, /* mflr 0 */
4983 0x429f0005, /* bcl 20, 31, .Lxxx */
4984 0x7d6802a6, /* mflr 11 */
4985 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4986 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4987 0x7c0803a6, /* mtlr 0 */
4988 0x7d6903a6, /* mtctr 11 */
4989 0x4e800420, /* bctr */
4990 };
4991
4992 static const int stub_entry[] =
4993 {
4994 0x3d600000, /* lis 11,xxx@ha */
4995 0x396b0000, /* addi 11,11,xxx@l */
4996 0x7d6903a6, /* mtctr 11 */
4997 0x4e800420, /* bctr */
4998 };
4999
5000 static bfd_boolean
5001 ppc_elf_relax_section (bfd *abfd,
5002 asection *isec,
5003 struct bfd_link_info *link_info,
5004 bfd_boolean *again)
5005 {
5006 struct one_fixup
5007 {
5008 struct one_fixup *next;
5009 asection *tsec;
5010 bfd_vma toff;
5011 bfd_vma trampoff;
5012 };
5013
5014 Elf_Internal_Shdr *symtab_hdr;
5015 bfd_byte *contents = NULL;
5016 Elf_Internal_Sym *isymbuf = NULL;
5017 Elf_Internal_Rela *internal_relocs = NULL;
5018 Elf_Internal_Rela *irel, *irelend;
5019 struct one_fixup *fixups = NULL;
5020 bfd_boolean changed;
5021 struct ppc_elf_link_hash_table *htab;
5022 bfd_size_type trampoff;
5023 asection *got2;
5024
5025 *again = FALSE;
5026
5027 /* Nothing to do if there are no relocations, and no need to do
5028 anything with non-alloc sections. */
5029 if ((isec->flags & SEC_ALLOC) == 0
5030 || (isec->flags & SEC_RELOC) == 0
5031 || isec->reloc_count == 0)
5032 return TRUE;
5033
5034 trampoff = (isec->size + 3) & (bfd_vma) -4;
5035 /* Space for a branch around any trampolines. */
5036 trampoff += 4;
5037
5038 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5039
5040 /* Get a copy of the native relocations. */
5041 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
5042 link_info->keep_memory);
5043 if (internal_relocs == NULL)
5044 goto error_return;
5045
5046 htab = ppc_elf_hash_table (link_info);
5047 got2 = bfd_get_section_by_name (abfd, ".got2");
5048
5049 irelend = internal_relocs + isec->reloc_count;
5050 for (irel = internal_relocs; irel < irelend; irel++)
5051 {
5052 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
5053 bfd_vma symaddr, reladdr, toff, roff;
5054 asection *tsec;
5055 struct one_fixup *f;
5056 size_t insn_offset = 0;
5057 bfd_vma max_branch_offset, val;
5058 bfd_byte *hit_addr;
5059 unsigned long t0;
5060 unsigned char sym_type;
5061
5062 switch (r_type)
5063 {
5064 case R_PPC_REL24:
5065 case R_PPC_LOCAL24PC:
5066 case R_PPC_PLTREL24:
5067 max_branch_offset = 1 << 25;
5068 break;
5069
5070 case R_PPC_REL14:
5071 case R_PPC_REL14_BRTAKEN:
5072 case R_PPC_REL14_BRNTAKEN:
5073 max_branch_offset = 1 << 15;
5074 break;
5075
5076 default:
5077 continue;
5078 }
5079
5080 /* Get the value of the symbol referred to by the reloc. */
5081 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5082 {
5083 /* A local symbol. */
5084 Elf_Internal_Sym *isym;
5085
5086 /* Read this BFD's local symbols. */
5087 if (isymbuf == NULL)
5088 {
5089 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5090 if (isymbuf == NULL)
5091 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5092 symtab_hdr->sh_info, 0,
5093 NULL, NULL, NULL);
5094 if (isymbuf == 0)
5095 goto error_return;
5096 }
5097 isym = isymbuf + ELF32_R_SYM (irel->r_info);
5098 if (isym->st_shndx == SHN_UNDEF)
5099 continue; /* We can't do anything with undefined symbols. */
5100 else if (isym->st_shndx == SHN_ABS)
5101 tsec = bfd_abs_section_ptr;
5102 else if (isym->st_shndx == SHN_COMMON)
5103 tsec = bfd_com_section_ptr;
5104 else
5105 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5106
5107 toff = isym->st_value;
5108 sym_type = ELF_ST_TYPE (isym->st_info);
5109 }
5110 else
5111 {
5112 /* Global symbol handling. */
5113 unsigned long indx;
5114 struct elf_link_hash_entry *h;
5115
5116 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5117 h = elf_sym_hashes (abfd)[indx];
5118
5119 while (h->root.type == bfd_link_hash_indirect
5120 || h->root.type == bfd_link_hash_warning)
5121 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5122
5123 tsec = NULL;
5124 toff = 0;
5125 if (r_type == R_PPC_PLTREL24
5126 && htab->plt != NULL)
5127 {
5128 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
5129
5130 if (ent != NULL)
5131 {
5132 if (!htab->old_plt)
5133 {
5134 tsec = htab->glink;
5135 toff = ent->glink_offset;
5136 }
5137 else
5138 {
5139 tsec = htab->plt;
5140 toff = ent->plt.offset;
5141 }
5142 }
5143 }
5144 if (tsec != NULL)
5145 ;
5146 else if (h->root.type == bfd_link_hash_defined
5147 || h->root.type == bfd_link_hash_defweak)
5148 {
5149 tsec = h->root.u.def.section;
5150 toff = h->root.u.def.value;
5151 }
5152 else
5153 continue;
5154
5155 sym_type = h->type;
5156 }
5157
5158 /* If the branch and target are in the same section, you have
5159 no hope of adding stubs. We'll error out later should the
5160 branch overflow. */
5161 if (tsec == isec)
5162 continue;
5163
5164 /* There probably isn't any reason to handle symbols in
5165 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5166 attribute for a code section, and we are only looking at
5167 branches. However, implement it correctly here as a
5168 reference for other target relax_section functions. */
5169 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5170 {
5171 /* At this stage in linking, no SEC_MERGE symbol has been
5172 adjusted, so all references to such symbols need to be
5173 passed through _bfd_merged_section_offset. (Later, in
5174 relocate_section, all SEC_MERGE symbols *except* for
5175 section symbols have been adjusted.)
5176
5177 gas may reduce relocations against symbols in SEC_MERGE
5178 sections to a relocation against the section symbol when
5179 the original addend was zero. When the reloc is against
5180 a section symbol we should include the addend in the
5181 offset passed to _bfd_merged_section_offset, since the
5182 location of interest is the original symbol. On the
5183 other hand, an access to "sym+addend" where "sym" is not
5184 a section symbol should not include the addend; Such an
5185 access is presumed to be an offset from "sym"; The
5186 location of interest is just "sym". */
5187 if (sym_type == STT_SECTION)
5188 toff += irel->r_addend;
5189
5190 toff = _bfd_merged_section_offset (abfd, &tsec,
5191 elf_section_data (tsec)->sec_info,
5192 toff);
5193
5194 if (sym_type != STT_SECTION)
5195 toff += irel->r_addend;
5196 }
5197 /* PLTREL24 addends are special. */
5198 else if (r_type != R_PPC_PLTREL24)
5199 toff += irel->r_addend;
5200
5201 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5202
5203 roff = irel->r_offset;
5204 reladdr = isec->output_section->vma + isec->output_offset + roff;
5205
5206 /* If the branch is in range, no need to do anything. */
5207 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5208 continue;
5209
5210 /* Look for an existing fixup to this address. */
5211 for (f = fixups; f ; f = f->next)
5212 if (f->tsec == tsec && f->toff == toff)
5213 break;
5214
5215 if (f == NULL)
5216 {
5217 size_t size;
5218 unsigned long stub_rtype;
5219
5220 val = trampoff - roff;
5221 if (val >= max_branch_offset)
5222 /* Oh dear, we can't reach a trampoline. Don't try to add
5223 one. We'll report an error later. */
5224 continue;
5225
5226 if (link_info->shared)
5227 {
5228 size = 4 * ARRAY_SIZE (shared_stub_entry);
5229 insn_offset = 12;
5230 stub_rtype = R_PPC_RELAX32PC;
5231 }
5232 else
5233 {
5234 size = 4 * ARRAY_SIZE (stub_entry);
5235 insn_offset = 0;
5236 stub_rtype = R_PPC_RELAX32;
5237 }
5238
5239 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5240 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5241 abort ();
5242 if (tsec == htab->plt
5243 || tsec == htab->glink)
5244 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5245
5246 /* Hijack the old relocation. Since we need two
5247 relocations for this use a "composite" reloc. */
5248 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5249 stub_rtype);
5250 irel->r_offset = trampoff + insn_offset;
5251
5252 /* Record the fixup so we don't do it again this section. */
5253 f = bfd_malloc (sizeof (*f));
5254 f->next = fixups;
5255 f->tsec = tsec;
5256 f->toff = toff;
5257 f->trampoff = trampoff;
5258 fixups = f;
5259
5260 trampoff += size;
5261 }
5262 else
5263 {
5264 val = f->trampoff - roff;
5265 if (val >= max_branch_offset)
5266 continue;
5267
5268 /* Nop out the reloc, since we're finalizing things here. */
5269 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5270 }
5271
5272 /* Get the section contents. */
5273 if (contents == NULL)
5274 {
5275 /* Get cached copy if it exists. */
5276 if (elf_section_data (isec)->this_hdr.contents != NULL)
5277 contents = elf_section_data (isec)->this_hdr.contents;
5278 else
5279 {
5280 /* Go get them off disk. */
5281 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5282 goto error_return;
5283 }
5284 }
5285
5286 /* Fix up the existing branch to hit the trampoline. */
5287 hit_addr = contents + roff;
5288 switch (r_type)
5289 {
5290 case R_PPC_REL24:
5291 case R_PPC_LOCAL24PC:
5292 case R_PPC_PLTREL24:
5293 t0 = bfd_get_32 (abfd, hit_addr);
5294 t0 &= ~0x3fffffc;
5295 t0 |= val & 0x3fffffc;
5296 bfd_put_32 (abfd, t0, hit_addr);
5297 break;
5298
5299 case R_PPC_REL14:
5300 case R_PPC_REL14_BRTAKEN:
5301 case R_PPC_REL14_BRNTAKEN:
5302 t0 = bfd_get_32 (abfd, hit_addr);
5303 t0 &= ~0xfffc;
5304 t0 |= val & 0xfffc;
5305 bfd_put_32 (abfd, t0, hit_addr);
5306 break;
5307 }
5308 }
5309
5310 /* Write out the trampolines. */
5311 changed = fixups != NULL;
5312 if (fixups != NULL)
5313 {
5314 const int *stub;
5315 bfd_byte *dest;
5316 bfd_vma val;
5317 int i, size;
5318
5319 do
5320 {
5321 struct one_fixup *f = fixups;
5322 fixups = fixups->next;
5323 free (f);
5324 }
5325 while (fixups);
5326
5327 contents = bfd_realloc (contents, trampoff);
5328 if (contents == NULL)
5329 goto error_return;
5330
5331 isec->size = (isec->size + 3) & (bfd_vma) -4;
5332 /* Branch around the trampolines. */
5333 val = trampoff - isec->size + 0x48000000;
5334 dest = contents + isec->size;
5335 isec->size = trampoff;
5336 bfd_put_32 (abfd, val, dest);
5337 dest += 4;
5338
5339 if (link_info->shared)
5340 {
5341 stub = shared_stub_entry;
5342 size = ARRAY_SIZE (shared_stub_entry);
5343 }
5344 else
5345 {
5346 stub = stub_entry;
5347 size = ARRAY_SIZE (stub_entry);
5348 }
5349
5350 i = 0;
5351 while (dest < contents + trampoff)
5352 {
5353 bfd_put_32 (abfd, stub[i], dest);
5354 i++;
5355 if (i == size)
5356 i = 0;
5357 dest += 4;
5358 }
5359 BFD_ASSERT (i == 0);
5360 }
5361
5362 if (isymbuf != NULL
5363 && symtab_hdr->contents != (unsigned char *) isymbuf)
5364 {
5365 if (! link_info->keep_memory)
5366 free (isymbuf);
5367 else
5368 {
5369 /* Cache the symbols for elf_link_input_bfd. */
5370 symtab_hdr->contents = (unsigned char *) isymbuf;
5371 }
5372 }
5373
5374 if (contents != NULL
5375 && elf_section_data (isec)->this_hdr.contents != contents)
5376 {
5377 if (!changed && !link_info->keep_memory)
5378 free (contents);
5379 else
5380 {
5381 /* Cache the section contents for elf_link_input_bfd. */
5382 elf_section_data (isec)->this_hdr.contents = contents;
5383 }
5384 }
5385
5386 if (elf_section_data (isec)->relocs != internal_relocs)
5387 {
5388 if (!changed)
5389 free (internal_relocs);
5390 else
5391 elf_section_data (isec)->relocs = internal_relocs;
5392 }
5393
5394 *again = changed;
5395 return TRUE;
5396
5397 error_return:
5398 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5399 free (isymbuf);
5400 if (contents != NULL
5401 && elf_section_data (isec)->this_hdr.contents != contents)
5402 free (contents);
5403 if (internal_relocs != NULL
5404 && elf_section_data (isec)->relocs != internal_relocs)
5405 free (internal_relocs);
5406 return FALSE;
5407 }
5408 \f
5409 /* What to do when ld finds relocations against symbols defined in
5410 discarded sections. */
5411
5412 static unsigned int
5413 ppc_elf_action_discarded (asection *sec)
5414 {
5415 if (strcmp (".fixup", sec->name) == 0)
5416 return 0;
5417
5418 if (strcmp (".got2", sec->name) == 0)
5419 return 0;
5420
5421 return _bfd_elf_default_action_discarded (sec);
5422 }
5423 \f
5424 /* Fill in the address for a pointer generated in a linker section. */
5425
5426 static bfd_vma
5427 elf_finish_pointer_linker_section (bfd *input_bfd,
5428 elf_linker_section_t *lsect,
5429 struct elf_link_hash_entry *h,
5430 bfd_vma relocation,
5431 const Elf_Internal_Rela *rel)
5432 {
5433 elf_linker_section_pointers_t *linker_section_ptr;
5434
5435 BFD_ASSERT (lsect != NULL);
5436
5437 if (h != NULL)
5438 {
5439 /* Handle global symbol. */
5440 struct ppc_elf_link_hash_entry *eh;
5441
5442 eh = (struct ppc_elf_link_hash_entry *) h;
5443 BFD_ASSERT (eh->elf.def_regular);
5444 linker_section_ptr = eh->linker_section_pointer;
5445 }
5446 else
5447 {
5448 /* Handle local symbol. */
5449 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5450
5451 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5452 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5453 }
5454
5455 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5456 rel->r_addend,
5457 lsect);
5458 BFD_ASSERT (linker_section_ptr != NULL);
5459
5460 /* Offset will always be a multiple of four, so use the bottom bit
5461 as a "written" flag. */
5462 if ((linker_section_ptr->offset & 1) == 0)
5463 {
5464 bfd_put_32 (lsect->section->owner,
5465 relocation + linker_section_ptr->addend,
5466 lsect->section->contents + linker_section_ptr->offset);
5467 linker_section_ptr->offset += 1;
5468 }
5469
5470 relocation = (lsect->section->output_offset
5471 + linker_section_ptr->offset - 1
5472 - 0x8000);
5473
5474 #ifdef DEBUG
5475 fprintf (stderr,
5476 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5477 lsect->name, (long) relocation, (long) relocation);
5478 #endif
5479
5480 /* Subtract out the addend, because it will get added back in by the normal
5481 processing. */
5482 return relocation - linker_section_ptr->addend;
5483 }
5484
5485 /* The RELOCATE_SECTION function is called by the ELF backend linker
5486 to handle the relocations for a section.
5487
5488 The relocs are always passed as Rela structures; if the section
5489 actually uses Rel structures, the r_addend field will always be
5490 zero.
5491
5492 This function is responsible for adjust the section contents as
5493 necessary, and (if using Rela relocs and generating a
5494 relocatable output file) adjusting the reloc addend as
5495 necessary.
5496
5497 This function does not have to worry about setting the reloc
5498 address or the reloc symbol index.
5499
5500 LOCAL_SYMS is a pointer to the swapped in local symbols.
5501
5502 LOCAL_SECTIONS is an array giving the section in the input file
5503 corresponding to the st_shndx field of each local symbol.
5504
5505 The global hash table entry for the global symbols can be found
5506 via elf_sym_hashes (input_bfd).
5507
5508 When generating relocatable output, this function must handle
5509 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5510 going to be the section symbol corresponding to the output
5511 section, which means that the addend must be adjusted
5512 accordingly. */
5513
5514 static bfd_boolean
5515 ppc_elf_relocate_section (bfd *output_bfd,
5516 struct bfd_link_info *info,
5517 bfd *input_bfd,
5518 asection *input_section,
5519 bfd_byte *contents,
5520 Elf_Internal_Rela *relocs,
5521 Elf_Internal_Sym *local_syms,
5522 asection **local_sections)
5523 {
5524 Elf_Internal_Shdr *symtab_hdr;
5525 struct elf_link_hash_entry **sym_hashes;
5526 struct ppc_elf_link_hash_table *htab;
5527 Elf_Internal_Rela *rel;
5528 Elf_Internal_Rela *relend;
5529 Elf_Internal_Rela outrel;
5530 bfd_byte *loc;
5531 asection *got2, *sreloc = NULL;
5532 bfd_vma *local_got_offsets;
5533 bfd_boolean ret = TRUE;
5534
5535 #ifdef DEBUG
5536 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5537 "%ld relocations%s",
5538 input_bfd, input_section,
5539 (long) input_section->reloc_count,
5540 (info->relocatable) ? " (relocatable)" : "");
5541 #endif
5542
5543 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5544
5545 if (info->relocatable)
5546 {
5547 if (got2 == NULL)
5548 return TRUE;
5549
5550 rel = relocs;
5551 relend = relocs + input_section->reloc_count;
5552 for (; rel < relend; rel++)
5553 {
5554 enum elf_ppc_reloc_type r_type;
5555
5556 r_type = ELF32_R_TYPE (rel->r_info);
5557 if (r_type == R_PPC_PLTREL24
5558 && rel->r_addend >= 32768)
5559 {
5560 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5561 addend specifies the GOT pointer offset within .got2. */
5562 rel->r_addend += got2->output_offset;
5563 }
5564 }
5565 return TRUE;
5566 }
5567
5568 /* Initialize howto table if not already done. */
5569 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5570 ppc_elf_howto_init ();
5571
5572 htab = ppc_elf_hash_table (info);
5573 local_got_offsets = elf_local_got_offsets (input_bfd);
5574 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5575 sym_hashes = elf_sym_hashes (input_bfd);
5576 rel = relocs;
5577 relend = relocs + input_section->reloc_count;
5578 for (; rel < relend; rel++)
5579 {
5580 enum elf_ppc_reloc_type r_type;
5581 bfd_vma addend;
5582 bfd_reloc_status_type r;
5583 Elf_Internal_Sym *sym;
5584 asection *sec;
5585 struct elf_link_hash_entry *h;
5586 const char *sym_name;
5587 reloc_howto_type *howto;
5588 unsigned long r_symndx;
5589 bfd_vma relocation;
5590 bfd_vma branch_bit, insn, from;
5591 bfd_boolean unresolved_reloc;
5592 bfd_boolean warned;
5593 unsigned int tls_type, tls_mask, tls_gd;
5594
5595 r_type = ELF32_R_TYPE (rel->r_info);
5596 sym = NULL;
5597 sec = NULL;
5598 h = NULL;
5599 unresolved_reloc = FALSE;
5600 warned = FALSE;
5601 r_symndx = ELF32_R_SYM (rel->r_info);
5602
5603 if (r_symndx < symtab_hdr->sh_info)
5604 {
5605 sym = local_syms + r_symndx;
5606 sec = local_sections[r_symndx];
5607 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5608
5609 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5610 }
5611 else
5612 {
5613 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5614 r_symndx, symtab_hdr, sym_hashes,
5615 h, sec, relocation,
5616 unresolved_reloc, warned);
5617
5618 sym_name = h->root.root.string;
5619 }
5620
5621 /* TLS optimizations. Replace instruction sequences and relocs
5622 based on information we collected in tls_optimize. We edit
5623 RELOCS so that --emit-relocs will output something sensible
5624 for the final instruction stream. */
5625 tls_mask = 0;
5626 tls_gd = 0;
5627 if (IS_PPC_TLS_RELOC (r_type))
5628 {
5629 if (h != NULL)
5630 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5631 else if (local_got_offsets != NULL)
5632 {
5633 char *lgot_masks;
5634 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5635 tls_mask = lgot_masks[r_symndx];
5636 }
5637 }
5638
5639 /* Ensure reloc mapping code below stays sane. */
5640 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5641 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5642 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5643 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5644 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5645 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5646 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5647 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5648 abort ();
5649 switch (r_type)
5650 {
5651 default:
5652 break;
5653
5654 case R_PPC_GOT_TPREL16:
5655 case R_PPC_GOT_TPREL16_LO:
5656 if (tls_mask != 0
5657 && (tls_mask & TLS_TPREL) == 0)
5658 {
5659 bfd_vma insn;
5660 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5661 insn &= 31 << 21;
5662 insn |= 0x3c020000; /* addis 0,2,0 */
5663 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5664 r_type = R_PPC_TPREL16_HA;
5665 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5666 }
5667 break;
5668
5669 case R_PPC_TLS:
5670 if (tls_mask != 0
5671 && (tls_mask & TLS_TPREL) == 0)
5672 {
5673 bfd_vma insn, rtra;
5674 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5675 if ((insn & ((31 << 26) | (31 << 11)))
5676 == ((31 << 26) | (2 << 11)))
5677 rtra = insn & ((1 << 26) - (1 << 16));
5678 else if ((insn & ((31 << 26) | (31 << 16)))
5679 == ((31 << 26) | (2 << 16)))
5680 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5681 else
5682 abort ();
5683 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5684 /* add -> addi. */
5685 insn = 14 << 26;
5686 else if ((insn & (31 << 1)) == 23 << 1
5687 && ((insn & (31 << 6)) < 14 << 6
5688 || ((insn & (31 << 6)) >= 16 << 6
5689 && (insn & (31 << 6)) < 24 << 6)))
5690 /* load and store indexed -> dform. */
5691 insn = (32 | ((insn >> 6) & 31)) << 26;
5692 else if ((insn & (31 << 1)) == 21 << 1
5693 && (insn & (0x1a << 6)) == 0)
5694 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5695 insn = (((58 | ((insn >> 6) & 4)) << 26)
5696 | ((insn >> 6) & 1));
5697 else if ((insn & (31 << 1)) == 21 << 1
5698 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5699 /* lwax -> lwa. */
5700 insn = (58 << 26) | 2;
5701 else
5702 abort ();
5703 insn |= rtra;
5704 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5705 r_type = R_PPC_TPREL16_LO;
5706 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5707 /* Was PPC_TLS which sits on insn boundary, now
5708 PPC_TPREL16_LO which is at insn+2. */
5709 rel->r_offset += 2;
5710 }
5711 break;
5712
5713 case R_PPC_GOT_TLSGD16_HI:
5714 case R_PPC_GOT_TLSGD16_HA:
5715 tls_gd = TLS_TPRELGD;
5716 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5717 goto tls_gdld_hi;
5718 break;
5719
5720 case R_PPC_GOT_TLSLD16_HI:
5721 case R_PPC_GOT_TLSLD16_HA:
5722 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5723 {
5724 tls_gdld_hi:
5725 if ((tls_mask & tls_gd) != 0)
5726 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5727 + R_PPC_GOT_TPREL16);
5728 else
5729 {
5730 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5731 rel->r_offset -= 2;
5732 r_type = R_PPC_NONE;
5733 }
5734 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5735 }
5736 break;
5737
5738 case R_PPC_GOT_TLSGD16:
5739 case R_PPC_GOT_TLSGD16_LO:
5740 tls_gd = TLS_TPRELGD;
5741 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5742 goto tls_get_addr_check;
5743 break;
5744
5745 case R_PPC_GOT_TLSLD16:
5746 case R_PPC_GOT_TLSLD16_LO:
5747 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5748 {
5749 tls_get_addr_check:
5750 if (rel + 1 < relend)
5751 {
5752 enum elf_ppc_reloc_type r_type2;
5753 unsigned long r_symndx2;
5754 struct elf_link_hash_entry *h2;
5755 bfd_vma insn1, insn2;
5756 bfd_vma offset;
5757
5758 /* The next instruction should be a call to
5759 __tls_get_addr. Peek at the reloc to be sure. */
5760 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5761 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5762 if (r_symndx2 < symtab_hdr->sh_info
5763 || (r_type2 != R_PPC_REL14
5764 && r_type2 != R_PPC_REL14_BRTAKEN
5765 && r_type2 != R_PPC_REL14_BRNTAKEN
5766 && r_type2 != R_PPC_REL24
5767 && r_type2 != R_PPC_PLTREL24))
5768 break;
5769
5770 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5771 while (h2->root.type == bfd_link_hash_indirect
5772 || h2->root.type == bfd_link_hash_warning)
5773 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5774 if (h2 == NULL || h2 != htab->tls_get_addr)
5775 break;
5776
5777 /* OK, it checks out. Replace the call. */
5778 offset = rel[1].r_offset;
5779 insn1 = bfd_get_32 (output_bfd,
5780 contents + rel->r_offset - 2);
5781 if ((tls_mask & tls_gd) != 0)
5782 {
5783 /* IE */
5784 insn1 &= (1 << 26) - 1;
5785 insn1 |= 32 << 26; /* lwz */
5786 insn2 = 0x7c631214; /* add 3,3,2 */
5787 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5788 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5789 + R_PPC_GOT_TPREL16);
5790 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5791 }
5792 else
5793 {
5794 /* LE */
5795 insn1 = 0x3c620000; /* addis 3,2,0 */
5796 insn2 = 0x38630000; /* addi 3,3,0 */
5797 if (tls_gd == 0)
5798 {
5799 /* Was an LD reloc. */
5800 r_symndx = 0;
5801 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5802 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5803 }
5804 r_type = R_PPC_TPREL16_HA;
5805 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5806 rel[1].r_info = ELF32_R_INFO (r_symndx,
5807 R_PPC_TPREL16_LO);
5808 rel[1].r_offset += 2;
5809 }
5810 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5811 bfd_put_32 (output_bfd, insn2, contents + offset);
5812 if (tls_gd == 0)
5813 {
5814 /* We changed the symbol on an LD reloc. Start over
5815 in order to get h, sym, sec etc. right. */
5816 rel--;
5817 continue;
5818 }
5819 }
5820 }
5821 break;
5822 }
5823
5824 /* Handle other relocations that tweak non-addend part of insn. */
5825 branch_bit = 0;
5826 switch (r_type)
5827 {
5828 default:
5829 break;
5830
5831 /* Branch taken prediction relocations. */
5832 case R_PPC_ADDR14_BRTAKEN:
5833 case R_PPC_REL14_BRTAKEN:
5834 branch_bit = BRANCH_PREDICT_BIT;
5835 /* Fall thru */
5836
5837 /* Branch not taken prediction relocations. */
5838 case R_PPC_ADDR14_BRNTAKEN:
5839 case R_PPC_REL14_BRNTAKEN:
5840 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5841 insn &= ~BRANCH_PREDICT_BIT;
5842 insn |= branch_bit;
5843
5844 from = (rel->r_offset
5845 + input_section->output_offset
5846 + input_section->output_section->vma);
5847
5848 /* Invert 'y' bit if not the default. */
5849 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5850 insn ^= BRANCH_PREDICT_BIT;
5851
5852 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5853 break;
5854 }
5855
5856 addend = rel->r_addend;
5857 tls_type = 0;
5858 howto = NULL;
5859 if (r_type < R_PPC_max)
5860 howto = ppc_elf_howto_table[r_type];
5861 switch (r_type)
5862 {
5863 default:
5864 (*_bfd_error_handler)
5865 (_("%B: unknown relocation type %d for symbol %s"),
5866 input_bfd, (int) r_type, sym_name);
5867
5868 bfd_set_error (bfd_error_bad_value);
5869 ret = FALSE;
5870 continue;
5871
5872 case R_PPC_NONE:
5873 case R_PPC_TLS:
5874 case R_PPC_EMB_MRKREF:
5875 case R_PPC_GNU_VTINHERIT:
5876 case R_PPC_GNU_VTENTRY:
5877 continue;
5878
5879 /* GOT16 relocations. Like an ADDR16 using the symbol's
5880 address in the GOT as relocation value instead of the
5881 symbol's value itself. Also, create a GOT entry for the
5882 symbol and put the symbol value there. */
5883 case R_PPC_GOT_TLSGD16:
5884 case R_PPC_GOT_TLSGD16_LO:
5885 case R_PPC_GOT_TLSGD16_HI:
5886 case R_PPC_GOT_TLSGD16_HA:
5887 tls_type = TLS_TLS | TLS_GD;
5888 goto dogot;
5889
5890 case R_PPC_GOT_TLSLD16:
5891 case R_PPC_GOT_TLSLD16_LO:
5892 case R_PPC_GOT_TLSLD16_HI:
5893 case R_PPC_GOT_TLSLD16_HA:
5894 tls_type = TLS_TLS | TLS_LD;
5895 goto dogot;
5896
5897 case R_PPC_GOT_TPREL16:
5898 case R_PPC_GOT_TPREL16_LO:
5899 case R_PPC_GOT_TPREL16_HI:
5900 case R_PPC_GOT_TPREL16_HA:
5901 tls_type = TLS_TLS | TLS_TPREL;
5902 goto dogot;
5903
5904 case R_PPC_GOT_DTPREL16:
5905 case R_PPC_GOT_DTPREL16_LO:
5906 case R_PPC_GOT_DTPREL16_HI:
5907 case R_PPC_GOT_DTPREL16_HA:
5908 tls_type = TLS_TLS | TLS_DTPREL;
5909 goto dogot;
5910
5911 case R_PPC_GOT16:
5912 case R_PPC_GOT16_LO:
5913 case R_PPC_GOT16_HI:
5914 case R_PPC_GOT16_HA:
5915 dogot:
5916 {
5917 /* Relocation is to the entry for this symbol in the global
5918 offset table. */
5919 bfd_vma off;
5920 bfd_vma *offp;
5921 unsigned long indx;
5922
5923 if (htab->got == NULL)
5924 abort ();
5925
5926 indx = 0;
5927 if (tls_type == (TLS_TLS | TLS_LD)
5928 && (h == NULL
5929 || !h->def_dynamic))
5930 offp = &htab->tlsld_got.offset;
5931 else if (h != NULL)
5932 {
5933 bfd_boolean dyn;
5934 dyn = htab->elf.dynamic_sections_created;
5935 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5936 || (info->shared
5937 && SYMBOL_REFERENCES_LOCAL (info, h)))
5938 /* This is actually a static link, or it is a
5939 -Bsymbolic link and the symbol is defined
5940 locally, or the symbol was forced to be local
5941 because of a version file. */
5942 ;
5943 else
5944 {
5945 indx = h->dynindx;
5946 unresolved_reloc = FALSE;
5947 }
5948 offp = &h->got.offset;
5949 }
5950 else
5951 {
5952 if (local_got_offsets == NULL)
5953 abort ();
5954 offp = &local_got_offsets[r_symndx];
5955 }
5956
5957 /* The offset must always be a multiple of 4. We use the
5958 least significant bit to record whether we have already
5959 processed this entry. */
5960 off = *offp;
5961 if ((off & 1) != 0)
5962 off &= ~1;
5963 else
5964 {
5965 unsigned int tls_m = (tls_mask
5966 & (TLS_LD | TLS_GD | TLS_DTPREL
5967 | TLS_TPREL | TLS_TPRELGD));
5968
5969 if (offp == &htab->tlsld_got.offset)
5970 tls_m = TLS_LD;
5971 else if (h == NULL
5972 || !h->def_dynamic)
5973 tls_m &= ~TLS_LD;
5974
5975 /* We might have multiple got entries for this sym.
5976 Initialize them all. */
5977 do
5978 {
5979 int tls_ty = 0;
5980
5981 if ((tls_m & TLS_LD) != 0)
5982 {
5983 tls_ty = TLS_TLS | TLS_LD;
5984 tls_m &= ~TLS_LD;
5985 }
5986 else if ((tls_m & TLS_GD) != 0)
5987 {
5988 tls_ty = TLS_TLS | TLS_GD;
5989 tls_m &= ~TLS_GD;
5990 }
5991 else if ((tls_m & TLS_DTPREL) != 0)
5992 {
5993 tls_ty = TLS_TLS | TLS_DTPREL;
5994 tls_m &= ~TLS_DTPREL;
5995 }
5996 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5997 {
5998 tls_ty = TLS_TLS | TLS_TPREL;
5999 tls_m = 0;
6000 }
6001
6002 /* Generate relocs for the dynamic linker. */
6003 if ((info->shared || indx != 0)
6004 && (h == NULL
6005 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6006 || h->root.type != bfd_link_hash_undefweak))
6007 {
6008 outrel.r_offset = (htab->got->output_section->vma
6009 + htab->got->output_offset
6010 + off);
6011 outrel.r_addend = 0;
6012 if (tls_ty & (TLS_LD | TLS_GD))
6013 {
6014 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
6015 if (tls_ty == (TLS_TLS | TLS_GD))
6016 {
6017 loc = htab->relgot->contents;
6018 loc += (htab->relgot->reloc_count++
6019 * sizeof (Elf32_External_Rela));
6020 bfd_elf32_swap_reloca_out (output_bfd,
6021 &outrel, loc);
6022 outrel.r_offset += 4;
6023 outrel.r_info
6024 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6025 }
6026 }
6027 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
6028 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
6029 else if (tls_ty == (TLS_TLS | TLS_TPREL))
6030 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
6031 else if (indx == 0)
6032 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
6033 else
6034 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
6035 if (indx == 0)
6036 {
6037 outrel.r_addend += relocation;
6038 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
6039 outrel.r_addend -= htab->elf.tls_sec->vma;
6040 }
6041 loc = htab->relgot->contents;
6042 loc += (htab->relgot->reloc_count++
6043 * sizeof (Elf32_External_Rela));
6044 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6045 }
6046
6047 /* Init the .got section contents if we're not
6048 emitting a reloc. */
6049 else
6050 {
6051 bfd_vma value = relocation;
6052
6053 if (tls_ty == (TLS_TLS | TLS_LD))
6054 value = 1;
6055 else if (tls_ty != 0)
6056 {
6057 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
6058 if (tls_ty == (TLS_TLS | TLS_TPREL))
6059 value += DTP_OFFSET - TP_OFFSET;
6060
6061 if (tls_ty == (TLS_TLS | TLS_GD))
6062 {
6063 bfd_put_32 (output_bfd, value,
6064 htab->got->contents + off + 4);
6065 value = 1;
6066 }
6067 }
6068 bfd_put_32 (output_bfd, value,
6069 htab->got->contents + off);
6070 }
6071
6072 off += 4;
6073 if (tls_ty & (TLS_LD | TLS_GD))
6074 off += 4;
6075 }
6076 while (tls_m != 0);
6077
6078 off = *offp;
6079 *offp = off | 1;
6080 }
6081
6082 if (off >= (bfd_vma) -2)
6083 abort ();
6084
6085 if ((tls_type & TLS_TLS) != 0)
6086 {
6087 if (tls_type != (TLS_TLS | TLS_LD))
6088 {
6089 if ((tls_mask & TLS_LD) != 0
6090 && !(h == NULL
6091 || !h->def_dynamic))
6092 off += 8;
6093 if (tls_type != (TLS_TLS | TLS_GD))
6094 {
6095 if ((tls_mask & TLS_GD) != 0)
6096 off += 8;
6097 if (tls_type != (TLS_TLS | TLS_DTPREL))
6098 {
6099 if ((tls_mask & TLS_DTPREL) != 0)
6100 off += 4;
6101 }
6102 }
6103 }
6104 }
6105
6106 relocation = htab->got->output_offset + off;
6107 relocation -= htab->elf.hgot->root.u.def.value;
6108
6109 /* Addends on got relocations don't make much sense.
6110 x+off@got is actually x@got+off, and since the got is
6111 generated by a hash table traversal, the value in the
6112 got at entry m+n bears little relation to the entry m. */
6113 if (addend != 0)
6114 (*_bfd_error_handler)
6115 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6116 input_bfd,
6117 input_section,
6118 (long) rel->r_offset,
6119 howto->name,
6120 sym_name);
6121 }
6122 break;
6123
6124 /* Relocations that need no special processing. */
6125 case R_PPC_LOCAL24PC:
6126 /* It makes no sense to point a local relocation
6127 at a symbol not in this object. */
6128 if (unresolved_reloc)
6129 {
6130 if (! (*info->callbacks->undefined_symbol) (info,
6131 h->root.root.string,
6132 input_bfd,
6133 input_section,
6134 rel->r_offset,
6135 TRUE))
6136 return FALSE;
6137 continue;
6138 }
6139 break;
6140
6141 case R_PPC_DTPREL16:
6142 case R_PPC_DTPREL16_LO:
6143 case R_PPC_DTPREL16_HI:
6144 case R_PPC_DTPREL16_HA:
6145 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6146 break;
6147
6148 /* Relocations that may need to be propagated if this is a shared
6149 object. */
6150 case R_PPC_TPREL16:
6151 case R_PPC_TPREL16_LO:
6152 case R_PPC_TPREL16_HI:
6153 case R_PPC_TPREL16_HA:
6154 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6155 /* The TPREL16 relocs shouldn't really be used in shared
6156 libs as they will result in DT_TEXTREL being set, but
6157 support them anyway. */
6158 goto dodyn;
6159
6160 case R_PPC_TPREL32:
6161 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6162 goto dodyn;
6163
6164 case R_PPC_DTPREL32:
6165 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6166 goto dodyn;
6167
6168 case R_PPC_DTPMOD32:
6169 relocation = 1;
6170 addend = 0;
6171 goto dodyn;
6172
6173 case R_PPC_REL16:
6174 case R_PPC_REL16_LO:
6175 case R_PPC_REL16_HI:
6176 case R_PPC_REL16_HA:
6177 break;
6178
6179 case R_PPC_REL24:
6180 case R_PPC_REL32:
6181 case R_PPC_REL14:
6182 case R_PPC_REL14_BRTAKEN:
6183 case R_PPC_REL14_BRNTAKEN:
6184 /* If these relocations are not to a named symbol, they can be
6185 handled right here, no need to bother the dynamic linker. */
6186 if (SYMBOL_REFERENCES_LOCAL (info, h)
6187 || h == htab->elf.hgot)
6188 break;
6189 /* fall through */
6190
6191 /* Relocations that always need to be propagated if this is a shared
6192 object. */
6193 case R_PPC_ADDR32:
6194 case R_PPC_ADDR24:
6195 case R_PPC_ADDR16:
6196 case R_PPC_ADDR16_LO:
6197 case R_PPC_ADDR16_HI:
6198 case R_PPC_ADDR16_HA:
6199 case R_PPC_ADDR14:
6200 case R_PPC_ADDR14_BRTAKEN:
6201 case R_PPC_ADDR14_BRNTAKEN:
6202 case R_PPC_UADDR32:
6203 case R_PPC_UADDR16:
6204 /* r_symndx will be zero only for relocs against symbols
6205 from removed linkonce sections, or sections discarded by
6206 a linker script. */
6207 dodyn:
6208 if (r_symndx == 0)
6209 break;
6210 /* Fall thru. */
6211
6212 if ((input_section->flags & SEC_ALLOC) == 0)
6213 break;
6214 /* Fall thru. */
6215
6216 if ((info->shared
6217 && (h == NULL
6218 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6219 || h->root.type != bfd_link_hash_undefweak)
6220 && (MUST_BE_DYN_RELOC (r_type)
6221 || !SYMBOL_CALLS_LOCAL (info, h)))
6222 || (ELIMINATE_COPY_RELOCS
6223 && !info->shared
6224 && h != NULL
6225 && h->dynindx != -1
6226 && !h->non_got_ref
6227 && h->def_dynamic
6228 && !h->def_regular))
6229 {
6230 int skip;
6231
6232 #ifdef DEBUG
6233 fprintf (stderr, "ppc_elf_relocate_section needs to "
6234 "create relocation for %s\n",
6235 (h && h->root.root.string
6236 ? h->root.root.string : "<unknown>"));
6237 #endif
6238
6239 /* When generating a shared object, these relocations
6240 are copied into the output file to be resolved at run
6241 time. */
6242 if (sreloc == NULL)
6243 {
6244 const char *name;
6245
6246 name = (bfd_elf_string_from_elf_section
6247 (input_bfd,
6248 elf_elfheader (input_bfd)->e_shstrndx,
6249 elf_section_data (input_section)->rel_hdr.sh_name));
6250 if (name == NULL)
6251 return FALSE;
6252
6253 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6254 && strcmp (bfd_get_section_name (input_bfd,
6255 input_section),
6256 name + 5) == 0);
6257
6258 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6259 BFD_ASSERT (sreloc != NULL);
6260 }
6261
6262 skip = 0;
6263
6264 outrel.r_offset =
6265 _bfd_elf_section_offset (output_bfd, info, input_section,
6266 rel->r_offset);
6267 if (outrel.r_offset == (bfd_vma) -1
6268 || outrel.r_offset == (bfd_vma) -2)
6269 skip = (int) outrel.r_offset;
6270 outrel.r_offset += (input_section->output_section->vma
6271 + input_section->output_offset);
6272
6273 if (skip)
6274 memset (&outrel, 0, sizeof outrel);
6275 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6276 {
6277 unresolved_reloc = FALSE;
6278 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6279 outrel.r_addend = rel->r_addend;
6280 }
6281 else
6282 {
6283 outrel.r_addend = relocation + rel->r_addend;
6284
6285 if (r_type == R_PPC_ADDR32)
6286 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6287 else
6288 {
6289 long indx;
6290
6291 if (bfd_is_abs_section (sec))
6292 indx = 0;
6293 else if (sec == NULL || sec->owner == NULL)
6294 {
6295 bfd_set_error (bfd_error_bad_value);
6296 return FALSE;
6297 }
6298 else
6299 {
6300 asection *osec;
6301
6302 /* We are turning this relocation into one
6303 against a section symbol. It would be
6304 proper to subtract the symbol's value,
6305 osec->vma, from the emitted reloc addend,
6306 but ld.so expects buggy relocs. */
6307 osec = sec->output_section;
6308 indx = elf_section_data (osec)->dynindx;
6309 BFD_ASSERT (indx > 0);
6310 #ifdef DEBUG
6311 if (indx <= 0)
6312 printf ("indx=%d section=%s flags=%08x name=%s\n",
6313 indx, osec->name, osec->flags,
6314 h->root.root.string);
6315 #endif
6316 }
6317
6318 outrel.r_info = ELF32_R_INFO (indx, r_type);
6319 }
6320 }
6321
6322 loc = sreloc->contents;
6323 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6324 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6325
6326 if (skip == -1)
6327 continue;
6328
6329 /* This reloc will be computed at runtime. We clear the memory
6330 so that it contains predictable value. */
6331 if (! skip
6332 && ((input_section->flags & SEC_ALLOC) != 0
6333 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6334 {
6335 relocation = howto->pc_relative ? outrel.r_offset : 0;
6336 addend = 0;
6337 break;
6338 }
6339 }
6340 break;
6341
6342 case R_PPC_RELAX32PC_PLT:
6343 case R_PPC_RELAX32_PLT:
6344 {
6345 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6346
6347 if (!htab->old_plt)
6348 relocation = (htab->glink->output_section->vma
6349 + htab->glink->output_offset
6350 + ent->glink_offset);
6351 else
6352 relocation = (htab->plt->output_section->vma
6353 + htab->plt->output_offset
6354 + ent->plt.offset);
6355 addend = 0;
6356 }
6357 if (r_type == R_PPC_RELAX32_PLT)
6358 goto relax32;
6359 /* Fall thru */
6360
6361 case R_PPC_RELAX32PC:
6362 relocation -= (input_section->output_section->vma
6363 + input_section->output_offset
6364 + rel->r_offset - 4);
6365 /* Fall thru */
6366
6367 case R_PPC_RELAX32:
6368 relax32:
6369 {
6370 unsigned long t0;
6371 unsigned long t1;
6372
6373 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6374 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6375
6376 /* We're clearing the bits for R_PPC_ADDR16_HA
6377 and R_PPC_ADDR16_LO here. */
6378 t0 &= ~0xffff;
6379 t1 &= ~0xffff;
6380
6381 /* t0 is HA, t1 is LO */
6382 relocation += addend;
6383 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6384 t1 |= relocation & 0xffff;
6385
6386 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6387 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6388 }
6389 continue;
6390
6391 /* Indirect .sdata relocation. */
6392 case R_PPC_EMB_SDAI16:
6393 BFD_ASSERT (htab->sdata[0].section != NULL);
6394 relocation
6395 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6396 h, relocation, rel);
6397 break;
6398
6399 /* Indirect .sdata2 relocation. */
6400 case R_PPC_EMB_SDA2I16:
6401 BFD_ASSERT (htab->sdata[1].section != NULL);
6402 relocation
6403 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6404 h, relocation, rel);
6405 break;
6406
6407 /* Handle the TOC16 reloc. We want to use the offset within the .got
6408 section, not the actual VMA. This is appropriate when generating
6409 an embedded ELF object, for which the .got section acts like the
6410 AIX .toc section. */
6411 case R_PPC_TOC16: /* phony GOT16 relocations */
6412 BFD_ASSERT (sec != NULL);
6413 BFD_ASSERT (bfd_is_und_section (sec)
6414 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6415 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6416
6417 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6418 break;
6419
6420 case R_PPC_PLTREL24:
6421 /* Relocation is to the entry for this symbol in the
6422 procedure linkage table. */
6423 {
6424 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6425
6426 addend = 0;
6427 if (ent == NULL
6428 || htab->plt == NULL)
6429 {
6430 /* We didn't make a PLT entry for this symbol. This
6431 happens when statically linking PIC code, or when
6432 using -Bsymbolic. */
6433 break;
6434 }
6435
6436 unresolved_reloc = FALSE;
6437 if (!htab->old_plt)
6438 relocation = (htab->glink->output_section->vma
6439 + htab->glink->output_offset
6440 + ent->glink_offset);
6441 else
6442 relocation = (htab->plt->output_section->vma
6443 + htab->plt->output_offset
6444 + ent->plt.offset);
6445 }
6446 break;
6447
6448 /* Relocate against _SDA_BASE_. */
6449 case R_PPC_SDAREL16:
6450 {
6451 const char *name;
6452 struct elf_link_hash_entry *sh;
6453
6454 BFD_ASSERT (sec != NULL);
6455 name = bfd_get_section_name (abfd, sec->output_section);
6456 if (! ((strncmp (name, ".sdata", 6) == 0
6457 && (name[6] == 0 || name[6] == '.'))
6458 || (strncmp (name, ".sbss", 5) == 0
6459 && (name[5] == 0 || name[5] == '.'))))
6460 {
6461 (*_bfd_error_handler)
6462 (_("%B: the target (%s) of a %s relocation is "
6463 "in the wrong output section (%s)"),
6464 input_bfd,
6465 sym_name,
6466 howto->name,
6467 name);
6468 }
6469 sh = htab->sdata[0].sym;
6470 addend -= (sh->root.u.def.value
6471 + sh->root.u.def.section->output_offset
6472 + sh->root.u.def.section->output_section->vma);
6473 }
6474 break;
6475
6476 /* Relocate against _SDA2_BASE_. */
6477 case R_PPC_EMB_SDA2REL:
6478 {
6479 const char *name;
6480 struct elf_link_hash_entry *sh;
6481
6482 BFD_ASSERT (sec != NULL);
6483 name = bfd_get_section_name (abfd, sec->output_section);
6484 if (! (strncmp (name, ".sdata2", 7) == 0
6485 || strncmp (name, ".sbss2", 6) == 0))
6486 {
6487 (*_bfd_error_handler)
6488 (_("%B: the target (%s) of a %s relocation is "
6489 "in the wrong output section (%s)"),
6490 input_bfd,
6491 sym_name,
6492 howto->name,
6493 name);
6494
6495 bfd_set_error (bfd_error_bad_value);
6496 ret = FALSE;
6497 continue;
6498 }
6499 sh = htab->sdata[1].sym;
6500 addend -= (sh->root.u.def.value
6501 + sh->root.u.def.section->output_offset
6502 + sh->root.u.def.section->output_section->vma);
6503 }
6504 break;
6505
6506 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6507 case R_PPC_EMB_SDA21:
6508 case R_PPC_EMB_RELSDA:
6509 {
6510 const char *name;
6511 int reg;
6512 struct elf_link_hash_entry *sh;
6513
6514 BFD_ASSERT (sec != NULL);
6515 name = bfd_get_section_name (abfd, sec->output_section);
6516 if (((strncmp (name, ".sdata", 6) == 0
6517 && (name[6] == 0 || name[6] == '.'))
6518 || (strncmp (name, ".sbss", 5) == 0
6519 && (name[5] == 0 || name[5] == '.'))))
6520 {
6521 reg = 13;
6522 sh = htab->sdata[0].sym;
6523 addend -= (sh->root.u.def.value
6524 + sh->root.u.def.section->output_offset
6525 + sh->root.u.def.section->output_section->vma);
6526 }
6527
6528 else if (strncmp (name, ".sdata2", 7) == 0
6529 || strncmp (name, ".sbss2", 6) == 0)
6530 {
6531 reg = 2;
6532 sh = htab->sdata[1].sym;
6533 addend -= (sh->root.u.def.value
6534 + sh->root.u.def.section->output_offset
6535 + sh->root.u.def.section->output_section->vma);
6536 }
6537
6538 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6539 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6540 {
6541 reg = 0;
6542 }
6543
6544 else
6545 {
6546 (*_bfd_error_handler)
6547 (_("%B: the target (%s) of a %s relocation is "
6548 "in the wrong output section (%s)"),
6549 input_bfd,
6550 sym_name,
6551 howto->name,
6552 name);
6553
6554 bfd_set_error (bfd_error_bad_value);
6555 ret = FALSE;
6556 continue;
6557 }
6558
6559 if (r_type == R_PPC_EMB_SDA21)
6560 { /* fill in register field */
6561 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6562 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6563 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6564 }
6565 }
6566 break;
6567
6568 /* Relocate against the beginning of the section. */
6569 case R_PPC_SECTOFF:
6570 case R_PPC_SECTOFF_LO:
6571 case R_PPC_SECTOFF_HI:
6572 case R_PPC_SECTOFF_HA:
6573 BFD_ASSERT (sec != NULL);
6574 addend -= sec->output_section->vma;
6575 break;
6576
6577 /* Negative relocations. */
6578 case R_PPC_EMB_NADDR32:
6579 case R_PPC_EMB_NADDR16:
6580 case R_PPC_EMB_NADDR16_LO:
6581 case R_PPC_EMB_NADDR16_HI:
6582 case R_PPC_EMB_NADDR16_HA:
6583 addend -= 2 * relocation;
6584 break;
6585
6586 case R_PPC_COPY:
6587 case R_PPC_GLOB_DAT:
6588 case R_PPC_JMP_SLOT:
6589 case R_PPC_RELATIVE:
6590 case R_PPC_PLT32:
6591 case R_PPC_PLTREL32:
6592 case R_PPC_PLT16_LO:
6593 case R_PPC_PLT16_HI:
6594 case R_PPC_PLT16_HA:
6595 case R_PPC_ADDR30:
6596 case R_PPC_EMB_RELSEC16:
6597 case R_PPC_EMB_RELST_LO:
6598 case R_PPC_EMB_RELST_HI:
6599 case R_PPC_EMB_RELST_HA:
6600 case R_PPC_EMB_BIT_FLD:
6601 (*_bfd_error_handler)
6602 (_("%B: relocation %s is not yet supported for symbol %s."),
6603 input_bfd,
6604 howto->name,
6605 sym_name);
6606
6607 bfd_set_error (bfd_error_invalid_operation);
6608 ret = FALSE;
6609 continue;
6610 }
6611
6612 /* Do any further special processing. */
6613 switch (r_type)
6614 {
6615 default:
6616 break;
6617
6618 case R_PPC_ADDR16_HA:
6619 case R_PPC_REL16_HA:
6620 case R_PPC_GOT16_HA:
6621 case R_PPC_PLT16_HA:
6622 case R_PPC_SECTOFF_HA:
6623 case R_PPC_TPREL16_HA:
6624 case R_PPC_DTPREL16_HA:
6625 case R_PPC_GOT_TLSGD16_HA:
6626 case R_PPC_GOT_TLSLD16_HA:
6627 case R_PPC_GOT_TPREL16_HA:
6628 case R_PPC_GOT_DTPREL16_HA:
6629 case R_PPC_EMB_NADDR16_HA:
6630 case R_PPC_EMB_RELST_HA:
6631 /* It's just possible that this symbol is a weak symbol
6632 that's not actually defined anywhere. In that case,
6633 'sec' would be NULL, and we should leave the symbol
6634 alone (it will be set to zero elsewhere in the link). */
6635 if (sec != NULL)
6636 /* Add 0x10000 if sign bit in 0:15 is set.
6637 Bits 0:15 are not used. */
6638 addend += 0x8000;
6639 break;
6640 }
6641
6642 #ifdef DEBUG
6643 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6644 "offset = %ld, addend = %ld\n",
6645 howto->name,
6646 (int) r_type,
6647 sym_name,
6648 r_symndx,
6649 (long) rel->r_offset,
6650 (long) addend);
6651 #endif
6652
6653 if (unresolved_reloc
6654 && !((input_section->flags & SEC_DEBUGGING) != 0
6655 && h->def_dynamic))
6656 {
6657 (*_bfd_error_handler)
6658 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6659 input_bfd,
6660 input_section,
6661 (long) rel->r_offset,
6662 howto->name,
6663 sym_name);
6664 ret = FALSE;
6665 }
6666
6667 r = _bfd_final_link_relocate (howto,
6668 input_bfd,
6669 input_section,
6670 contents,
6671 rel->r_offset,
6672 relocation,
6673 addend);
6674
6675 if (r != bfd_reloc_ok)
6676 {
6677 if (r == bfd_reloc_overflow)
6678 {
6679 if (warned)
6680 continue;
6681 if (h != NULL
6682 && h->root.type == bfd_link_hash_undefweak
6683 && howto->pc_relative)
6684 {
6685 /* Assume this is a call protected by other code that
6686 detect the symbol is undefined. If this is the case,
6687 we can safely ignore the overflow. If not, the
6688 program is hosed anyway, and a little warning isn't
6689 going to help. */
6690
6691 continue;
6692 }
6693
6694 if (! (*info->callbacks->reloc_overflow) (info,
6695 (h ? &h->root : NULL),
6696 sym_name,
6697 howto->name,
6698 rel->r_addend,
6699 input_bfd,
6700 input_section,
6701 rel->r_offset))
6702 return FALSE;
6703 }
6704 else
6705 {
6706 (*_bfd_error_handler)
6707 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6708 input_bfd, input_section,
6709 (long) rel->r_offset, howto->name, sym_name, (int) r);
6710 ret = FALSE;
6711 }
6712 }
6713 }
6714
6715 #ifdef DEBUG
6716 fprintf (stderr, "\n");
6717 #endif
6718
6719 return ret;
6720 }
6721 \f
6722 #define PPC_LO(v) ((v) & 0xffff)
6723 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6724 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6725
6726 /* Finish up dynamic symbol handling. We set the contents of various
6727 dynamic sections here. */
6728
6729 static bfd_boolean
6730 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6731 struct bfd_link_info *info,
6732 struct elf_link_hash_entry *h,
6733 Elf_Internal_Sym *sym)
6734 {
6735 struct ppc_elf_link_hash_table *htab;
6736 struct plt_entry *ent;
6737 bfd_boolean doneone;
6738
6739 #ifdef DEBUG
6740 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6741 h->root.root.string);
6742 #endif
6743
6744 htab = ppc_elf_hash_table (info);
6745 BFD_ASSERT (htab->elf.dynobj != NULL);
6746
6747 doneone = FALSE;
6748 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6749 if (ent->plt.offset != (bfd_vma) -1)
6750 {
6751 if (!doneone)
6752 {
6753 Elf_Internal_Rela rela;
6754 bfd_byte *loc;
6755 bfd_vma reloc_index;
6756
6757 if (!(htab->old_plt || htab->is_vxworks))
6758 reloc_index = ent->plt.offset / 4;
6759 else
6760 {
6761 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6762 / htab->plt_slot_size);
6763 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6764 && !htab->is_vxworks)
6765 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6766 }
6767
6768 /* This symbol has an entry in the procedure linkage table.
6769 Set it up. */
6770 if (htab->is_vxworks)
6771 {
6772 bfd_vma got_offset;
6773 const bfd_vma *plt_entry;
6774
6775 /* The first three entries in .got.plt are reserved. */
6776 got_offset = (reloc_index + 3) * 4;
6777
6778 /* Use the right PLT. */
6779 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6780 : ppc_elf_vxworks_plt_entry;
6781
6782 /* Fill in the .plt on VxWorks. */
6783 if (info->shared)
6784 {
6785 bfd_vma got_offset_hi = (got_offset >> 16)
6786 + ((got_offset & 0x8000) >> 15);
6787
6788 bfd_put_32 (output_bfd,
6789 plt_entry[0] | (got_offset_hi & 0xffff),
6790 htab->plt->contents + ent->plt.offset + 0);
6791 bfd_put_32 (output_bfd,
6792 plt_entry[1] | (got_offset & 0xffff),
6793 htab->plt->contents + ent->plt.offset + 4);
6794 }
6795 else
6796 {
6797 bfd_vma got_loc
6798 = (got_offset
6799 + htab->elf.hgot->root.u.def.value
6800 + htab->elf.hgot->root.u.def.section->output_offset
6801 + htab->elf.hgot->root.u.def.section->output_section->vma);
6802 bfd_vma got_loc_hi = (got_loc >> 16)
6803 + ((got_loc & 0x8000) >> 15);
6804
6805 bfd_put_32 (output_bfd,
6806 plt_entry[0] | (got_loc_hi & 0xffff),
6807 htab->plt->contents + ent->plt.offset + 0);
6808 bfd_put_32 (output_bfd,
6809 plt_entry[1] | (got_loc & 0xffff),
6810 htab->plt->contents + ent->plt.offset + 4);
6811 }
6812
6813 bfd_put_32 (output_bfd, plt_entry[2],
6814 htab->plt->contents + ent->plt.offset + 8);
6815 bfd_put_32 (output_bfd, plt_entry[3],
6816 htab->plt->contents + ent->plt.offset + 12);
6817
6818 /* This instruction is an immediate load. The value loaded is
6819 the byte offset of the R_PPC_JMP_SLOT relocation from the
6820 start of the .rela.plt section. The value is stored in the
6821 low-order 16 bits of the load instruction. */
6822 /* NOTE: It appears that this is now an index rather than a
6823 prescaled offset. */
6824 bfd_put_32 (output_bfd,
6825 plt_entry[4] | reloc_index,
6826 htab->plt->contents + ent->plt.offset + 16);
6827 /* This instruction is a PC-relative branch whose target is
6828 the start of the PLT section. The address of this branch
6829 instruction is 20 bytes beyond the start of this PLT entry.
6830 The address is encoded in bits 6-29, inclusive. The value
6831 stored is right-shifted by two bits, permitting a 26-bit
6832 offset. */
6833 bfd_put_32 (output_bfd,
6834 (plt_entry[5]
6835 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6836 htab->plt->contents + ent->plt.offset + 20);
6837 bfd_put_32 (output_bfd, plt_entry[6],
6838 htab->plt->contents + ent->plt.offset + 24);
6839 bfd_put_32 (output_bfd, plt_entry[7],
6840 htab->plt->contents + ent->plt.offset + 28);
6841
6842 /* Fill in the GOT entry corresponding to this PLT slot with
6843 the address immediately after the the "bctr" instruction
6844 in this PLT entry. */
6845 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6846 + htab->plt->output_offset
6847 + ent->plt.offset + 16),
6848 htab->sgotplt->contents + got_offset);
6849
6850 if (!info->shared)
6851 {
6852 /* Fill in a couple of entries in .rela.plt.unloaded. */
6853 loc = htab->srelplt2->contents
6854 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6855 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6856 * sizeof (Elf32_External_Rela));
6857
6858 /* Provide the @ha relocation for the first instruction. */
6859 rela.r_offset = (htab->plt->output_section->vma
6860 + htab->plt->output_offset
6861 + ent->plt.offset + 2);
6862 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6863 R_PPC_ADDR16_HA);
6864 rela.r_addend = got_offset;
6865 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6866 loc += sizeof (Elf32_External_Rela);
6867
6868 /* Provide the @l relocation for the second instruction. */
6869 rela.r_offset = (htab->plt->output_section->vma
6870 + htab->plt->output_offset
6871 + ent->plt.offset + 6);
6872 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6873 R_PPC_ADDR16_LO);
6874 rela.r_addend = got_offset;
6875 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6876 loc += sizeof (Elf32_External_Rela);
6877
6878 /* Provide a relocation for the GOT entry corresponding to this
6879 PLT slot. Point it at the middle of the .plt entry. */
6880 rela.r_offset = (htab->sgotplt->output_section->vma
6881 + htab->sgotplt->output_offset
6882 + got_offset);
6883 rela.r_info = ELF32_R_INFO (htab->hplt->indx,
6884 R_PPC_ADDR32);
6885 rela.r_addend = ent->plt.offset + 16;
6886 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6887 }
6888
6889 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6890 In particular, the offset for the relocation is not the
6891 address of the PLT entry for this function, as specified
6892 by the ABI. Instead, the offset is set to the address of
6893 the GOT slot for this function. See EABI 4.4.4.1. */
6894 rela.r_offset = (htab->sgotplt->output_section->vma
6895 + htab->sgotplt->output_offset
6896 + got_offset);
6897
6898 }
6899 else
6900 {
6901 rela.r_offset = (htab->plt->output_section->vma
6902 + htab->plt->output_offset
6903 + ent->plt.offset);
6904 if (htab->old_plt)
6905 {
6906 /* We don't need to fill in the .plt. The ppc dynamic
6907 linker will fill it in. */
6908 }
6909 else
6910 {
6911 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6912 + htab->glink->output_section->vma
6913 + htab->glink->output_offset);
6914 bfd_put_32 (output_bfd, val,
6915 htab->plt->contents + ent->plt.offset);
6916 }
6917 }
6918
6919 /* Fill in the entry in the .rela.plt section. */
6920 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6921 rela.r_addend = 0;
6922
6923 loc = (htab->relplt->contents
6924 + reloc_index * sizeof (Elf32_External_Rela));
6925 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6926
6927 if (!h->def_regular)
6928 {
6929 /* Mark the symbol as undefined, rather than as defined in
6930 the .plt section. Leave the value alone. */
6931 sym->st_shndx = SHN_UNDEF;
6932 /* If the symbol is weak, we do need to clear the value.
6933 Otherwise, the PLT entry would provide a definition for
6934 the symbol even if the symbol wasn't defined anywhere,
6935 and so the symbol would never be NULL. */
6936 if (!h->ref_regular_nonweak)
6937 sym->st_value = 0;
6938 }
6939 doneone = TRUE;
6940 }
6941
6942 if (!htab->old_plt)
6943 {
6944 bfd_vma plt;
6945 unsigned char *p;
6946
6947 plt = (ent->plt.offset
6948 + htab->plt->output_section->vma
6949 + htab->plt->output_offset);
6950 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6951
6952 if (info->shared || info->pie)
6953 {
6954 bfd_vma got = 0;
6955
6956 if (ent->addend >= 32768)
6957 got = (ent->addend
6958 + ent->sec->output_section->vma
6959 + ent->sec->output_offset);
6960 else if (htab->elf.hgot != NULL)
6961 got = (htab->elf.hgot->root.u.def.value
6962 + htab->elf.hgot->root.u.def.section->output_section->vma
6963 + htab->elf.hgot->root.u.def.section->output_offset);
6964
6965 plt -= got;
6966
6967 if (plt + 0x8000 < 0x10000)
6968 {
6969 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6970 p += 4;
6971 bfd_put_32 (output_bfd, MTCTR_11, p);
6972 p += 4;
6973 bfd_put_32 (output_bfd, BCTR, p);
6974 p += 4;
6975 bfd_put_32 (output_bfd, NOP, p);
6976 p += 4;
6977 }
6978 else
6979 {
6980 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6981 p += 4;
6982 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6983 p += 4;
6984 bfd_put_32 (output_bfd, MTCTR_11, p);
6985 p += 4;
6986 bfd_put_32 (output_bfd, BCTR, p);
6987 p += 4;
6988 }
6989 }
6990 else
6991 {
6992 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6993 p += 4;
6994 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6995 p += 4;
6996 bfd_put_32 (output_bfd, MTCTR_11, p);
6997 p += 4;
6998 bfd_put_32 (output_bfd, BCTR, p);
6999 p += 4;
7000
7001 /* We only need one non-PIC glink stub. */
7002 break;
7003 }
7004 }
7005 else
7006 break;
7007 }
7008
7009 if (h->needs_copy)
7010 {
7011 asection *s;
7012 Elf_Internal_Rela rela;
7013 bfd_byte *loc;
7014
7015 /* This symbols needs a copy reloc. Set it up. */
7016
7017 #ifdef DEBUG
7018 fprintf (stderr, ", copy");
7019 #endif
7020
7021 BFD_ASSERT (h->dynindx != -1);
7022
7023 if (ppc_elf_hash_entry (h)->has_sda_refs)
7024 s = htab->relsbss;
7025 else
7026 s = htab->relbss;
7027 BFD_ASSERT (s != NULL);
7028
7029 rela.r_offset = (h->root.u.def.value
7030 + h->root.u.def.section->output_section->vma
7031 + h->root.u.def.section->output_offset);
7032 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
7033 rela.r_addend = 0;
7034 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
7035 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7036 }
7037
7038 #ifdef DEBUG
7039 fprintf (stderr, "\n");
7040 #endif
7041
7042 /* Mark some specially defined symbols as absolute. */
7043 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
7044 || (!htab->is_vxworks
7045 && (h == htab->elf.hgot
7046 || strcmp (h->root.root.string,
7047 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
7048 sym->st_shndx = SHN_ABS;
7049
7050 return TRUE;
7051 }
7052 \f
7053 static enum elf_reloc_type_class
7054 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
7055 {
7056 switch (ELF32_R_TYPE (rela->r_info))
7057 {
7058 case R_PPC_RELATIVE:
7059 return reloc_class_relative;
7060 case R_PPC_REL24:
7061 case R_PPC_ADDR24:
7062 case R_PPC_JMP_SLOT:
7063 return reloc_class_plt;
7064 case R_PPC_COPY:
7065 return reloc_class_copy;
7066 default:
7067 return reloc_class_normal;
7068 }
7069 }
7070 \f
7071 /* Finish up the dynamic sections. */
7072
7073 static bfd_boolean
7074 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
7075 struct bfd_link_info *info)
7076 {
7077 asection *sdyn;
7078 asection *splt;
7079 struct ppc_elf_link_hash_table *htab;
7080 bfd_vma got;
7081 bfd * dynobj;
7082
7083 #ifdef DEBUG
7084 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
7085 #endif
7086
7087 htab = ppc_elf_hash_table (info);
7088 dynobj = elf_hash_table (info)->dynobj;
7089 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
7090 if (htab->is_vxworks)
7091 splt = bfd_get_section_by_name (dynobj, ".plt");
7092 else
7093 splt = NULL;
7094
7095 got = 0;
7096 if (htab->elf.hgot != NULL)
7097 got = (htab->elf.hgot->root.u.def.value
7098 + htab->elf.hgot->root.u.def.section->output_section->vma
7099 + htab->elf.hgot->root.u.def.section->output_offset);
7100
7101 if (htab->elf.dynamic_sections_created)
7102 {
7103 Elf32_External_Dyn *dyncon, *dynconend;
7104
7105 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
7106
7107 dyncon = (Elf32_External_Dyn *) sdyn->contents;
7108 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
7109 for (; dyncon < dynconend; dyncon++)
7110 {
7111 Elf_Internal_Dyn dyn;
7112 asection *s;
7113
7114 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7115
7116 switch (dyn.d_tag)
7117 {
7118 case DT_PLTGOT:
7119 if (htab->is_vxworks)
7120 s = htab->sgotplt;
7121 else
7122 s = htab->plt;
7123 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7124 break;
7125
7126 case DT_PLTRELSZ:
7127 dyn.d_un.d_val = htab->relplt->size;
7128 break;
7129
7130 case DT_JMPREL:
7131 s = htab->relplt;
7132 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7133 break;
7134
7135 case DT_PPC_GOT:
7136 dyn.d_un.d_ptr = got;
7137 break;
7138
7139 case DT_RELASZ:
7140 if (htab->is_vxworks)
7141 {
7142 if (htab->relplt)
7143 dyn.d_un.d_ptr -= htab->relplt->size;
7144 break;
7145 }
7146 continue;
7147
7148 default:
7149 continue;
7150 }
7151
7152 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7153 }
7154 }
7155
7156 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7157 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7158 if (htab->got != NULL)
7159 {
7160 unsigned char *p = htab->got->contents;
7161 bfd_vma val;
7162
7163 p += htab->elf.hgot->root.u.def.value;
7164 if (htab->old_plt && !htab->is_vxworks)
7165 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7166
7167 val = 0;
7168 if (sdyn != NULL)
7169 val = sdyn->output_section->vma + sdyn->output_offset;
7170 bfd_put_32 (output_bfd, val, p);
7171
7172 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7173 }
7174
7175 /* Fill in the first entry in the VxWorks procedure linkage table. */
7176 if (splt && splt->size > 0)
7177 {
7178 /* Use the right PLT. */
7179 static const bfd_vma *plt_entry = NULL;
7180 plt_entry = info->shared ?
7181 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7182
7183 if (!info->shared)
7184 {
7185 bfd_vma got_value =
7186 (htab->elf.hgot->root.u.def.section->output_section->vma
7187 + htab->elf.hgot->root.u.def.section->output_offset
7188 + htab->elf.hgot->root.u.def.value);
7189 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7190
7191 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7192 splt->contents + 0);
7193 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7194 splt->contents + 4);
7195 }
7196 else
7197 {
7198 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7199 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7200 }
7201 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7202 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7203 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7204 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7205 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7206 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7207
7208 if (! info->shared)
7209 {
7210 Elf_Internal_Rela rela;
7211 bfd_byte *loc;
7212
7213 loc = htab->srelplt2->contents;
7214
7215 /* Output the @ha relocation for the first instruction. */
7216 rela.r_offset = (htab->plt->output_section->vma
7217 + htab->plt->output_offset
7218 + 2);
7219 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7220 rela.r_addend = 0;
7221 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7222 loc += sizeof (Elf32_External_Rela);
7223
7224 /* Output the @l relocation for the second instruction. */
7225 rela.r_offset = (htab->plt->output_section->vma
7226 + htab->plt->output_offset
7227 + 6);
7228 rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7229 rela.r_addend = 0;
7230 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7231 loc += sizeof (Elf32_External_Rela);
7232
7233 /* Fix up the remaining relocations. They may have the wrong
7234 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7235 in which symbols were output. */
7236 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7237 {
7238 Elf_Internal_Rela rel;
7239
7240 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7241 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
7242 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7243 loc += sizeof (Elf32_External_Rela);
7244
7245 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7246 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
7247 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7248 loc += sizeof (Elf32_External_Rela);
7249
7250 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7251 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
7252 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7253 loc += sizeof (Elf32_External_Rela);
7254 }
7255 }
7256 }
7257
7258 if (htab->glink != NULL && htab->glink->contents != NULL)
7259 {
7260 unsigned char *p;
7261 unsigned char *endp;
7262 bfd_vma res0;
7263 unsigned int i;
7264
7265 /*
7266 * PIC glink code is the following:
7267 *
7268 * # ith PLT code stub.
7269 * addis 11,30,(plt+(i-1)*4-got)@ha
7270 * lwz 11,(plt+(i-1)*4-got)@l(11)
7271 * mtctr 11
7272 * bctr
7273 *
7274 * # A table of branches, one for each plt entry.
7275 * # The idea is that the plt call stub loads ctr (and r11) with these
7276 * # addresses, so (r11 - res_0) gives the plt index * 4.
7277 * res_0: b PLTresolve
7278 * res_1: b PLTresolve
7279 * .
7280 * # Some number of entries towards the end can be nops
7281 * res_n_m3: nop
7282 * res_n_m2: nop
7283 * res_n_m1:
7284 *
7285 * PLTresolve:
7286 * addis 11,11,(1f-res_0)@ha
7287 * mflr 0
7288 * bcl 20,31,1f
7289 * 1: addi 11,11,(1b-res_0)@l
7290 * mflr 12
7291 * mtlr 0
7292 * sub 11,11,12 # r11 = index * 4
7293 * addis 12,12,(got+4-1b)@ha
7294 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7295 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7296 * mtctr 0
7297 * add 0,11,11
7298 * add 11,0,11 # r11 = index * 12 = reloc offset.
7299 * bctr
7300 */
7301 static const unsigned int pic_plt_resolve[] =
7302 {
7303 ADDIS_11_11,
7304 MFLR_0,
7305 BCL_20_31,
7306 ADDI_11_11,
7307 MFLR_12,
7308 MTLR_0,
7309 SUB_11_11_12,
7310 ADDIS_12_12,
7311 LWZ_0_12,
7312 LWZ_12_12,
7313 MTCTR_0,
7314 ADD_0_11_11,
7315 ADD_11_0_11,
7316 BCTR,
7317 NOP,
7318 NOP
7319 };
7320
7321 static const unsigned int plt_resolve[] =
7322 {
7323 LIS_12,
7324 ADDIS_11_11,
7325 LWZ_0_12,
7326 ADDI_11_11,
7327 MTCTR_0,
7328 ADD_0_11_11,
7329 LWZ_12_12,
7330 ADD_11_0_11,
7331 BCTR,
7332 NOP,
7333 NOP,
7334 NOP,
7335 NOP,
7336 NOP,
7337 NOP,
7338 NOP
7339 };
7340
7341 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7342 abort ();
7343 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7344 abort ();
7345
7346 /* Build the branch table, one for each plt entry (less one),
7347 and perhaps some padding. */
7348 p = htab->glink->contents;
7349 p += htab->glink_pltresolve;
7350 endp = htab->glink->contents;
7351 endp += htab->glink->size - GLINK_PLTRESOLVE;
7352 while (p < endp - 8 * 4)
7353 {
7354 bfd_put_32 (output_bfd, B + endp - p, p);
7355 p += 4;
7356 }
7357 while (p < endp)
7358 {
7359 bfd_put_32 (output_bfd, NOP, p);
7360 p += 4;
7361 }
7362
7363 res0 = (htab->glink_pltresolve
7364 + htab->glink->output_section->vma
7365 + htab->glink->output_offset);
7366
7367 /* Last comes the PLTresolve stub. */
7368 if (info->shared || info->pie)
7369 {
7370 bfd_vma bcl;
7371
7372 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7373 {
7374 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7375 p += 4;
7376 }
7377 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7378
7379 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7380 + htab->glink->output_section->vma
7381 + htab->glink->output_offset);
7382
7383 bfd_put_32 (output_bfd,
7384 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7385 bfd_put_32 (output_bfd,
7386 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7387 bfd_put_32 (output_bfd,
7388 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7389 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7390 {
7391 bfd_put_32 (output_bfd,
7392 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7393 bfd_put_32 (output_bfd,
7394 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7395 }
7396 else
7397 {
7398 bfd_put_32 (output_bfd,
7399 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7400 bfd_put_32 (output_bfd,
7401 LWZ_12_12 + 4, p + 9*4);
7402 }
7403 }
7404 else
7405 {
7406 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7407 {
7408 bfd_put_32 (output_bfd, plt_resolve[i], p);
7409 p += 4;
7410 }
7411 p -= 4 * ARRAY_SIZE (plt_resolve);
7412
7413 bfd_put_32 (output_bfd,
7414 LIS_12 + PPC_HA (got + 4), p + 0*4);
7415 bfd_put_32 (output_bfd,
7416 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7417 bfd_put_32 (output_bfd,
7418 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7419 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7420 {
7421 bfd_put_32 (output_bfd,
7422 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7423 bfd_put_32 (output_bfd,
7424 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7425 }
7426 else
7427 {
7428 bfd_put_32 (output_bfd,
7429 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7430 bfd_put_32 (output_bfd,
7431 LWZ_12_12 + 4, p + 6*4);
7432 }
7433 }
7434 }
7435
7436 return TRUE;
7437 }
7438 \f
7439 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7440 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7441 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7442 #define TARGET_BIG_NAME "elf32-powerpc"
7443 #define ELF_ARCH bfd_arch_powerpc
7444 #define ELF_MACHINE_CODE EM_PPC
7445 #ifdef __QNXTARGET__
7446 #define ELF_MAXPAGESIZE 0x1000
7447 #else
7448 #define ELF_MAXPAGESIZE 0x10000
7449 #endif
7450 #define ELF_MINPAGESIZE 0x1000
7451 #define elf_info_to_howto ppc_elf_info_to_howto
7452
7453 #ifdef EM_CYGNUS_POWERPC
7454 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7455 #endif
7456
7457 #ifdef EM_PPC_OLD
7458 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7459 #endif
7460
7461 #define elf_backend_plt_not_loaded 1
7462 #define elf_backend_can_gc_sections 1
7463 #define elf_backend_can_refcount 1
7464 #define elf_backend_rela_normal 1
7465
7466 #define bfd_elf32_mkobject ppc_elf_mkobject
7467 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7468 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7469 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7470 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7471 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7472
7473 #define elf_backend_object_p ppc_elf_object_p
7474 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7475 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7476 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7477 #define elf_backend_relocate_section ppc_elf_relocate_section
7478 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7479 #define elf_backend_check_relocs ppc_elf_check_relocs
7480 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7481 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7482 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7483 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7484 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7485 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7486 #define elf_backend_fake_sections ppc_elf_fake_sections
7487 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7488 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7489 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7490 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7491 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7492 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7493 #define elf_backend_write_section ppc_elf_write_section
7494 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7495 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7496 #define elf_backend_action_discarded ppc_elf_action_discarded
7497
7498 #include "elf32-target.h"
7499
7500 /* VxWorks Target */
7501
7502 #undef TARGET_LITTLE_SYM
7503 #undef TARGET_LITTLE_NAME
7504
7505 #undef TARGET_BIG_SYM
7506 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7507 #undef TARGET_BIG_NAME
7508 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7509
7510 /* VxWorks uses the elf default section flags for .plt. */
7511 static const struct bfd_elf_special_section *
7512 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7513 {
7514 if (sec->name == NULL)
7515 return NULL;
7516
7517 if (strcmp (sec->name, ".plt") == 0)
7518 return _bfd_elf_get_sec_type_attr (abfd, sec);
7519
7520 return ppc_elf_get_sec_type_attr (abfd, sec);
7521 }
7522
7523 /* Like ppc_elf_link_hash_table_create, but overrides
7524 appropriately for VxWorks. */
7525 static struct bfd_link_hash_table *
7526 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7527 {
7528 struct bfd_link_hash_table *ret;
7529
7530 ret = ppc_elf_link_hash_table_create (abfd);
7531 if (ret)
7532 {
7533 struct ppc_elf_link_hash_table *htab
7534 = (struct ppc_elf_link_hash_table *)ret;
7535 htab->is_vxworks = 1;
7536 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7537 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7538 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7539 }
7540 return ret;
7541 }
7542
7543 /* Tweak magic VxWorks symbols as they are loaded. */
7544 static bfd_boolean
7545 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7546 struct bfd_link_info *info,
7547 Elf_Internal_Sym *sym,
7548 const char **namep ATTRIBUTE_UNUSED,
7549 flagword *flagsp ATTRIBUTE_UNUSED,
7550 asection **secp,
7551 bfd_vma *valp)
7552 {
7553 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7554 valp))
7555 return FALSE;
7556
7557 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7558 }
7559
7560 /* Tweak magic VxWorks symbols as they are written to the output file. */
7561 static bfd_boolean
7562 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7563 ATTRIBUTE_UNUSED,
7564 const char *name,
7565 Elf_Internal_Sym *sym,
7566 asection *input_sec ATTRIBUTE_UNUSED,
7567 struct elf_link_hash_entry *h
7568 ATTRIBUTE_UNUSED)
7569 {
7570 /* Ignore the first dummy symbol. */
7571 if (!name)
7572 return TRUE;
7573
7574 return elf_vxworks_link_output_symbol_hook (name, sym);
7575 }
7576
7577 static void
7578 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7579 {
7580 ppc_elf_final_write_processing(abfd, linker);
7581 elf_vxworks_final_write_processing(abfd, linker);
7582 }
7583
7584 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7585 define it. */
7586 #undef elf_backend_want_plt_sym
7587 #define elf_backend_want_plt_sym 1
7588 #undef elf_backend_want_got_plt
7589 #define elf_backend_want_got_plt 1
7590 #undef elf_backend_got_symbol_offset
7591 #define elf_backend_got_symbol_offset 0
7592 #undef elf_backend_plt_not_loaded
7593 #define elf_backend_plt_not_loaded 0
7594 #undef elf_backend_plt_readonly
7595 #define elf_backend_plt_readonly 1
7596 #undef elf_backend_got_header_size
7597 #define elf_backend_got_header_size 12
7598
7599 #undef bfd_elf32_bfd_link_hash_table_create
7600 #define bfd_elf32_bfd_link_hash_table_create \
7601 ppc_elf_vxworks_link_hash_table_create
7602 #undef elf_backend_add_symbol_hook
7603 #define elf_backend_add_symbol_hook \
7604 ppc_elf_vxworks_add_symbol_hook
7605 #undef elf_backend_link_output_symbol_hook
7606 #define elf_backend_link_output_symbol_hook \
7607 elf_i386_vxworks_link_output_symbol_hook
7608 #undef elf_backend_final_write_processing
7609 #define elf_backend_final_write_processing \
7610 ppc_elf_vxworks_final_write_processing
7611 #undef elf_backend_get_sec_type_attr
7612 #define elf_backend_get_sec_type_attr \
7613 ppc_elf_vxworks_get_sec_type_attr
7614 #undef elf_backend_emit_relocs
7615 #define elf_backend_emit_relocs \
7616 elf_vxworks_emit_relocs
7617
7618 #undef elf32_bed
7619 #define elf32_bed ppc_elf_vxworks_bed
7620
7621 #include "elf32-target.h"