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* elf32-ppc.c (ppc_elf_size_dynamic_sections): Correct value of
[deliverable/binutils-gdb.git] / bfd / elf32-ppc.c
1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005 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 /* Value of symbol. */
1672 bfd_vma sym_val;
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_EXCLUDE) != 0)
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 /* Small local sym to section mapping cache. */
2357 struct sym_sec_cache sym_sec;
2358
2359 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2360 asection *srelplt2;
2361
2362 /* The .got.plt section (VxWorks only)*/
2363 asection *sgotplt;
2364
2365 /* Short-cuts to frequently used symbols on VxWorks targets. */
2366 struct elf_link_hash_entry *hgot, *hplt;
2367
2368 /* True if the target system is VxWorks. */
2369 int is_vxworks;
2370
2371 /* The size of PLT entries. */
2372 int plt_entry_size;
2373 /* The distance between adjacent PLT slots. */
2374 int plt_slot_size;
2375 /* The size of the first PLT entry. */
2376 int plt_initial_entry_size;
2377 };
2378
2379 /* Get the PPC ELF linker hash table from a link_info structure. */
2380
2381 #define ppc_elf_hash_table(p) \
2382 ((struct ppc_elf_link_hash_table *) (p)->hash)
2383
2384 /* Create an entry in a PPC ELF linker hash table. */
2385
2386 static struct bfd_hash_entry *
2387 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2388 struct bfd_hash_table *table,
2389 const char *string)
2390 {
2391 /* Allocate the structure if it has not already been allocated by a
2392 subclass. */
2393 if (entry == NULL)
2394 {
2395 entry = bfd_hash_allocate (table,
2396 sizeof (struct ppc_elf_link_hash_entry));
2397 if (entry == NULL)
2398 return entry;
2399 }
2400
2401 /* Call the allocation method of the superclass. */
2402 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2403 if (entry != NULL)
2404 {
2405 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2406 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2407 ppc_elf_hash_entry (entry)->tls_mask = 0;
2408 }
2409
2410 return entry;
2411 }
2412
2413 /* Create a PPC ELF linker hash table. */
2414
2415 static struct bfd_link_hash_table *
2416 ppc_elf_link_hash_table_create (bfd *abfd)
2417 {
2418 struct ppc_elf_link_hash_table *ret;
2419
2420 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2421 if (ret == NULL)
2422 return NULL;
2423
2424 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2425 ppc_elf_link_hash_newfunc))
2426 {
2427 free (ret);
2428 return NULL;
2429 }
2430
2431 ret->elf.init_plt_refcount.refcount = 0;
2432 ret->elf.init_plt_refcount.glist = NULL;
2433 ret->elf.init_plt_offset.offset = 0;
2434 ret->elf.init_plt_offset.glist = NULL;
2435
2436 ret->sdata[0].name = ".sdata";
2437 ret->sdata[0].sym_name = "_SDA_BASE_";
2438 ret->sdata[0].bss_name = ".sbss";
2439
2440 ret->sdata[1].name = ".sdata2";
2441 ret->sdata[1].sym_name = "_SDA2_BASE_";
2442 ret->sdata[1].bss_name = ".sbss2";
2443
2444 ret->plt_entry_size = 12;
2445 ret->plt_slot_size = 8;
2446 ret->plt_initial_entry_size = 72;
2447
2448 ret->is_vxworks = 0;
2449
2450 return &ret->elf.root;
2451 }
2452
2453 /* Create .got and the related sections. */
2454
2455 static bfd_boolean
2456 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2457 {
2458 struct ppc_elf_link_hash_table *htab;
2459 asection *s;
2460 flagword flags;
2461
2462 if (!_bfd_elf_create_got_section (abfd, info))
2463 return FALSE;
2464
2465 htab = ppc_elf_hash_table (info);
2466 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2467 if (s == NULL)
2468 abort ();
2469
2470 if (htab->is_vxworks)
2471 {
2472 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2473 if (!htab->sgotplt)
2474 abort ();
2475 }
2476 else
2477 {
2478 /* The powerpc .got has a blrl instruction in it. Mark it
2479 executable. */
2480 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2481 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2482 if (!bfd_set_section_flags (abfd, s, flags))
2483 return FALSE;
2484 }
2485
2486 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2487 | SEC_LINKER_CREATED | SEC_READONLY);
2488 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2489 if (!htab->relgot
2490 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2491 return FALSE;
2492
2493 return TRUE;
2494 }
2495
2496 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2497 to output sections (just like _bfd_elf_create_dynamic_sections has
2498 to create .dynbss and .rela.bss). */
2499
2500 static bfd_boolean
2501 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2502 {
2503 struct ppc_elf_link_hash_table *htab;
2504 asection *s;
2505 flagword flags;
2506
2507 htab = ppc_elf_hash_table (info);
2508
2509 if (htab->got == NULL
2510 && !ppc_elf_create_got (abfd, info))
2511 return FALSE;
2512
2513 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2514 return FALSE;
2515
2516 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2517 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2518
2519 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2520 htab->glink = s;
2521 if (s == NULL
2522 || !bfd_set_section_alignment (abfd, s, 4))
2523 return FALSE;
2524
2525 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2526 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2527 SEC_ALLOC | SEC_LINKER_CREATED);
2528 htab->dynsbss = s;
2529 if (s == NULL)
2530 return FALSE;
2531
2532 if (! info->shared)
2533 {
2534 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2535 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2536 htab->relsbss = s;
2537 if (s == NULL
2538 || ! bfd_set_section_alignment (abfd, s, 2))
2539 return FALSE;
2540 }
2541
2542 /* Create the section for VxWorks static plt relocations. */
2543 if (htab->is_vxworks && !info->shared)
2544 {
2545 s = bfd_make_section (abfd, ".rela.plt.unloaded");
2546 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
2547 | SEC_LINKER_CREATED);
2548 if (s == NULL
2549 || ! bfd_set_section_flags (abfd, s, flags)
2550 || ! bfd_set_section_alignment (abfd, s,
2551 get_elf_backend_data (abfd)->s->log_file_align))
2552 return FALSE;
2553 htab->srelplt2 = s;
2554 }
2555
2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2558 if (s == NULL)
2559 abort ();
2560
2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2562 return bfd_set_section_flags (abfd, s, flags);
2563 }
2564
2565 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2566
2567 static void
2568 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
2569 struct elf_link_hash_entry *dir,
2570 struct elf_link_hash_entry *ind)
2571 {
2572 struct ppc_elf_link_hash_entry *edir, *eind;
2573 bfd_signed_vma tmp;
2574
2575 edir = (struct ppc_elf_link_hash_entry *) dir;
2576 eind = (struct ppc_elf_link_hash_entry *) ind;
2577
2578 if (eind->dyn_relocs != NULL)
2579 {
2580 if (edir->dyn_relocs != NULL)
2581 {
2582 struct ppc_elf_dyn_relocs **pp;
2583 struct ppc_elf_dyn_relocs *p;
2584
2585 if (ind->root.type == bfd_link_hash_indirect)
2586 abort ();
2587
2588 /* Add reloc counts against the weak sym to the strong sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2591 {
2592 struct ppc_elf_dyn_relocs *q;
2593
2594 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2595 if (q->sec == p->sec)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->dyn_relocs;
2606 }
2607
2608 edir->dyn_relocs = eind->dyn_relocs;
2609 eind->dyn_relocs = NULL;
2610 }
2611
2612 edir->tls_mask |= eind->tls_mask;
2613 edir->has_sda_refs |= eind->has_sda_refs;
2614
2615 /* If called to transfer flags for a weakdef during processing
2616 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2617 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2618 if (!(ELIMINATE_COPY_RELOCS
2619 && eind->elf.root.type != bfd_link_hash_indirect
2620 && edir->elf.dynamic_adjusted))
2621 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2622
2623 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2624 edir->elf.ref_regular |= eind->elf.ref_regular;
2625 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2626 edir->elf.needs_plt |= eind->elf.needs_plt;
2627
2628 /* If we were called to copy over info for a weak sym, that's all. */
2629 if (eind->elf.root.type != bfd_link_hash_indirect)
2630 return;
2631
2632 /* Copy over the GOT refcount entries that we may have already seen to
2633 the symbol which just became indirect. */
2634 tmp = edir->elf.got.refcount;
2635 if (tmp < 1)
2636 {
2637 edir->elf.got.refcount = eind->elf.got.refcount;
2638 eind->elf.got.refcount = tmp;
2639 }
2640 else
2641 BFD_ASSERT (eind->elf.got.refcount < 1);
2642
2643 /* And plt entries. */
2644 if (eind->elf.plt.plist != NULL)
2645 {
2646 if (edir->elf.plt.plist != NULL)
2647 {
2648 struct plt_entry **entp;
2649 struct plt_entry *ent;
2650
2651 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2652 {
2653 struct plt_entry *dent;
2654
2655 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2656 if (dent->sec == ent->sec && dent->addend == ent->addend)
2657 {
2658 dent->plt.refcount += ent->plt.refcount;
2659 *entp = ent->next;
2660 break;
2661 }
2662 if (dent == NULL)
2663 entp = &ent->next;
2664 }
2665 *entp = edir->elf.plt.plist;
2666 }
2667
2668 edir->elf.plt.plist = eind->elf.plt.plist;
2669 eind->elf.plt.plist = NULL;
2670 }
2671
2672 if (edir->elf.dynindx == -1)
2673 {
2674 edir->elf.dynindx = eind->elf.dynindx;
2675 edir->elf.dynstr_index = eind->elf.dynstr_index;
2676 eind->elf.dynindx = -1;
2677 eind->elf.dynstr_index = 0;
2678 }
2679 else
2680 BFD_ASSERT (eind->elf.dynindx == -1);
2681 }
2682
2683 /* Return 1 if target is one of ours. */
2684
2685 static bfd_boolean
2686 is_ppc_elf_target (const struct bfd_target *targ)
2687 {
2688 extern const bfd_target bfd_elf32_powerpc_vec;
2689 extern const bfd_target bfd_elf32_powerpcle_vec;
2690
2691 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2692 }
2693
2694 /* Hook called by the linker routine which adds symbols from an object
2695 file. We use it to put .comm items in .sbss, and not .bss. */
2696
2697 static bfd_boolean
2698 ppc_elf_add_symbol_hook (bfd *abfd,
2699 struct bfd_link_info *info,
2700 Elf_Internal_Sym *sym,
2701 const char **namep ATTRIBUTE_UNUSED,
2702 flagword *flagsp ATTRIBUTE_UNUSED,
2703 asection **secp,
2704 bfd_vma *valp)
2705 {
2706 if (sym->st_shndx == SHN_COMMON
2707 && !info->relocatable
2708 && sym->st_size <= elf_gp_size (abfd)
2709 && is_ppc_elf_target (info->hash->creator))
2710 {
2711 /* Common symbols less than or equal to -G nn bytes are automatically
2712 put into .sbss. */
2713 struct ppc_elf_link_hash_table *htab;
2714
2715 htab = ppc_elf_hash_table (info);
2716 if (htab->sbss == NULL)
2717 {
2718 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2719
2720 if (!htab->elf.dynobj)
2721 htab->elf.dynobj = abfd;
2722
2723 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2724 ".sbss",
2725 flags);
2726 if (htab->sbss == NULL)
2727 return FALSE;
2728 }
2729
2730 *secp = htab->sbss;
2731 *valp = sym->st_size;
2732 }
2733
2734 return TRUE;
2735 }
2736 \f
2737 /* Create a special linker section. */
2738
2739 static bfd_boolean
2740 ppc_elf_create_linker_section (bfd *abfd,
2741 struct bfd_link_info *info,
2742 flagword flags,
2743 elf_linker_section_t *lsect)
2744 {
2745 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2746 asection *s;
2747
2748 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2749 | SEC_LINKER_CREATED);
2750
2751 /* Record the first bfd that needs the special sections. */
2752 if (!htab->elf.dynobj)
2753 htab->elf.dynobj = abfd;
2754
2755 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2756 lsect->name,
2757 flags);
2758 if (s == NULL
2759 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2760 return FALSE;
2761 lsect->section = s;
2762
2763 return TRUE;
2764 }
2765
2766 /* Find a linker generated pointer with a given addend and type. */
2767
2768 static elf_linker_section_pointers_t *
2769 elf_find_pointer_linker_section
2770 (elf_linker_section_pointers_t *linker_pointers,
2771 bfd_vma addend,
2772 elf_linker_section_t *lsect)
2773 {
2774 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2775 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2776 return linker_pointers;
2777
2778 return NULL;
2779 }
2780
2781 /* Allocate a pointer to live in a linker created section. */
2782
2783 static bfd_boolean
2784 elf_create_pointer_linker_section (bfd *abfd,
2785 elf_linker_section_t *lsect,
2786 struct elf_link_hash_entry *h,
2787 const Elf_Internal_Rela *rel)
2788 {
2789 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2790 elf_linker_section_pointers_t *linker_section_ptr;
2791 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2792 bfd_size_type amt;
2793
2794 BFD_ASSERT (lsect != NULL);
2795
2796 /* Is this a global symbol? */
2797 if (h != NULL)
2798 {
2799 struct ppc_elf_link_hash_entry *eh;
2800
2801 /* Has this symbol already been allocated? If so, our work is done. */
2802 eh = (struct ppc_elf_link_hash_entry *) h;
2803 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2804 rel->r_addend,
2805 lsect))
2806 return TRUE;
2807
2808 ptr_linker_section_ptr = &eh->linker_section_pointer;
2809 }
2810 else
2811 {
2812 /* Allocation of a pointer to a local symbol. */
2813 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2814
2815 /* Allocate a table to hold the local symbols if first time. */
2816 if (!ptr)
2817 {
2818 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2819
2820 amt = num_symbols;
2821 amt *= sizeof (elf_linker_section_pointers_t *);
2822 ptr = bfd_zalloc (abfd, amt);
2823
2824 if (!ptr)
2825 return FALSE;
2826
2827 elf_local_ptr_offsets (abfd) = ptr;
2828 }
2829
2830 /* Has this symbol already been allocated? If so, our work is done. */
2831 if (elf_find_pointer_linker_section (ptr[r_symndx],
2832 rel->r_addend,
2833 lsect))
2834 return TRUE;
2835
2836 ptr_linker_section_ptr = &ptr[r_symndx];
2837 }
2838
2839 /* Allocate space for a pointer in the linker section, and allocate
2840 a new pointer record from internal memory. */
2841 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2842 amt = sizeof (elf_linker_section_pointers_t);
2843 linker_section_ptr = bfd_alloc (abfd, amt);
2844
2845 if (!linker_section_ptr)
2846 return FALSE;
2847
2848 linker_section_ptr->next = *ptr_linker_section_ptr;
2849 linker_section_ptr->addend = rel->r_addend;
2850 linker_section_ptr->lsect = lsect;
2851 *ptr_linker_section_ptr = linker_section_ptr;
2852
2853 linker_section_ptr->offset = lsect->section->size;
2854 lsect->section->size += 4;
2855
2856 #ifdef DEBUG
2857 fprintf (stderr,
2858 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2859 lsect->name, (long) linker_section_ptr->offset,
2860 (long) lsect->section->size);
2861 #endif
2862
2863 return TRUE;
2864 }
2865
2866 static bfd_boolean
2867 update_local_sym_info (bfd *abfd,
2868 Elf_Internal_Shdr *symtab_hdr,
2869 unsigned long r_symndx,
2870 int tls_type)
2871 {
2872 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2873 char *local_got_tls_masks;
2874
2875 if (local_got_refcounts == NULL)
2876 {
2877 bfd_size_type size = symtab_hdr->sh_info;
2878
2879 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2880 local_got_refcounts = bfd_zalloc (abfd, size);
2881 if (local_got_refcounts == NULL)
2882 return FALSE;
2883 elf_local_got_refcounts (abfd) = local_got_refcounts;
2884 }
2885
2886 local_got_refcounts[r_symndx] += 1;
2887 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2888 local_got_tls_masks[r_symndx] |= tls_type;
2889 return TRUE;
2890 }
2891
2892 static bfd_boolean
2893 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2894 asection *sec, bfd_vma addend)
2895 {
2896 struct plt_entry *ent;
2897
2898 if (addend < 32768)
2899 sec = NULL;
2900 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2901 if (ent->sec == sec && ent->addend == addend)
2902 break;
2903 if (ent == NULL)
2904 {
2905 bfd_size_type amt = sizeof (*ent);
2906 ent = bfd_alloc (abfd, amt);
2907 if (ent == NULL)
2908 return FALSE;
2909 ent->next = h->plt.plist;
2910 ent->sec = sec;
2911 ent->addend = addend;
2912 ent->plt.refcount = 0;
2913 h->plt.plist = ent;
2914 }
2915 ent->plt.refcount += 1;
2916 return TRUE;
2917 }
2918
2919 static struct plt_entry *
2920 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2921 {
2922 struct plt_entry *ent;
2923
2924 if (addend < 32768)
2925 sec = NULL;
2926 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2927 if (ent->sec == sec && ent->addend == addend)
2928 break;
2929 return ent;
2930 }
2931
2932 static void
2933 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2934 {
2935 (*_bfd_error_handler)
2936 (_("%B: relocation %s cannot be used when making a shared object"),
2937 abfd,
2938 ppc_elf_howto_table[r_type]->name);
2939 bfd_set_error (bfd_error_bad_value);
2940 }
2941
2942 /* Look through the relocs for a section during the first phase, and
2943 allocate space in the global offset table or procedure linkage
2944 table. */
2945
2946 static bfd_boolean
2947 ppc_elf_check_relocs (bfd *abfd,
2948 struct bfd_link_info *info,
2949 asection *sec,
2950 const Elf_Internal_Rela *relocs)
2951 {
2952 struct ppc_elf_link_hash_table *htab;
2953 Elf_Internal_Shdr *symtab_hdr;
2954 struct elf_link_hash_entry **sym_hashes;
2955 const Elf_Internal_Rela *rel;
2956 const Elf_Internal_Rela *rel_end;
2957 asection *got2, *sreloc;
2958
2959 if (info->relocatable)
2960 return TRUE;
2961
2962 /* Don't do anything special with non-loaded, non-alloced sections.
2963 In particular, any relocs in such sections should not affect GOT
2964 and PLT reference counting (ie. we don't allow them to create GOT
2965 or PLT entries), there's no possibility or desire to optimize TLS
2966 relocs, and there's not much point in propagating relocs to shared
2967 libs that the dynamic linker won't relocate. */
2968 if ((sec->flags & SEC_ALLOC) == 0)
2969 return TRUE;
2970
2971 #ifdef DEBUG
2972 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2973 sec, abfd);
2974 #endif
2975
2976 /* Initialize howto table if not already done. */
2977 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2978 ppc_elf_howto_init ();
2979
2980 htab = ppc_elf_hash_table (info);
2981 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2982 sym_hashes = elf_sym_hashes (abfd);
2983 got2 = bfd_get_section_by_name (abfd, ".got2");
2984 sreloc = NULL;
2985
2986 rel_end = relocs + sec->reloc_count;
2987 for (rel = relocs; rel < rel_end; rel++)
2988 {
2989 unsigned long r_symndx;
2990 enum elf_ppc_reloc_type r_type;
2991 struct elf_link_hash_entry *h;
2992 int tls_type = 0;
2993
2994 r_symndx = ELF32_R_SYM (rel->r_info);
2995 if (r_symndx < symtab_hdr->sh_info)
2996 h = NULL;
2997 else
2998 {
2999 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3000 while (h->root.type == bfd_link_hash_indirect
3001 || h->root.type == bfd_link_hash_warning)
3002 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3003 }
3004
3005 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3006 This shows up in particular in an R_PPC_ADDR32 in the eabi
3007 startup code. */
3008 if (h != NULL
3009 && htab->got == NULL
3010 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3011 {
3012 if (htab->elf.dynobj == NULL)
3013 htab->elf.dynobj = abfd;
3014 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3015 return FALSE;
3016 BFD_ASSERT (h == htab->elf.hgot);
3017 }
3018
3019 r_type = ELF32_R_TYPE (rel->r_info);
3020 switch (r_type)
3021 {
3022 case R_PPC_GOT_TLSLD16:
3023 case R_PPC_GOT_TLSLD16_LO:
3024 case R_PPC_GOT_TLSLD16_HI:
3025 case R_PPC_GOT_TLSLD16_HA:
3026 htab->tlsld_got.refcount += 1;
3027 tls_type = TLS_TLS | TLS_LD;
3028 goto dogottls;
3029
3030 case R_PPC_GOT_TLSGD16:
3031 case R_PPC_GOT_TLSGD16_LO:
3032 case R_PPC_GOT_TLSGD16_HI:
3033 case R_PPC_GOT_TLSGD16_HA:
3034 tls_type = TLS_TLS | TLS_GD;
3035 goto dogottls;
3036
3037 case R_PPC_GOT_TPREL16:
3038 case R_PPC_GOT_TPREL16_LO:
3039 case R_PPC_GOT_TPREL16_HI:
3040 case R_PPC_GOT_TPREL16_HA:
3041 if (info->shared)
3042 info->flags |= DF_STATIC_TLS;
3043 tls_type = TLS_TLS | TLS_TPREL;
3044 goto dogottls;
3045
3046 case R_PPC_GOT_DTPREL16:
3047 case R_PPC_GOT_DTPREL16_LO:
3048 case R_PPC_GOT_DTPREL16_HI:
3049 case R_PPC_GOT_DTPREL16_HA:
3050 tls_type = TLS_TLS | TLS_DTPREL;
3051 dogottls:
3052 sec->has_tls_reloc = 1;
3053 /* Fall thru */
3054
3055 /* GOT16 relocations */
3056 case R_PPC_GOT16:
3057 case R_PPC_GOT16_LO:
3058 case R_PPC_GOT16_HI:
3059 case R_PPC_GOT16_HA:
3060 /* This symbol requires a global offset table entry. */
3061 if (htab->got == NULL)
3062 {
3063 if (htab->elf.dynobj == NULL)
3064 htab->elf.dynobj = abfd;
3065 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3066 return FALSE;
3067 }
3068 if (h != NULL)
3069 {
3070 h->got.refcount += 1;
3071 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3072 }
3073 else
3074 /* This is a global offset table entry for a local symbol. */
3075 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3076 return FALSE;
3077 break;
3078
3079 /* Indirect .sdata relocation. */
3080 case R_PPC_EMB_SDAI16:
3081 if (info->shared)
3082 {
3083 bad_shared_reloc (abfd, r_type);
3084 return FALSE;
3085 }
3086 if (htab->sdata[0].section == NULL
3087 && !ppc_elf_create_linker_section (abfd, info, 0,
3088 &htab->sdata[0]))
3089 return FALSE;
3090 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3091 h, rel))
3092 return FALSE;
3093 break;
3094
3095 /* Indirect .sdata2 relocation. */
3096 case R_PPC_EMB_SDA2I16:
3097 if (info->shared)
3098 {
3099 bad_shared_reloc (abfd, r_type);
3100 return FALSE;
3101 }
3102 if (htab->sdata[1].section == NULL
3103 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3104 &htab->sdata[1]))
3105 return FALSE;
3106 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3107 h, rel))
3108 return FALSE;
3109 break;
3110
3111 case R_PPC_SDAREL16:
3112 case R_PPC_EMB_SDA2REL:
3113 case R_PPC_EMB_SDA21:
3114 case R_PPC_EMB_RELSDA:
3115 case R_PPC_EMB_NADDR32:
3116 case R_PPC_EMB_NADDR16:
3117 case R_PPC_EMB_NADDR16_LO:
3118 case R_PPC_EMB_NADDR16_HI:
3119 case R_PPC_EMB_NADDR16_HA:
3120 if (info->shared)
3121 {
3122 bad_shared_reloc (abfd, r_type);
3123 return FALSE;
3124 }
3125 if (h != NULL)
3126 {
3127 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3128 /* We may need a copy reloc. */
3129 h->non_got_ref = TRUE;
3130 }
3131 break;
3132
3133 case R_PPC_PLT32:
3134 case R_PPC_PLTREL24:
3135 case R_PPC_PLTREL32:
3136 case R_PPC_PLT16_LO:
3137 case R_PPC_PLT16_HI:
3138 case R_PPC_PLT16_HA:
3139 #ifdef DEBUG
3140 fprintf (stderr, "Reloc requires a PLT entry\n");
3141 #endif
3142 /* This symbol requires a procedure linkage table entry. We
3143 actually build the entry in finish_dynamic_symbol,
3144 because this might be a case of linking PIC code without
3145 linking in any dynamic objects, in which case we don't
3146 need to generate a procedure linkage table after all. */
3147
3148 if (h == NULL)
3149 {
3150 /* It does not make sense to have a procedure linkage
3151 table entry for a local symbol. */
3152 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3153 "local symbol"),
3154 abfd,
3155 sec,
3156 (long) rel->r_offset,
3157 ppc_elf_howto_table[r_type]->name);
3158 bfd_set_error (bfd_error_bad_value);
3159 return FALSE;
3160 }
3161 else
3162 {
3163 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3164
3165 h->needs_plt = 1;
3166 if (!update_plt_info (abfd, h, got2, addend))
3167 return FALSE;
3168 }
3169 break;
3170
3171 /* The following relocations don't need to propagate the
3172 relocation if linking a shared object since they are
3173 section relative. */
3174 case R_PPC_SECTOFF:
3175 case R_PPC_SECTOFF_LO:
3176 case R_PPC_SECTOFF_HI:
3177 case R_PPC_SECTOFF_HA:
3178 case R_PPC_DTPREL16:
3179 case R_PPC_DTPREL16_LO:
3180 case R_PPC_DTPREL16_HI:
3181 case R_PPC_DTPREL16_HA:
3182 case R_PPC_TOC16:
3183 break;
3184
3185 case R_PPC_REL16:
3186 case R_PPC_REL16_LO:
3187 case R_PPC_REL16_HI:
3188 case R_PPC_REL16_HA:
3189 htab->new_plt = 1;
3190 break;
3191
3192 /* These are just markers. */
3193 case R_PPC_TLS:
3194 case R_PPC_EMB_MRKREF:
3195 case R_PPC_NONE:
3196 case R_PPC_max:
3197 break;
3198
3199 /* These should only appear in dynamic objects. */
3200 case R_PPC_COPY:
3201 case R_PPC_GLOB_DAT:
3202 case R_PPC_JMP_SLOT:
3203 case R_PPC_RELATIVE:
3204 break;
3205
3206 /* These aren't handled yet. We'll report an error later. */
3207 case R_PPC_ADDR30:
3208 case R_PPC_EMB_RELSEC16:
3209 case R_PPC_EMB_RELST_LO:
3210 case R_PPC_EMB_RELST_HI:
3211 case R_PPC_EMB_RELST_HA:
3212 case R_PPC_EMB_BIT_FLD:
3213 break;
3214
3215 /* This refers only to functions defined in the shared library. */
3216 case R_PPC_LOCAL24PC:
3217 if (h && h == htab->elf.hgot)
3218 htab->old_plt = 1;
3219 break;
3220
3221 /* This relocation describes the C++ object vtable hierarchy.
3222 Reconstruct it for later use during GC. */
3223 case R_PPC_GNU_VTINHERIT:
3224 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3225 return FALSE;
3226 break;
3227
3228 /* This relocation describes which C++ vtable entries are actually
3229 used. Record for later use during GC. */
3230 case R_PPC_GNU_VTENTRY:
3231 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3232 return FALSE;
3233 break;
3234
3235 /* We shouldn't really be seeing these. */
3236 case R_PPC_TPREL32:
3237 if (info->shared)
3238 info->flags |= DF_STATIC_TLS;
3239 goto dodyn;
3240
3241 /* Nor these. */
3242 case R_PPC_DTPMOD32:
3243 case R_PPC_DTPREL32:
3244 goto dodyn;
3245
3246 case R_PPC_TPREL16:
3247 case R_PPC_TPREL16_LO:
3248 case R_PPC_TPREL16_HI:
3249 case R_PPC_TPREL16_HA:
3250 if (info->shared)
3251 info->flags |= DF_STATIC_TLS;
3252 goto dodyn;
3253
3254 case R_PPC_REL32:
3255 if (h == NULL
3256 && got2 != NULL
3257 && (sec->flags & SEC_CODE) != 0
3258 && (info->shared || info->pie)
3259 && !htab->old_plt)
3260 {
3261 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3262 the start of a function, which assembles to a REL32
3263 reference to .got2. If we detect one of these, then
3264 force the old PLT layout because the linker cannot
3265 reliably deduce the GOT pointer value needed for
3266 PLT call stubs. */
3267 asection *s;
3268
3269 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3270 r_symndx);
3271 if (s == got2)
3272 htab->old_plt = 1;
3273 }
3274 /* fall through */
3275
3276 case R_PPC_REL24:
3277 case R_PPC_REL14:
3278 case R_PPC_REL14_BRTAKEN:
3279 case R_PPC_REL14_BRNTAKEN:
3280 if (h == NULL)
3281 break;
3282 if (h == htab->elf.hgot)
3283 {
3284 htab->old_plt = 1;
3285 break;
3286 }
3287 /* fall through */
3288
3289 case R_PPC_ADDR32:
3290 case R_PPC_ADDR24:
3291 case R_PPC_ADDR16:
3292 case R_PPC_ADDR16_LO:
3293 case R_PPC_ADDR16_HI:
3294 case R_PPC_ADDR16_HA:
3295 case R_PPC_ADDR14:
3296 case R_PPC_ADDR14_BRTAKEN:
3297 case R_PPC_ADDR14_BRNTAKEN:
3298 case R_PPC_UADDR32:
3299 case R_PPC_UADDR16:
3300 if (h != NULL && !info->shared)
3301 {
3302 /* We may need a plt entry if the symbol turns out to be
3303 a function defined in a dynamic object. */
3304 if (!update_plt_info (abfd, h, NULL, 0))
3305 return FALSE;
3306
3307 /* We may need a copy reloc too. */
3308 h->non_got_ref = 1;
3309 }
3310
3311 dodyn:
3312 /* If we are creating a shared library, and this is a reloc
3313 against a global symbol, or a non PC relative reloc
3314 against a local symbol, then we need to copy the reloc
3315 into the shared library. However, if we are linking with
3316 -Bsymbolic, we do not need to copy a reloc against a
3317 global symbol which is defined in an object we are
3318 including in the link (i.e., DEF_REGULAR is set). At
3319 this point we have not seen all the input files, so it is
3320 possible that DEF_REGULAR is not set now but will be set
3321 later (it is never cleared). In case of a weak definition,
3322 DEF_REGULAR may be cleared later by a strong definition in
3323 a shared library. We account for that possibility below by
3324 storing information in the dyn_relocs field of the hash
3325 table entry. A similar situation occurs when creating
3326 shared libraries and symbol visibility changes render the
3327 symbol local.
3328
3329 If on the other hand, we are creating an executable, we
3330 may need to keep relocations for symbols satisfied by a
3331 dynamic library if we manage to avoid copy relocs for the
3332 symbol. */
3333 if ((info->shared
3334 && (MUST_BE_DYN_RELOC (r_type)
3335 || (h != NULL
3336 && (! info->symbolic
3337 || h->root.type == bfd_link_hash_defweak
3338 || !h->def_regular))))
3339 || (ELIMINATE_COPY_RELOCS
3340 && !info->shared
3341 && h != NULL
3342 && (h->root.type == bfd_link_hash_defweak
3343 || !h->def_regular)))
3344 {
3345 struct ppc_elf_dyn_relocs *p;
3346 struct ppc_elf_dyn_relocs **head;
3347
3348 #ifdef DEBUG
3349 fprintf (stderr,
3350 "ppc_elf_check_relocs needs to "
3351 "create relocation for %s\n",
3352 (h && h->root.root.string
3353 ? h->root.root.string : "<unknown>"));
3354 #endif
3355 if (sreloc == NULL)
3356 {
3357 const char *name;
3358
3359 name = (bfd_elf_string_from_elf_section
3360 (abfd,
3361 elf_elfheader (abfd)->e_shstrndx,
3362 elf_section_data (sec)->rel_hdr.sh_name));
3363 if (name == NULL)
3364 return FALSE;
3365
3366 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3367 && strcmp (bfd_get_section_name (abfd, sec),
3368 name + 5) == 0);
3369
3370 if (htab->elf.dynobj == NULL)
3371 htab->elf.dynobj = abfd;
3372 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3373 if (sreloc == NULL)
3374 {
3375 flagword flags;
3376
3377 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3378 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3379 | SEC_ALLOC | SEC_LOAD);
3380 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3381 name,
3382 flags);
3383 if (sreloc == NULL
3384 || ! bfd_set_section_alignment (htab->elf.dynobj,
3385 sreloc, 2))
3386 return FALSE;
3387 }
3388 elf_section_data (sec)->sreloc = sreloc;
3389 }
3390
3391 /* If this is a global symbol, we count the number of
3392 relocations we need for this symbol. */
3393 if (h != NULL)
3394 {
3395 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3396 }
3397 else
3398 {
3399 /* Track dynamic relocs needed for local syms too.
3400 We really need local syms available to do this
3401 easily. Oh well. */
3402
3403 asection *s;
3404 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3405 sec, r_symndx);
3406 if (s == NULL)
3407 return FALSE;
3408
3409 head = ((struct ppc_elf_dyn_relocs **)
3410 &elf_section_data (s)->local_dynrel);
3411 }
3412
3413 p = *head;
3414 if (p == NULL || p->sec != sec)
3415 {
3416 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3417 if (p == NULL)
3418 return FALSE;
3419 p->next = *head;
3420 *head = p;
3421 p->sec = sec;
3422 p->count = 0;
3423 p->pc_count = 0;
3424 }
3425
3426 p->count += 1;
3427 if (!MUST_BE_DYN_RELOC (r_type))
3428 p->pc_count += 1;
3429 }
3430
3431 break;
3432 }
3433 }
3434
3435 return TRUE;
3436 }
3437 \f
3438 /* Merge backend specific data from an object file to the output
3439 object file when linking. */
3440
3441 static bfd_boolean
3442 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3443 {
3444 flagword old_flags;
3445 flagword new_flags;
3446 bfd_boolean error;
3447
3448 if (!is_ppc_elf_target (ibfd->xvec)
3449 || !is_ppc_elf_target (obfd->xvec))
3450 return TRUE;
3451
3452 /* Check if we have the same endianess. */
3453 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3454 return FALSE;
3455
3456 new_flags = elf_elfheader (ibfd)->e_flags;
3457 old_flags = elf_elfheader (obfd)->e_flags;
3458 if (!elf_flags_init (obfd))
3459 {
3460 /* First call, no flags set. */
3461 elf_flags_init (obfd) = TRUE;
3462 elf_elfheader (obfd)->e_flags = new_flags;
3463 }
3464
3465 /* Compatible flags are ok. */
3466 else if (new_flags == old_flags)
3467 ;
3468
3469 /* Incompatible flags. */
3470 else
3471 {
3472 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3473 to be linked with either. */
3474 error = FALSE;
3475 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3476 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3477 {
3478 error = TRUE;
3479 (*_bfd_error_handler)
3480 (_("%B: compiled with -mrelocatable and linked with "
3481 "modules compiled normally"), ibfd);
3482 }
3483 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3484 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3485 {
3486 error = TRUE;
3487 (*_bfd_error_handler)
3488 (_("%B: compiled normally and linked with "
3489 "modules compiled with -mrelocatable"), ibfd);
3490 }
3491
3492 /* The output is -mrelocatable-lib iff both the input files are. */
3493 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3494 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3495
3496 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3497 but each input file is either -mrelocatable or -mrelocatable-lib. */
3498 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3499 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3500 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3501 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3502
3503 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3504 any module uses it. */
3505 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3506
3507 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3508 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3509
3510 /* Warn about any other mismatches. */
3511 if (new_flags != old_flags)
3512 {
3513 error = TRUE;
3514 (*_bfd_error_handler)
3515 (_("%B: uses different e_flags (0x%lx) fields "
3516 "than previous modules (0x%lx)"),
3517 ibfd, (long) new_flags, (long) old_flags);
3518 }
3519
3520 if (error)
3521 {
3522 bfd_set_error (bfd_error_bad_value);
3523 return FALSE;
3524 }
3525 }
3526
3527 return TRUE;
3528 }
3529 \f
3530 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3531 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3532 int
3533 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3534 struct bfd_link_info *info,
3535 int force_old_plt)
3536 {
3537 struct ppc_elf_link_hash_table *htab;
3538 flagword flags;
3539
3540 htab = ppc_elf_hash_table (info);
3541 if (force_old_plt || !htab->new_plt)
3542 htab->old_plt = 1;
3543
3544 if (htab->is_vxworks)
3545 {
3546 /* The VxWorks PLT is a loaded section with contents. */
3547 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
3548 | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3549
3550 if (htab->plt != NULL
3551 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3552 return -1;
3553 }
3554 else if (!htab->old_plt)
3555 {
3556 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3557 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3558
3559 /* The new PLT is a loaded section. */
3560 if (htab->plt != NULL
3561 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3562 return -1;
3563
3564 /* The new GOT is not executable. */
3565 if (htab->got != NULL
3566 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3567 return -1;
3568 }
3569 else
3570 {
3571 /* Stop an unused .glink section from affecting .text alignment. */
3572 if (htab->glink != NULL
3573 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3574 return -1;
3575 }
3576 return !htab->old_plt;
3577 }
3578 \f
3579 /* Return the section that should be marked against GC for a given
3580 relocation. */
3581
3582 static asection *
3583 ppc_elf_gc_mark_hook (asection *sec,
3584 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3585 Elf_Internal_Rela *rel,
3586 struct elf_link_hash_entry *h,
3587 Elf_Internal_Sym *sym)
3588 {
3589 if (h != NULL)
3590 {
3591 switch (ELF32_R_TYPE (rel->r_info))
3592 {
3593 case R_PPC_GNU_VTINHERIT:
3594 case R_PPC_GNU_VTENTRY:
3595 break;
3596
3597 default:
3598 switch (h->root.type)
3599 {
3600 case bfd_link_hash_defined:
3601 case bfd_link_hash_defweak:
3602 return h->root.u.def.section;
3603
3604 case bfd_link_hash_common:
3605 return h->root.u.c.p->section;
3606
3607 default:
3608 break;
3609 }
3610 }
3611 }
3612 else
3613 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3614
3615 return NULL;
3616 }
3617
3618 /* Update the got, plt and dynamic reloc reference counts for the
3619 section being removed. */
3620
3621 static bfd_boolean
3622 ppc_elf_gc_sweep_hook (bfd *abfd,
3623 struct bfd_link_info *info,
3624 asection *sec,
3625 const Elf_Internal_Rela *relocs)
3626 {
3627 struct ppc_elf_link_hash_table *htab;
3628 Elf_Internal_Shdr *symtab_hdr;
3629 struct elf_link_hash_entry **sym_hashes;
3630 bfd_signed_vma *local_got_refcounts;
3631 const Elf_Internal_Rela *rel, *relend;
3632 asection *got2;
3633
3634 if ((sec->flags & SEC_ALLOC) == 0)
3635 return TRUE;
3636
3637 elf_section_data (sec)->local_dynrel = NULL;
3638
3639 htab = ppc_elf_hash_table (info);
3640 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3641 sym_hashes = elf_sym_hashes (abfd);
3642 local_got_refcounts = elf_local_got_refcounts (abfd);
3643 got2 = bfd_get_section_by_name (abfd, ".got2");
3644
3645 relend = relocs + sec->reloc_count;
3646 for (rel = relocs; rel < relend; rel++)
3647 {
3648 unsigned long r_symndx;
3649 enum elf_ppc_reloc_type r_type;
3650 struct elf_link_hash_entry *h = NULL;
3651
3652 r_symndx = ELF32_R_SYM (rel->r_info);
3653 if (r_symndx >= symtab_hdr->sh_info)
3654 {
3655 struct ppc_elf_dyn_relocs **pp, *p;
3656 struct ppc_elf_link_hash_entry *eh;
3657
3658 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3659 while (h->root.type == bfd_link_hash_indirect
3660 || h->root.type == bfd_link_hash_warning)
3661 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3662 eh = (struct ppc_elf_link_hash_entry *) h;
3663
3664 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3665 if (p->sec == sec)
3666 {
3667 /* Everything must go for SEC. */
3668 *pp = p->next;
3669 break;
3670 }
3671 }
3672
3673 r_type = ELF32_R_TYPE (rel->r_info);
3674 switch (r_type)
3675 {
3676 case R_PPC_GOT_TLSLD16:
3677 case R_PPC_GOT_TLSLD16_LO:
3678 case R_PPC_GOT_TLSLD16_HI:
3679 case R_PPC_GOT_TLSLD16_HA:
3680 htab->tlsld_got.refcount -= 1;
3681 /* Fall thru */
3682
3683 case R_PPC_GOT_TLSGD16:
3684 case R_PPC_GOT_TLSGD16_LO:
3685 case R_PPC_GOT_TLSGD16_HI:
3686 case R_PPC_GOT_TLSGD16_HA:
3687 case R_PPC_GOT_TPREL16:
3688 case R_PPC_GOT_TPREL16_LO:
3689 case R_PPC_GOT_TPREL16_HI:
3690 case R_PPC_GOT_TPREL16_HA:
3691 case R_PPC_GOT_DTPREL16:
3692 case R_PPC_GOT_DTPREL16_LO:
3693 case R_PPC_GOT_DTPREL16_HI:
3694 case R_PPC_GOT_DTPREL16_HA:
3695 case R_PPC_GOT16:
3696 case R_PPC_GOT16_LO:
3697 case R_PPC_GOT16_HI:
3698 case R_PPC_GOT16_HA:
3699 if (h != NULL)
3700 {
3701 if (h->got.refcount > 0)
3702 h->got.refcount--;
3703 }
3704 else if (local_got_refcounts != NULL)
3705 {
3706 if (local_got_refcounts[r_symndx] > 0)
3707 local_got_refcounts[r_symndx]--;
3708 }
3709 break;
3710
3711 case R_PPC_REL24:
3712 case R_PPC_REL14:
3713 case R_PPC_REL14_BRTAKEN:
3714 case R_PPC_REL14_BRNTAKEN:
3715 case R_PPC_REL32:
3716 if (h == NULL || h == htab->elf.hgot)
3717 break;
3718 /* Fall thru */
3719
3720 case R_PPC_ADDR32:
3721 case R_PPC_ADDR24:
3722 case R_PPC_ADDR16:
3723 case R_PPC_ADDR16_LO:
3724 case R_PPC_ADDR16_HI:
3725 case R_PPC_ADDR16_HA:
3726 case R_PPC_ADDR14:
3727 case R_PPC_ADDR14_BRTAKEN:
3728 case R_PPC_ADDR14_BRNTAKEN:
3729 case R_PPC_UADDR32:
3730 case R_PPC_UADDR16:
3731 if (info->shared)
3732 break;
3733
3734 case R_PPC_PLT32:
3735 case R_PPC_PLTREL24:
3736 case R_PPC_PLTREL32:
3737 case R_PPC_PLT16_LO:
3738 case R_PPC_PLT16_HI:
3739 case R_PPC_PLT16_HA:
3740 if (h != NULL)
3741 {
3742 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3743 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3744 if (ent->plt.refcount > 0)
3745 ent->plt.refcount -= 1;
3746 }
3747 break;
3748
3749 default:
3750 break;
3751 }
3752 }
3753 return TRUE;
3754 }
3755 \f
3756 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3757
3758 asection *
3759 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3760 {
3761 struct ppc_elf_link_hash_table *htab;
3762
3763 htab = ppc_elf_hash_table (info);
3764 if (!htab->old_plt
3765 && htab->plt != NULL
3766 && htab->plt->output_section != NULL)
3767 {
3768 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3769 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3770 }
3771
3772 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3773 FALSE, FALSE, TRUE);
3774 return _bfd_elf_tls_setup (obfd, info);
3775 }
3776
3777 /* Run through all the TLS relocs looking for optimization
3778 opportunities. */
3779
3780 bfd_boolean
3781 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3782 struct bfd_link_info *info)
3783 {
3784 bfd *ibfd;
3785 asection *sec;
3786 struct ppc_elf_link_hash_table *htab;
3787
3788 if (info->relocatable || info->shared)
3789 return TRUE;
3790
3791 htab = ppc_elf_hash_table (info);
3792 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3793 {
3794 Elf_Internal_Sym *locsyms = NULL;
3795 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3796
3797 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3798 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3799 {
3800 Elf_Internal_Rela *relstart, *rel, *relend;
3801 int expecting_tls_get_addr;
3802
3803 /* Read the relocations. */
3804 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3805 info->keep_memory);
3806 if (relstart == NULL)
3807 return FALSE;
3808
3809 expecting_tls_get_addr = 0;
3810 relend = relstart + sec->reloc_count;
3811 for (rel = relstart; rel < relend; rel++)
3812 {
3813 enum elf_ppc_reloc_type r_type;
3814 unsigned long r_symndx;
3815 struct elf_link_hash_entry *h = NULL;
3816 char *tls_mask;
3817 char tls_set, tls_clear;
3818 bfd_boolean is_local;
3819
3820 r_symndx = ELF32_R_SYM (rel->r_info);
3821 if (r_symndx >= symtab_hdr->sh_info)
3822 {
3823 struct elf_link_hash_entry **sym_hashes;
3824
3825 sym_hashes = elf_sym_hashes (ibfd);
3826 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3827 while (h->root.type == bfd_link_hash_indirect
3828 || h->root.type == bfd_link_hash_warning)
3829 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3830 }
3831
3832 is_local = FALSE;
3833 if (h == NULL
3834 || !h->def_dynamic)
3835 is_local = TRUE;
3836
3837 r_type = ELF32_R_TYPE (rel->r_info);
3838 switch (r_type)
3839 {
3840 case R_PPC_GOT_TLSLD16:
3841 case R_PPC_GOT_TLSLD16_LO:
3842 case R_PPC_GOT_TLSLD16_HI:
3843 case R_PPC_GOT_TLSLD16_HA:
3844 /* These relocs should never be against a symbol
3845 defined in a shared lib. Leave them alone if
3846 that turns out to be the case. */
3847 expecting_tls_get_addr = 0;
3848 htab->tlsld_got.refcount -= 1;
3849 if (!is_local)
3850 continue;
3851
3852 /* LD -> LE */
3853 tls_set = 0;
3854 tls_clear = TLS_LD;
3855 expecting_tls_get_addr = 1;
3856 break;
3857
3858 case R_PPC_GOT_TLSGD16:
3859 case R_PPC_GOT_TLSGD16_LO:
3860 case R_PPC_GOT_TLSGD16_HI:
3861 case R_PPC_GOT_TLSGD16_HA:
3862 if (is_local)
3863 /* GD -> LE */
3864 tls_set = 0;
3865 else
3866 /* GD -> IE */
3867 tls_set = TLS_TLS | TLS_TPRELGD;
3868 tls_clear = TLS_GD;
3869 expecting_tls_get_addr = 1;
3870 break;
3871
3872 case R_PPC_GOT_TPREL16:
3873 case R_PPC_GOT_TPREL16_LO:
3874 case R_PPC_GOT_TPREL16_HI:
3875 case R_PPC_GOT_TPREL16_HA:
3876 expecting_tls_get_addr = 0;
3877 if (is_local)
3878 {
3879 /* IE -> LE */
3880 tls_set = 0;
3881 tls_clear = TLS_TPREL;
3882 break;
3883 }
3884 else
3885 continue;
3886
3887 case R_PPC_REL14:
3888 case R_PPC_REL14_BRTAKEN:
3889 case R_PPC_REL14_BRNTAKEN:
3890 case R_PPC_REL24:
3891 if (expecting_tls_get_addr
3892 && h != NULL
3893 && h == htab->tls_get_addr)
3894 {
3895 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3896 if (ent != NULL && ent->plt.refcount > 0)
3897 ent->plt.refcount -= 1;
3898 }
3899 expecting_tls_get_addr = 0;
3900 continue;
3901
3902 default:
3903 expecting_tls_get_addr = 0;
3904 continue;
3905 }
3906
3907 if (h != NULL)
3908 {
3909 if (tls_set == 0)
3910 {
3911 /* We managed to get rid of a got entry. */
3912 if (h->got.refcount > 0)
3913 h->got.refcount -= 1;
3914 }
3915 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3916 }
3917 else
3918 {
3919 Elf_Internal_Sym *sym;
3920 bfd_signed_vma *lgot_refs;
3921 char *lgot_masks;
3922
3923 if (locsyms == NULL)
3924 {
3925 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3926 if (locsyms == NULL)
3927 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3928 symtab_hdr->sh_info,
3929 0, NULL, NULL, NULL);
3930 if (locsyms == NULL)
3931 {
3932 if (elf_section_data (sec)->relocs != relstart)
3933 free (relstart);
3934 return FALSE;
3935 }
3936 }
3937 sym = locsyms + r_symndx;
3938 lgot_refs = elf_local_got_refcounts (ibfd);
3939 if (lgot_refs == NULL)
3940 abort ();
3941 if (tls_set == 0)
3942 {
3943 /* We managed to get rid of a got entry. */
3944 if (lgot_refs[r_symndx] > 0)
3945 lgot_refs[r_symndx] -= 1;
3946 }
3947 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3948 tls_mask = &lgot_masks[r_symndx];
3949 }
3950
3951 *tls_mask |= tls_set;
3952 *tls_mask &= ~tls_clear;
3953 }
3954
3955 if (elf_section_data (sec)->relocs != relstart)
3956 free (relstart);
3957 }
3958
3959 if (locsyms != NULL
3960 && (symtab_hdr->contents != (unsigned char *) locsyms))
3961 {
3962 if (!info->keep_memory)
3963 free (locsyms);
3964 else
3965 symtab_hdr->contents = (unsigned char *) locsyms;
3966 }
3967 }
3968 return TRUE;
3969 }
3970 \f
3971 /* Adjust a symbol defined by a dynamic object and referenced by a
3972 regular object. The current definition is in some section of the
3973 dynamic object, but we're not including those sections. We have to
3974 change the definition to something the rest of the link can
3975 understand. */
3976
3977 static bfd_boolean
3978 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3979 struct elf_link_hash_entry *h)
3980 {
3981 struct ppc_elf_link_hash_table *htab;
3982 asection *s;
3983 unsigned int power_of_two;
3984
3985 #ifdef DEBUG
3986 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3987 h->root.root.string);
3988 #endif
3989
3990 /* Make sure we know what is going on here. */
3991 htab = ppc_elf_hash_table (info);
3992 BFD_ASSERT (htab->elf.dynobj != NULL
3993 && (h->needs_plt
3994 || h->u.weakdef != NULL
3995 || (h->def_dynamic
3996 && h->ref_regular
3997 && !h->def_regular)));
3998
3999 /* Deal with function syms. */
4000 if (h->type == STT_FUNC
4001 || h->needs_plt)
4002 {
4003 /* Clear procedure linkage table information for any symbol that
4004 won't need a .plt entry. */
4005 struct plt_entry *ent;
4006 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4007 if (ent->plt.refcount > 0)
4008 break;
4009 if (ent == NULL
4010 || SYMBOL_CALLS_LOCAL (info, h)
4011 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4012 && h->root.type == bfd_link_hash_undefweak))
4013 {
4014 /* A PLT entry is not required/allowed when:
4015
4016 1. We are not using ld.so; because then the PLT entry
4017 can't be set up, so we can't use one. In this case,
4018 ppc_elf_adjust_dynamic_symbol won't even be called.
4019
4020 2. GC has rendered the entry unused.
4021
4022 3. We know for certain that a call to this symbol
4023 will go to this object, or will remain undefined. */
4024 h->plt.plist = NULL;
4025 h->needs_plt = 0;
4026 }
4027 return TRUE;
4028 }
4029 else
4030 h->plt.plist = NULL;
4031
4032 /* If this is a weak symbol, and there is a real definition, the
4033 processor independent code will have arranged for us to see the
4034 real definition first, and we can just use the same value. */
4035 if (h->u.weakdef != NULL)
4036 {
4037 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4038 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4039 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4040 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4041 if (ELIMINATE_COPY_RELOCS)
4042 h->non_got_ref = h->u.weakdef->non_got_ref;
4043 return TRUE;
4044 }
4045
4046 /* This is a reference to a symbol defined by a dynamic object which
4047 is not a function. */
4048
4049 /* First, a fudge for old shared libs that export some symbols they
4050 should not. */
4051 if (!h->def_regular
4052 && (strcmp (h->root.root.string, "_SDA_BASE_") == 0
4053 || strcmp (h->root.root.string, "_SDA2_BASE_") == 0))
4054 {
4055 /* These symbols will be defined later, as if they were defined in
4056 a linker script. We don't want to use a definition in a shared
4057 object. */
4058 const struct elf_backend_data *bed;
4059
4060 bed = get_elf_backend_data (htab->elf.dynobj);
4061 (*bed->elf_backend_hide_symbol) (info, h, TRUE);
4062 h->root.type = bfd_link_hash_undefined;
4063 h->root.u.undef.abfd = htab->elf.dynobj;
4064 return TRUE;
4065 }
4066
4067 /* If we are creating a shared library, we must presume that the
4068 only references to the symbol are via the global offset table.
4069 For such cases we need not do anything here; the relocations will
4070 be handled correctly by relocate_section. */
4071 if (info->shared)
4072 return TRUE;
4073
4074 /* If there are no references to this symbol that do not use the
4075 GOT, we don't need to generate a copy reloc. */
4076 if (!h->non_got_ref)
4077 return TRUE;
4078
4079 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4080 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4081 do this if there are any small data relocations. */
4082 if (ELIMINATE_COPY_RELOCS
4083 && !ppc_elf_hash_entry (h)->has_sda_refs)
4084 {
4085 struct ppc_elf_dyn_relocs *p;
4086 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4087 {
4088 s = p->sec->output_section;
4089 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4090 break;
4091 }
4092
4093 if (p == NULL)
4094 {
4095 h->non_got_ref = 0;
4096 return TRUE;
4097 }
4098 }
4099
4100 /* We must allocate the symbol in our .dynbss section, which will
4101 become part of the .bss section of the executable. There will be
4102 an entry for this symbol in the .dynsym section. The dynamic
4103 object will contain position independent code, so all references
4104 from the dynamic object to this symbol will go through the global
4105 offset table. The dynamic linker will use the .dynsym entry to
4106 determine the address it must put in the global offset table, so
4107 both the dynamic object and the regular object will refer to the
4108 same memory location for the variable.
4109
4110 Of course, if the symbol is referenced using SDAREL relocs, we
4111 must instead allocate it in .sbss. */
4112
4113 if (ppc_elf_hash_entry (h)->has_sda_refs)
4114 s = htab->dynsbss;
4115 else
4116 s = htab->dynbss;
4117 BFD_ASSERT (s != NULL);
4118
4119 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4120 copy the initial value out of the dynamic object and into the
4121 runtime process image. We need to remember the offset into the
4122 .rela.bss section we are going to use. */
4123 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4124 {
4125 asection *srel;
4126
4127 if (ppc_elf_hash_entry (h)->has_sda_refs)
4128 srel = htab->relsbss;
4129 else
4130 srel = htab->relbss;
4131 BFD_ASSERT (srel != NULL);
4132 srel->size += sizeof (Elf32_External_Rela);
4133 h->needs_copy = 1;
4134 }
4135
4136 /* We need to figure out the alignment required for this symbol. I
4137 have no idea how ELF linkers handle this. */
4138 power_of_two = bfd_log2 (h->size);
4139 if (power_of_two > 4)
4140 power_of_two = 4;
4141
4142 /* Apply the required alignment. */
4143 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4144 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4145 {
4146 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4147 return FALSE;
4148 }
4149
4150 /* Define the symbol as being at this point in the section. */
4151 h->root.u.def.section = s;
4152 h->root.u.def.value = s->size;
4153
4154 /* Increment the section size to make room for the symbol. */
4155 s->size += h->size;
4156
4157 return TRUE;
4158 }
4159 \f
4160 /* Allocate NEED contiguous space in .got, and return the offset.
4161 Handles allocation of the got header when crossing 32k. */
4162
4163 static bfd_vma
4164 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4165 {
4166 bfd_vma where;
4167 unsigned int max_before_header = 32768;
4168
4169 if (htab->old_plt)
4170 max_before_header = 32764;
4171
4172 if (htab->is_vxworks)
4173 {
4174 where = htab->got->size;
4175 htab->got->size += need;
4176 }
4177 else if (need <= htab->got_gap)
4178 {
4179 where = max_before_header - htab->got_gap;
4180 htab->got_gap -= need;
4181 }
4182 else
4183 {
4184 if (htab->got->size + need > max_before_header
4185 && htab->got->size <= max_before_header)
4186 {
4187 htab->got_gap = max_before_header - htab->got->size;
4188 htab->got->size = max_before_header + htab->got_header_size;
4189 }
4190 where = htab->got->size;
4191 htab->got->size += need;
4192 }
4193 return where;
4194 }
4195
4196 /* Allocate space in associated reloc sections for dynamic relocs. */
4197
4198 static bfd_boolean
4199 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4200 {
4201 struct bfd_link_info *info = inf;
4202 struct ppc_elf_link_hash_entry *eh;
4203 struct ppc_elf_link_hash_table *htab;
4204 struct ppc_elf_dyn_relocs *p;
4205
4206 if (h->root.type == bfd_link_hash_indirect)
4207 return TRUE;
4208
4209 if (h->root.type == bfd_link_hash_warning)
4210 /* When warning symbols are created, they **replace** the "real"
4211 entry in the hash table, thus we never get to see the real
4212 symbol in a hash traversal. So look at it now. */
4213 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4214
4215 htab = ppc_elf_hash_table (info);
4216 if (htab->elf.dynamic_sections_created)
4217 {
4218 struct plt_entry *ent;
4219 bfd_boolean doneone = FALSE;
4220 bfd_vma plt_offset = 0, glink_offset = 0;
4221
4222 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4223 if (ent->plt.refcount > 0)
4224 {
4225 /* Make sure this symbol is output as a dynamic symbol. */
4226 if (h->dynindx == -1
4227 && !h->forced_local)
4228 {
4229 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4230 return FALSE;
4231 }
4232
4233 if (info->shared
4234 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4235 {
4236 asection *s = htab->plt;
4237
4238 if (!(htab->old_plt || htab->is_vxworks))
4239 {
4240 if (!doneone)
4241 {
4242 plt_offset = s->size;
4243 s->size += 4;
4244 }
4245 ent->plt.offset = plt_offset;
4246
4247 s = htab->glink;
4248 if (!doneone || info->shared || info->pie)
4249 {
4250 glink_offset = s->size;
4251 s->size += GLINK_ENTRY_SIZE;
4252 }
4253 if (!doneone
4254 && !info->shared
4255 && !h->def_regular)
4256 {
4257 h->root.u.def.section = s;
4258 h->root.u.def.value = glink_offset;
4259 }
4260 ent->glink_offset = glink_offset;
4261 }
4262 else
4263 {
4264 if (!doneone)
4265 {
4266 /* If this is the first .plt entry, make room
4267 for the special first entry. */
4268 if (s->size == 0)
4269 s->size += htab->plt_initial_entry_size;
4270
4271 /* The PowerPC PLT is actually composed of two
4272 parts, the first part is 2 words (for a load
4273 and a jump), and then there is a remaining
4274 word available at the end. */
4275 plt_offset = (htab->plt_initial_entry_size
4276 + (htab->plt_slot_size
4277 * ((s->size
4278 - htab->plt_initial_entry_size)
4279 / htab->plt_entry_size)));
4280
4281 /* If this symbol is not defined in a regular
4282 file, and we are not generating a shared
4283 library, then set the symbol to this location
4284 in the .plt. This is required to make
4285 function pointers compare as equal between
4286 the normal executable and the shared library. */
4287 if (! info->shared
4288 && !h->def_regular)
4289 {
4290 h->root.u.def.section = s;
4291 h->root.u.def.value = plt_offset;
4292 }
4293
4294 /* Make room for this entry. */
4295 s->size += htab->plt_entry_size;
4296 /* After the 8192nd entry, room for two entries
4297 is allocated. */
4298 if (!htab->is_vxworks
4299 && (s->size - htab->plt_initial_entry_size)
4300 / htab->plt_entry_size
4301 > PLT_NUM_SINGLE_ENTRIES)
4302 s->size += htab->plt_entry_size;
4303 }
4304 ent->plt.offset = plt_offset;
4305 }
4306
4307 /* We also need to make an entry in the .rela.plt section. */
4308 if (!doneone)
4309 {
4310 htab->relplt->size += sizeof (Elf32_External_Rela);
4311
4312 if (htab->is_vxworks)
4313 {
4314 /* Allocate space for the unloaded relocations. */
4315 if (!info->shared)
4316 {
4317 if (ent->plt.offset
4318 == (bfd_vma) htab->plt_initial_entry_size)
4319 {
4320 htab->srelplt2->size
4321 += sizeof (Elf32_External_Rela)
4322 * VXWORKS_PLTRESOLVE_RELOCS;
4323 }
4324
4325 htab->srelplt2->size
4326 += sizeof (Elf32_External_Rela)
4327 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4328 }
4329
4330 /* Every PLT entry has an associated GOT entry in
4331 .got.plt. */
4332 htab->sgotplt->size += 4;
4333 }
4334 doneone = TRUE;
4335 }
4336 }
4337 else
4338 ent->plt.offset = (bfd_vma) -1;
4339
4340 if (!doneone)
4341 {
4342 h->plt.plist = NULL;
4343 h->needs_plt = 0;
4344 }
4345 }
4346 }
4347 else
4348 {
4349 h->plt.plist = NULL;
4350 h->needs_plt = 0;
4351 }
4352
4353 eh = (struct ppc_elf_link_hash_entry *) h;
4354 if (eh->elf.got.refcount > 0)
4355 {
4356 /* Make sure this symbol is output as a dynamic symbol. */
4357 if (eh->elf.dynindx == -1
4358 && !eh->elf.forced_local)
4359 {
4360 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4361 return FALSE;
4362 }
4363
4364 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4365 && !eh->elf.def_dynamic)
4366 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4367 eh->elf.got.offset = (bfd_vma) -1;
4368 else
4369 {
4370 bfd_boolean dyn;
4371 unsigned int need = 0;
4372 if ((eh->tls_mask & TLS_TLS) != 0)
4373 {
4374 if ((eh->tls_mask & TLS_LD) != 0)
4375 need += 8;
4376 if ((eh->tls_mask & TLS_GD) != 0)
4377 need += 8;
4378 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4379 need += 4;
4380 if ((eh->tls_mask & TLS_DTPREL) != 0)
4381 need += 4;
4382 }
4383 else
4384 need += 4;
4385 eh->elf.got.offset = allocate_got (htab, need);
4386 dyn = htab->elf.dynamic_sections_created;
4387 if ((info->shared
4388 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4389 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4390 || eh->elf.root.type != bfd_link_hash_undefweak))
4391 {
4392 /* All the entries we allocated need relocs.
4393 Except LD only needs one. */
4394 if ((eh->tls_mask & TLS_LD) != 0)
4395 need -= 4;
4396 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4397 }
4398 }
4399 }
4400 else
4401 eh->elf.got.offset = (bfd_vma) -1;
4402
4403 if (eh->dyn_relocs == NULL)
4404 return TRUE;
4405
4406 /* In the shared -Bsymbolic case, discard space allocated for
4407 dynamic pc-relative relocs against symbols which turn out to be
4408 defined in regular objects. For the normal shared case, discard
4409 space for relocs that have become local due to symbol visibility
4410 changes. */
4411
4412 if (info->shared)
4413 {
4414 /* Relocs that use pc_count are those that appear on a call insn,
4415 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4416 generated via assembly. We want calls to protected symbols to
4417 resolve directly to the function rather than going via the plt.
4418 If people want function pointer comparisons to work as expected
4419 then they should avoid writing weird assembly. */
4420 if (SYMBOL_CALLS_LOCAL (info, h))
4421 {
4422 struct ppc_elf_dyn_relocs **pp;
4423
4424 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4425 {
4426 p->count -= p->pc_count;
4427 p->pc_count = 0;
4428 if (p->count == 0)
4429 *pp = p->next;
4430 else
4431 pp = &p->next;
4432 }
4433 }
4434
4435 /* Also discard relocs on undefined weak syms with non-default
4436 visibility. */
4437 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4438 && h->root.type == bfd_link_hash_undefweak)
4439 eh->dyn_relocs = NULL;
4440
4441 /* Make sure undefined weak symbols are output as a dynamic symbol
4442 in PIEs. */
4443 if (info->pie
4444 && eh->dyn_relocs != NULL
4445 && h->dynindx == -1
4446 && h->root.type == bfd_link_hash_undefweak
4447 && !h->forced_local)
4448 {
4449 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4450 return FALSE;
4451 }
4452 }
4453 else if (ELIMINATE_COPY_RELOCS)
4454 {
4455 /* For the non-shared case, discard space for relocs against
4456 symbols which turn out to need copy relocs or are not
4457 dynamic. */
4458
4459 if (!h->non_got_ref
4460 && h->def_dynamic
4461 && !h->def_regular)
4462 {
4463 /* Make sure this symbol is output as a dynamic symbol.
4464 Undefined weak syms won't yet be marked as dynamic. */
4465 if (h->dynindx == -1
4466 && !h->forced_local)
4467 {
4468 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4469 return FALSE;
4470 }
4471
4472 /* If that succeeded, we know we'll be keeping all the
4473 relocs. */
4474 if (h->dynindx != -1)
4475 goto keep;
4476 }
4477
4478 eh->dyn_relocs = NULL;
4479
4480 keep: ;
4481 }
4482
4483 /* Finally, allocate space. */
4484 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4485 {
4486 asection *sreloc = elf_section_data (p->sec)->sreloc;
4487 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4488 }
4489
4490 return TRUE;
4491 }
4492
4493 /* Find any dynamic relocs that apply to read-only sections. */
4494
4495 static bfd_boolean
4496 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4497 {
4498 struct ppc_elf_dyn_relocs *p;
4499
4500 if (h->root.type == bfd_link_hash_indirect)
4501 return TRUE;
4502
4503 if (h->root.type == bfd_link_hash_warning)
4504 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4505
4506 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4507 {
4508 asection *s = p->sec->output_section;
4509
4510 if (s != NULL
4511 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4512 == (SEC_READONLY | SEC_ALLOC)))
4513 {
4514 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4515
4516 /* Not an error, just cut short the traversal. */
4517 return FALSE;
4518 }
4519 }
4520 return TRUE;
4521 }
4522
4523 /* Set the sizes of the dynamic sections. */
4524
4525 static bfd_boolean
4526 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4527 struct bfd_link_info *info)
4528 {
4529 struct ppc_elf_link_hash_table *htab;
4530 asection *s;
4531 bfd_boolean relocs;
4532 bfd *ibfd;
4533
4534 #ifdef DEBUG
4535 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4536 #endif
4537
4538 htab = ppc_elf_hash_table (info);
4539 BFD_ASSERT (htab->elf.dynobj != NULL);
4540
4541 if (elf_hash_table (info)->dynamic_sections_created)
4542 {
4543 /* Set the contents of the .interp section to the interpreter. */
4544 if (info->executable)
4545 {
4546 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4547 BFD_ASSERT (s != NULL);
4548 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4549 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4550 }
4551 }
4552
4553 if (htab->old_plt)
4554 htab->got_header_size = 16;
4555 else
4556 htab->got_header_size = 12;
4557
4558 /* Set up .got offsets for local syms, and space for local dynamic
4559 relocs. */
4560 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4561 {
4562 bfd_signed_vma *local_got;
4563 bfd_signed_vma *end_local_got;
4564 char *lgot_masks;
4565 bfd_size_type locsymcount;
4566 Elf_Internal_Shdr *symtab_hdr;
4567
4568 if (!is_ppc_elf_target (ibfd->xvec))
4569 continue;
4570
4571 for (s = ibfd->sections; s != NULL; s = s->next)
4572 {
4573 struct ppc_elf_dyn_relocs *p;
4574
4575 for (p = ((struct ppc_elf_dyn_relocs *)
4576 elf_section_data (s)->local_dynrel);
4577 p != NULL;
4578 p = p->next)
4579 {
4580 if (!bfd_is_abs_section (p->sec)
4581 && bfd_is_abs_section (p->sec->output_section))
4582 {
4583 /* Input section has been discarded, either because
4584 it is a copy of a linkonce section or due to
4585 linker script /DISCARD/, so we'll be discarding
4586 the relocs too. */
4587 }
4588 else if (p->count != 0)
4589 {
4590 elf_section_data (p->sec)->sreloc->size
4591 += p->count * sizeof (Elf32_External_Rela);
4592 if ((p->sec->output_section->flags
4593 & (SEC_READONLY | SEC_ALLOC))
4594 == (SEC_READONLY | SEC_ALLOC))
4595 info->flags |= DF_TEXTREL;
4596 }
4597 }
4598 }
4599
4600 local_got = elf_local_got_refcounts (ibfd);
4601 if (!local_got)
4602 continue;
4603
4604 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4605 locsymcount = symtab_hdr->sh_info;
4606 end_local_got = local_got + locsymcount;
4607 lgot_masks = (char *) end_local_got;
4608 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4609 if (*local_got > 0)
4610 {
4611 if (*lgot_masks == (TLS_TLS | TLS_LD))
4612 {
4613 /* If just an LD reloc, we'll just use
4614 htab->tlsld_got.offset. */
4615 htab->tlsld_got.refcount += 1;
4616 *local_got = (bfd_vma) -1;
4617 }
4618 else
4619 {
4620 unsigned int need = 0;
4621 if ((*lgot_masks & TLS_TLS) != 0)
4622 {
4623 if ((*lgot_masks & TLS_GD) != 0)
4624 need += 8;
4625 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4626 need += 4;
4627 if ((*lgot_masks & TLS_DTPREL) != 0)
4628 need += 4;
4629 }
4630 else
4631 need += 4;
4632 *local_got = allocate_got (htab, need);
4633 if (info->shared)
4634 htab->relgot->size += (need
4635 * (sizeof (Elf32_External_Rela) / 4));
4636 }
4637 }
4638 else
4639 *local_got = (bfd_vma) -1;
4640 }
4641
4642 if (htab->tlsld_got.refcount > 0)
4643 {
4644 htab->tlsld_got.offset = allocate_got (htab, 8);
4645 if (info->shared)
4646 htab->relgot->size += sizeof (Elf32_External_Rela);
4647 }
4648 else
4649 htab->tlsld_got.offset = (bfd_vma) -1;
4650
4651 if (htab->is_vxworks)
4652 {
4653 /* Save the GOT and PLT symbols in the hash table for easy access.
4654 Mark them as having relocations; they might not, but we won't
4655 know for sure until we build the GOT in finish_dynamic_symbol. */
4656
4657 htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
4658 "_GLOBAL_OFFSET_TABLE_",
4659 FALSE, FALSE, FALSE);
4660 if (htab->hgot)
4661 htab->hgot->indx = -2;
4662 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
4663 "_PROCEDURE_LINKAGE_TABLE_",
4664 FALSE, FALSE, FALSE);
4665 if (htab->hplt)
4666 htab->hplt->indx = -2;
4667 /* If the PLT is executable then give the symbol function type. */
4668 if (htab->hplt && htab->plt->flags & SEC_CODE)
4669 htab->hplt->type = STT_FUNC;
4670 }
4671
4672 /* Allocate space for global sym dynamic relocs. */
4673 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4674
4675 if (htab->got != NULL && !htab->is_vxworks)
4676 {
4677 unsigned int g_o_t = 32768;
4678
4679 /* If we haven't allocated the header, do so now. When we get here,
4680 for old plt/got the got size will be 0 to 32764 (not allocated),
4681 or 32780 to 65536 (header allocated). For new plt/got, the
4682 corresponding ranges are 0 to 32768 and 32780 to 65536. */
4683 if (htab->got->size <= 32768)
4684 {
4685 g_o_t = htab->got->size;
4686 if (htab->old_plt)
4687 g_o_t += 4;
4688 htab->got->size += htab->got_header_size;
4689 }
4690
4691 htab->elf.hgot->root.u.def.value = g_o_t;
4692 }
4693
4694 if (htab->glink != NULL && htab->glink->size != 0)
4695 {
4696 htab->glink_pltresolve = htab->glink->size;
4697 /* Space for the branch table. */
4698 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4699 /* Pad out to align the start of PLTresolve. */
4700 htab->glink->size += -htab->glink->size & 15;
4701 htab->glink->size += GLINK_PLTRESOLVE;
4702 }
4703
4704 /* We've now determined the sizes of the various dynamic sections.
4705 Allocate memory for them. */
4706 relocs = FALSE;
4707 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4708 {
4709 bfd_boolean strip_section = TRUE;
4710
4711 if ((s->flags & SEC_LINKER_CREATED) == 0)
4712 continue;
4713
4714 if (s == htab->plt
4715 || s == htab->glink
4716 || s == htab->got
4717 || s == htab->sgotplt
4718 || s == htab->sbss
4719 || s == htab->dynbss
4720 || s == htab->dynsbss)
4721 {
4722 /* We'd like to strip these sections if they aren't needed, but if
4723 we've exported dynamic symbols from them we must leave them.
4724 It's too late to tell BFD to get rid of the symbols. */
4725 if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
4726 strip_section = FALSE;
4727 /* Strip this section if we don't need it; see the
4728 comment below. */
4729 }
4730 else if (s == htab->sdata[0].section
4731 || s == htab->sdata[1].section)
4732 {
4733 /* Strip these too. */
4734 }
4735 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4736 {
4737 if (s->size != 0)
4738 {
4739 /* Remember whether there are any relocation sections. */
4740 relocs = TRUE;
4741
4742 /* We use the reloc_count field as a counter if we need
4743 to copy relocs into the output file. */
4744 s->reloc_count = 0;
4745 }
4746 }
4747 else
4748 {
4749 /* It's not one of our sections, so don't allocate space. */
4750 continue;
4751 }
4752
4753 if (s->size == 0 && strip_section)
4754 {
4755 /* If we don't need this section, strip it from the
4756 output file. This is mostly to handle .rela.bss and
4757 .rela.plt. We must create both sections in
4758 create_dynamic_sections, because they must be created
4759 before the linker maps input sections to output
4760 sections. The linker does that before
4761 adjust_dynamic_symbol is called, and it is that
4762 function which decides whether anything needs to go
4763 into these sections. */
4764 s->flags |= SEC_EXCLUDE;
4765 continue;
4766 }
4767
4768 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4769 continue;
4770
4771 /* Allocate memory for the section contents. */
4772 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4773 if (s->contents == NULL)
4774 return FALSE;
4775 }
4776
4777 if (htab->elf.dynamic_sections_created)
4778 {
4779 /* Add some entries to the .dynamic section. We fill in the
4780 values later, in ppc_elf_finish_dynamic_sections, but we
4781 must add the entries now so that we get the correct size for
4782 the .dynamic section. The DT_DEBUG entry is filled in by the
4783 dynamic linker and used by the debugger. */
4784 #define add_dynamic_entry(TAG, VAL) \
4785 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4786
4787 if (info->executable)
4788 {
4789 if (!add_dynamic_entry (DT_DEBUG, 0))
4790 return FALSE;
4791 }
4792
4793 if (htab->plt != NULL && htab->plt->size != 0)
4794 {
4795 if (!add_dynamic_entry (DT_PLTGOT, 0)
4796 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4797 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4798 || !add_dynamic_entry (DT_JMPREL, 0))
4799 return FALSE;
4800 }
4801
4802 if (htab->glink != NULL && htab->glink->size != 0)
4803 {
4804 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4805 return FALSE;
4806 }
4807
4808 if (relocs)
4809 {
4810 if (!add_dynamic_entry (DT_RELA, 0)
4811 || !add_dynamic_entry (DT_RELASZ, 0)
4812 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4813 return FALSE;
4814 }
4815
4816 /* If any dynamic relocs apply to a read-only section, then we
4817 need a DT_TEXTREL entry. */
4818 if ((info->flags & DF_TEXTREL) == 0)
4819 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4820 info);
4821
4822 if ((info->flags & DF_TEXTREL) != 0)
4823 {
4824 if (!add_dynamic_entry (DT_TEXTREL, 0))
4825 return FALSE;
4826 }
4827 }
4828 #undef add_dynamic_entry
4829
4830 return TRUE;
4831 }
4832 \f
4833 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4834
4835 static const int shared_stub_entry[] =
4836 {
4837 0x7c0802a6, /* mflr 0 */
4838 0x429f0005, /* bcl 20, 31, .Lxxx */
4839 0x7d6802a6, /* mflr 11 */
4840 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4841 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4842 0x7c0803a6, /* mtlr 0 */
4843 0x7d6903a6, /* mtctr 11 */
4844 0x4e800420, /* bctr */
4845 };
4846
4847 static const int stub_entry[] =
4848 {
4849 0x3d600000, /* lis 11,xxx@ha */
4850 0x396b0000, /* addi 11,11,xxx@l */
4851 0x7d6903a6, /* mtctr 11 */
4852 0x4e800420, /* bctr */
4853 };
4854
4855 static bfd_boolean
4856 ppc_elf_relax_section (bfd *abfd,
4857 asection *isec,
4858 struct bfd_link_info *link_info,
4859 bfd_boolean *again)
4860 {
4861 struct one_fixup
4862 {
4863 struct one_fixup *next;
4864 asection *tsec;
4865 bfd_vma toff;
4866 bfd_vma trampoff;
4867 };
4868
4869 Elf_Internal_Shdr *symtab_hdr;
4870 bfd_byte *contents = NULL;
4871 Elf_Internal_Sym *isymbuf = NULL;
4872 Elf_Internal_Rela *internal_relocs = NULL;
4873 Elf_Internal_Rela *irel, *irelend;
4874 struct one_fixup *fixups = NULL;
4875 bfd_boolean changed;
4876 struct ppc_elf_link_hash_table *htab;
4877 bfd_size_type trampoff;
4878 asection *got2;
4879
4880 *again = FALSE;
4881
4882 /* Nothing to do if there are no relocations, and no need to do
4883 anything with non-alloc sections. */
4884 if ((isec->flags & SEC_ALLOC) == 0
4885 || (isec->flags & SEC_RELOC) == 0
4886 || isec->reloc_count == 0)
4887 return TRUE;
4888
4889 trampoff = (isec->size + 3) & (bfd_vma) -4;
4890 /* Space for a branch around any trampolines. */
4891 trampoff += 4;
4892
4893 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4894
4895 /* Get a copy of the native relocations. */
4896 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4897 link_info->keep_memory);
4898 if (internal_relocs == NULL)
4899 goto error_return;
4900
4901 htab = ppc_elf_hash_table (link_info);
4902 got2 = bfd_get_section_by_name (abfd, ".got2");
4903
4904 irelend = internal_relocs + isec->reloc_count;
4905 for (irel = internal_relocs; irel < irelend; irel++)
4906 {
4907 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4908 bfd_vma symaddr, reladdr, toff, roff;
4909 asection *tsec;
4910 struct one_fixup *f;
4911 size_t insn_offset = 0;
4912 bfd_vma max_branch_offset, val;
4913 bfd_byte *hit_addr;
4914 unsigned long t0;
4915 unsigned char sym_type;
4916
4917 switch (r_type)
4918 {
4919 case R_PPC_REL24:
4920 case R_PPC_LOCAL24PC:
4921 case R_PPC_PLTREL24:
4922 max_branch_offset = 1 << 25;
4923 break;
4924
4925 case R_PPC_REL14:
4926 case R_PPC_REL14_BRTAKEN:
4927 case R_PPC_REL14_BRNTAKEN:
4928 max_branch_offset = 1 << 15;
4929 break;
4930
4931 default:
4932 continue;
4933 }
4934
4935 /* Get the value of the symbol referred to by the reloc. */
4936 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4937 {
4938 /* A local symbol. */
4939 Elf_Internal_Sym *isym;
4940
4941 /* Read this BFD's local symbols. */
4942 if (isymbuf == NULL)
4943 {
4944 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4945 if (isymbuf == NULL)
4946 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4947 symtab_hdr->sh_info, 0,
4948 NULL, NULL, NULL);
4949 if (isymbuf == 0)
4950 goto error_return;
4951 }
4952 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4953 if (isym->st_shndx == SHN_UNDEF)
4954 continue; /* We can't do anything with undefined symbols. */
4955 else if (isym->st_shndx == SHN_ABS)
4956 tsec = bfd_abs_section_ptr;
4957 else if (isym->st_shndx == SHN_COMMON)
4958 tsec = bfd_com_section_ptr;
4959 else
4960 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4961
4962 toff = isym->st_value;
4963 sym_type = ELF_ST_TYPE (isym->st_info);
4964 }
4965 else
4966 {
4967 /* Global symbol handling. */
4968 unsigned long indx;
4969 struct elf_link_hash_entry *h;
4970
4971 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4972 h = elf_sym_hashes (abfd)[indx];
4973
4974 while (h->root.type == bfd_link_hash_indirect
4975 || h->root.type == bfd_link_hash_warning)
4976 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4977
4978 tsec = NULL;
4979 toff = 0;
4980 if (r_type == R_PPC_PLTREL24
4981 && htab->plt != NULL)
4982 {
4983 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
4984
4985 if (ent != NULL)
4986 {
4987 if (!htab->old_plt)
4988 {
4989 tsec = htab->glink;
4990 toff = ent->glink_offset;
4991 }
4992 else
4993 {
4994 tsec = htab->plt;
4995 toff = ent->plt.offset;
4996 }
4997 }
4998 }
4999 if (tsec != NULL)
5000 ;
5001 else if (h->root.type == bfd_link_hash_defined
5002 || h->root.type == bfd_link_hash_defweak)
5003 {
5004 tsec = h->root.u.def.section;
5005 toff = h->root.u.def.value;
5006 }
5007 else
5008 continue;
5009
5010 sym_type = h->type;
5011 }
5012
5013 /* If the branch and target are in the same section, you have
5014 no hope of adding stubs. We'll error out later should the
5015 branch overflow. */
5016 if (tsec == isec)
5017 continue;
5018
5019 /* There probably isn't any reason to handle symbols in
5020 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5021 attribute for a code section, and we are only looking at
5022 branches. However, implement it correctly here as a
5023 reference for other target relax_section functions. */
5024 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5025 {
5026 /* At this stage in linking, no SEC_MERGE symbol has been
5027 adjusted, so all references to such symbols need to be
5028 passed through _bfd_merged_section_offset. (Later, in
5029 relocate_section, all SEC_MERGE symbols *except* for
5030 section symbols have been adjusted.)
5031
5032 gas may reduce relocations against symbols in SEC_MERGE
5033 sections to a relocation against the section symbol when
5034 the original addend was zero. When the reloc is against
5035 a section symbol we should include the addend in the
5036 offset passed to _bfd_merged_section_offset, since the
5037 location of interest is the original symbol. On the
5038 other hand, an access to "sym+addend" where "sym" is not
5039 a section symbol should not include the addend; Such an
5040 access is presumed to be an offset from "sym"; The
5041 location of interest is just "sym". */
5042 if (sym_type == STT_SECTION)
5043 toff += irel->r_addend;
5044
5045 toff = _bfd_merged_section_offset (abfd, &tsec,
5046 elf_section_data (tsec)->sec_info,
5047 toff);
5048
5049 if (sym_type != STT_SECTION)
5050 toff += irel->r_addend;
5051 }
5052 /* PLTREL24 addends are special. */
5053 else if (r_type != R_PPC_PLTREL24)
5054 toff += irel->r_addend;
5055
5056 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5057
5058 roff = irel->r_offset;
5059 reladdr = isec->output_section->vma + isec->output_offset + roff;
5060
5061 /* If the branch is in range, no need to do anything. */
5062 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5063 continue;
5064
5065 /* Look for an existing fixup to this address. */
5066 for (f = fixups; f ; f = f->next)
5067 if (f->tsec == tsec && f->toff == toff)
5068 break;
5069
5070 if (f == NULL)
5071 {
5072 size_t size;
5073 unsigned long stub_rtype;
5074
5075 val = trampoff - roff;
5076 if (val >= max_branch_offset)
5077 /* Oh dear, we can't reach a trampoline. Don't try to add
5078 one. We'll report an error later. */
5079 continue;
5080
5081 if (link_info->shared)
5082 {
5083 size = 4 * ARRAY_SIZE (shared_stub_entry);
5084 insn_offset = 12;
5085 stub_rtype = R_PPC_RELAX32PC;
5086 }
5087 else
5088 {
5089 size = 4 * ARRAY_SIZE (stub_entry);
5090 insn_offset = 0;
5091 stub_rtype = R_PPC_RELAX32;
5092 }
5093
5094 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5095 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5096 abort ();
5097 if (tsec == htab->plt
5098 || tsec == htab->glink)
5099 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5100
5101 /* Hijack the old relocation. Since we need two
5102 relocations for this use a "composite" reloc. */
5103 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5104 stub_rtype);
5105 irel->r_offset = trampoff + insn_offset;
5106
5107 /* Record the fixup so we don't do it again this section. */
5108 f = bfd_malloc (sizeof (*f));
5109 f->next = fixups;
5110 f->tsec = tsec;
5111 f->toff = toff;
5112 f->trampoff = trampoff;
5113 fixups = f;
5114
5115 trampoff += size;
5116 }
5117 else
5118 {
5119 val = f->trampoff - roff;
5120 if (val >= max_branch_offset)
5121 continue;
5122
5123 /* Nop out the reloc, since we're finalizing things here. */
5124 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5125 }
5126
5127 /* Get the section contents. */
5128 if (contents == NULL)
5129 {
5130 /* Get cached copy if it exists. */
5131 if (elf_section_data (isec)->this_hdr.contents != NULL)
5132 contents = elf_section_data (isec)->this_hdr.contents;
5133 else
5134 {
5135 /* Go get them off disk. */
5136 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5137 goto error_return;
5138 }
5139 }
5140
5141 /* Fix up the existing branch to hit the trampoline. */
5142 hit_addr = contents + roff;
5143 switch (r_type)
5144 {
5145 case R_PPC_REL24:
5146 case R_PPC_LOCAL24PC:
5147 case R_PPC_PLTREL24:
5148 t0 = bfd_get_32 (abfd, hit_addr);
5149 t0 &= ~0x3fffffc;
5150 t0 |= val & 0x3fffffc;
5151 bfd_put_32 (abfd, t0, hit_addr);
5152 break;
5153
5154 case R_PPC_REL14:
5155 case R_PPC_REL14_BRTAKEN:
5156 case R_PPC_REL14_BRNTAKEN:
5157 t0 = bfd_get_32 (abfd, hit_addr);
5158 t0 &= ~0xfffc;
5159 t0 |= val & 0xfffc;
5160 bfd_put_32 (abfd, t0, hit_addr);
5161 break;
5162 }
5163 }
5164
5165 /* Write out the trampolines. */
5166 changed = fixups != NULL;
5167 if (fixups != NULL)
5168 {
5169 const int *stub;
5170 bfd_byte *dest;
5171 bfd_vma val;
5172 int i, size;
5173
5174 do
5175 {
5176 struct one_fixup *f = fixups;
5177 fixups = fixups->next;
5178 free (f);
5179 }
5180 while (fixups);
5181
5182 contents = bfd_realloc (contents, trampoff);
5183 if (contents == NULL)
5184 goto error_return;
5185
5186 isec->size = (isec->size + 3) & (bfd_vma) -4;
5187 /* Branch around the trampolines. */
5188 val = trampoff - isec->size + 0x48000000;
5189 dest = contents + isec->size;
5190 isec->size = trampoff;
5191 bfd_put_32 (abfd, val, dest);
5192 dest += 4;
5193
5194 if (link_info->shared)
5195 {
5196 stub = shared_stub_entry;
5197 size = ARRAY_SIZE (shared_stub_entry);
5198 }
5199 else
5200 {
5201 stub = stub_entry;
5202 size = ARRAY_SIZE (stub_entry);
5203 }
5204
5205 i = 0;
5206 while (dest < contents + trampoff)
5207 {
5208 bfd_put_32 (abfd, stub[i], dest);
5209 i++;
5210 if (i == size)
5211 i = 0;
5212 dest += 4;
5213 }
5214 BFD_ASSERT (i == 0);
5215 }
5216
5217 if (isymbuf != NULL
5218 && symtab_hdr->contents != (unsigned char *) isymbuf)
5219 {
5220 if (! link_info->keep_memory)
5221 free (isymbuf);
5222 else
5223 {
5224 /* Cache the symbols for elf_link_input_bfd. */
5225 symtab_hdr->contents = (unsigned char *) isymbuf;
5226 }
5227 }
5228
5229 if (contents != NULL
5230 && elf_section_data (isec)->this_hdr.contents != contents)
5231 {
5232 if (!changed && !link_info->keep_memory)
5233 free (contents);
5234 else
5235 {
5236 /* Cache the section contents for elf_link_input_bfd. */
5237 elf_section_data (isec)->this_hdr.contents = contents;
5238 }
5239 }
5240
5241 if (elf_section_data (isec)->relocs != internal_relocs)
5242 {
5243 if (!changed)
5244 free (internal_relocs);
5245 else
5246 elf_section_data (isec)->relocs = internal_relocs;
5247 }
5248
5249 *again = changed;
5250 return TRUE;
5251
5252 error_return:
5253 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5254 free (isymbuf);
5255 if (contents != NULL
5256 && elf_section_data (isec)->this_hdr.contents != contents)
5257 free (contents);
5258 if (internal_relocs != NULL
5259 && elf_section_data (isec)->relocs != internal_relocs)
5260 free (internal_relocs);
5261 return FALSE;
5262 }
5263 \f
5264 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
5265 set here rather than via PROVIDE in the default linker script,
5266 because using PROVIDE inside an output section statement results in
5267 unnecessary output sections. Using PROVIDE outside an output section
5268 statement runs the risk of section alignment affecting where the
5269 section starts. */
5270
5271 void
5272 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
5273 {
5274 struct ppc_elf_link_hash_table *htab;
5275 unsigned i;
5276 asection *s;
5277 bfd_vma val;
5278
5279 htab = ppc_elf_hash_table (info);
5280
5281 for (i = 0; i < 2; i++)
5282 {
5283 elf_linker_section_t *lsect = &htab->sdata[i];
5284
5285 s = lsect->section;
5286 if (s != NULL)
5287 s = s->output_section;
5288 if (s == NULL)
5289 s = bfd_get_section_by_name (obfd, lsect->name);
5290 if (s == NULL)
5291 s = bfd_get_section_by_name (obfd, lsect->bss_name);
5292
5293 if (s)
5294 {
5295 /* VxWorks executables are relocatable, so the sdata base symbols
5296 must be section-relative. */
5297 val = 32768;
5298 lsect->sym_val = val + s->vma;
5299 }
5300 else
5301 {
5302 val = 0;
5303 lsect->sym_val = 0;
5304 }
5305
5306 _bfd_elf_provide_symbol (info, lsect->sym_name, val, s);
5307 }
5308 }
5309
5310 /* What to do when ld finds relocations against symbols defined in
5311 discarded sections. */
5312
5313 static unsigned int
5314 ppc_elf_action_discarded (asection *sec)
5315 {
5316 if (strcmp (".fixup", sec->name) == 0)
5317 return 0;
5318
5319 if (strcmp (".got2", sec->name) == 0)
5320 return 0;
5321
5322 return _bfd_elf_default_action_discarded (sec);
5323 }
5324 \f
5325 /* Fill in the address for a pointer generated in a linker section. */
5326
5327 static bfd_vma
5328 elf_finish_pointer_linker_section (bfd *input_bfd,
5329 elf_linker_section_t *lsect,
5330 struct elf_link_hash_entry *h,
5331 bfd_vma relocation,
5332 const Elf_Internal_Rela *rel)
5333 {
5334 elf_linker_section_pointers_t *linker_section_ptr;
5335
5336 BFD_ASSERT (lsect != NULL);
5337
5338 if (h != NULL)
5339 {
5340 /* Handle global symbol. */
5341 struct ppc_elf_link_hash_entry *eh;
5342
5343 eh = (struct ppc_elf_link_hash_entry *) h;
5344 BFD_ASSERT (eh->elf.def_regular);
5345 linker_section_ptr = eh->linker_section_pointer;
5346 }
5347 else
5348 {
5349 /* Handle local symbol. */
5350 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5351
5352 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5353 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5354 }
5355
5356 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5357 rel->r_addend,
5358 lsect);
5359 BFD_ASSERT (linker_section_ptr != NULL);
5360
5361 /* Offset will always be a multiple of four, so use the bottom bit
5362 as a "written" flag. */
5363 if ((linker_section_ptr->offset & 1) == 0)
5364 {
5365 bfd_put_32 (lsect->section->owner,
5366 relocation + linker_section_ptr->addend,
5367 lsect->section->contents + linker_section_ptr->offset);
5368 linker_section_ptr->offset += 1;
5369 }
5370
5371 relocation = (lsect->section->output_offset
5372 + linker_section_ptr->offset - 1
5373 - 0x8000);
5374
5375 #ifdef DEBUG
5376 fprintf (stderr,
5377 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5378 lsect->name, (long) relocation, (long) relocation);
5379 #endif
5380
5381 /* Subtract out the addend, because it will get added back in by the normal
5382 processing. */
5383 return relocation - linker_section_ptr->addend;
5384 }
5385
5386 /* The RELOCATE_SECTION function is called by the ELF backend linker
5387 to handle the relocations for a section.
5388
5389 The relocs are always passed as Rela structures; if the section
5390 actually uses Rel structures, the r_addend field will always be
5391 zero.
5392
5393 This function is responsible for adjust the section contents as
5394 necessary, and (if using Rela relocs and generating a
5395 relocatable output file) adjusting the reloc addend as
5396 necessary.
5397
5398 This function does not have to worry about setting the reloc
5399 address or the reloc symbol index.
5400
5401 LOCAL_SYMS is a pointer to the swapped in local symbols.
5402
5403 LOCAL_SECTIONS is an array giving the section in the input file
5404 corresponding to the st_shndx field of each local symbol.
5405
5406 The global hash table entry for the global symbols can be found
5407 via elf_sym_hashes (input_bfd).
5408
5409 When generating relocatable output, this function must handle
5410 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5411 going to be the section symbol corresponding to the output
5412 section, which means that the addend must be adjusted
5413 accordingly. */
5414
5415 static bfd_boolean
5416 ppc_elf_relocate_section (bfd *output_bfd,
5417 struct bfd_link_info *info,
5418 bfd *input_bfd,
5419 asection *input_section,
5420 bfd_byte *contents,
5421 Elf_Internal_Rela *relocs,
5422 Elf_Internal_Sym *local_syms,
5423 asection **local_sections)
5424 {
5425 Elf_Internal_Shdr *symtab_hdr;
5426 struct elf_link_hash_entry **sym_hashes;
5427 struct ppc_elf_link_hash_table *htab;
5428 Elf_Internal_Rela *rel;
5429 Elf_Internal_Rela *relend;
5430 Elf_Internal_Rela outrel;
5431 bfd_byte *loc;
5432 asection *got2, *sreloc = NULL;
5433 bfd_vma *local_got_offsets;
5434 bfd_boolean ret = TRUE;
5435
5436 #ifdef DEBUG
5437 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5438 "%ld relocations%s",
5439 input_bfd, input_section,
5440 (long) input_section->reloc_count,
5441 (info->relocatable) ? " (relocatable)" : "");
5442 #endif
5443
5444 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5445
5446 if (info->relocatable)
5447 {
5448 if (got2 == NULL)
5449 return TRUE;
5450
5451 rel = relocs;
5452 relend = relocs + input_section->reloc_count;
5453 for (; rel < relend; rel++)
5454 {
5455 enum elf_ppc_reloc_type r_type;
5456
5457 r_type = ELF32_R_TYPE (rel->r_info);
5458 if (r_type == R_PPC_PLTREL24
5459 && rel->r_addend >= 32768)
5460 {
5461 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5462 addend specifies the GOT pointer offset within .got2. */
5463 rel->r_addend += got2->output_offset;
5464 }
5465 }
5466 return TRUE;
5467 }
5468
5469 /* Initialize howto table if not already done. */
5470 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5471 ppc_elf_howto_init ();
5472
5473 htab = ppc_elf_hash_table (info);
5474 local_got_offsets = elf_local_got_offsets (input_bfd);
5475 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5476 sym_hashes = elf_sym_hashes (input_bfd);
5477 rel = relocs;
5478 relend = relocs + input_section->reloc_count;
5479 for (; rel < relend; rel++)
5480 {
5481 enum elf_ppc_reloc_type r_type;
5482 bfd_vma addend;
5483 bfd_reloc_status_type r;
5484 Elf_Internal_Sym *sym;
5485 asection *sec;
5486 struct elf_link_hash_entry *h;
5487 const char *sym_name;
5488 reloc_howto_type *howto;
5489 unsigned long r_symndx;
5490 bfd_vma relocation;
5491 bfd_vma branch_bit, insn, from;
5492 bfd_boolean unresolved_reloc;
5493 bfd_boolean warned;
5494 unsigned int tls_type, tls_mask, tls_gd;
5495
5496 r_type = ELF32_R_TYPE (rel->r_info);
5497 sym = NULL;
5498 sec = NULL;
5499 h = NULL;
5500 unresolved_reloc = FALSE;
5501 warned = FALSE;
5502 r_symndx = ELF32_R_SYM (rel->r_info);
5503
5504 if (r_symndx < symtab_hdr->sh_info)
5505 {
5506 sym = local_syms + r_symndx;
5507 sec = local_sections[r_symndx];
5508 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5509
5510 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5511 }
5512 else
5513 {
5514 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5515 r_symndx, symtab_hdr, sym_hashes,
5516 h, sec, relocation,
5517 unresolved_reloc, warned);
5518
5519 sym_name = h->root.root.string;
5520 }
5521
5522 /* TLS optimizations. Replace instruction sequences and relocs
5523 based on information we collected in tls_optimize. We edit
5524 RELOCS so that --emit-relocs will output something sensible
5525 for the final instruction stream. */
5526 tls_mask = 0;
5527 tls_gd = 0;
5528 if (IS_PPC_TLS_RELOC (r_type))
5529 {
5530 if (h != NULL)
5531 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5532 else if (local_got_offsets != NULL)
5533 {
5534 char *lgot_masks;
5535 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5536 tls_mask = lgot_masks[r_symndx];
5537 }
5538 }
5539
5540 /* Ensure reloc mapping code below stays sane. */
5541 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5542 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5543 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5544 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5545 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5546 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5547 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5548 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5549 abort ();
5550 switch (r_type)
5551 {
5552 default:
5553 break;
5554
5555 case R_PPC_GOT_TPREL16:
5556 case R_PPC_GOT_TPREL16_LO:
5557 if (tls_mask != 0
5558 && (tls_mask & TLS_TPREL) == 0)
5559 {
5560 bfd_vma insn;
5561 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5562 insn &= 31 << 21;
5563 insn |= 0x3c020000; /* addis 0,2,0 */
5564 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5565 r_type = R_PPC_TPREL16_HA;
5566 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5567 }
5568 break;
5569
5570 case R_PPC_TLS:
5571 if (tls_mask != 0
5572 && (tls_mask & TLS_TPREL) == 0)
5573 {
5574 bfd_vma insn, rtra;
5575 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5576 if ((insn & ((31 << 26) | (31 << 11)))
5577 == ((31 << 26) | (2 << 11)))
5578 rtra = insn & ((1 << 26) - (1 << 16));
5579 else if ((insn & ((31 << 26) | (31 << 16)))
5580 == ((31 << 26) | (2 << 16)))
5581 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5582 else
5583 abort ();
5584 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5585 /* add -> addi. */
5586 insn = 14 << 26;
5587 else if ((insn & (31 << 1)) == 23 << 1
5588 && ((insn & (31 << 6)) < 14 << 6
5589 || ((insn & (31 << 6)) >= 16 << 6
5590 && (insn & (31 << 6)) < 24 << 6)))
5591 /* load and store indexed -> dform. */
5592 insn = (32 | ((insn >> 6) & 31)) << 26;
5593 else if ((insn & (31 << 1)) == 21 << 1
5594 && (insn & (0x1a << 6)) == 0)
5595 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5596 insn = (((58 | ((insn >> 6) & 4)) << 26)
5597 | ((insn >> 6) & 1));
5598 else if ((insn & (31 << 1)) == 21 << 1
5599 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5600 /* lwax -> lwa. */
5601 insn = (58 << 26) | 2;
5602 else
5603 abort ();
5604 insn |= rtra;
5605 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5606 r_type = R_PPC_TPREL16_LO;
5607 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5608 /* Was PPC_TLS which sits on insn boundary, now
5609 PPC_TPREL16_LO which is at insn+2. */
5610 rel->r_offset += 2;
5611 }
5612 break;
5613
5614 case R_PPC_GOT_TLSGD16_HI:
5615 case R_PPC_GOT_TLSGD16_HA:
5616 tls_gd = TLS_TPRELGD;
5617 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5618 goto tls_gdld_hi;
5619 break;
5620
5621 case R_PPC_GOT_TLSLD16_HI:
5622 case R_PPC_GOT_TLSLD16_HA:
5623 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5624 {
5625 tls_gdld_hi:
5626 if ((tls_mask & tls_gd) != 0)
5627 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5628 + R_PPC_GOT_TPREL16);
5629 else
5630 {
5631 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5632 rel->r_offset -= 2;
5633 r_type = R_PPC_NONE;
5634 }
5635 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5636 }
5637 break;
5638
5639 case R_PPC_GOT_TLSGD16:
5640 case R_PPC_GOT_TLSGD16_LO:
5641 tls_gd = TLS_TPRELGD;
5642 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5643 goto tls_get_addr_check;
5644 break;
5645
5646 case R_PPC_GOT_TLSLD16:
5647 case R_PPC_GOT_TLSLD16_LO:
5648 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5649 {
5650 tls_get_addr_check:
5651 if (rel + 1 < relend)
5652 {
5653 enum elf_ppc_reloc_type r_type2;
5654 unsigned long r_symndx2;
5655 struct elf_link_hash_entry *h2;
5656 bfd_vma insn1, insn2;
5657 bfd_vma offset;
5658
5659 /* The next instruction should be a call to
5660 __tls_get_addr. Peek at the reloc to be sure. */
5661 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5662 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5663 if (r_symndx2 < symtab_hdr->sh_info
5664 || (r_type2 != R_PPC_REL14
5665 && r_type2 != R_PPC_REL14_BRTAKEN
5666 && r_type2 != R_PPC_REL14_BRNTAKEN
5667 && r_type2 != R_PPC_REL24
5668 && r_type2 != R_PPC_PLTREL24))
5669 break;
5670
5671 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5672 while (h2->root.type == bfd_link_hash_indirect
5673 || h2->root.type == bfd_link_hash_warning)
5674 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5675 if (h2 == NULL || h2 != htab->tls_get_addr)
5676 break;
5677
5678 /* OK, it checks out. Replace the call. */
5679 offset = rel[1].r_offset;
5680 insn1 = bfd_get_32 (output_bfd,
5681 contents + rel->r_offset - 2);
5682 if ((tls_mask & tls_gd) != 0)
5683 {
5684 /* IE */
5685 insn1 &= (1 << 26) - 1;
5686 insn1 |= 32 << 26; /* lwz */
5687 insn2 = 0x7c631214; /* add 3,3,2 */
5688 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5689 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5690 + R_PPC_GOT_TPREL16);
5691 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5692 }
5693 else
5694 {
5695 /* LE */
5696 insn1 = 0x3c620000; /* addis 3,2,0 */
5697 insn2 = 0x38630000; /* addi 3,3,0 */
5698 if (tls_gd == 0)
5699 {
5700 /* Was an LD reloc. */
5701 r_symndx = 0;
5702 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5703 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5704 }
5705 r_type = R_PPC_TPREL16_HA;
5706 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5707 rel[1].r_info = ELF32_R_INFO (r_symndx,
5708 R_PPC_TPREL16_LO);
5709 rel[1].r_offset += 2;
5710 }
5711 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5712 bfd_put_32 (output_bfd, insn2, contents + offset);
5713 if (tls_gd == 0)
5714 {
5715 /* We changed the symbol on an LD reloc. Start over
5716 in order to get h, sym, sec etc. right. */
5717 rel--;
5718 continue;
5719 }
5720 }
5721 }
5722 break;
5723 }
5724
5725 /* Handle other relocations that tweak non-addend part of insn. */
5726 branch_bit = 0;
5727 switch (r_type)
5728 {
5729 default:
5730 break;
5731
5732 /* Branch taken prediction relocations. */
5733 case R_PPC_ADDR14_BRTAKEN:
5734 case R_PPC_REL14_BRTAKEN:
5735 branch_bit = BRANCH_PREDICT_BIT;
5736 /* Fall thru */
5737
5738 /* Branch not taken prediction relocations. */
5739 case R_PPC_ADDR14_BRNTAKEN:
5740 case R_PPC_REL14_BRNTAKEN:
5741 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5742 insn &= ~BRANCH_PREDICT_BIT;
5743 insn |= branch_bit;
5744
5745 from = (rel->r_offset
5746 + input_section->output_offset
5747 + input_section->output_section->vma);
5748
5749 /* Invert 'y' bit if not the default. */
5750 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5751 insn ^= BRANCH_PREDICT_BIT;
5752
5753 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5754 break;
5755 }
5756
5757 addend = rel->r_addend;
5758 tls_type = 0;
5759 howto = NULL;
5760 if (r_type < R_PPC_max)
5761 howto = ppc_elf_howto_table[r_type];
5762 switch (r_type)
5763 {
5764 default:
5765 (*_bfd_error_handler)
5766 (_("%B: unknown relocation type %d for symbol %s"),
5767 input_bfd, (int) r_type, sym_name);
5768
5769 bfd_set_error (bfd_error_bad_value);
5770 ret = FALSE;
5771 continue;
5772
5773 case R_PPC_NONE:
5774 case R_PPC_TLS:
5775 case R_PPC_EMB_MRKREF:
5776 case R_PPC_GNU_VTINHERIT:
5777 case R_PPC_GNU_VTENTRY:
5778 continue;
5779
5780 /* GOT16 relocations. Like an ADDR16 using the symbol's
5781 address in the GOT as relocation value instead of the
5782 symbol's value itself. Also, create a GOT entry for the
5783 symbol and put the symbol value there. */
5784 case R_PPC_GOT_TLSGD16:
5785 case R_PPC_GOT_TLSGD16_LO:
5786 case R_PPC_GOT_TLSGD16_HI:
5787 case R_PPC_GOT_TLSGD16_HA:
5788 tls_type = TLS_TLS | TLS_GD;
5789 goto dogot;
5790
5791 case R_PPC_GOT_TLSLD16:
5792 case R_PPC_GOT_TLSLD16_LO:
5793 case R_PPC_GOT_TLSLD16_HI:
5794 case R_PPC_GOT_TLSLD16_HA:
5795 tls_type = TLS_TLS | TLS_LD;
5796 goto dogot;
5797
5798 case R_PPC_GOT_TPREL16:
5799 case R_PPC_GOT_TPREL16_LO:
5800 case R_PPC_GOT_TPREL16_HI:
5801 case R_PPC_GOT_TPREL16_HA:
5802 tls_type = TLS_TLS | TLS_TPREL;
5803 goto dogot;
5804
5805 case R_PPC_GOT_DTPREL16:
5806 case R_PPC_GOT_DTPREL16_LO:
5807 case R_PPC_GOT_DTPREL16_HI:
5808 case R_PPC_GOT_DTPREL16_HA:
5809 tls_type = TLS_TLS | TLS_DTPREL;
5810 goto dogot;
5811
5812 case R_PPC_GOT16:
5813 case R_PPC_GOT16_LO:
5814 case R_PPC_GOT16_HI:
5815 case R_PPC_GOT16_HA:
5816 dogot:
5817 {
5818 /* Relocation is to the entry for this symbol in the global
5819 offset table. */
5820 bfd_vma off;
5821 bfd_vma *offp;
5822 unsigned long indx;
5823
5824 if (htab->got == NULL)
5825 abort ();
5826
5827 indx = 0;
5828 if (tls_type == (TLS_TLS | TLS_LD)
5829 && (h == NULL
5830 || !h->def_dynamic))
5831 offp = &htab->tlsld_got.offset;
5832 else if (h != NULL)
5833 {
5834 bfd_boolean dyn;
5835 dyn = htab->elf.dynamic_sections_created;
5836 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5837 || (info->shared
5838 && SYMBOL_REFERENCES_LOCAL (info, h)))
5839 /* This is actually a static link, or it is a
5840 -Bsymbolic link and the symbol is defined
5841 locally, or the symbol was forced to be local
5842 because of a version file. */
5843 ;
5844 else
5845 {
5846 indx = h->dynindx;
5847 unresolved_reloc = FALSE;
5848 }
5849 offp = &h->got.offset;
5850 }
5851 else
5852 {
5853 if (local_got_offsets == NULL)
5854 abort ();
5855 offp = &local_got_offsets[r_symndx];
5856 }
5857
5858 /* The offset must always be a multiple of 4. We use the
5859 least significant bit to record whether we have already
5860 processed this entry. */
5861 off = *offp;
5862 if ((off & 1) != 0)
5863 off &= ~1;
5864 else
5865 {
5866 unsigned int tls_m = (tls_mask
5867 & (TLS_LD | TLS_GD | TLS_DTPREL
5868 | TLS_TPREL | TLS_TPRELGD));
5869
5870 if (offp == &htab->tlsld_got.offset)
5871 tls_m = TLS_LD;
5872 else if (h == NULL
5873 || !h->def_dynamic)
5874 tls_m &= ~TLS_LD;
5875
5876 /* We might have multiple got entries for this sym.
5877 Initialize them all. */
5878 do
5879 {
5880 int tls_ty = 0;
5881
5882 if ((tls_m & TLS_LD) != 0)
5883 {
5884 tls_ty = TLS_TLS | TLS_LD;
5885 tls_m &= ~TLS_LD;
5886 }
5887 else if ((tls_m & TLS_GD) != 0)
5888 {
5889 tls_ty = TLS_TLS | TLS_GD;
5890 tls_m &= ~TLS_GD;
5891 }
5892 else if ((tls_m & TLS_DTPREL) != 0)
5893 {
5894 tls_ty = TLS_TLS | TLS_DTPREL;
5895 tls_m &= ~TLS_DTPREL;
5896 }
5897 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5898 {
5899 tls_ty = TLS_TLS | TLS_TPREL;
5900 tls_m = 0;
5901 }
5902
5903 /* Generate relocs for the dynamic linker. */
5904 if ((info->shared || indx != 0)
5905 && (h == NULL
5906 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5907 || h->root.type != bfd_link_hash_undefweak))
5908 {
5909 outrel.r_offset = (htab->got->output_section->vma
5910 + htab->got->output_offset
5911 + off);
5912 outrel.r_addend = 0;
5913 if (tls_ty & (TLS_LD | TLS_GD))
5914 {
5915 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5916 if (tls_ty == (TLS_TLS | TLS_GD))
5917 {
5918 loc = htab->relgot->contents;
5919 loc += (htab->relgot->reloc_count++
5920 * sizeof (Elf32_External_Rela));
5921 bfd_elf32_swap_reloca_out (output_bfd,
5922 &outrel, loc);
5923 outrel.r_offset += 4;
5924 outrel.r_info
5925 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5926 }
5927 }
5928 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5929 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5930 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5931 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5932 else if (indx == 0)
5933 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5934 else
5935 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5936 if (indx == 0)
5937 {
5938 outrel.r_addend += relocation;
5939 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5940 outrel.r_addend -= htab->elf.tls_sec->vma;
5941 }
5942 loc = htab->relgot->contents;
5943 loc += (htab->relgot->reloc_count++
5944 * sizeof (Elf32_External_Rela));
5945 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5946 }
5947
5948 /* Init the .got section contents if we're not
5949 emitting a reloc. */
5950 else
5951 {
5952 bfd_vma value = relocation;
5953
5954 if (tls_ty == (TLS_TLS | TLS_LD))
5955 value = 1;
5956 else if (tls_ty != 0)
5957 {
5958 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5959 if (tls_ty == (TLS_TLS | TLS_TPREL))
5960 value += DTP_OFFSET - TP_OFFSET;
5961
5962 if (tls_ty == (TLS_TLS | TLS_GD))
5963 {
5964 bfd_put_32 (output_bfd, value,
5965 htab->got->contents + off + 4);
5966 value = 1;
5967 }
5968 }
5969 bfd_put_32 (output_bfd, value,
5970 htab->got->contents + off);
5971 }
5972
5973 off += 4;
5974 if (tls_ty & (TLS_LD | TLS_GD))
5975 off += 4;
5976 }
5977 while (tls_m != 0);
5978
5979 off = *offp;
5980 *offp = off | 1;
5981 }
5982
5983 if (off >= (bfd_vma) -2)
5984 abort ();
5985
5986 if ((tls_type & TLS_TLS) != 0)
5987 {
5988 if (tls_type != (TLS_TLS | TLS_LD))
5989 {
5990 if ((tls_mask & TLS_LD) != 0
5991 && !(h == NULL
5992 || !h->def_dynamic))
5993 off += 8;
5994 if (tls_type != (TLS_TLS | TLS_GD))
5995 {
5996 if ((tls_mask & TLS_GD) != 0)
5997 off += 8;
5998 if (tls_type != (TLS_TLS | TLS_DTPREL))
5999 {
6000 if ((tls_mask & TLS_DTPREL) != 0)
6001 off += 4;
6002 }
6003 }
6004 }
6005 }
6006
6007 relocation = htab->got->output_offset + off;
6008 relocation -= htab->elf.hgot->root.u.def.value;
6009
6010 /* Addends on got relocations don't make much sense.
6011 x+off@got is actually x@got+off, and since the got is
6012 generated by a hash table traversal, the value in the
6013 got at entry m+n bears little relation to the entry m. */
6014 if (addend != 0)
6015 (*_bfd_error_handler)
6016 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6017 input_bfd,
6018 input_section,
6019 (long) rel->r_offset,
6020 howto->name,
6021 sym_name);
6022 }
6023 break;
6024
6025 /* Relocations that need no special processing. */
6026 case R_PPC_LOCAL24PC:
6027 /* It makes no sense to point a local relocation
6028 at a symbol not in this object. */
6029 if (unresolved_reloc)
6030 {
6031 if (! (*info->callbacks->undefined_symbol) (info,
6032 h->root.root.string,
6033 input_bfd,
6034 input_section,
6035 rel->r_offset,
6036 TRUE))
6037 return FALSE;
6038 continue;
6039 }
6040 break;
6041
6042 case R_PPC_DTPREL16:
6043 case R_PPC_DTPREL16_LO:
6044 case R_PPC_DTPREL16_HI:
6045 case R_PPC_DTPREL16_HA:
6046 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6047 break;
6048
6049 /* Relocations that may need to be propagated if this is a shared
6050 object. */
6051 case R_PPC_TPREL16:
6052 case R_PPC_TPREL16_LO:
6053 case R_PPC_TPREL16_HI:
6054 case R_PPC_TPREL16_HA:
6055 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6056 /* The TPREL16 relocs shouldn't really be used in shared
6057 libs as they will result in DT_TEXTREL being set, but
6058 support them anyway. */
6059 goto dodyn;
6060
6061 case R_PPC_TPREL32:
6062 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6063 goto dodyn;
6064
6065 case R_PPC_DTPREL32:
6066 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6067 goto dodyn;
6068
6069 case R_PPC_DTPMOD32:
6070 relocation = 1;
6071 addend = 0;
6072 goto dodyn;
6073
6074 case R_PPC_REL16:
6075 case R_PPC_REL16_LO:
6076 case R_PPC_REL16_HI:
6077 case R_PPC_REL16_HA:
6078 break;
6079
6080 case R_PPC_REL24:
6081 case R_PPC_REL32:
6082 case R_PPC_REL14:
6083 case R_PPC_REL14_BRTAKEN:
6084 case R_PPC_REL14_BRNTAKEN:
6085 /* If these relocations are not to a named symbol, they can be
6086 handled right here, no need to bother the dynamic linker. */
6087 if (SYMBOL_REFERENCES_LOCAL (info, h)
6088 || h == htab->elf.hgot)
6089 break;
6090 /* fall through */
6091
6092 /* Relocations that always need to be propagated if this is a shared
6093 object. */
6094 case R_PPC_ADDR32:
6095 case R_PPC_ADDR24:
6096 case R_PPC_ADDR16:
6097 case R_PPC_ADDR16_LO:
6098 case R_PPC_ADDR16_HI:
6099 case R_PPC_ADDR16_HA:
6100 case R_PPC_ADDR14:
6101 case R_PPC_ADDR14_BRTAKEN:
6102 case R_PPC_ADDR14_BRNTAKEN:
6103 case R_PPC_UADDR32:
6104 case R_PPC_UADDR16:
6105 /* r_symndx will be zero only for relocs against symbols
6106 from removed linkonce sections, or sections discarded by
6107 a linker script. */
6108 dodyn:
6109 if (r_symndx == 0)
6110 break;
6111 /* Fall thru. */
6112
6113 if ((input_section->flags & SEC_ALLOC) == 0)
6114 break;
6115 /* Fall thru. */
6116
6117 if ((info->shared
6118 && (h == NULL
6119 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6120 || h->root.type != bfd_link_hash_undefweak)
6121 && (MUST_BE_DYN_RELOC (r_type)
6122 || !SYMBOL_CALLS_LOCAL (info, h)))
6123 || (ELIMINATE_COPY_RELOCS
6124 && !info->shared
6125 && h != NULL
6126 && h->dynindx != -1
6127 && !h->non_got_ref
6128 && h->def_dynamic
6129 && !h->def_regular))
6130 {
6131 int skip;
6132
6133 #ifdef DEBUG
6134 fprintf (stderr, "ppc_elf_relocate_section needs to "
6135 "create relocation for %s\n",
6136 (h && h->root.root.string
6137 ? h->root.root.string : "<unknown>"));
6138 #endif
6139
6140 /* When generating a shared object, these relocations
6141 are copied into the output file to be resolved at run
6142 time. */
6143 if (sreloc == NULL)
6144 {
6145 const char *name;
6146
6147 name = (bfd_elf_string_from_elf_section
6148 (input_bfd,
6149 elf_elfheader (input_bfd)->e_shstrndx,
6150 elf_section_data (input_section)->rel_hdr.sh_name));
6151 if (name == NULL)
6152 return FALSE;
6153
6154 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6155 && strcmp (bfd_get_section_name (input_bfd,
6156 input_section),
6157 name + 5) == 0);
6158
6159 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6160 BFD_ASSERT (sreloc != NULL);
6161 }
6162
6163 skip = 0;
6164
6165 outrel.r_offset =
6166 _bfd_elf_section_offset (output_bfd, info, input_section,
6167 rel->r_offset);
6168 if (outrel.r_offset == (bfd_vma) -1
6169 || outrel.r_offset == (bfd_vma) -2)
6170 skip = (int) outrel.r_offset;
6171 outrel.r_offset += (input_section->output_section->vma
6172 + input_section->output_offset);
6173
6174 if (skip)
6175 memset (&outrel, 0, sizeof outrel);
6176 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6177 {
6178 unresolved_reloc = FALSE;
6179 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6180 outrel.r_addend = rel->r_addend;
6181 }
6182 else
6183 {
6184 outrel.r_addend = relocation + rel->r_addend;
6185
6186 if (r_type == R_PPC_ADDR32)
6187 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6188 else
6189 {
6190 long indx;
6191
6192 if (bfd_is_abs_section (sec))
6193 indx = 0;
6194 else if (sec == NULL || sec->owner == NULL)
6195 {
6196 bfd_set_error (bfd_error_bad_value);
6197 return FALSE;
6198 }
6199 else
6200 {
6201 asection *osec;
6202
6203 /* We are turning this relocation into one
6204 against a section symbol. It would be
6205 proper to subtract the symbol's value,
6206 osec->vma, from the emitted reloc addend,
6207 but ld.so expects buggy relocs. */
6208 osec = sec->output_section;
6209 indx = elf_section_data (osec)->dynindx;
6210 BFD_ASSERT (indx > 0);
6211 #ifdef DEBUG
6212 if (indx <= 0)
6213 printf ("indx=%d section=%s flags=%08x name=%s\n",
6214 indx, osec->name, osec->flags,
6215 h->root.root.string);
6216 #endif
6217 }
6218
6219 outrel.r_info = ELF32_R_INFO (indx, r_type);
6220 }
6221 }
6222
6223 loc = sreloc->contents;
6224 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6225 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6226
6227 if (skip == -1)
6228 continue;
6229
6230 /* This reloc will be computed at runtime. We clear the memory
6231 so that it contains predictable value. */
6232 if (! skip
6233 && ((input_section->flags & SEC_ALLOC) != 0
6234 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6235 {
6236 relocation = howto->pc_relative ? outrel.r_offset : 0;
6237 addend = 0;
6238 break;
6239 }
6240 }
6241 break;
6242
6243 case R_PPC_RELAX32PC_PLT:
6244 case R_PPC_RELAX32_PLT:
6245 {
6246 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6247
6248 if (!htab->old_plt)
6249 relocation = (htab->glink->output_section->vma
6250 + htab->glink->output_offset
6251 + ent->glink_offset);
6252 else
6253 relocation = (htab->plt->output_section->vma
6254 + htab->plt->output_offset
6255 + ent->plt.offset);
6256 addend = 0;
6257 }
6258 if (r_type == R_PPC_RELAX32_PLT)
6259 goto relax32;
6260 /* Fall thru */
6261
6262 case R_PPC_RELAX32PC:
6263 relocation -= (input_section->output_section->vma
6264 + input_section->output_offset
6265 + rel->r_offset - 4);
6266 /* Fall thru */
6267
6268 case R_PPC_RELAX32:
6269 relax32:
6270 {
6271 unsigned long t0;
6272 unsigned long t1;
6273
6274 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6275 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6276
6277 /* We're clearing the bits for R_PPC_ADDR16_HA
6278 and R_PPC_ADDR16_LO here. */
6279 t0 &= ~0xffff;
6280 t1 &= ~0xffff;
6281
6282 /* t0 is HA, t1 is LO */
6283 relocation += addend;
6284 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6285 t1 |= relocation & 0xffff;
6286
6287 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6288 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6289 }
6290 continue;
6291
6292 /* Indirect .sdata relocation. */
6293 case R_PPC_EMB_SDAI16:
6294 BFD_ASSERT (htab->sdata[0].section != NULL);
6295 relocation
6296 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6297 h, relocation, rel);
6298 break;
6299
6300 /* Indirect .sdata2 relocation. */
6301 case R_PPC_EMB_SDA2I16:
6302 BFD_ASSERT (htab->sdata[1].section != NULL);
6303 relocation
6304 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6305 h, relocation, rel);
6306 break;
6307
6308 /* Handle the TOC16 reloc. We want to use the offset within the .got
6309 section, not the actual VMA. This is appropriate when generating
6310 an embedded ELF object, for which the .got section acts like the
6311 AIX .toc section. */
6312 case R_PPC_TOC16: /* phony GOT16 relocations */
6313 BFD_ASSERT (sec != NULL);
6314 BFD_ASSERT (bfd_is_und_section (sec)
6315 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6316 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6317
6318 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6319 break;
6320
6321 case R_PPC_PLTREL24:
6322 /* Relocation is to the entry for this symbol in the
6323 procedure linkage table. */
6324 {
6325 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6326
6327 addend = 0;
6328 if (ent == NULL
6329 || htab->plt == NULL)
6330 {
6331 /* We didn't make a PLT entry for this symbol. This
6332 happens when statically linking PIC code, or when
6333 using -Bsymbolic. */
6334 break;
6335 }
6336
6337 unresolved_reloc = FALSE;
6338 if (!htab->old_plt)
6339 relocation = (htab->glink->output_section->vma
6340 + htab->glink->output_offset
6341 + ent->glink_offset);
6342 else
6343 relocation = (htab->plt->output_section->vma
6344 + htab->plt->output_offset
6345 + ent->plt.offset);
6346 }
6347 break;
6348
6349 /* Relocate against _SDA_BASE_. */
6350 case R_PPC_SDAREL16:
6351 {
6352 const char *name;
6353
6354 BFD_ASSERT (sec != NULL);
6355 name = bfd_get_section_name (abfd, sec->output_section);
6356 if (! ((strncmp (name, ".sdata", 6) == 0
6357 && (name[6] == 0 || name[6] == '.'))
6358 || (strncmp (name, ".sbss", 5) == 0
6359 && (name[5] == 0 || name[5] == '.'))))
6360 {
6361 (*_bfd_error_handler)
6362 (_("%B: the target (%s) of a %s relocation is "
6363 "in the wrong output section (%s)"),
6364 input_bfd,
6365 sym_name,
6366 howto->name,
6367 name);
6368 }
6369 addend -= htab->sdata[0].sym_val;
6370 }
6371 break;
6372
6373 /* Relocate against _SDA2_BASE_. */
6374 case R_PPC_EMB_SDA2REL:
6375 {
6376 const char *name;
6377
6378 BFD_ASSERT (sec != NULL);
6379 name = bfd_get_section_name (abfd, sec->output_section);
6380 if (! (strncmp (name, ".sdata2", 7) == 0
6381 || strncmp (name, ".sbss2", 6) == 0))
6382 {
6383 (*_bfd_error_handler)
6384 (_("%B: the target (%s) of a %s relocation is "
6385 "in the wrong output section (%s)"),
6386 input_bfd,
6387 sym_name,
6388 howto->name,
6389 name);
6390
6391 bfd_set_error (bfd_error_bad_value);
6392 ret = FALSE;
6393 continue;
6394 }
6395 addend -= htab->sdata[1].sym_val;
6396 }
6397 break;
6398
6399 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6400 case R_PPC_EMB_SDA21:
6401 case R_PPC_EMB_RELSDA:
6402 {
6403 const char *name;
6404 int reg;
6405
6406 BFD_ASSERT (sec != NULL);
6407 name = bfd_get_section_name (abfd, sec->output_section);
6408 if (((strncmp (name, ".sdata", 6) == 0
6409 && (name[6] == 0 || name[6] == '.'))
6410 || (strncmp (name, ".sbss", 5) == 0
6411 && (name[5] == 0 || name[5] == '.'))))
6412 {
6413 reg = 13;
6414 addend -= htab->sdata[0].sym_val;
6415 }
6416
6417 else if (strncmp (name, ".sdata2", 7) == 0
6418 || strncmp (name, ".sbss2", 6) == 0)
6419 {
6420 reg = 2;
6421 addend -= htab->sdata[1].sym_val;
6422 }
6423
6424 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6425 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6426 {
6427 reg = 0;
6428 }
6429
6430 else
6431 {
6432 (*_bfd_error_handler)
6433 (_("%B: the target (%s) of a %s relocation is "
6434 "in the wrong output section (%s)"),
6435 input_bfd,
6436 sym_name,
6437 howto->name,
6438 name);
6439
6440 bfd_set_error (bfd_error_bad_value);
6441 ret = FALSE;
6442 continue;
6443 }
6444
6445 if (r_type == R_PPC_EMB_SDA21)
6446 { /* fill in register field */
6447 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6448 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6449 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6450 }
6451 }
6452 break;
6453
6454 /* Relocate against the beginning of the section. */
6455 case R_PPC_SECTOFF:
6456 case R_PPC_SECTOFF_LO:
6457 case R_PPC_SECTOFF_HI:
6458 case R_PPC_SECTOFF_HA:
6459 BFD_ASSERT (sec != NULL);
6460 addend -= sec->output_section->vma;
6461 break;
6462
6463 /* Negative relocations. */
6464 case R_PPC_EMB_NADDR32:
6465 case R_PPC_EMB_NADDR16:
6466 case R_PPC_EMB_NADDR16_LO:
6467 case R_PPC_EMB_NADDR16_HI:
6468 case R_PPC_EMB_NADDR16_HA:
6469 addend -= 2 * relocation;
6470 break;
6471
6472 case R_PPC_COPY:
6473 case R_PPC_GLOB_DAT:
6474 case R_PPC_JMP_SLOT:
6475 case R_PPC_RELATIVE:
6476 case R_PPC_PLT32:
6477 case R_PPC_PLTREL32:
6478 case R_PPC_PLT16_LO:
6479 case R_PPC_PLT16_HI:
6480 case R_PPC_PLT16_HA:
6481 case R_PPC_ADDR30:
6482 case R_PPC_EMB_RELSEC16:
6483 case R_PPC_EMB_RELST_LO:
6484 case R_PPC_EMB_RELST_HI:
6485 case R_PPC_EMB_RELST_HA:
6486 case R_PPC_EMB_BIT_FLD:
6487 (*_bfd_error_handler)
6488 (_("%B: relocation %s is not yet supported for symbol %s."),
6489 input_bfd,
6490 howto->name,
6491 sym_name);
6492
6493 bfd_set_error (bfd_error_invalid_operation);
6494 ret = FALSE;
6495 continue;
6496 }
6497
6498 /* Do any further special processing. */
6499 switch (r_type)
6500 {
6501 default:
6502 break;
6503
6504 case R_PPC_ADDR16_HA:
6505 case R_PPC_REL16_HA:
6506 case R_PPC_GOT16_HA:
6507 case R_PPC_PLT16_HA:
6508 case R_PPC_SECTOFF_HA:
6509 case R_PPC_TPREL16_HA:
6510 case R_PPC_DTPREL16_HA:
6511 case R_PPC_GOT_TLSGD16_HA:
6512 case R_PPC_GOT_TLSLD16_HA:
6513 case R_PPC_GOT_TPREL16_HA:
6514 case R_PPC_GOT_DTPREL16_HA:
6515 case R_PPC_EMB_NADDR16_HA:
6516 case R_PPC_EMB_RELST_HA:
6517 /* It's just possible that this symbol is a weak symbol
6518 that's not actually defined anywhere. In that case,
6519 'sec' would be NULL, and we should leave the symbol
6520 alone (it will be set to zero elsewhere in the link). */
6521 if (sec != NULL)
6522 /* Add 0x10000 if sign bit in 0:15 is set.
6523 Bits 0:15 are not used. */
6524 addend += 0x8000;
6525 break;
6526 }
6527
6528 #ifdef DEBUG
6529 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6530 "offset = %ld, addend = %ld\n",
6531 howto->name,
6532 (int) r_type,
6533 sym_name,
6534 r_symndx,
6535 (long) rel->r_offset,
6536 (long) addend);
6537 #endif
6538
6539 if (unresolved_reloc
6540 && !((input_section->flags & SEC_DEBUGGING) != 0
6541 && h->def_dynamic))
6542 {
6543 (*_bfd_error_handler)
6544 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6545 input_bfd,
6546 input_section,
6547 (long) rel->r_offset,
6548 howto->name,
6549 sym_name);
6550 ret = FALSE;
6551 }
6552
6553 r = _bfd_final_link_relocate (howto,
6554 input_bfd,
6555 input_section,
6556 contents,
6557 rel->r_offset,
6558 relocation,
6559 addend);
6560
6561 if (r != bfd_reloc_ok)
6562 {
6563 if (r == bfd_reloc_overflow)
6564 {
6565 if (warned)
6566 continue;
6567 if (h != NULL
6568 && h->root.type == bfd_link_hash_undefweak
6569 && howto->pc_relative)
6570 {
6571 /* Assume this is a call protected by other code that
6572 detect the symbol is undefined. If this is the case,
6573 we can safely ignore the overflow. If not, the
6574 program is hosed anyway, and a little warning isn't
6575 going to help. */
6576
6577 continue;
6578 }
6579
6580 if (! (*info->callbacks->reloc_overflow) (info,
6581 (h ? &h->root : NULL),
6582 sym_name,
6583 howto->name,
6584 rel->r_addend,
6585 input_bfd,
6586 input_section,
6587 rel->r_offset))
6588 return FALSE;
6589 }
6590 else
6591 {
6592 (*_bfd_error_handler)
6593 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6594 input_bfd, input_section,
6595 (long) rel->r_offset, howto->name, sym_name, (int) r);
6596 ret = FALSE;
6597 }
6598 }
6599 }
6600
6601 #ifdef DEBUG
6602 fprintf (stderr, "\n");
6603 #endif
6604
6605 return ret;
6606 }
6607 \f
6608 #define PPC_LO(v) ((v) & 0xffff)
6609 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6610 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6611
6612 /* Finish up dynamic symbol handling. We set the contents of various
6613 dynamic sections here. */
6614
6615 static bfd_boolean
6616 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6617 struct bfd_link_info *info,
6618 struct elf_link_hash_entry *h,
6619 Elf_Internal_Sym *sym)
6620 {
6621 struct ppc_elf_link_hash_table *htab;
6622 struct plt_entry *ent;
6623 bfd_boolean doneone;
6624
6625 #ifdef DEBUG
6626 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6627 h->root.root.string);
6628 #endif
6629
6630 htab = ppc_elf_hash_table (info);
6631 BFD_ASSERT (htab->elf.dynobj != NULL);
6632
6633 doneone = FALSE;
6634 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6635 if (ent->plt.offset != (bfd_vma) -1)
6636 {
6637 if (!doneone)
6638 {
6639 Elf_Internal_Rela rela;
6640 bfd_byte *loc;
6641 bfd_vma reloc_index;
6642
6643 if (!(htab->old_plt || htab->is_vxworks))
6644 reloc_index = ent->plt.offset / 4;
6645 else
6646 {
6647 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6648 / htab->plt_slot_size);
6649 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6650 && !htab->is_vxworks)
6651 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6652 }
6653
6654 /* This symbol has an entry in the procedure linkage table.
6655 Set it up. */
6656 if (htab->is_vxworks)
6657 {
6658 bfd_vma got_offset;
6659 const bfd_vma *plt_entry;
6660
6661 /* The first three entries in .got.plt are reserved. */
6662 got_offset = (reloc_index + 3) * 4;
6663
6664 /* Use the right PLT. */
6665 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6666 : ppc_elf_vxworks_plt_entry;
6667
6668 /* Fill in the .plt on VxWorks. */
6669 if (info->shared)
6670 {
6671 bfd_vma got_offset_hi = (got_offset >> 16)
6672 + ((got_offset & 0x8000) >> 15);
6673
6674 bfd_put_32 (output_bfd,
6675 plt_entry[0] | (got_offset_hi & 0xffff),
6676 htab->plt->contents + ent->plt.offset + 0);
6677 bfd_put_32 (output_bfd,
6678 plt_entry[1] | (got_offset & 0xffff),
6679 htab->plt->contents + ent->plt.offset + 4);
6680 }
6681 else
6682 {
6683 bfd_vma got_loc = (got_offset
6684 + htab->hgot->root.u.def.value
6685 + htab->hgot->root.u.def.section->output_offset
6686 + htab->hgot->root.u.def.section->output_section->vma);
6687 bfd_vma got_loc_hi = (got_loc >> 16)
6688 + ((got_loc & 0x8000) >> 15);
6689
6690 bfd_put_32 (output_bfd,
6691 plt_entry[0] | (got_loc_hi & 0xffff),
6692 htab->plt->contents + ent->plt.offset + 0);
6693 bfd_put_32 (output_bfd,
6694 plt_entry[1] | (got_loc & 0xffff),
6695 htab->plt->contents + ent->plt.offset + 4);
6696 }
6697
6698 bfd_put_32 (output_bfd, plt_entry[2],
6699 htab->plt->contents + ent->plt.offset + 8);
6700 bfd_put_32 (output_bfd, plt_entry[3],
6701 htab->plt->contents + ent->plt.offset + 12);
6702
6703 /* This instruction is an immediate load. The value loaded is
6704 the byte offset of the R_PPC_JMP_SLOT relocation from the
6705 start of the .rela.plt section. The value is stored in the
6706 low-order 16 bits of the load instruction. */
6707 /* NOTE: It appears that this is now an index rather than a
6708 prescaled offset. */
6709 bfd_put_32 (output_bfd,
6710 plt_entry[4] | reloc_index,
6711 htab->plt->contents + ent->plt.offset + 16);
6712 /* This instruction is a PC-relative branch whose target is
6713 the start of the PLT section. The address of this branch
6714 instruction is 20 bytes beyond the start of this PLT entry.
6715 The address is encoded in bits 6-29, inclusive. The value
6716 stored is right-shifted by two bits, permitting a 26-bit
6717 offset. */
6718 bfd_put_32 (output_bfd,
6719 (plt_entry[5]
6720 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6721 htab->plt->contents + ent->plt.offset + 20);
6722 bfd_put_32 (output_bfd, plt_entry[6],
6723 htab->plt->contents + ent->plt.offset + 24);
6724 bfd_put_32 (output_bfd, plt_entry[7],
6725 htab->plt->contents + ent->plt.offset + 28);
6726
6727 /* Fill in the GOT entry corresponding to this PLT slot with
6728 the address immediately after the the "bctr" instruction
6729 in this PLT entry. */
6730 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6731 + htab->plt->output_offset
6732 + ent->plt.offset + 16),
6733 htab->sgotplt->contents + got_offset);
6734
6735 if (!info->shared)
6736 {
6737 /* Fill in a couple of entries in .rela.plt.unloaded. */
6738 loc = htab->srelplt2->contents
6739 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6740 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6741 * sizeof (Elf32_External_Rela));
6742
6743 /* Provide the @ha relocation for the first instruction. */
6744 rela.r_offset = (htab->plt->output_section->vma
6745 + htab->plt->output_offset
6746 + ent->plt.offset + 2);
6747 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6748 R_PPC_ADDR16_HA);
6749 rela.r_addend = got_offset;
6750 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6751 loc += sizeof (Elf32_External_Rela);
6752
6753 /* Provide the @l relocation for the second instruction. */
6754 rela.r_offset = (htab->plt->output_section->vma
6755 + htab->plt->output_offset
6756 + ent->plt.offset + 6);
6757 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6758 R_PPC_ADDR16_LO);
6759 rela.r_addend = got_offset;
6760 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6761 loc += sizeof (Elf32_External_Rela);
6762
6763 /* Provide a relocation for the GOT entry corresponding to this
6764 PLT slot. Point it at the middle of the .plt entry. */
6765 rela.r_offset = (htab->sgotplt->output_section->vma
6766 + htab->sgotplt->output_offset
6767 + got_offset);
6768 rela.r_info = ELF32_R_INFO (htab->hplt->indx,
6769 R_PPC_ADDR32);
6770 rela.r_addend = ent->plt.offset + 16;
6771 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6772 }
6773
6774 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6775 In particular, the offset for the relocation is not the
6776 address of the PLT entry for this function, as specified
6777 by the ABI. Instead, the offset is set to the address of
6778 the GOT slot for this function. See EABI 4.4.4.1. */
6779 rela.r_offset = (htab->sgotplt->output_section->vma
6780 + htab->sgotplt->output_offset
6781 + got_offset);
6782
6783 }
6784 else
6785 {
6786 rela.r_offset = (htab->plt->output_section->vma
6787 + htab->plt->output_offset
6788 + ent->plt.offset);
6789 if (htab->old_plt)
6790 {
6791 /* We don't need to fill in the .plt. The ppc dynamic
6792 linker will fill it in. */
6793 }
6794 else
6795 {
6796 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6797 + htab->glink->output_section->vma
6798 + htab->glink->output_offset);
6799 bfd_put_32 (output_bfd, val,
6800 htab->plt->contents + ent->plt.offset);
6801 }
6802 }
6803
6804 /* Fill in the entry in the .rela.plt section. */
6805 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6806 rela.r_addend = 0;
6807
6808 loc = (htab->relplt->contents
6809 + reloc_index * sizeof (Elf32_External_Rela));
6810 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6811
6812 if (!h->def_regular)
6813 {
6814 /* Mark the symbol as undefined, rather than as defined in
6815 the .plt section. Leave the value alone. */
6816 sym->st_shndx = SHN_UNDEF;
6817 /* If the symbol is weak, we do need to clear the value.
6818 Otherwise, the PLT entry would provide a definition for
6819 the symbol even if the symbol wasn't defined anywhere,
6820 and so the symbol would never be NULL. */
6821 if (!h->ref_regular_nonweak)
6822 sym->st_value = 0;
6823 }
6824 doneone = TRUE;
6825 }
6826
6827 if (!htab->old_plt)
6828 {
6829 bfd_vma plt;
6830 unsigned char *p;
6831
6832 plt = (ent->plt.offset
6833 + htab->plt->output_section->vma
6834 + htab->plt->output_offset);
6835 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6836
6837 if (info->shared || info->pie)
6838 {
6839 bfd_vma got = 0;
6840
6841 if (ent->addend >= 32768)
6842 got = (ent->addend
6843 + ent->sec->output_section->vma
6844 + ent->sec->output_offset);
6845 else if (htab->elf.hgot != NULL)
6846 got = (htab->elf.hgot->root.u.def.value
6847 + htab->elf.hgot->root.u.def.section->output_section->vma
6848 + htab->elf.hgot->root.u.def.section->output_offset);
6849
6850 plt -= got;
6851
6852 if (plt + 0x8000 < 0x10000)
6853 {
6854 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6855 p += 4;
6856 bfd_put_32 (output_bfd, MTCTR_11, p);
6857 p += 4;
6858 bfd_put_32 (output_bfd, BCTR, p);
6859 p += 4;
6860 bfd_put_32 (output_bfd, NOP, p);
6861 p += 4;
6862 }
6863 else
6864 {
6865 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6866 p += 4;
6867 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6868 p += 4;
6869 bfd_put_32 (output_bfd, MTCTR_11, p);
6870 p += 4;
6871 bfd_put_32 (output_bfd, BCTR, p);
6872 p += 4;
6873 }
6874 }
6875 else
6876 {
6877 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6878 p += 4;
6879 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6880 p += 4;
6881 bfd_put_32 (output_bfd, MTCTR_11, p);
6882 p += 4;
6883 bfd_put_32 (output_bfd, BCTR, p);
6884 p += 4;
6885
6886 /* We only need one non-PIC glink stub. */
6887 break;
6888 }
6889 }
6890 else
6891 break;
6892 }
6893
6894 if (h->needs_copy)
6895 {
6896 asection *s;
6897 Elf_Internal_Rela rela;
6898 bfd_byte *loc;
6899
6900 /* This symbols needs a copy reloc. Set it up. */
6901
6902 #ifdef DEBUG
6903 fprintf (stderr, ", copy");
6904 #endif
6905
6906 BFD_ASSERT (h->dynindx != -1);
6907
6908 if (ppc_elf_hash_entry (h)->has_sda_refs)
6909 s = htab->relsbss;
6910 else
6911 s = htab->relbss;
6912 BFD_ASSERT (s != NULL);
6913
6914 rela.r_offset = (h->root.u.def.value
6915 + h->root.u.def.section->output_section->vma
6916 + h->root.u.def.section->output_offset);
6917 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
6918 rela.r_addend = 0;
6919 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6920 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6921 }
6922
6923 #ifdef DEBUG
6924 fprintf (stderr, "\n");
6925 #endif
6926
6927 /* Mark some specially defined symbols as absolute. */
6928 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6929 || (!htab->is_vxworks
6930 && (h == htab->elf.hgot
6931 || strcmp (h->root.root.string,
6932 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
6933 sym->st_shndx = SHN_ABS;
6934
6935 return TRUE;
6936 }
6937 \f
6938 static enum elf_reloc_type_class
6939 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
6940 {
6941 switch (ELF32_R_TYPE (rela->r_info))
6942 {
6943 case R_PPC_RELATIVE:
6944 return reloc_class_relative;
6945 case R_PPC_REL24:
6946 case R_PPC_ADDR24:
6947 case R_PPC_JMP_SLOT:
6948 return reloc_class_plt;
6949 case R_PPC_COPY:
6950 return reloc_class_copy;
6951 default:
6952 return reloc_class_normal;
6953 }
6954 }
6955 \f
6956 /* Finish up the dynamic sections. */
6957
6958 static bfd_boolean
6959 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
6960 struct bfd_link_info *info)
6961 {
6962 asection *sdyn;
6963 asection *splt;
6964 struct ppc_elf_link_hash_table *htab;
6965 bfd_vma got;
6966 bfd * dynobj;
6967
6968 #ifdef DEBUG
6969 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
6970 #endif
6971
6972 htab = ppc_elf_hash_table (info);
6973 dynobj = elf_hash_table (info)->dynobj;
6974 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6975 if (htab->is_vxworks)
6976 splt = bfd_get_section_by_name (dynobj, ".plt");
6977 else
6978 splt = NULL;
6979
6980 got = 0;
6981 if (htab->elf.hgot != NULL)
6982 got = (htab->elf.hgot->root.u.def.value
6983 + htab->elf.hgot->root.u.def.section->output_section->vma
6984 + htab->elf.hgot->root.u.def.section->output_offset);
6985
6986 if (htab->elf.dynamic_sections_created)
6987 {
6988 Elf32_External_Dyn *dyncon, *dynconend;
6989
6990 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
6991
6992 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6993 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6994 for (; dyncon < dynconend; dyncon++)
6995 {
6996 Elf_Internal_Dyn dyn;
6997 asection *s;
6998
6999 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
7000
7001 switch (dyn.d_tag)
7002 {
7003 case DT_PLTGOT:
7004 if (htab->is_vxworks)
7005 s = htab->sgotplt;
7006 else
7007 s = htab->plt;
7008 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7009 break;
7010
7011 case DT_PLTRELSZ:
7012 dyn.d_un.d_val = htab->relplt->size;
7013 break;
7014
7015 case DT_JMPREL:
7016 s = htab->relplt;
7017 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7018 break;
7019
7020 case DT_PPC_GOT:
7021 dyn.d_un.d_ptr = got;
7022 break;
7023
7024 case DT_RELASZ:
7025 if (htab->is_vxworks)
7026 {
7027 if (htab->relplt)
7028 dyn.d_un.d_ptr -= htab->relplt->size;
7029 break;
7030 }
7031 continue;
7032
7033 default:
7034 continue;
7035 }
7036
7037 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7038 }
7039 }
7040
7041 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7042 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7043 if (htab->got != NULL)
7044 {
7045 unsigned char *p = htab->got->contents;
7046 bfd_vma val;
7047
7048 p += elf_hash_table (info)->hgot->root.u.def.value;
7049 if (htab->old_plt && !htab->is_vxworks)
7050 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7051
7052 val = 0;
7053 if (sdyn != NULL)
7054 val = sdyn->output_section->vma + sdyn->output_offset;
7055 bfd_put_32 (output_bfd, val, p);
7056
7057 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7058 }
7059
7060 /* Fill in the first entry in the VxWorks procedure linkage table. */
7061 if (splt && splt->size > 0)
7062 {
7063 /* Use the right PLT. */
7064 static const bfd_vma *plt_entry = NULL;
7065 plt_entry = info->shared ?
7066 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7067
7068 if (!info->shared)
7069 {
7070 bfd_vma got_value =
7071 (htab->hgot->root.u.def.section->output_section->vma
7072 + htab->hgot->root.u.def.section->output_offset
7073 + htab->hgot->root.u.def.value);
7074 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7075
7076 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7077 splt->contents + 0);
7078 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7079 splt->contents + 4);
7080 }
7081 else
7082 {
7083 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7084 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7085 }
7086 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7087 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7088 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7089 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7090 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7091 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7092
7093 if (! info->shared)
7094 {
7095 Elf_Internal_Rela rela;
7096 bfd_byte *loc;
7097
7098 loc = htab->srelplt2->contents;
7099
7100 /* Output the @ha relocation for the first instruction. */
7101 rela.r_offset = (htab->plt->output_section->vma
7102 + htab->plt->output_offset
7103 + 2);
7104 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7105 rela.r_addend = 0;
7106 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7107 loc += sizeof (Elf32_External_Rela);
7108
7109 /* Output the @l relocation for the second instruction. */
7110 rela.r_offset = (htab->plt->output_section->vma
7111 + htab->plt->output_offset
7112 + 6);
7113 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7114 rela.r_addend = 0;
7115 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7116 loc += sizeof (Elf32_External_Rela);
7117
7118 /* Fix up the remaining relocations. They may have the wrong
7119 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7120 in which symbols were output. */
7121 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7122 {
7123 Elf_Internal_Rela rel;
7124
7125 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7126 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7127 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7128 loc += sizeof (Elf32_External_Rela);
7129
7130 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7131 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7132 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7133 loc += sizeof (Elf32_External_Rela);
7134
7135 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7136 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
7137 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7138 loc += sizeof (Elf32_External_Rela);
7139 }
7140 }
7141 }
7142
7143 if (htab->glink != NULL && htab->glink->contents != NULL)
7144 {
7145 unsigned char *p;
7146 unsigned char *endp;
7147 bfd_vma res0;
7148 unsigned int i;
7149
7150 /*
7151 * PIC glink code is the following:
7152 *
7153 * # ith PLT code stub.
7154 * addis 11,30,(plt+(i-1)*4-got)@ha
7155 * lwz 11,(plt+(i-1)*4-got)@l(11)
7156 * mtctr 11
7157 * bctr
7158 *
7159 * # A table of branches, one for each plt entry.
7160 * # The idea is that the plt call stub loads ctr (and r11) with these
7161 * # addresses, so (r11 - res_0) gives the plt index * 4.
7162 * res_0: b PLTresolve
7163 * res_1: b PLTresolve
7164 * .
7165 * # Some number of entries towards the end can be nops
7166 * res_n_m3: nop
7167 * res_n_m2: nop
7168 * res_n_m1:
7169 *
7170 * PLTresolve:
7171 * addis 11,11,(1f-res_0)@ha
7172 * mflr 0
7173 * bcl 20,31,1f
7174 * 1: addi 11,11,(1b-res_0)@l
7175 * mflr 12
7176 * mtlr 0
7177 * sub 11,11,12 # r11 = index * 4
7178 * addis 12,12,(got+4-1b)@ha
7179 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7180 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7181 * mtctr 0
7182 * add 0,11,11
7183 * add 11,0,11 # r11 = index * 12 = reloc offset.
7184 * bctr
7185 */
7186 static const unsigned int pic_plt_resolve[] =
7187 {
7188 ADDIS_11_11,
7189 MFLR_0,
7190 BCL_20_31,
7191 ADDI_11_11,
7192 MFLR_12,
7193 MTLR_0,
7194 SUB_11_11_12,
7195 ADDIS_12_12,
7196 LWZ_0_12,
7197 LWZ_12_12,
7198 MTCTR_0,
7199 ADD_0_11_11,
7200 ADD_11_0_11,
7201 BCTR,
7202 NOP,
7203 NOP
7204 };
7205
7206 static const unsigned int plt_resolve[] =
7207 {
7208 LIS_12,
7209 ADDIS_11_11,
7210 LWZ_0_12,
7211 ADDI_11_11,
7212 MTCTR_0,
7213 ADD_0_11_11,
7214 LWZ_12_12,
7215 ADD_11_0_11,
7216 BCTR,
7217 NOP,
7218 NOP,
7219 NOP,
7220 NOP,
7221 NOP,
7222 NOP,
7223 NOP
7224 };
7225
7226 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7227 abort ();
7228 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7229 abort ();
7230
7231 /* Build the branch table, one for each plt entry (less one),
7232 and perhaps some padding. */
7233 p = htab->glink->contents;
7234 p += htab->glink_pltresolve;
7235 endp = htab->glink->contents;
7236 endp += htab->glink->size - GLINK_PLTRESOLVE;
7237 while (p < endp - 8 * 4)
7238 {
7239 bfd_put_32 (output_bfd, B + endp - p, p);
7240 p += 4;
7241 }
7242 while (p < endp)
7243 {
7244 bfd_put_32 (output_bfd, NOP, p);
7245 p += 4;
7246 }
7247
7248 res0 = (htab->glink_pltresolve
7249 + htab->glink->output_section->vma
7250 + htab->glink->output_offset);
7251
7252 /* Last comes the PLTresolve stub. */
7253 if (info->shared || info->pie)
7254 {
7255 bfd_vma bcl;
7256
7257 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7258 {
7259 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7260 p += 4;
7261 }
7262 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7263
7264 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7265 + htab->glink->output_section->vma
7266 + htab->glink->output_offset);
7267
7268 bfd_put_32 (output_bfd,
7269 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7270 bfd_put_32 (output_bfd,
7271 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7272 bfd_put_32 (output_bfd,
7273 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7274 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7275 {
7276 bfd_put_32 (output_bfd,
7277 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7278 bfd_put_32 (output_bfd,
7279 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7280 }
7281 else
7282 {
7283 bfd_put_32 (output_bfd,
7284 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7285 bfd_put_32 (output_bfd,
7286 LWZ_12_12 + 4, p + 9*4);
7287 }
7288 }
7289 else
7290 {
7291 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7292 {
7293 bfd_put_32 (output_bfd, plt_resolve[i], p);
7294 p += 4;
7295 }
7296 p -= 4 * ARRAY_SIZE (plt_resolve);
7297
7298 bfd_put_32 (output_bfd,
7299 LIS_12 + PPC_HA (got + 4), p + 0*4);
7300 bfd_put_32 (output_bfd,
7301 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7302 bfd_put_32 (output_bfd,
7303 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7304 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7305 {
7306 bfd_put_32 (output_bfd,
7307 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7308 bfd_put_32 (output_bfd,
7309 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7310 }
7311 else
7312 {
7313 bfd_put_32 (output_bfd,
7314 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7315 bfd_put_32 (output_bfd,
7316 LWZ_12_12 + 4, p + 6*4);
7317 }
7318 }
7319 }
7320
7321 return TRUE;
7322 }
7323 \f
7324 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7325 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7326 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7327 #define TARGET_BIG_NAME "elf32-powerpc"
7328 #define ELF_ARCH bfd_arch_powerpc
7329 #define ELF_MACHINE_CODE EM_PPC
7330 #ifdef __QNXTARGET__
7331 #define ELF_MAXPAGESIZE 0x1000
7332 #else
7333 #define ELF_MAXPAGESIZE 0x10000
7334 #endif
7335 #define ELF_MINPAGESIZE 0x1000
7336 #define elf_info_to_howto ppc_elf_info_to_howto
7337
7338 #ifdef EM_CYGNUS_POWERPC
7339 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7340 #endif
7341
7342 #ifdef EM_PPC_OLD
7343 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7344 #endif
7345
7346 #define elf_backend_plt_not_loaded 1
7347 #define elf_backend_can_gc_sections 1
7348 #define elf_backend_can_refcount 1
7349 #define elf_backend_rela_normal 1
7350
7351 #define bfd_elf32_mkobject ppc_elf_mkobject
7352 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7353 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7354 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7355 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7356 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7357
7358 #define elf_backend_object_p ppc_elf_object_p
7359 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7360 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7361 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7362 #define elf_backend_relocate_section ppc_elf_relocate_section
7363 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7364 #define elf_backend_check_relocs ppc_elf_check_relocs
7365 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7366 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7367 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7368 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7369 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7370 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7371 #define elf_backend_fake_sections ppc_elf_fake_sections
7372 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7373 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7374 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7375 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7376 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7377 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7378 #define elf_backend_write_section ppc_elf_write_section
7379 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7380 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7381 #define elf_backend_action_discarded ppc_elf_action_discarded
7382
7383 #include "elf32-target.h"
7384
7385 /* VxWorks Target */
7386
7387 #undef TARGET_LITTLE_SYM
7388 #undef TARGET_LITTLE_NAME
7389
7390 #undef TARGET_BIG_SYM
7391 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7392 #undef TARGET_BIG_NAME
7393 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7394
7395 /* VxWorks uses the elf default section flags for .plt. */
7396 static const struct bfd_elf_special_section *
7397 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7398 {
7399 if (sec->name == NULL)
7400 return NULL;
7401
7402 if (strcmp (sec->name, ".plt") == 0)
7403 return _bfd_elf_get_sec_type_attr (abfd, sec);
7404
7405 return ppc_elf_get_sec_type_attr (abfd, sec);
7406 }
7407
7408 /* Like ppc_elf_link_hash_table_create, but overrides
7409 appropriately for VxWorks. */
7410 static struct bfd_link_hash_table *
7411 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7412 {
7413 struct bfd_link_hash_table *ret;
7414
7415 ret = ppc_elf_link_hash_table_create (abfd);
7416 if (ret)
7417 {
7418 struct ppc_elf_link_hash_table *htab
7419 = (struct ppc_elf_link_hash_table *)ret;
7420 htab->is_vxworks = 1;
7421 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7422 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7423 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7424 }
7425 return ret;
7426 }
7427
7428 /* Tweak magic VxWorks symbols as they are loaded. */
7429 static bfd_boolean
7430 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7431 struct bfd_link_info *info,
7432 Elf_Internal_Sym *sym,
7433 const char **namep ATTRIBUTE_UNUSED,
7434 flagword *flagsp ATTRIBUTE_UNUSED,
7435 asection **secp,
7436 bfd_vma *valp)
7437 {
7438 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7439 valp))
7440 return FALSE;
7441
7442 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7443 }
7444
7445 /* Tweak magic VxWorks symbols as they are written to the output file. */
7446 static bfd_boolean
7447 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7448 ATTRIBUTE_UNUSED,
7449 const char *name,
7450 Elf_Internal_Sym *sym,
7451 asection *input_sec ATTRIBUTE_UNUSED,
7452 struct elf_link_hash_entry *h
7453 ATTRIBUTE_UNUSED)
7454 {
7455 /* Ignore the first dummy symbol. */
7456 if (!name)
7457 return TRUE;
7458
7459 return elf_vxworks_link_output_symbol_hook (name, sym);
7460 }
7461
7462 static void
7463 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7464 {
7465 ppc_elf_final_write_processing(abfd, linker);
7466 elf_vxworks_final_write_processing(abfd, linker);
7467 }
7468
7469 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7470 define it. */
7471 #undef elf_backend_want_plt_sym
7472 #define elf_backend_want_plt_sym 1
7473 #undef elf_backend_want_got_plt
7474 #define elf_backend_want_got_plt 1
7475 #undef elf_backend_got_symbol_offset
7476 #define elf_backend_got_symbol_offset 0
7477 #undef elf_backend_plt_not_loaded
7478 #define elf_backend_plt_not_loaded 0
7479 #undef elf_backend_plt_readonly
7480 #define elf_backend_plt_readonly 1
7481 #undef elf_backend_got_header_size
7482 #define elf_backend_got_header_size 12
7483
7484 #undef bfd_elf32_bfd_link_hash_table_create
7485 #define bfd_elf32_bfd_link_hash_table_create \
7486 ppc_elf_vxworks_link_hash_table_create
7487 #undef elf_backend_add_symbol_hook
7488 #define elf_backend_add_symbol_hook \
7489 ppc_elf_vxworks_add_symbol_hook
7490 #undef elf_backend_link_output_symbol_hook
7491 #define elf_backend_link_output_symbol_hook \
7492 elf_i386_vxworks_link_output_symbol_hook
7493 #undef elf_backend_final_write_processing
7494 #define elf_backend_final_write_processing \
7495 ppc_elf_vxworks_final_write_processing
7496 #undef elf_backend_get_sec_type_attr
7497 #define elf_backend_get_sec_type_attr \
7498 ppc_elf_vxworks_get_sec_type_attr
7499 #undef elf_backend_emit_relocs
7500 #define elf_backend_emit_relocs \
7501 elf_vxworks_emit_relocs
7502
7503 #undef elf32_bed
7504 #define elf32_bed ppc_elf_vxworks_bed
7505
7506 #include "elf32-target.h"
GDB Binutils - Deliverables
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