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[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. */
4680 if (htab->got->size <= 32768)
4681 {
4682 g_o_t = htab->got->size;
4683 htab->got->size += htab->got_header_size;
4684 }
4685 if (htab->old_plt && !htab->is_vxworks)
4686 g_o_t += 4;
4687
4688 htab->elf.hgot->root.u.def.value = g_o_t;
4689 }
4690
4691 if (htab->glink != NULL && htab->glink->size != 0)
4692 {
4693 htab->glink_pltresolve = htab->glink->size;
4694 /* Space for the branch table. */
4695 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4696 /* Pad out to align the start of PLTresolve. */
4697 htab->glink->size += -htab->glink->size & 15;
4698 htab->glink->size += GLINK_PLTRESOLVE;
4699 }
4700
4701 /* We've now determined the sizes of the various dynamic sections.
4702 Allocate memory for them. */
4703 relocs = FALSE;
4704 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4705 {
4706 bfd_boolean strip_section = TRUE;
4707
4708 if ((s->flags & SEC_LINKER_CREATED) == 0)
4709 continue;
4710
4711 if (s == htab->plt
4712 || s == htab->glink
4713 || s == htab->got
4714 || s == htab->sgotplt
4715 || s == htab->sbss
4716 || s == htab->dynbss
4717 || s == htab->dynsbss)
4718 {
4719 /* We'd like to strip these sections if they aren't needed, but if
4720 we've exported dynamic symbols from them we must leave them.
4721 It's too late to tell BFD to get rid of the symbols. */
4722 if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
4723 strip_section = FALSE;
4724 /* Strip this section if we don't need it; see the
4725 comment below. */
4726 }
4727 else if (s == htab->sdata[0].section
4728 || s == htab->sdata[1].section)
4729 {
4730 /* Strip these too. */
4731 }
4732 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4733 {
4734 if (s->size != 0)
4735 {
4736 /* Remember whether there are any relocation sections. */
4737 relocs = TRUE;
4738
4739 /* We use the reloc_count field as a counter if we need
4740 to copy relocs into the output file. */
4741 s->reloc_count = 0;
4742 }
4743 }
4744 else
4745 {
4746 /* It's not one of our sections, so don't allocate space. */
4747 continue;
4748 }
4749
4750 if (s->size == 0 && strip_section)
4751 {
4752 /* If we don't need this section, strip it from the
4753 output file. This is mostly to handle .rela.bss and
4754 .rela.plt. We must create both sections in
4755 create_dynamic_sections, because they must be created
4756 before the linker maps input sections to output
4757 sections. The linker does that before
4758 adjust_dynamic_symbol is called, and it is that
4759 function which decides whether anything needs to go
4760 into these sections. */
4761 s->flags |= SEC_EXCLUDE;
4762 continue;
4763 }
4764
4765 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4766 continue;
4767
4768 /* Allocate memory for the section contents. */
4769 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4770 if (s->contents == NULL)
4771 return FALSE;
4772 }
4773
4774 if (htab->elf.dynamic_sections_created)
4775 {
4776 /* Add some entries to the .dynamic section. We fill in the
4777 values later, in ppc_elf_finish_dynamic_sections, but we
4778 must add the entries now so that we get the correct size for
4779 the .dynamic section. The DT_DEBUG entry is filled in by the
4780 dynamic linker and used by the debugger. */
4781 #define add_dynamic_entry(TAG, VAL) \
4782 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4783
4784 if (info->executable)
4785 {
4786 if (!add_dynamic_entry (DT_DEBUG, 0))
4787 return FALSE;
4788 }
4789
4790 if (htab->plt != NULL && htab->plt->size != 0)
4791 {
4792 if (!add_dynamic_entry (DT_PLTGOT, 0)
4793 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4794 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4795 || !add_dynamic_entry (DT_JMPREL, 0))
4796 return FALSE;
4797 }
4798
4799 if (htab->glink != NULL && htab->glink->size != 0)
4800 {
4801 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4802 return FALSE;
4803 }
4804
4805 if (relocs)
4806 {
4807 if (!add_dynamic_entry (DT_RELA, 0)
4808 || !add_dynamic_entry (DT_RELASZ, 0)
4809 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4810 return FALSE;
4811 }
4812
4813 /* If any dynamic relocs apply to a read-only section, then we
4814 need a DT_TEXTREL entry. */
4815 if ((info->flags & DF_TEXTREL) == 0)
4816 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4817 info);
4818
4819 if ((info->flags & DF_TEXTREL) != 0)
4820 {
4821 if (!add_dynamic_entry (DT_TEXTREL, 0))
4822 return FALSE;
4823 }
4824 }
4825 #undef add_dynamic_entry
4826
4827 return TRUE;
4828 }
4829 \f
4830 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4831
4832 static const int shared_stub_entry[] =
4833 {
4834 0x7c0802a6, /* mflr 0 */
4835 0x429f0005, /* bcl 20, 31, .Lxxx */
4836 0x7d6802a6, /* mflr 11 */
4837 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4838 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4839 0x7c0803a6, /* mtlr 0 */
4840 0x7d6903a6, /* mtctr 11 */
4841 0x4e800420, /* bctr */
4842 };
4843
4844 static const int stub_entry[] =
4845 {
4846 0x3d600000, /* lis 11,xxx@ha */
4847 0x396b0000, /* addi 11,11,xxx@l */
4848 0x7d6903a6, /* mtctr 11 */
4849 0x4e800420, /* bctr */
4850 };
4851
4852 static bfd_boolean
4853 ppc_elf_relax_section (bfd *abfd,
4854 asection *isec,
4855 struct bfd_link_info *link_info,
4856 bfd_boolean *again)
4857 {
4858 struct one_fixup
4859 {
4860 struct one_fixup *next;
4861 asection *tsec;
4862 bfd_vma toff;
4863 bfd_vma trampoff;
4864 };
4865
4866 Elf_Internal_Shdr *symtab_hdr;
4867 bfd_byte *contents = NULL;
4868 Elf_Internal_Sym *isymbuf = NULL;
4869 Elf_Internal_Rela *internal_relocs = NULL;
4870 Elf_Internal_Rela *irel, *irelend;
4871 struct one_fixup *fixups = NULL;
4872 bfd_boolean changed;
4873 struct ppc_elf_link_hash_table *htab;
4874 bfd_size_type trampoff;
4875 asection *got2;
4876
4877 *again = FALSE;
4878
4879 /* Nothing to do if there are no relocations, and no need to do
4880 anything with non-alloc sections. */
4881 if ((isec->flags & SEC_ALLOC) == 0
4882 || (isec->flags & SEC_RELOC) == 0
4883 || isec->reloc_count == 0)
4884 return TRUE;
4885
4886 trampoff = (isec->size + 3) & (bfd_vma) -4;
4887 /* Space for a branch around any trampolines. */
4888 trampoff += 4;
4889
4890 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4891
4892 /* Get a copy of the native relocations. */
4893 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4894 link_info->keep_memory);
4895 if (internal_relocs == NULL)
4896 goto error_return;
4897
4898 htab = ppc_elf_hash_table (link_info);
4899 got2 = bfd_get_section_by_name (abfd, ".got2");
4900
4901 irelend = internal_relocs + isec->reloc_count;
4902 for (irel = internal_relocs; irel < irelend; irel++)
4903 {
4904 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4905 bfd_vma symaddr, reladdr, toff, roff;
4906 asection *tsec;
4907 struct one_fixup *f;
4908 size_t insn_offset = 0;
4909 bfd_vma max_branch_offset, val;
4910 bfd_byte *hit_addr;
4911 unsigned long t0;
4912 unsigned char sym_type;
4913
4914 switch (r_type)
4915 {
4916 case R_PPC_REL24:
4917 case R_PPC_LOCAL24PC:
4918 case R_PPC_PLTREL24:
4919 max_branch_offset = 1 << 25;
4920 break;
4921
4922 case R_PPC_REL14:
4923 case R_PPC_REL14_BRTAKEN:
4924 case R_PPC_REL14_BRNTAKEN:
4925 max_branch_offset = 1 << 15;
4926 break;
4927
4928 default:
4929 continue;
4930 }
4931
4932 /* Get the value of the symbol referred to by the reloc. */
4933 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4934 {
4935 /* A local symbol. */
4936 Elf_Internal_Sym *isym;
4937
4938 /* Read this BFD's local symbols. */
4939 if (isymbuf == NULL)
4940 {
4941 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4942 if (isymbuf == NULL)
4943 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4944 symtab_hdr->sh_info, 0,
4945 NULL, NULL, NULL);
4946 if (isymbuf == 0)
4947 goto error_return;
4948 }
4949 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4950 if (isym->st_shndx == SHN_UNDEF)
4951 continue; /* We can't do anything with undefined symbols. */
4952 else if (isym->st_shndx == SHN_ABS)
4953 tsec = bfd_abs_section_ptr;
4954 else if (isym->st_shndx == SHN_COMMON)
4955 tsec = bfd_com_section_ptr;
4956 else
4957 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4958
4959 toff = isym->st_value;
4960 sym_type = ELF_ST_TYPE (isym->st_info);
4961 }
4962 else
4963 {
4964 /* Global symbol handling. */
4965 unsigned long indx;
4966 struct elf_link_hash_entry *h;
4967
4968 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4969 h = elf_sym_hashes (abfd)[indx];
4970
4971 while (h->root.type == bfd_link_hash_indirect
4972 || h->root.type == bfd_link_hash_warning)
4973 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4974
4975 tsec = NULL;
4976 toff = 0;
4977 if (r_type == R_PPC_PLTREL24
4978 && htab->plt != NULL)
4979 {
4980 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
4981
4982 if (ent != NULL)
4983 {
4984 if (!htab->old_plt)
4985 {
4986 tsec = htab->glink;
4987 toff = ent->glink_offset;
4988 }
4989 else
4990 {
4991 tsec = htab->plt;
4992 toff = ent->plt.offset;
4993 }
4994 }
4995 }
4996 if (tsec != NULL)
4997 ;
4998 else if (h->root.type == bfd_link_hash_defined
4999 || h->root.type == bfd_link_hash_defweak)
5000 {
5001 tsec = h->root.u.def.section;
5002 toff = h->root.u.def.value;
5003 }
5004 else
5005 continue;
5006
5007 sym_type = h->type;
5008 }
5009
5010 /* If the branch and target are in the same section, you have
5011 no hope of adding stubs. We'll error out later should the
5012 branch overflow. */
5013 if (tsec == isec)
5014 continue;
5015
5016 /* There probably isn't any reason to handle symbols in
5017 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5018 attribute for a code section, and we are only looking at
5019 branches. However, implement it correctly here as a
5020 reference for other target relax_section functions. */
5021 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5022 {
5023 /* At this stage in linking, no SEC_MERGE symbol has been
5024 adjusted, so all references to such symbols need to be
5025 passed through _bfd_merged_section_offset. (Later, in
5026 relocate_section, all SEC_MERGE symbols *except* for
5027 section symbols have been adjusted.)
5028
5029 gas may reduce relocations against symbols in SEC_MERGE
5030 sections to a relocation against the section symbol when
5031 the original addend was zero. When the reloc is against
5032 a section symbol we should include the addend in the
5033 offset passed to _bfd_merged_section_offset, since the
5034 location of interest is the original symbol. On the
5035 other hand, an access to "sym+addend" where "sym" is not
5036 a section symbol should not include the addend; Such an
5037 access is presumed to be an offset from "sym"; The
5038 location of interest is just "sym". */
5039 if (sym_type == STT_SECTION)
5040 toff += irel->r_addend;
5041
5042 toff = _bfd_merged_section_offset (abfd, &tsec,
5043 elf_section_data (tsec)->sec_info,
5044 toff);
5045
5046 if (sym_type != STT_SECTION)
5047 toff += irel->r_addend;
5048 }
5049 /* PLTREL24 addends are special. */
5050 else if (r_type != R_PPC_PLTREL24)
5051 toff += irel->r_addend;
5052
5053 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5054
5055 roff = irel->r_offset;
5056 reladdr = isec->output_section->vma + isec->output_offset + roff;
5057
5058 /* If the branch is in range, no need to do anything. */
5059 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5060 continue;
5061
5062 /* Look for an existing fixup to this address. */
5063 for (f = fixups; f ; f = f->next)
5064 if (f->tsec == tsec && f->toff == toff)
5065 break;
5066
5067 if (f == NULL)
5068 {
5069 size_t size;
5070 unsigned long stub_rtype;
5071
5072 val = trampoff - roff;
5073 if (val >= max_branch_offset)
5074 /* Oh dear, we can't reach a trampoline. Don't try to add
5075 one. We'll report an error later. */
5076 continue;
5077
5078 if (link_info->shared)
5079 {
5080 size = 4 * ARRAY_SIZE (shared_stub_entry);
5081 insn_offset = 12;
5082 stub_rtype = R_PPC_RELAX32PC;
5083 }
5084 else
5085 {
5086 size = 4 * ARRAY_SIZE (stub_entry);
5087 insn_offset = 0;
5088 stub_rtype = R_PPC_RELAX32;
5089 }
5090
5091 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5092 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5093 abort ();
5094 if (tsec == htab->plt
5095 || tsec == htab->glink)
5096 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5097
5098 /* Hijack the old relocation. Since we need two
5099 relocations for this use a "composite" reloc. */
5100 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5101 stub_rtype);
5102 irel->r_offset = trampoff + insn_offset;
5103
5104 /* Record the fixup so we don't do it again this section. */
5105 f = bfd_malloc (sizeof (*f));
5106 f->next = fixups;
5107 f->tsec = tsec;
5108 f->toff = toff;
5109 f->trampoff = trampoff;
5110 fixups = f;
5111
5112 trampoff += size;
5113 }
5114 else
5115 {
5116 val = f->trampoff - roff;
5117 if (val >= max_branch_offset)
5118 continue;
5119
5120 /* Nop out the reloc, since we're finalizing things here. */
5121 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5122 }
5123
5124 /* Get the section contents. */
5125 if (contents == NULL)
5126 {
5127 /* Get cached copy if it exists. */
5128 if (elf_section_data (isec)->this_hdr.contents != NULL)
5129 contents = elf_section_data (isec)->this_hdr.contents;
5130 else
5131 {
5132 /* Go get them off disk. */
5133 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5134 goto error_return;
5135 }
5136 }
5137
5138 /* Fix up the existing branch to hit the trampoline. */
5139 hit_addr = contents + roff;
5140 switch (r_type)
5141 {
5142 case R_PPC_REL24:
5143 case R_PPC_LOCAL24PC:
5144 case R_PPC_PLTREL24:
5145 t0 = bfd_get_32 (abfd, hit_addr);
5146 t0 &= ~0x3fffffc;
5147 t0 |= val & 0x3fffffc;
5148 bfd_put_32 (abfd, t0, hit_addr);
5149 break;
5150
5151 case R_PPC_REL14:
5152 case R_PPC_REL14_BRTAKEN:
5153 case R_PPC_REL14_BRNTAKEN:
5154 t0 = bfd_get_32 (abfd, hit_addr);
5155 t0 &= ~0xfffc;
5156 t0 |= val & 0xfffc;
5157 bfd_put_32 (abfd, t0, hit_addr);
5158 break;
5159 }
5160 }
5161
5162 /* Write out the trampolines. */
5163 changed = fixups != NULL;
5164 if (fixups != NULL)
5165 {
5166 const int *stub;
5167 bfd_byte *dest;
5168 bfd_vma val;
5169 int i, size;
5170
5171 do
5172 {
5173 struct one_fixup *f = fixups;
5174 fixups = fixups->next;
5175 free (f);
5176 }
5177 while (fixups);
5178
5179 contents = bfd_realloc (contents, trampoff);
5180 if (contents == NULL)
5181 goto error_return;
5182
5183 isec->size = (isec->size + 3) & (bfd_vma) -4;
5184 /* Branch around the trampolines. */
5185 val = trampoff - isec->size + 0x48000000;
5186 dest = contents + isec->size;
5187 isec->size = trampoff;
5188 bfd_put_32 (abfd, val, dest);
5189 dest += 4;
5190
5191 if (link_info->shared)
5192 {
5193 stub = shared_stub_entry;
5194 size = ARRAY_SIZE (shared_stub_entry);
5195 }
5196 else
5197 {
5198 stub = stub_entry;
5199 size = ARRAY_SIZE (stub_entry);
5200 }
5201
5202 i = 0;
5203 while (dest < contents + trampoff)
5204 {
5205 bfd_put_32 (abfd, stub[i], dest);
5206 i++;
5207 if (i == size)
5208 i = 0;
5209 dest += 4;
5210 }
5211 BFD_ASSERT (i == 0);
5212 }
5213
5214 if (isymbuf != NULL
5215 && symtab_hdr->contents != (unsigned char *) isymbuf)
5216 {
5217 if (! link_info->keep_memory)
5218 free (isymbuf);
5219 else
5220 {
5221 /* Cache the symbols for elf_link_input_bfd. */
5222 symtab_hdr->contents = (unsigned char *) isymbuf;
5223 }
5224 }
5225
5226 if (contents != NULL
5227 && elf_section_data (isec)->this_hdr.contents != contents)
5228 {
5229 if (!changed && !link_info->keep_memory)
5230 free (contents);
5231 else
5232 {
5233 /* Cache the section contents for elf_link_input_bfd. */
5234 elf_section_data (isec)->this_hdr.contents = contents;
5235 }
5236 }
5237
5238 if (elf_section_data (isec)->relocs != internal_relocs)
5239 {
5240 if (!changed)
5241 free (internal_relocs);
5242 else
5243 elf_section_data (isec)->relocs = internal_relocs;
5244 }
5245
5246 *again = changed;
5247 return TRUE;
5248
5249 error_return:
5250 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5251 free (isymbuf);
5252 if (contents != NULL
5253 && elf_section_data (isec)->this_hdr.contents != contents)
5254 free (contents);
5255 if (internal_relocs != NULL
5256 && elf_section_data (isec)->relocs != internal_relocs)
5257 free (internal_relocs);
5258 return FALSE;
5259 }
5260 \f
5261 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
5262 set here rather than via PROVIDE in the default linker script,
5263 because using PROVIDE inside an output section statement results in
5264 unnecessary output sections. Using PROVIDE outside an output section
5265 statement runs the risk of section alignment affecting where the
5266 section starts. */
5267
5268 void
5269 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
5270 {
5271 struct ppc_elf_link_hash_table *htab;
5272 unsigned i;
5273 asection *s;
5274 bfd_vma val;
5275
5276 htab = ppc_elf_hash_table (info);
5277
5278 for (i = 0; i < 2; i++)
5279 {
5280 elf_linker_section_t *lsect = &htab->sdata[i];
5281
5282 s = lsect->section;
5283 if (s != NULL)
5284 s = s->output_section;
5285 if (s == NULL)
5286 s = bfd_get_section_by_name (obfd, lsect->name);
5287 if (s == NULL)
5288 s = bfd_get_section_by_name (obfd, lsect->bss_name);
5289
5290 if (s)
5291 {
5292 /* VxWorks executables are relocatable, so the sdata base symbols
5293 must be section-relative. */
5294 val = 32768;
5295 lsect->sym_val = val + s->vma;
5296 }
5297 else
5298 {
5299 val = 0;
5300 lsect->sym_val = 0;
5301 }
5302
5303 _bfd_elf_provide_symbol (info, lsect->sym_name, val, s);
5304 }
5305 }
5306 \f
5307 /* Fill in the address for a pointer generated in a linker section. */
5308
5309 static bfd_vma
5310 elf_finish_pointer_linker_section (bfd *input_bfd,
5311 elf_linker_section_t *lsect,
5312 struct elf_link_hash_entry *h,
5313 bfd_vma relocation,
5314 const Elf_Internal_Rela *rel)
5315 {
5316 elf_linker_section_pointers_t *linker_section_ptr;
5317
5318 BFD_ASSERT (lsect != NULL);
5319
5320 if (h != NULL)
5321 {
5322 /* Handle global symbol. */
5323 struct ppc_elf_link_hash_entry *eh;
5324
5325 eh = (struct ppc_elf_link_hash_entry *) h;
5326 BFD_ASSERT (eh->elf.def_regular);
5327 linker_section_ptr = eh->linker_section_pointer;
5328 }
5329 else
5330 {
5331 /* Handle local symbol. */
5332 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5333
5334 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5335 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5336 }
5337
5338 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5339 rel->r_addend,
5340 lsect);
5341 BFD_ASSERT (linker_section_ptr != NULL);
5342
5343 /* Offset will always be a multiple of four, so use the bottom bit
5344 as a "written" flag. */
5345 if ((linker_section_ptr->offset & 1) == 0)
5346 {
5347 bfd_put_32 (lsect->section->owner,
5348 relocation + linker_section_ptr->addend,
5349 lsect->section->contents + linker_section_ptr->offset);
5350 linker_section_ptr->offset += 1;
5351 }
5352
5353 relocation = (lsect->section->output_offset
5354 + linker_section_ptr->offset - 1
5355 - 0x8000);
5356
5357 #ifdef DEBUG
5358 fprintf (stderr,
5359 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5360 lsect->name, (long) relocation, (long) relocation);
5361 #endif
5362
5363 /* Subtract out the addend, because it will get added back in by the normal
5364 processing. */
5365 return relocation - linker_section_ptr->addend;
5366 }
5367
5368 /* The RELOCATE_SECTION function is called by the ELF backend linker
5369 to handle the relocations for a section.
5370
5371 The relocs are always passed as Rela structures; if the section
5372 actually uses Rel structures, the r_addend field will always be
5373 zero.
5374
5375 This function is responsible for adjust the section contents as
5376 necessary, and (if using Rela relocs and generating a
5377 relocatable output file) adjusting the reloc addend as
5378 necessary.
5379
5380 This function does not have to worry about setting the reloc
5381 address or the reloc symbol index.
5382
5383 LOCAL_SYMS is a pointer to the swapped in local symbols.
5384
5385 LOCAL_SECTIONS is an array giving the section in the input file
5386 corresponding to the st_shndx field of each local symbol.
5387
5388 The global hash table entry for the global symbols can be found
5389 via elf_sym_hashes (input_bfd).
5390
5391 When generating relocatable output, this function must handle
5392 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5393 going to be the section symbol corresponding to the output
5394 section, which means that the addend must be adjusted
5395 accordingly. */
5396
5397 static bfd_boolean
5398 ppc_elf_relocate_section (bfd *output_bfd,
5399 struct bfd_link_info *info,
5400 bfd *input_bfd,
5401 asection *input_section,
5402 bfd_byte *contents,
5403 Elf_Internal_Rela *relocs,
5404 Elf_Internal_Sym *local_syms,
5405 asection **local_sections)
5406 {
5407 Elf_Internal_Shdr *symtab_hdr;
5408 struct elf_link_hash_entry **sym_hashes;
5409 struct ppc_elf_link_hash_table *htab;
5410 Elf_Internal_Rela *rel;
5411 Elf_Internal_Rela *relend;
5412 Elf_Internal_Rela outrel;
5413 bfd_byte *loc;
5414 asection *got2, *sreloc = NULL;
5415 bfd_vma *local_got_offsets;
5416 bfd_boolean ret = TRUE;
5417
5418 #ifdef DEBUG
5419 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5420 "%ld relocations%s",
5421 input_bfd, input_section,
5422 (long) input_section->reloc_count,
5423 (info->relocatable) ? " (relocatable)" : "");
5424 #endif
5425
5426 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5427
5428 if (info->relocatable)
5429 {
5430 if (got2 == NULL)
5431 return TRUE;
5432
5433 rel = relocs;
5434 relend = relocs + input_section->reloc_count;
5435 for (; rel < relend; rel++)
5436 {
5437 enum elf_ppc_reloc_type r_type;
5438
5439 r_type = ELF32_R_TYPE (rel->r_info);
5440 if (r_type == R_PPC_PLTREL24
5441 && rel->r_addend >= 32768)
5442 {
5443 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5444 addend specifies the GOT pointer offset within .got2. */
5445 rel->r_addend += got2->output_offset;
5446 }
5447 }
5448 return TRUE;
5449 }
5450
5451 /* Initialize howto table if not already done. */
5452 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5453 ppc_elf_howto_init ();
5454
5455 htab = ppc_elf_hash_table (info);
5456 local_got_offsets = elf_local_got_offsets (input_bfd);
5457 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5458 sym_hashes = elf_sym_hashes (input_bfd);
5459 rel = relocs;
5460 relend = relocs + input_section->reloc_count;
5461 for (; rel < relend; rel++)
5462 {
5463 enum elf_ppc_reloc_type r_type;
5464 bfd_vma addend;
5465 bfd_reloc_status_type r;
5466 Elf_Internal_Sym *sym;
5467 asection *sec;
5468 struct elf_link_hash_entry *h;
5469 const char *sym_name;
5470 reloc_howto_type *howto;
5471 unsigned long r_symndx;
5472 bfd_vma relocation;
5473 bfd_vma branch_bit, insn, from;
5474 bfd_boolean unresolved_reloc;
5475 bfd_boolean warned;
5476 unsigned int tls_type, tls_mask, tls_gd;
5477
5478 r_type = ELF32_R_TYPE (rel->r_info);
5479 sym = NULL;
5480 sec = NULL;
5481 h = NULL;
5482 unresolved_reloc = FALSE;
5483 warned = FALSE;
5484 r_symndx = ELF32_R_SYM (rel->r_info);
5485
5486 if (r_symndx < symtab_hdr->sh_info)
5487 {
5488 sym = local_syms + r_symndx;
5489 sec = local_sections[r_symndx];
5490 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5491
5492 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5493 }
5494 else
5495 {
5496 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5497 r_symndx, symtab_hdr, sym_hashes,
5498 h, sec, relocation,
5499 unresolved_reloc, warned);
5500
5501 sym_name = h->root.root.string;
5502 }
5503
5504 /* TLS optimizations. Replace instruction sequences and relocs
5505 based on information we collected in tls_optimize. We edit
5506 RELOCS so that --emit-relocs will output something sensible
5507 for the final instruction stream. */
5508 tls_mask = 0;
5509 tls_gd = 0;
5510 if (IS_PPC_TLS_RELOC (r_type))
5511 {
5512 if (h != NULL)
5513 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5514 else if (local_got_offsets != NULL)
5515 {
5516 char *lgot_masks;
5517 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5518 tls_mask = lgot_masks[r_symndx];
5519 }
5520 }
5521
5522 /* Ensure reloc mapping code below stays sane. */
5523 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5524 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5525 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5526 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5527 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5528 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5529 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5530 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5531 abort ();
5532 switch (r_type)
5533 {
5534 default:
5535 break;
5536
5537 case R_PPC_GOT_TPREL16:
5538 case R_PPC_GOT_TPREL16_LO:
5539 if (tls_mask != 0
5540 && (tls_mask & TLS_TPREL) == 0)
5541 {
5542 bfd_vma insn;
5543 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5544 insn &= 31 << 21;
5545 insn |= 0x3c020000; /* addis 0,2,0 */
5546 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5547 r_type = R_PPC_TPREL16_HA;
5548 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5549 }
5550 break;
5551
5552 case R_PPC_TLS:
5553 if (tls_mask != 0
5554 && (tls_mask & TLS_TPREL) == 0)
5555 {
5556 bfd_vma insn, rtra;
5557 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5558 if ((insn & ((31 << 26) | (31 << 11)))
5559 == ((31 << 26) | (2 << 11)))
5560 rtra = insn & ((1 << 26) - (1 << 16));
5561 else if ((insn & ((31 << 26) | (31 << 16)))
5562 == ((31 << 26) | (2 << 16)))
5563 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5564 else
5565 abort ();
5566 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5567 /* add -> addi. */
5568 insn = 14 << 26;
5569 else if ((insn & (31 << 1)) == 23 << 1
5570 && ((insn & (31 << 6)) < 14 << 6
5571 || ((insn & (31 << 6)) >= 16 << 6
5572 && (insn & (31 << 6)) < 24 << 6)))
5573 /* load and store indexed -> dform. */
5574 insn = (32 | ((insn >> 6) & 31)) << 26;
5575 else if ((insn & (31 << 1)) == 21 << 1
5576 && (insn & (0x1a << 6)) == 0)
5577 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5578 insn = (((58 | ((insn >> 6) & 4)) << 26)
5579 | ((insn >> 6) & 1));
5580 else if ((insn & (31 << 1)) == 21 << 1
5581 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5582 /* lwax -> lwa. */
5583 insn = (58 << 26) | 2;
5584 else
5585 abort ();
5586 insn |= rtra;
5587 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5588 r_type = R_PPC_TPREL16_LO;
5589 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5590 /* Was PPC_TLS which sits on insn boundary, now
5591 PPC_TPREL16_LO which is at insn+2. */
5592 rel->r_offset += 2;
5593 }
5594 break;
5595
5596 case R_PPC_GOT_TLSGD16_HI:
5597 case R_PPC_GOT_TLSGD16_HA:
5598 tls_gd = TLS_TPRELGD;
5599 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5600 goto tls_gdld_hi;
5601 break;
5602
5603 case R_PPC_GOT_TLSLD16_HI:
5604 case R_PPC_GOT_TLSLD16_HA:
5605 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5606 {
5607 tls_gdld_hi:
5608 if ((tls_mask & tls_gd) != 0)
5609 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5610 + R_PPC_GOT_TPREL16);
5611 else
5612 {
5613 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5614 rel->r_offset -= 2;
5615 r_type = R_PPC_NONE;
5616 }
5617 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5618 }
5619 break;
5620
5621 case R_PPC_GOT_TLSGD16:
5622 case R_PPC_GOT_TLSGD16_LO:
5623 tls_gd = TLS_TPRELGD;
5624 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5625 goto tls_get_addr_check;
5626 break;
5627
5628 case R_PPC_GOT_TLSLD16:
5629 case R_PPC_GOT_TLSLD16_LO:
5630 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5631 {
5632 tls_get_addr_check:
5633 if (rel + 1 < relend)
5634 {
5635 enum elf_ppc_reloc_type r_type2;
5636 unsigned long r_symndx2;
5637 struct elf_link_hash_entry *h2;
5638 bfd_vma insn1, insn2;
5639 bfd_vma offset;
5640
5641 /* The next instruction should be a call to
5642 __tls_get_addr. Peek at the reloc to be sure. */
5643 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5644 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5645 if (r_symndx2 < symtab_hdr->sh_info
5646 || (r_type2 != R_PPC_REL14
5647 && r_type2 != R_PPC_REL14_BRTAKEN
5648 && r_type2 != R_PPC_REL14_BRNTAKEN
5649 && r_type2 != R_PPC_REL24
5650 && r_type2 != R_PPC_PLTREL24))
5651 break;
5652
5653 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5654 while (h2->root.type == bfd_link_hash_indirect
5655 || h2->root.type == bfd_link_hash_warning)
5656 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5657 if (h2 == NULL || h2 != htab->tls_get_addr)
5658 break;
5659
5660 /* OK, it checks out. Replace the call. */
5661 offset = rel[1].r_offset;
5662 insn1 = bfd_get_32 (output_bfd,
5663 contents + rel->r_offset - 2);
5664 if ((tls_mask & tls_gd) != 0)
5665 {
5666 /* IE */
5667 insn1 &= (1 << 26) - 1;
5668 insn1 |= 32 << 26; /* lwz */
5669 insn2 = 0x7c631214; /* add 3,3,2 */
5670 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5671 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5672 + R_PPC_GOT_TPREL16);
5673 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5674 }
5675 else
5676 {
5677 /* LE */
5678 insn1 = 0x3c620000; /* addis 3,2,0 */
5679 insn2 = 0x38630000; /* addi 3,3,0 */
5680 if (tls_gd == 0)
5681 {
5682 /* Was an LD reloc. */
5683 r_symndx = 0;
5684 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5685 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5686 }
5687 r_type = R_PPC_TPREL16_HA;
5688 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5689 rel[1].r_info = ELF32_R_INFO (r_symndx,
5690 R_PPC_TPREL16_LO);
5691 rel[1].r_offset += 2;
5692 }
5693 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5694 bfd_put_32 (output_bfd, insn2, contents + offset);
5695 if (tls_gd == 0)
5696 {
5697 /* We changed the symbol on an LD reloc. Start over
5698 in order to get h, sym, sec etc. right. */
5699 rel--;
5700 continue;
5701 }
5702 }
5703 }
5704 break;
5705 }
5706
5707 /* Handle other relocations that tweak non-addend part of insn. */
5708 branch_bit = 0;
5709 switch (r_type)
5710 {
5711 default:
5712 break;
5713
5714 /* Branch taken prediction relocations. */
5715 case R_PPC_ADDR14_BRTAKEN:
5716 case R_PPC_REL14_BRTAKEN:
5717 branch_bit = BRANCH_PREDICT_BIT;
5718 /* Fall thru */
5719
5720 /* Branch not taken prediction relocations. */
5721 case R_PPC_ADDR14_BRNTAKEN:
5722 case R_PPC_REL14_BRNTAKEN:
5723 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5724 insn &= ~BRANCH_PREDICT_BIT;
5725 insn |= branch_bit;
5726
5727 from = (rel->r_offset
5728 + input_section->output_offset
5729 + input_section->output_section->vma);
5730
5731 /* Invert 'y' bit if not the default. */
5732 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5733 insn ^= BRANCH_PREDICT_BIT;
5734
5735 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5736 break;
5737 }
5738
5739 addend = rel->r_addend;
5740 tls_type = 0;
5741 howto = NULL;
5742 if (r_type < R_PPC_max)
5743 howto = ppc_elf_howto_table[r_type];
5744 switch (r_type)
5745 {
5746 default:
5747 (*_bfd_error_handler)
5748 (_("%B: unknown relocation type %d for symbol %s"),
5749 input_bfd, (int) r_type, sym_name);
5750
5751 bfd_set_error (bfd_error_bad_value);
5752 ret = FALSE;
5753 continue;
5754
5755 case R_PPC_NONE:
5756 case R_PPC_TLS:
5757 case R_PPC_EMB_MRKREF:
5758 case R_PPC_GNU_VTINHERIT:
5759 case R_PPC_GNU_VTENTRY:
5760 continue;
5761
5762 /* GOT16 relocations. Like an ADDR16 using the symbol's
5763 address in the GOT as relocation value instead of the
5764 symbol's value itself. Also, create a GOT entry for the
5765 symbol and put the symbol value there. */
5766 case R_PPC_GOT_TLSGD16:
5767 case R_PPC_GOT_TLSGD16_LO:
5768 case R_PPC_GOT_TLSGD16_HI:
5769 case R_PPC_GOT_TLSGD16_HA:
5770 tls_type = TLS_TLS | TLS_GD;
5771 goto dogot;
5772
5773 case R_PPC_GOT_TLSLD16:
5774 case R_PPC_GOT_TLSLD16_LO:
5775 case R_PPC_GOT_TLSLD16_HI:
5776 case R_PPC_GOT_TLSLD16_HA:
5777 tls_type = TLS_TLS | TLS_LD;
5778 goto dogot;
5779
5780 case R_PPC_GOT_TPREL16:
5781 case R_PPC_GOT_TPREL16_LO:
5782 case R_PPC_GOT_TPREL16_HI:
5783 case R_PPC_GOT_TPREL16_HA:
5784 tls_type = TLS_TLS | TLS_TPREL;
5785 goto dogot;
5786
5787 case R_PPC_GOT_DTPREL16:
5788 case R_PPC_GOT_DTPREL16_LO:
5789 case R_PPC_GOT_DTPREL16_HI:
5790 case R_PPC_GOT_DTPREL16_HA:
5791 tls_type = TLS_TLS | TLS_DTPREL;
5792 goto dogot;
5793
5794 case R_PPC_GOT16:
5795 case R_PPC_GOT16_LO:
5796 case R_PPC_GOT16_HI:
5797 case R_PPC_GOT16_HA:
5798 dogot:
5799 {
5800 /* Relocation is to the entry for this symbol in the global
5801 offset table. */
5802 bfd_vma off;
5803 bfd_vma *offp;
5804 unsigned long indx;
5805
5806 if (htab->got == NULL)
5807 abort ();
5808
5809 indx = 0;
5810 if (tls_type == (TLS_TLS | TLS_LD)
5811 && (h == NULL
5812 || !h->def_dynamic))
5813 offp = &htab->tlsld_got.offset;
5814 else if (h != NULL)
5815 {
5816 bfd_boolean dyn;
5817 dyn = htab->elf.dynamic_sections_created;
5818 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5819 || (info->shared
5820 && SYMBOL_REFERENCES_LOCAL (info, h)))
5821 /* This is actually a static link, or it is a
5822 -Bsymbolic link and the symbol is defined
5823 locally, or the symbol was forced to be local
5824 because of a version file. */
5825 ;
5826 else
5827 {
5828 indx = h->dynindx;
5829 unresolved_reloc = FALSE;
5830 }
5831 offp = &h->got.offset;
5832 }
5833 else
5834 {
5835 if (local_got_offsets == NULL)
5836 abort ();
5837 offp = &local_got_offsets[r_symndx];
5838 }
5839
5840 /* The offset must always be a multiple of 4. We use the
5841 least significant bit to record whether we have already
5842 processed this entry. */
5843 off = *offp;
5844 if ((off & 1) != 0)
5845 off &= ~1;
5846 else
5847 {
5848 unsigned int tls_m = (tls_mask
5849 & (TLS_LD | TLS_GD | TLS_DTPREL
5850 | TLS_TPREL | TLS_TPRELGD));
5851
5852 if (offp == &htab->tlsld_got.offset)
5853 tls_m = TLS_LD;
5854 else if (h == NULL
5855 || !h->def_dynamic)
5856 tls_m &= ~TLS_LD;
5857
5858 /* We might have multiple got entries for this sym.
5859 Initialize them all. */
5860 do
5861 {
5862 int tls_ty = 0;
5863
5864 if ((tls_m & TLS_LD) != 0)
5865 {
5866 tls_ty = TLS_TLS | TLS_LD;
5867 tls_m &= ~TLS_LD;
5868 }
5869 else if ((tls_m & TLS_GD) != 0)
5870 {
5871 tls_ty = TLS_TLS | TLS_GD;
5872 tls_m &= ~TLS_GD;
5873 }
5874 else if ((tls_m & TLS_DTPREL) != 0)
5875 {
5876 tls_ty = TLS_TLS | TLS_DTPREL;
5877 tls_m &= ~TLS_DTPREL;
5878 }
5879 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5880 {
5881 tls_ty = TLS_TLS | TLS_TPREL;
5882 tls_m = 0;
5883 }
5884
5885 /* Generate relocs for the dynamic linker. */
5886 if ((info->shared || indx != 0)
5887 && (h == NULL
5888 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5889 || h->root.type != bfd_link_hash_undefweak))
5890 {
5891 outrel.r_offset = (htab->got->output_section->vma
5892 + htab->got->output_offset
5893 + off);
5894 outrel.r_addend = 0;
5895 if (tls_ty & (TLS_LD | TLS_GD))
5896 {
5897 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5898 if (tls_ty == (TLS_TLS | TLS_GD))
5899 {
5900 loc = htab->relgot->contents;
5901 loc += (htab->relgot->reloc_count++
5902 * sizeof (Elf32_External_Rela));
5903 bfd_elf32_swap_reloca_out (output_bfd,
5904 &outrel, loc);
5905 outrel.r_offset += 4;
5906 outrel.r_info
5907 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5908 }
5909 }
5910 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5911 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5912 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5913 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5914 else if (indx == 0)
5915 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5916 else
5917 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5918 if (indx == 0)
5919 {
5920 outrel.r_addend += relocation;
5921 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5922 outrel.r_addend -= htab->elf.tls_sec->vma;
5923 }
5924 loc = htab->relgot->contents;
5925 loc += (htab->relgot->reloc_count++
5926 * sizeof (Elf32_External_Rela));
5927 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5928 }
5929
5930 /* Init the .got section contents if we're not
5931 emitting a reloc. */
5932 else
5933 {
5934 bfd_vma value = relocation;
5935
5936 if (tls_ty == (TLS_TLS | TLS_LD))
5937 value = 1;
5938 else if (tls_ty != 0)
5939 {
5940 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5941 if (tls_ty == (TLS_TLS | TLS_TPREL))
5942 value += DTP_OFFSET - TP_OFFSET;
5943
5944 if (tls_ty == (TLS_TLS | TLS_GD))
5945 {
5946 bfd_put_32 (output_bfd, value,
5947 htab->got->contents + off + 4);
5948 value = 1;
5949 }
5950 }
5951 bfd_put_32 (output_bfd, value,
5952 htab->got->contents + off);
5953 }
5954
5955 off += 4;
5956 if (tls_ty & (TLS_LD | TLS_GD))
5957 off += 4;
5958 }
5959 while (tls_m != 0);
5960
5961 off = *offp;
5962 *offp = off | 1;
5963 }
5964
5965 if (off >= (bfd_vma) -2)
5966 abort ();
5967
5968 if ((tls_type & TLS_TLS) != 0)
5969 {
5970 if (tls_type != (TLS_TLS | TLS_LD))
5971 {
5972 if ((tls_mask & TLS_LD) != 0
5973 && !(h == NULL
5974 || !h->def_dynamic))
5975 off += 8;
5976 if (tls_type != (TLS_TLS | TLS_GD))
5977 {
5978 if ((tls_mask & TLS_GD) != 0)
5979 off += 8;
5980 if (tls_type != (TLS_TLS | TLS_DTPREL))
5981 {
5982 if ((tls_mask & TLS_DTPREL) != 0)
5983 off += 4;
5984 }
5985 }
5986 }
5987 }
5988
5989 relocation = htab->got->output_offset + off;
5990 relocation -= htab->elf.hgot->root.u.def.value;
5991
5992 /* Addends on got relocations don't make much sense.
5993 x+off@got is actually x@got+off, and since the got is
5994 generated by a hash table traversal, the value in the
5995 got at entry m+n bears little relation to the entry m. */
5996 if (addend != 0)
5997 (*_bfd_error_handler)
5998 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
5999 input_bfd,
6000 input_section,
6001 (long) rel->r_offset,
6002 howto->name,
6003 sym_name);
6004 }
6005 break;
6006
6007 /* Relocations that need no special processing. */
6008 case R_PPC_LOCAL24PC:
6009 /* It makes no sense to point a local relocation
6010 at a symbol not in this object. */
6011 if (unresolved_reloc)
6012 {
6013 if (! (*info->callbacks->undefined_symbol) (info,
6014 h->root.root.string,
6015 input_bfd,
6016 input_section,
6017 rel->r_offset,
6018 TRUE))
6019 return FALSE;
6020 continue;
6021 }
6022 break;
6023
6024 case R_PPC_DTPREL16:
6025 case R_PPC_DTPREL16_LO:
6026 case R_PPC_DTPREL16_HI:
6027 case R_PPC_DTPREL16_HA:
6028 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6029 break;
6030
6031 /* Relocations that may need to be propagated if this is a shared
6032 object. */
6033 case R_PPC_TPREL16:
6034 case R_PPC_TPREL16_LO:
6035 case R_PPC_TPREL16_HI:
6036 case R_PPC_TPREL16_HA:
6037 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6038 /* The TPREL16 relocs shouldn't really be used in shared
6039 libs as they will result in DT_TEXTREL being set, but
6040 support them anyway. */
6041 goto dodyn;
6042
6043 case R_PPC_TPREL32:
6044 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6045 goto dodyn;
6046
6047 case R_PPC_DTPREL32:
6048 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6049 goto dodyn;
6050
6051 case R_PPC_DTPMOD32:
6052 relocation = 1;
6053 addend = 0;
6054 goto dodyn;
6055
6056 case R_PPC_REL16:
6057 case R_PPC_REL16_LO:
6058 case R_PPC_REL16_HI:
6059 case R_PPC_REL16_HA:
6060 break;
6061
6062 case R_PPC_REL24:
6063 case R_PPC_REL32:
6064 case R_PPC_REL14:
6065 case R_PPC_REL14_BRTAKEN:
6066 case R_PPC_REL14_BRNTAKEN:
6067 /* If these relocations are not to a named symbol, they can be
6068 handled right here, no need to bother the dynamic linker. */
6069 if (SYMBOL_REFERENCES_LOCAL (info, h)
6070 || h == htab->elf.hgot)
6071 break;
6072 /* fall through */
6073
6074 /* Relocations that always need to be propagated if this is a shared
6075 object. */
6076 case R_PPC_ADDR32:
6077 case R_PPC_ADDR24:
6078 case R_PPC_ADDR16:
6079 case R_PPC_ADDR16_LO:
6080 case R_PPC_ADDR16_HI:
6081 case R_PPC_ADDR16_HA:
6082 case R_PPC_ADDR14:
6083 case R_PPC_ADDR14_BRTAKEN:
6084 case R_PPC_ADDR14_BRNTAKEN:
6085 case R_PPC_UADDR32:
6086 case R_PPC_UADDR16:
6087 /* r_symndx will be zero only for relocs against symbols
6088 from removed linkonce sections, or sections discarded by
6089 a linker script. */
6090 dodyn:
6091 if (r_symndx == 0)
6092 break;
6093 /* Fall thru. */
6094
6095 if ((input_section->flags & SEC_ALLOC) == 0)
6096 break;
6097 /* Fall thru. */
6098
6099 if ((info->shared
6100 && (h == NULL
6101 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6102 || h->root.type != bfd_link_hash_undefweak)
6103 && (MUST_BE_DYN_RELOC (r_type)
6104 || !SYMBOL_CALLS_LOCAL (info, h)))
6105 || (ELIMINATE_COPY_RELOCS
6106 && !info->shared
6107 && h != NULL
6108 && h->dynindx != -1
6109 && !h->non_got_ref
6110 && h->def_dynamic
6111 && !h->def_regular))
6112 {
6113 int skip;
6114
6115 #ifdef DEBUG
6116 fprintf (stderr, "ppc_elf_relocate_section needs to "
6117 "create relocation for %s\n",
6118 (h && h->root.root.string
6119 ? h->root.root.string : "<unknown>"));
6120 #endif
6121
6122 /* When generating a shared object, these relocations
6123 are copied into the output file to be resolved at run
6124 time. */
6125 if (sreloc == NULL)
6126 {
6127 const char *name;
6128
6129 name = (bfd_elf_string_from_elf_section
6130 (input_bfd,
6131 elf_elfheader (input_bfd)->e_shstrndx,
6132 elf_section_data (input_section)->rel_hdr.sh_name));
6133 if (name == NULL)
6134 return FALSE;
6135
6136 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6137 && strcmp (bfd_get_section_name (input_bfd,
6138 input_section),
6139 name + 5) == 0);
6140
6141 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6142 BFD_ASSERT (sreloc != NULL);
6143 }
6144
6145 skip = 0;
6146
6147 outrel.r_offset =
6148 _bfd_elf_section_offset (output_bfd, info, input_section,
6149 rel->r_offset);
6150 if (outrel.r_offset == (bfd_vma) -1
6151 || outrel.r_offset == (bfd_vma) -2)
6152 skip = (int) outrel.r_offset;
6153 outrel.r_offset += (input_section->output_section->vma
6154 + input_section->output_offset);
6155
6156 if (skip)
6157 memset (&outrel, 0, sizeof outrel);
6158 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6159 {
6160 unresolved_reloc = FALSE;
6161 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6162 outrel.r_addend = rel->r_addend;
6163 }
6164 else
6165 {
6166 outrel.r_addend = relocation + rel->r_addend;
6167
6168 if (r_type == R_PPC_ADDR32)
6169 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6170 else
6171 {
6172 long indx;
6173
6174 if (bfd_is_abs_section (sec))
6175 indx = 0;
6176 else if (sec == NULL || sec->owner == NULL)
6177 {
6178 bfd_set_error (bfd_error_bad_value);
6179 return FALSE;
6180 }
6181 else
6182 {
6183 asection *osec;
6184
6185 /* We are turning this relocation into one
6186 against a section symbol. It would be
6187 proper to subtract the symbol's value,
6188 osec->vma, from the emitted reloc addend,
6189 but ld.so expects buggy relocs. */
6190 osec = sec->output_section;
6191 indx = elf_section_data (osec)->dynindx;
6192 BFD_ASSERT (indx > 0);
6193 #ifdef DEBUG
6194 if (indx <= 0)
6195 printf ("indx=%d section=%s flags=%08x name=%s\n",
6196 indx, osec->name, osec->flags,
6197 h->root.root.string);
6198 #endif
6199 }
6200
6201 outrel.r_info = ELF32_R_INFO (indx, r_type);
6202 }
6203 }
6204
6205 loc = sreloc->contents;
6206 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6207 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6208
6209 if (skip == -1)
6210 continue;
6211
6212 /* This reloc will be computed at runtime. We clear the memory
6213 so that it contains predictable value. */
6214 if (! skip
6215 && ((input_section->flags & SEC_ALLOC) != 0
6216 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6217 {
6218 relocation = howto->pc_relative ? outrel.r_offset : 0;
6219 addend = 0;
6220 break;
6221 }
6222 }
6223 break;
6224
6225 case R_PPC_RELAX32PC_PLT:
6226 case R_PPC_RELAX32_PLT:
6227 {
6228 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6229
6230 if (!htab->old_plt)
6231 relocation = (htab->glink->output_section->vma
6232 + htab->glink->output_offset
6233 + ent->glink_offset);
6234 else
6235 relocation = (htab->plt->output_section->vma
6236 + htab->plt->output_offset
6237 + ent->plt.offset);
6238 addend = 0;
6239 }
6240 if (r_type == R_PPC_RELAX32_PLT)
6241 goto relax32;
6242 /* Fall thru */
6243
6244 case R_PPC_RELAX32PC:
6245 relocation -= (input_section->output_section->vma
6246 + input_section->output_offset
6247 + rel->r_offset - 4);
6248 /* Fall thru */
6249
6250 case R_PPC_RELAX32:
6251 relax32:
6252 {
6253 unsigned long t0;
6254 unsigned long t1;
6255
6256 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6257 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6258
6259 /* We're clearing the bits for R_PPC_ADDR16_HA
6260 and R_PPC_ADDR16_LO here. */
6261 t0 &= ~0xffff;
6262 t1 &= ~0xffff;
6263
6264 /* t0 is HA, t1 is LO */
6265 relocation += addend;
6266 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6267 t1 |= relocation & 0xffff;
6268
6269 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6270 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6271 }
6272 continue;
6273
6274 /* Indirect .sdata relocation. */
6275 case R_PPC_EMB_SDAI16:
6276 BFD_ASSERT (htab->sdata[0].section != NULL);
6277 relocation
6278 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6279 h, relocation, rel);
6280 break;
6281
6282 /* Indirect .sdata2 relocation. */
6283 case R_PPC_EMB_SDA2I16:
6284 BFD_ASSERT (htab->sdata[1].section != NULL);
6285 relocation
6286 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6287 h, relocation, rel);
6288 break;
6289
6290 /* Handle the TOC16 reloc. We want to use the offset within the .got
6291 section, not the actual VMA. This is appropriate when generating
6292 an embedded ELF object, for which the .got section acts like the
6293 AIX .toc section. */
6294 case R_PPC_TOC16: /* phony GOT16 relocations */
6295 BFD_ASSERT (sec != NULL);
6296 BFD_ASSERT (bfd_is_und_section (sec)
6297 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6298 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6299
6300 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6301 break;
6302
6303 case R_PPC_PLTREL24:
6304 /* Relocation is to the entry for this symbol in the
6305 procedure linkage table. */
6306 {
6307 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6308
6309 addend = 0;
6310 if (ent == NULL
6311 || htab->plt == NULL)
6312 {
6313 /* We didn't make a PLT entry for this symbol. This
6314 happens when statically linking PIC code, or when
6315 using -Bsymbolic. */
6316 break;
6317 }
6318
6319 unresolved_reloc = FALSE;
6320 if (!htab->old_plt)
6321 relocation = (htab->glink->output_section->vma
6322 + htab->glink->output_offset
6323 + ent->glink_offset);
6324 else
6325 relocation = (htab->plt->output_section->vma
6326 + htab->plt->output_offset
6327 + ent->plt.offset);
6328 }
6329 break;
6330
6331 /* Relocate against _SDA_BASE_. */
6332 case R_PPC_SDAREL16:
6333 {
6334 const char *name;
6335
6336 BFD_ASSERT (sec != NULL);
6337 name = bfd_get_section_name (abfd, sec->output_section);
6338 if (! ((strncmp (name, ".sdata", 6) == 0
6339 && (name[6] == 0 || name[6] == '.'))
6340 || (strncmp (name, ".sbss", 5) == 0
6341 && (name[5] == 0 || name[5] == '.'))))
6342 {
6343 (*_bfd_error_handler)
6344 (_("%B: the target (%s) of a %s relocation is "
6345 "in the wrong output section (%s)"),
6346 input_bfd,
6347 sym_name,
6348 howto->name,
6349 name);
6350 }
6351 addend -= htab->sdata[0].sym_val;
6352 }
6353 break;
6354
6355 /* Relocate against _SDA2_BASE_. */
6356 case R_PPC_EMB_SDA2REL:
6357 {
6358 const char *name;
6359
6360 BFD_ASSERT (sec != NULL);
6361 name = bfd_get_section_name (abfd, sec->output_section);
6362 if (! (strncmp (name, ".sdata2", 7) == 0
6363 || strncmp (name, ".sbss2", 6) == 0))
6364 {
6365 (*_bfd_error_handler)
6366 (_("%B: the target (%s) of a %s relocation is "
6367 "in the wrong output section (%s)"),
6368 input_bfd,
6369 sym_name,
6370 howto->name,
6371 name);
6372
6373 bfd_set_error (bfd_error_bad_value);
6374 ret = FALSE;
6375 continue;
6376 }
6377 addend -= htab->sdata[1].sym_val;
6378 }
6379 break;
6380
6381 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6382 case R_PPC_EMB_SDA21:
6383 case R_PPC_EMB_RELSDA:
6384 {
6385 const char *name;
6386 int reg;
6387
6388 BFD_ASSERT (sec != NULL);
6389 name = bfd_get_section_name (abfd, sec->output_section);
6390 if (((strncmp (name, ".sdata", 6) == 0
6391 && (name[6] == 0 || name[6] == '.'))
6392 || (strncmp (name, ".sbss", 5) == 0
6393 && (name[5] == 0 || name[5] == '.'))))
6394 {
6395 reg = 13;
6396 addend -= htab->sdata[0].sym_val;
6397 }
6398
6399 else if (strncmp (name, ".sdata2", 7) == 0
6400 || strncmp (name, ".sbss2", 6) == 0)
6401 {
6402 reg = 2;
6403 addend -= htab->sdata[1].sym_val;
6404 }
6405
6406 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6407 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6408 {
6409 reg = 0;
6410 }
6411
6412 else
6413 {
6414 (*_bfd_error_handler)
6415 (_("%B: the target (%s) of a %s relocation is "
6416 "in the wrong output section (%s)"),
6417 input_bfd,
6418 sym_name,
6419 howto->name,
6420 name);
6421
6422 bfd_set_error (bfd_error_bad_value);
6423 ret = FALSE;
6424 continue;
6425 }
6426
6427 if (r_type == R_PPC_EMB_SDA21)
6428 { /* fill in register field */
6429 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6430 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6431 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6432 }
6433 }
6434 break;
6435
6436 /* Relocate against the beginning of the section. */
6437 case R_PPC_SECTOFF:
6438 case R_PPC_SECTOFF_LO:
6439 case R_PPC_SECTOFF_HI:
6440 case R_PPC_SECTOFF_HA:
6441 BFD_ASSERT (sec != NULL);
6442 addend -= sec->output_section->vma;
6443 break;
6444
6445 /* Negative relocations. */
6446 case R_PPC_EMB_NADDR32:
6447 case R_PPC_EMB_NADDR16:
6448 case R_PPC_EMB_NADDR16_LO:
6449 case R_PPC_EMB_NADDR16_HI:
6450 case R_PPC_EMB_NADDR16_HA:
6451 addend -= 2 * relocation;
6452 break;
6453
6454 case R_PPC_COPY:
6455 case R_PPC_GLOB_DAT:
6456 case R_PPC_JMP_SLOT:
6457 case R_PPC_RELATIVE:
6458 case R_PPC_PLT32:
6459 case R_PPC_PLTREL32:
6460 case R_PPC_PLT16_LO:
6461 case R_PPC_PLT16_HI:
6462 case R_PPC_PLT16_HA:
6463 case R_PPC_ADDR30:
6464 case R_PPC_EMB_RELSEC16:
6465 case R_PPC_EMB_RELST_LO:
6466 case R_PPC_EMB_RELST_HI:
6467 case R_PPC_EMB_RELST_HA:
6468 case R_PPC_EMB_BIT_FLD:
6469 (*_bfd_error_handler)
6470 (_("%B: relocation %s is not yet supported for symbol %s."),
6471 input_bfd,
6472 howto->name,
6473 sym_name);
6474
6475 bfd_set_error (bfd_error_invalid_operation);
6476 ret = FALSE;
6477 continue;
6478 }
6479
6480 /* Do any further special processing. */
6481 switch (r_type)
6482 {
6483 default:
6484 break;
6485
6486 case R_PPC_ADDR16_HA:
6487 case R_PPC_REL16_HA:
6488 case R_PPC_GOT16_HA:
6489 case R_PPC_PLT16_HA:
6490 case R_PPC_SECTOFF_HA:
6491 case R_PPC_TPREL16_HA:
6492 case R_PPC_DTPREL16_HA:
6493 case R_PPC_GOT_TLSGD16_HA:
6494 case R_PPC_GOT_TLSLD16_HA:
6495 case R_PPC_GOT_TPREL16_HA:
6496 case R_PPC_GOT_DTPREL16_HA:
6497 case R_PPC_EMB_NADDR16_HA:
6498 case R_PPC_EMB_RELST_HA:
6499 /* It's just possible that this symbol is a weak symbol
6500 that's not actually defined anywhere. In that case,
6501 'sec' would be NULL, and we should leave the symbol
6502 alone (it will be set to zero elsewhere in the link). */
6503 if (sec != NULL)
6504 /* Add 0x10000 if sign bit in 0:15 is set.
6505 Bits 0:15 are not used. */
6506 addend += 0x8000;
6507 break;
6508 }
6509
6510 #ifdef DEBUG
6511 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6512 "offset = %ld, addend = %ld\n",
6513 howto->name,
6514 (int) r_type,
6515 sym_name,
6516 r_symndx,
6517 (long) rel->r_offset,
6518 (long) addend);
6519 #endif
6520
6521 if (unresolved_reloc
6522 && !((input_section->flags & SEC_DEBUGGING) != 0
6523 && h->def_dynamic))
6524 {
6525 (*_bfd_error_handler)
6526 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6527 input_bfd,
6528 input_section,
6529 (long) rel->r_offset,
6530 howto->name,
6531 sym_name);
6532 ret = FALSE;
6533 }
6534
6535 r = _bfd_final_link_relocate (howto,
6536 input_bfd,
6537 input_section,
6538 contents,
6539 rel->r_offset,
6540 relocation,
6541 addend);
6542
6543 if (r != bfd_reloc_ok)
6544 {
6545 if (r == bfd_reloc_overflow)
6546 {
6547 if (warned)
6548 continue;
6549 if (h != NULL
6550 && h->root.type == bfd_link_hash_undefweak
6551 && howto->pc_relative)
6552 {
6553 /* Assume this is a call protected by other code that
6554 detect the symbol is undefined. If this is the case,
6555 we can safely ignore the overflow. If not, the
6556 program is hosed anyway, and a little warning isn't
6557 going to help. */
6558
6559 continue;
6560 }
6561
6562 if (! (*info->callbacks->reloc_overflow) (info,
6563 (h ? &h->root : NULL),
6564 sym_name,
6565 howto->name,
6566 rel->r_addend,
6567 input_bfd,
6568 input_section,
6569 rel->r_offset))
6570 return FALSE;
6571 }
6572 else
6573 {
6574 (*_bfd_error_handler)
6575 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6576 input_bfd, input_section,
6577 (long) rel->r_offset, howto->name, sym_name, (int) r);
6578 ret = FALSE;
6579 }
6580 }
6581 }
6582
6583 #ifdef DEBUG
6584 fprintf (stderr, "\n");
6585 #endif
6586
6587 return ret;
6588 }
6589 \f
6590 #define PPC_LO(v) ((v) & 0xffff)
6591 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6592 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6593
6594 /* Finish up dynamic symbol handling. We set the contents of various
6595 dynamic sections here. */
6596
6597 static bfd_boolean
6598 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6599 struct bfd_link_info *info,
6600 struct elf_link_hash_entry *h,
6601 Elf_Internal_Sym *sym)
6602 {
6603 struct ppc_elf_link_hash_table *htab;
6604 struct plt_entry *ent;
6605 bfd_boolean doneone;
6606
6607 #ifdef DEBUG
6608 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6609 h->root.root.string);
6610 #endif
6611
6612 htab = ppc_elf_hash_table (info);
6613 BFD_ASSERT (htab->elf.dynobj != NULL);
6614
6615 doneone = FALSE;
6616 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6617 if (ent->plt.offset != (bfd_vma) -1)
6618 {
6619 if (!doneone)
6620 {
6621 Elf_Internal_Rela rela;
6622 bfd_byte *loc;
6623 bfd_vma reloc_index;
6624
6625 if (!(htab->old_plt || htab->is_vxworks))
6626 reloc_index = ent->plt.offset / 4;
6627 else
6628 {
6629 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6630 / htab->plt_slot_size);
6631 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6632 && !htab->is_vxworks)
6633 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6634 }
6635
6636 /* This symbol has an entry in the procedure linkage table.
6637 Set it up. */
6638 if (htab->is_vxworks)
6639 {
6640 bfd_vma got_offset;
6641 const bfd_vma *plt_entry;
6642
6643 /* The first three entries in .got.plt are reserved. */
6644 got_offset = (reloc_index + 3) * 4;
6645
6646 /* Use the right PLT. */
6647 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6648 : ppc_elf_vxworks_plt_entry;
6649
6650 /* Fill in the .plt on VxWorks. */
6651 if (info->shared)
6652 {
6653 bfd_vma got_offset_hi = (got_offset >> 16)
6654 + ((got_offset & 0x8000) >> 15);
6655
6656 bfd_put_32 (output_bfd,
6657 plt_entry[0] | (got_offset_hi & 0xffff),
6658 htab->plt->contents + ent->plt.offset + 0);
6659 bfd_put_32 (output_bfd,
6660 plt_entry[1] | (got_offset & 0xffff),
6661 htab->plt->contents + ent->plt.offset + 4);
6662 }
6663 else
6664 {
6665 bfd_vma got_loc = (got_offset
6666 + htab->hgot->root.u.def.value
6667 + htab->hgot->root.u.def.section->output_offset
6668 + htab->hgot->root.u.def.section->output_section->vma);
6669 bfd_vma got_loc_hi = (got_loc >> 16)
6670 + ((got_loc & 0x8000) >> 15);
6671
6672 bfd_put_32 (output_bfd,
6673 plt_entry[0] | (got_loc_hi & 0xffff),
6674 htab->plt->contents + ent->plt.offset + 0);
6675 bfd_put_32 (output_bfd,
6676 plt_entry[1] | (got_loc & 0xffff),
6677 htab->plt->contents + ent->plt.offset + 4);
6678 }
6679
6680 bfd_put_32 (output_bfd, plt_entry[2],
6681 htab->plt->contents + ent->plt.offset + 8);
6682 bfd_put_32 (output_bfd, plt_entry[3],
6683 htab->plt->contents + ent->plt.offset + 12);
6684
6685 /* This instruction is an immediate load. The value loaded is
6686 the byte offset of the R_PPC_JMP_SLOT relocation from the
6687 start of the .rela.plt section. The value is stored in the
6688 low-order 16 bits of the load instruction. */
6689 /* NOTE: It appears that this is now an index rather than a
6690 prescaled offset. */
6691 bfd_put_32 (output_bfd,
6692 plt_entry[4] | reloc_index,
6693 htab->plt->contents + ent->plt.offset + 16);
6694 /* This instruction is a PC-relative branch whose target is
6695 the start of the PLT section. The address of this branch
6696 instruction is 20 bytes beyond the start of this PLT entry.
6697 The address is encoded in bits 6-29, inclusive. The value
6698 stored is right-shifted by two bits, permitting a 26-bit
6699 offset. */
6700 bfd_put_32 (output_bfd,
6701 (plt_entry[5]
6702 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6703 htab->plt->contents + ent->plt.offset + 20);
6704 bfd_put_32 (output_bfd, plt_entry[6],
6705 htab->plt->contents + ent->plt.offset + 24);
6706 bfd_put_32 (output_bfd, plt_entry[7],
6707 htab->plt->contents + ent->plt.offset + 28);
6708
6709 /* Fill in the GOT entry corresponding to this PLT slot with
6710 the address immediately after the the "bctr" instruction
6711 in this PLT entry. */
6712 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6713 + htab->plt->output_offset
6714 + ent->plt.offset + 16),
6715 htab->sgotplt->contents + got_offset);
6716
6717 if (!info->shared)
6718 {
6719 /* Fill in a couple of entries in .rela.plt.unloaded. */
6720 loc = htab->srelplt2->contents
6721 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6722 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6723 * sizeof (Elf32_External_Rela));
6724
6725 /* Provide the @ha relocation for the first instruction. */
6726 rela.r_offset = (htab->plt->output_section->vma
6727 + htab->plt->output_offset
6728 + ent->plt.offset + 2);
6729 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6730 R_PPC_ADDR16_HA);
6731 rela.r_addend = got_offset;
6732 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6733 loc += sizeof (Elf32_External_Rela);
6734
6735 /* Provide the @l relocation for the second instruction. */
6736 rela.r_offset = (htab->plt->output_section->vma
6737 + htab->plt->output_offset
6738 + ent->plt.offset + 6);
6739 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6740 R_PPC_ADDR16_LO);
6741 rela.r_addend = got_offset;
6742 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6743 loc += sizeof (Elf32_External_Rela);
6744
6745 /* Provide a relocation for the GOT entry corresponding to this
6746 PLT slot. Point it at the middle of the .plt entry. */
6747 rela.r_offset = (htab->sgotplt->output_section->vma
6748 + htab->sgotplt->output_offset
6749 + got_offset);
6750 rela.r_info = ELF32_R_INFO (htab->hplt->indx,
6751 R_PPC_ADDR32);
6752 rela.r_addend = ent->plt.offset + 16;
6753 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6754 }
6755
6756 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6757 In particular, the offset for the relocation is not the
6758 address of the PLT entry for this function, as specified
6759 by the ABI. Instead, the offset is set to the address of
6760 the GOT slot for this function. See EABI 4.4.4.1. */
6761 rela.r_offset = (htab->sgotplt->output_section->vma
6762 + htab->sgotplt->output_offset
6763 + got_offset);
6764
6765 }
6766 else
6767 {
6768 rela.r_offset = (htab->plt->output_section->vma
6769 + htab->plt->output_offset
6770 + ent->plt.offset);
6771 if (htab->old_plt)
6772 {
6773 /* We don't need to fill in the .plt. The ppc dynamic
6774 linker will fill it in. */
6775 }
6776 else
6777 {
6778 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6779 + htab->glink->output_section->vma
6780 + htab->glink->output_offset);
6781 bfd_put_32 (output_bfd, val,
6782 htab->plt->contents + ent->plt.offset);
6783 }
6784 }
6785
6786 /* Fill in the entry in the .rela.plt section. */
6787 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6788 rela.r_addend = 0;
6789
6790 loc = (htab->relplt->contents
6791 + reloc_index * sizeof (Elf32_External_Rela));
6792 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6793
6794 if (!h->def_regular)
6795 {
6796 /* Mark the symbol as undefined, rather than as defined in
6797 the .plt section. Leave the value alone. */
6798 sym->st_shndx = SHN_UNDEF;
6799 /* If the symbol is weak, we do need to clear the value.
6800 Otherwise, the PLT entry would provide a definition for
6801 the symbol even if the symbol wasn't defined anywhere,
6802 and so the symbol would never be NULL. */
6803 if (!h->ref_regular_nonweak)
6804 sym->st_value = 0;
6805 }
6806 doneone = TRUE;
6807 }
6808
6809 if (!htab->old_plt)
6810 {
6811 bfd_vma plt;
6812 unsigned char *p;
6813
6814 plt = (ent->plt.offset
6815 + htab->plt->output_section->vma
6816 + htab->plt->output_offset);
6817 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6818
6819 if (info->shared || info->pie)
6820 {
6821 bfd_vma got = 0;
6822
6823 if (ent->addend >= 32768)
6824 got = (ent->addend
6825 + ent->sec->output_section->vma
6826 + ent->sec->output_offset);
6827 else if (htab->elf.hgot != NULL)
6828 got = (htab->elf.hgot->root.u.def.value
6829 + htab->elf.hgot->root.u.def.section->output_section->vma
6830 + htab->elf.hgot->root.u.def.section->output_offset);
6831
6832 plt -= got;
6833
6834 if (plt + 0x8000 < 0x10000)
6835 {
6836 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6837 p += 4;
6838 bfd_put_32 (output_bfd, MTCTR_11, p);
6839 p += 4;
6840 bfd_put_32 (output_bfd, BCTR, p);
6841 p += 4;
6842 bfd_put_32 (output_bfd, NOP, p);
6843 p += 4;
6844 }
6845 else
6846 {
6847 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6848 p += 4;
6849 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6850 p += 4;
6851 bfd_put_32 (output_bfd, MTCTR_11, p);
6852 p += 4;
6853 bfd_put_32 (output_bfd, BCTR, p);
6854 p += 4;
6855 }
6856 }
6857 else
6858 {
6859 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6860 p += 4;
6861 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6862 p += 4;
6863 bfd_put_32 (output_bfd, MTCTR_11, p);
6864 p += 4;
6865 bfd_put_32 (output_bfd, BCTR, p);
6866 p += 4;
6867
6868 /* We only need one non-PIC glink stub. */
6869 break;
6870 }
6871 }
6872 else
6873 break;
6874 }
6875
6876 if (h->needs_copy)
6877 {
6878 asection *s;
6879 Elf_Internal_Rela rela;
6880 bfd_byte *loc;
6881
6882 /* This symbols needs a copy reloc. Set it up. */
6883
6884 #ifdef DEBUG
6885 fprintf (stderr, ", copy");
6886 #endif
6887
6888 BFD_ASSERT (h->dynindx != -1);
6889
6890 if (ppc_elf_hash_entry (h)->has_sda_refs)
6891 s = htab->relsbss;
6892 else
6893 s = htab->relbss;
6894 BFD_ASSERT (s != NULL);
6895
6896 rela.r_offset = (h->root.u.def.value
6897 + h->root.u.def.section->output_section->vma
6898 + h->root.u.def.section->output_offset);
6899 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
6900 rela.r_addend = 0;
6901 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6902 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6903 }
6904
6905 #ifdef DEBUG
6906 fprintf (stderr, "\n");
6907 #endif
6908
6909 /* Mark some specially defined symbols as absolute. */
6910 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6911 || (!htab->is_vxworks
6912 && (h == htab->elf.hgot
6913 || strcmp (h->root.root.string,
6914 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
6915 sym->st_shndx = SHN_ABS;
6916
6917 return TRUE;
6918 }
6919 \f
6920 static enum elf_reloc_type_class
6921 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
6922 {
6923 switch (ELF32_R_TYPE (rela->r_info))
6924 {
6925 case R_PPC_RELATIVE:
6926 return reloc_class_relative;
6927 case R_PPC_REL24:
6928 case R_PPC_ADDR24:
6929 case R_PPC_JMP_SLOT:
6930 return reloc_class_plt;
6931 case R_PPC_COPY:
6932 return reloc_class_copy;
6933 default:
6934 return reloc_class_normal;
6935 }
6936 }
6937 \f
6938 /* Finish up the dynamic sections. */
6939
6940 static bfd_boolean
6941 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
6942 struct bfd_link_info *info)
6943 {
6944 asection *sdyn;
6945 asection *splt;
6946 struct ppc_elf_link_hash_table *htab;
6947 bfd_vma got;
6948 bfd * dynobj;
6949
6950 #ifdef DEBUG
6951 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
6952 #endif
6953
6954 htab = ppc_elf_hash_table (info);
6955 dynobj = elf_hash_table (info)->dynobj;
6956 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6957 if (htab->is_vxworks)
6958 splt = bfd_get_section_by_name (dynobj, ".plt");
6959 else
6960 splt = NULL;
6961
6962 got = 0;
6963 if (htab->elf.hgot != NULL)
6964 got = (htab->elf.hgot->root.u.def.value
6965 + htab->elf.hgot->root.u.def.section->output_section->vma
6966 + htab->elf.hgot->root.u.def.section->output_offset);
6967
6968 if (htab->elf.dynamic_sections_created)
6969 {
6970 Elf32_External_Dyn *dyncon, *dynconend;
6971
6972 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
6973
6974 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6975 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6976 for (; dyncon < dynconend; dyncon++)
6977 {
6978 Elf_Internal_Dyn dyn;
6979 asection *s;
6980
6981 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
6982
6983 switch (dyn.d_tag)
6984 {
6985 case DT_PLTGOT:
6986 if (htab->is_vxworks)
6987 s = htab->sgotplt;
6988 else
6989 s = htab->plt;
6990 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6991 break;
6992
6993 case DT_PLTRELSZ:
6994 dyn.d_un.d_val = htab->relplt->size;
6995 break;
6996
6997 case DT_JMPREL:
6998 s = htab->relplt;
6999 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7000 break;
7001
7002 case DT_PPC_GOT:
7003 dyn.d_un.d_ptr = got;
7004 break;
7005
7006 case DT_RELASZ:
7007 if (htab->is_vxworks)
7008 {
7009 if (htab->relplt)
7010 dyn.d_un.d_ptr -= htab->relplt->size;
7011 break;
7012 }
7013 continue;
7014
7015 default:
7016 continue;
7017 }
7018
7019 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7020 }
7021 }
7022
7023 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7024 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7025 if (htab->got != NULL)
7026 {
7027 unsigned char *p = htab->got->contents;
7028 bfd_vma val;
7029
7030 p += elf_hash_table (info)->hgot->root.u.def.value;
7031 if (htab->old_plt && !htab->is_vxworks)
7032 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7033
7034 val = 0;
7035 if (sdyn != NULL)
7036 val = sdyn->output_section->vma + sdyn->output_offset;
7037 bfd_put_32 (output_bfd, val, p);
7038
7039 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7040 }
7041
7042 /* Fill in the first entry in the VxWorks procedure linkage table. */
7043 if (splt && splt->size > 0)
7044 {
7045 /* Use the right PLT. */
7046 static const bfd_vma *plt_entry = NULL;
7047 plt_entry = info->shared ?
7048 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7049
7050 if (!info->shared)
7051 {
7052 bfd_vma got_value =
7053 (htab->hgot->root.u.def.section->output_section->vma
7054 + htab->hgot->root.u.def.section->output_offset
7055 + htab->hgot->root.u.def.value);
7056 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7057
7058 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7059 splt->contents + 0);
7060 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7061 splt->contents + 4);
7062 }
7063 else
7064 {
7065 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7066 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7067 }
7068 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7069 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7070 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7071 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7072 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7073 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7074
7075 if (! info->shared)
7076 {
7077 Elf_Internal_Rela rela;
7078 bfd_byte *loc;
7079
7080 loc = htab->srelplt2->contents;
7081
7082 /* Output the @ha relocation for the first instruction. */
7083 rela.r_offset = (htab->plt->output_section->vma
7084 + htab->plt->output_offset
7085 + 2);
7086 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7087 rela.r_addend = 0;
7088 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7089 loc += sizeof (Elf32_External_Rela);
7090
7091 /* Output the @l relocation for the second instruction. */
7092 rela.r_offset = (htab->plt->output_section->vma
7093 + htab->plt->output_offset
7094 + 6);
7095 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7096 rela.r_addend = 0;
7097 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7098 loc += sizeof (Elf32_External_Rela);
7099
7100 /* Fix up the remaining relocations. They may have the wrong
7101 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7102 in which symbols were output. */
7103 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7104 {
7105 Elf_Internal_Rela rel;
7106
7107 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7108 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7109 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7110 loc += sizeof (Elf32_External_Rela);
7111
7112 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7113 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7114 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7115 loc += sizeof (Elf32_External_Rela);
7116
7117 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7118 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
7119 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7120 loc += sizeof (Elf32_External_Rela);
7121 }
7122 }
7123 }
7124
7125 if (htab->glink != NULL && htab->glink->contents != NULL)
7126 {
7127 unsigned char *p;
7128 unsigned char *endp;
7129 bfd_vma res0;
7130 unsigned int i;
7131
7132 /*
7133 * PIC glink code is the following:
7134 *
7135 * # ith PLT code stub.
7136 * addis 11,30,(plt+(i-1)*4-got)@ha
7137 * lwz 11,(plt+(i-1)*4-got)@l(11)
7138 * mtctr 11
7139 * bctr
7140 *
7141 * # A table of branches, one for each plt entry.
7142 * # The idea is that the plt call stub loads ctr (and r11) with these
7143 * # addresses, so (r11 - res_0) gives the plt index * 4.
7144 * res_0: b PLTresolve
7145 * res_1: b PLTresolve
7146 * .
7147 * # Some number of entries towards the end can be nops
7148 * res_n_m3: nop
7149 * res_n_m2: nop
7150 * res_n_m1:
7151 *
7152 * PLTresolve:
7153 * addis 11,11,(1f-res_0)@ha
7154 * mflr 0
7155 * bcl 20,31,1f
7156 * 1: addi 11,11,(1b-res_0)@l
7157 * mflr 12
7158 * mtlr 0
7159 * sub 11,11,12 # r11 = index * 4
7160 * addis 12,12,(got+4-1b)@ha
7161 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7162 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7163 * mtctr 0
7164 * add 0,11,11
7165 * add 11,0,11 # r11 = index * 12 = reloc offset.
7166 * bctr
7167 */
7168 static const unsigned int pic_plt_resolve[] =
7169 {
7170 ADDIS_11_11,
7171 MFLR_0,
7172 BCL_20_31,
7173 ADDI_11_11,
7174 MFLR_12,
7175 MTLR_0,
7176 SUB_11_11_12,
7177 ADDIS_12_12,
7178 LWZ_0_12,
7179 LWZ_12_12,
7180 MTCTR_0,
7181 ADD_0_11_11,
7182 ADD_11_0_11,
7183 BCTR,
7184 NOP,
7185 NOP
7186 };
7187
7188 static const unsigned int plt_resolve[] =
7189 {
7190 LIS_12,
7191 ADDIS_11_11,
7192 LWZ_0_12,
7193 ADDI_11_11,
7194 MTCTR_0,
7195 ADD_0_11_11,
7196 LWZ_12_12,
7197 ADD_11_0_11,
7198 BCTR,
7199 NOP,
7200 NOP,
7201 NOP,
7202 NOP,
7203 NOP,
7204 NOP,
7205 NOP
7206 };
7207
7208 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7209 abort ();
7210 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7211 abort ();
7212
7213 /* Build the branch table, one for each plt entry (less one),
7214 and perhaps some padding. */
7215 p = htab->glink->contents;
7216 p += htab->glink_pltresolve;
7217 endp = htab->glink->contents;
7218 endp += htab->glink->size - GLINK_PLTRESOLVE;
7219 while (p < endp - 8 * 4)
7220 {
7221 bfd_put_32 (output_bfd, B + endp - p, p);
7222 p += 4;
7223 }
7224 while (p < endp)
7225 {
7226 bfd_put_32 (output_bfd, NOP, p);
7227 p += 4;
7228 }
7229
7230 res0 = (htab->glink_pltresolve
7231 + htab->glink->output_section->vma
7232 + htab->glink->output_offset);
7233
7234 /* Last comes the PLTresolve stub. */
7235 if (info->shared || info->pie)
7236 {
7237 bfd_vma bcl;
7238
7239 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7240 {
7241 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7242 p += 4;
7243 }
7244 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7245
7246 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7247 + htab->glink->output_section->vma
7248 + htab->glink->output_offset);
7249
7250 bfd_put_32 (output_bfd,
7251 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7252 bfd_put_32 (output_bfd,
7253 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7254 bfd_put_32 (output_bfd,
7255 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7256 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7257 {
7258 bfd_put_32 (output_bfd,
7259 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7260 bfd_put_32 (output_bfd,
7261 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7262 }
7263 else
7264 {
7265 bfd_put_32 (output_bfd,
7266 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7267 bfd_put_32 (output_bfd,
7268 LWZ_12_12 + 4, p + 9*4);
7269 }
7270 }
7271 else
7272 {
7273 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7274 {
7275 bfd_put_32 (output_bfd, plt_resolve[i], p);
7276 p += 4;
7277 }
7278 p -= 4 * ARRAY_SIZE (plt_resolve);
7279
7280 bfd_put_32 (output_bfd,
7281 LIS_12 + PPC_HA (got + 4), p + 0*4);
7282 bfd_put_32 (output_bfd,
7283 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7284 bfd_put_32 (output_bfd,
7285 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7286 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7287 {
7288 bfd_put_32 (output_bfd,
7289 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7290 bfd_put_32 (output_bfd,
7291 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7292 }
7293 else
7294 {
7295 bfd_put_32 (output_bfd,
7296 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7297 bfd_put_32 (output_bfd,
7298 LWZ_12_12 + 4, p + 6*4);
7299 }
7300 }
7301 }
7302
7303 return TRUE;
7304 }
7305 \f
7306 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7307 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7308 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7309 #define TARGET_BIG_NAME "elf32-powerpc"
7310 #define ELF_ARCH bfd_arch_powerpc
7311 #define ELF_MACHINE_CODE EM_PPC
7312 #ifdef __QNXTARGET__
7313 #define ELF_MAXPAGESIZE 0x1000
7314 #else
7315 #define ELF_MAXPAGESIZE 0x10000
7316 #endif
7317 #define ELF_MINPAGESIZE 0x1000
7318 #define elf_info_to_howto ppc_elf_info_to_howto
7319
7320 #ifdef EM_CYGNUS_POWERPC
7321 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7322 #endif
7323
7324 #ifdef EM_PPC_OLD
7325 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7326 #endif
7327
7328 #define elf_backend_plt_not_loaded 1
7329 #define elf_backend_can_gc_sections 1
7330 #define elf_backend_can_refcount 1
7331 #define elf_backend_rela_normal 1
7332
7333 #define bfd_elf32_mkobject ppc_elf_mkobject
7334 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7335 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7336 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7337 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7338 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7339
7340 #define elf_backend_object_p ppc_elf_object_p
7341 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7342 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7343 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7344 #define elf_backend_relocate_section ppc_elf_relocate_section
7345 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7346 #define elf_backend_check_relocs ppc_elf_check_relocs
7347 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7348 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7349 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7350 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7351 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7352 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7353 #define elf_backend_fake_sections ppc_elf_fake_sections
7354 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7355 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7356 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7357 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7358 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7359 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7360 #define elf_backend_write_section ppc_elf_write_section
7361 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7362 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7363
7364 #include "elf32-target.h"
7365
7366 /* VxWorks Target */
7367
7368 #undef TARGET_LITTLE_SYM
7369 #undef TARGET_LITTLE_NAME
7370
7371 #undef TARGET_BIG_SYM
7372 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7373 #undef TARGET_BIG_NAME
7374 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7375
7376 /* VxWorks uses the elf default section flags for .plt. */
7377 static const struct bfd_elf_special_section *
7378 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7379 {
7380 if (sec->name == NULL)
7381 return NULL;
7382
7383 if (strcmp (sec->name, ".plt") == 0)
7384 return _bfd_elf_get_sec_type_attr (abfd, sec);
7385
7386 return ppc_elf_get_sec_type_attr (abfd, sec);
7387 }
7388
7389 /* Like ppc_elf_link_hash_table_create, but overrides
7390 appropriately for VxWorks. */
7391 static struct bfd_link_hash_table *
7392 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7393 {
7394 struct bfd_link_hash_table *ret;
7395
7396 ret = ppc_elf_link_hash_table_create (abfd);
7397 if (ret)
7398 {
7399 struct ppc_elf_link_hash_table *htab
7400 = (struct ppc_elf_link_hash_table *)ret;
7401 htab->is_vxworks = 1;
7402 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7403 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7404 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7405 }
7406 return ret;
7407 }
7408
7409 /* Tweak magic VxWorks symbols as they are loaded. */
7410 static bfd_boolean
7411 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7412 struct bfd_link_info *info,
7413 Elf_Internal_Sym *sym,
7414 const char **namep ATTRIBUTE_UNUSED,
7415 flagword *flagsp ATTRIBUTE_UNUSED,
7416 asection **secp,
7417 bfd_vma *valp)
7418 {
7419 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7420 valp))
7421 return FALSE;
7422
7423 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7424 }
7425
7426 /* Tweak magic VxWorks symbols as they are written to the output file. */
7427 static bfd_boolean
7428 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7429 ATTRIBUTE_UNUSED,
7430 const char *name,
7431 Elf_Internal_Sym *sym,
7432 asection *input_sec ATTRIBUTE_UNUSED,
7433 struct elf_link_hash_entry *h
7434 ATTRIBUTE_UNUSED)
7435 {
7436 /* Ignore the first dummy symbol. */
7437 if (!name)
7438 return TRUE;
7439
7440 return elf_vxworks_link_output_symbol_hook (name, sym);
7441 }
7442
7443 static void
7444 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7445 {
7446 ppc_elf_final_write_processing(abfd, linker);
7447 elf_vxworks_final_write_processing(abfd, linker);
7448 }
7449
7450 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7451 define it. */
7452 #undef elf_backend_want_plt_sym
7453 #define elf_backend_want_plt_sym 1
7454 #undef elf_backend_want_got_plt
7455 #define elf_backend_want_got_plt 1
7456 #undef elf_backend_got_symbol_offset
7457 #define elf_backend_got_symbol_offset 0
7458 #undef elf_backend_plt_not_loaded
7459 #define elf_backend_plt_not_loaded 0
7460 #undef elf_backend_plt_readonly
7461 #define elf_backend_plt_readonly 1
7462 #undef elf_backend_got_header_size
7463 #define elf_backend_got_header_size 12
7464
7465 #undef bfd_elf32_bfd_link_hash_table_create
7466 #define bfd_elf32_bfd_link_hash_table_create \
7467 ppc_elf_vxworks_link_hash_table_create
7468 #undef elf_backend_add_symbol_hook
7469 #define elf_backend_add_symbol_hook \
7470 ppc_elf_vxworks_add_symbol_hook
7471 #undef elf_backend_link_output_symbol_hook
7472 #define elf_backend_link_output_symbol_hook \
7473 elf_i386_vxworks_link_output_symbol_hook
7474 #undef elf_backend_final_write_processing
7475 #define elf_backend_final_write_processing \
7476 ppc_elf_vxworks_final_write_processing
7477 #undef elf_backend_get_sec_type_attr
7478 #define elf_backend_get_sec_type_attr \
7479 ppc_elf_vxworks_get_sec_type_attr
7480 #undef elf_backend_emit_relocs
7481 #define elf_backend_emit_relocs \
7482 elf_vxworks_emit_relocs
7483
7484 #undef elf32_bed
7485 #define elf32_bed ppc_elf_vxworks_bed
7486
7487 #include "elf32-target.h"